Log in

Relevant bibliographies by topics / Thermoplastic starch

Contents

Journal articles
Dissertations / Theses
Books
Book chapters
Conference papers

Academic literature on the topic 'Thermoplastic starch'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 May 2024

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Thermoplastic starch.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Thermoplastic starch"

1

Usman, N., L. G. Hassan, M. N. Almustapha, M. Achor, and E. C. Agwamba. "Preparation and Characterization of Thermoplastic Cassava and Sweet Potato Starches." Nigerian Journal of Basic and Applied Sciences 30, no. 2 (October 18, 2023): 118–25. http://dx.doi.org/10.4314/njbas.v30i2.16.

Full text

Abstract:

Thermoplastics starches are plastics made from renewable resources like plants that are fully bio-based and biodegradable. The aim of this study was to produce and characterize thermoplastic using starches extracted from cassava and sweet potato. The effect of variable amounts of glycerol used as plasticizer and acetic acid used for hydrolysis of the starch polymer were investigated. The intermolecular interaction between the starch and glycerol was ascertained using FT-IR spectroscopy. The biodegradability test conducted on both cassava thermoplastic starch (TPSc) and potato thermoplastic starch (TPSp) were found to lose 36% and 23% respectively of their initial weights after seven days of soil burial. The result showed that as plasticizer concentration increased from 50 to 80%, there was an increase in both moisture and oil uptake but a decrease in water uptake. However, an increase in acetic acid concentration from 2.5% to 7.5% resulted in a decrease in oil uptake, water uptake and moisture uptake of the thermoplastics. Findings in this study reveal increase in the amount of glycerol plasticizer in both thermoplastics increases moisture contents retention however the observed oil uptake and biodegradability properties suggest the thermoplastic starches especially the potato thermoplastic starch is generally suitable for making eco-friendly thermoplastics.

APA, Harvard, Vancouver, ISO, and other styles

2

Xie, Fengwei, Paul Luckman, John Milne, Lachlan McDonald, Conor Young, Chen Yang Tu, Teo Di Pasquale, Reinhard Faveere, and Peter J. Halley. "Thermoplastic Starch." Journal of Renewable Materials 2, no. 2 (May 1, 2014): 95–106. http://dx.doi.org/10.7569/jrm.2014.634104.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Stepto, R. F. T. "Thermoplastic starch." Macromolecular Symposia 152, no. 1 (March 2000): 73–82. http://dx.doi.org/10.1002/1521-3900(200003)152:1<73::aid-masy73>3.0.co;2-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Stepto, R. F. T. "Thermoplastic Starch." Macromolecular Symposia 279, no. 1 (May 2009): 163–68. http://dx.doi.org/10.1002/masy.200950525.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Yeaprayoon, Siraprapha, Hataithip Sanpromma, Nattapohn Sukkasem, and Supatra Pratumshat. "PREPARATION AND CHARACTERIZATION OF THERMOPLASTIC STARCH FROM PINEAPPLE STEM: EFFECT OF PLASTICIZERS." Suranaree Journal of Science and Technology 30, no. 3 (August 7, 2023): 030113(1–7). http://dx.doi.org/10.55766/sujst-2023-03-e02056.

Full text

Abstract:

This work studied the effect of types and amount of plasticizers on thermoplastic starch properties from pineapple stem with good mechanical properties, water resistant and biodegradable. Three plasticizers were studied: erythritol, xylitol, and sorbitol. Thermoplastic starch film was prepared by solution casting. When glycerol was used as co plasticizer, it could improve the flexibility of thermoplastic starch. Thermal properties of thermoplastic starch film by DSC showed that when the plasticizers were added, the heat of fusion (DHm) was reduced. Water absorption of thermoplastic starch films are maximum in 1 hour and constant after immersed in distilled water for 3 hours. Films can maintain in their shapes at least 13 days after that they dissolved. Thermoplastic starch from pineapple stem and plasticizers i.e. sorbitol and xylitol showed no significant difference in water absorption. Thermoplastic starch films from mixed plasticizers showed more hydrophilic when compared with film from single plasticizer. Films without glycerol show high tensile strength and modulus. Thermoplastic starch film from pineapple stem is water resistant and biodegradable in water. All thermoplastic starch degraded within 30 days after biodegradability test in soil. Thermoplastic starch film made from pineapple stem is considered a naturally biodegradable plastic.

APA, Harvard, Vancouver, ISO, and other styles

6

Yu, Jiugao, Jianping Gao, and Tong Lin. "Biodegradable thermoplastic starch." Journal of Applied Polymer Science 62, no. 9 (November 28, 1996): 1491–94. http://dx.doi.org/10.1002/(sici)1097-4628(19961128)62:9<1491::aid-app19>3.0.co;2-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Tao, Jie, Yi Hua Cui, Xue Lai Ji, Li Ma, and Ding Zhu Wo. "Properties of Biodegradable Thermoplastic Starch/Ethyl Cellulose Composite." Key Engineering Materials 334-335 (March 2007): 345–48. http://dx.doi.org/10.4028/www.scientific.net/kem.334-335.345.

Full text

Abstract:

Since thermoplastic starch can not be used directly due to its poor properties in processing, thermoplastic starch /ethyl cellulose composite is prepared by blending method in this work. The effect of the composition and the structure on the properties of the composite is studied. The results indicate that glycerin is a better plasticizer in the processing of the thermoplastic starch compared to glycol. The mechanical properties of the thermoplastic starch are improved obviously after blending with ethyl cellulose. The composite exhibits comprehensive properties as the content of the ethyl cellulose is kept at 10%, which also has a reasonable cost.

APA, Harvard, Vancouver, ISO, and other styles

8

Nossa, Tamires S., Naceur M. Belgacem, Alessandro Gandini, and Antonio JF Carvalho. "Thermoreversible crosslinked thermoplastic starch." Polymer International 64, no. 10 (April 23, 2015): 1366–72. http://dx.doi.org/10.1002/pi.4925.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Angellier, Hélène, Sonia Molina-Boisseau, Patrice Dole, and Alain Dufresne. "Thermoplastic Starch−Waxy Maize Starch Nanocrystals Nanocomposites." Biomacromolecules 7, no. 2 (February 2006): 531–39. http://dx.doi.org/10.1021/bm050797s.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Paiva, Diana, André Pereira, Ana Pires, Jorge Martins, Luísa Carvalho, and Fernão Magalhães. "Reinforcement of Thermoplastic Corn Starch with Crosslinked Starch/Chitosan Microparticles." Polymers 10, no. 9 (September 4, 2018): 985. http://dx.doi.org/10.3390/polym10090985.

Full text

Abstract:

Microparticles of corn starch and chitosan crosslinked with glutaraldehyde, produced by the solvent exchange technique, are studied as reinforcement fillers for thermoplastic corn starch plasticized with glycerol. The presence of 10% w/w chitosan in the microparticles is shown to be essential to guaranteeing effective crosslinking, as demonstrated by water solubility assays. Crosslinked chitosan forms an interpenetrating polymer network with starch chains, producing microparticles with a very low solubility. The thermal stability of the microparticles is in agreement with their polysaccharide composition. An XRD analysis showed that they have crystalline fraction of 32% with Va-type structure, and have no tendency to undergo retrogradation. The tensile strength, Young’s modulus, and toughness of thermoplastic starch increased by the incorporation of the crosslinked starch/chitosan microparticles by melt-mixing. Toughness increased 360% in relation to unfilled thermoplastic starch.

APA, Harvard, Vancouver, ISO, and other styles

More sources

Dissertations / Theses on the topic "Thermoplastic starch"

1

Ha, Seung-kyu. "Starch incorporated polymerization of thermoplastic polyurethan." [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=965659852.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Lescher, Peter Edward. "Moulding of Water-Free Thermoplastic Starch Blends." Thesis, University of Auckland, 2010. http://hdl.handle.net/2292/6632.

Full text

Abstract:

Thermoplastic starch (TPS) is one of a number of biodegradable polymers which have become increasingly attractive in recent times as substitutes for petrochemicals. Starch is seen as particularly useful as both a low-cost filler and a promoter of biodegradation processes. A novel water-free TPS blend suitable for rotational moulding and other conventional thermoplastic manufacturing processes is presented here. A method for producing water-free TPS blends in a single extrusion with commodity polymer processing equipment has been developed. Selected mechanical properties of blends with a rotomoulding-grade polyethylene (PE) have been characterized, using different total TPS content, plasticizer type and amount. Extruded, injection moulded and rotomoulded samples were tested, both fresh and after aging, and compatibilizing additives were investigated. Completely biodegradable blends of TPS, poly(lactic acid) (PLA) and polybutylene succinate (PBS) were also demonstrated as rotomouldable and characterized in terms of mechanical properties. The ultimate tensile strength (UTS) of TPS/PE blends was found to be relatively consistent across TPS formulations and manufacturing methods, and not as high as PE alone. Tensile modulus was found to be more variable and could be raised or lowered with relation to PE. Compatibilizers had noticable but small effects. An increase in UTS was found to coincide with a TPS/PE modulus matching that of the PE alone, and a decrease in elongation to break. The impact strength of rotomoulded TPS/PE was low compared to the PE reference. Water-free blends have also been investigated in terms of electrical conductivity and oxygen barrier properties. Compression-moulded TPS/PE films were found to be an improvement on PE, and the TPS alone was demonstrated as an excellent oxygen barrier even when highly plasticized. The electrical conductivity of TPS was found to improve with the addition of either salts or dispersed conductive particles, despite the lack of water, indicating potential as a cheap electroactive polymer.

APA, Harvard, Vancouver, ISO, and other styles

3

Gilfillan, William N. "Developing starch-based polymer composites." Thesis, Queensland University of Technology, 2015. https://eprints.qut.edu.au/86612/6/William_Gilfillan_Thesis.pdf.

Full text

Abstract:

This project aim was to replace petroleum-based plastic packaging materials that pollute the environment, with biodegradable starch-based polymer composites. It was demonstrated that untreated sugar cane bagasse microfibres and unbleached nanofibres significantly improved the physical, mechanical and chemical properties of starch films, while thermal extrusion of starch with alcohol improved the stiffness and the addition of aconitic acid cross-linked the film making it moisture resistant and extensible.

APA, Harvard, Vancouver, ISO, and other styles

4

Szegda, Damian. "Experimental investigation and computational modelling of the thermoforming process of thermoplastic starch." Thesis, Brunel University, 2009. http://bura.brunel.ac.uk/handle/2438/3445.

Full text

Abstract:

Plastic packaging waste currently forms a significant part of municipal solid waste and as such is causing increasing environmental concerns. Such packaging is largely non-biodegradable and is particularly difficult to recycle or to reuse due largely to its complex compositions. Apart from limited recycling of some easily identifiable packaging wastes that can be separated economically, such as bottles, most packaging waste ends up in landfill sites. In recent years, in an attempt to address this problem in plastic packaging, the development of packaging materials from renewable plant resources has received increasing attention and a wide range of bioplastic materials based on starch are now available. Environmentally these bioplastic materials also reduce reliance on oil resources and have the advantage that they are biodegradable and can be composted upon disposal to reduce the environmental impact. Many food packaging containers are produced by thermoforming processes in which thin sheets are inflated under pressure into moulds to produce the required thin -wall structures. Hitherto these thin sheets have almost exclusively been made of oilbased polymers and it is for these that computational models of thermoforming processes have been developed. Recently, in the context of bioplastics, commercial thermoplastic starch sheet materials have been developed. The behaviour of such materials is influenced both by temperature and, because of the inherent hydrophilic characteristics of the materials, by moisture content. Both of these aspects affect the behaviour of bioplastic sheets during the thermoforming process. This thesis describes experimental work and work on the computational modelling of thermoforming processes for thermoplastic starch sheets using a commercially available material. The experimental work has been carried in order to characterise the deformation behaviour of the material with regard to different temperature, moisture contents and strain rates. Thermoforming of the material was performed and samples produced were used for comparison and verification of the computational modelling of the thermoforming process. In the first attempt to model the thermoforming process, a hyperelastic constitutive equation was established to approximate the material behaviour taking account of the combined effects of temperature and moisture content and a simple ii membrane model with constrained deformation was used to model an axisymmetric case of thermoforming. Simulations with this model showed that moisture content mostly affects the pressure required to push the sheet into the mould while moisture variation during thermoforming has little effect on the final thickness distribution of the product. Considerable discrepancies were found in the thickness distribution between the predictions from the model and the experimental measurements. Further attempts were made to take account of the elasto-plastic behaviour of the material and a more complex three-dimensional FE model was developed using ANSYS/LS-DYNA. Based on the findings in the simpler modelling work, no attempt was made to incorporate the moisture content effect on material behaviour but the material parameters for the elasto-plastic constitutive equation were obtained from high speed tensile tests so that moisture variation during thermoforming could be minimised and neglected. The predictions from this model have led to significant improvements in prediction of the thickness distribution which has become much closer to the experimental measurements in comparison with the hyperelastic model. This work provides some important insights into thermoforming of thermoplastic starch materials: a) Deformation behaviour of such materials depends strongly on the moisture content and the temperature, both of which affect behaviour during thermoforming processes, including the preheating stage; b) moisture variation during the thermoforming process has a significant effect on the pressure required for the deformation. This also leads to variation of moisture content distribution in the final product, which in turn affects the material properties such as ductility or impact strength at different positions in the thermoformed structure; c) thermoforming of thermoplastic starch materials can be simulated more accurately by an elasto-plastic model and the LS-DYNA algorithm in comparison with a hyperelastic membrane model. This work has provided useful information on thermoforming of thermoplastic starch materials with particular reference to the design of thermoforming tools and to the careful control of processing conditions including preheating. It has also laid a solid foundation for future work on how the moisture variation impacts on the formation of defects such as incomplete forming due to material hardening and fracture due to loss of ductility.

APA, Harvard, Vancouver, ISO, and other styles

5

Jadawi, Akram. "Expanded bio-thermoplastic foam obtained from starch : thermo-physical and mechanical characterizations." Rouen, 2014. http://www.theses.fr/2014ROUES019.

Full text

Abstract:

Les matériaux concernés sont issus de ressources renouvelables protéiniquement pauvres (amidon de farine de blé) qui sont extrudés pour différentes compositions et conditions d’extrusion. Le résultat est un polymère 100% naturel poreux en forme de tube présentant des propriétés mécaniques très sensibles aux conditions de préparation. L’objective générale de cette thèse est de développer un polymère biodégradable écologique qui pourra limiter la production des polymères issue du pétrole comme le Polystyrène expansé. Pour atteindre cet objectif, le matériau a été caractérisé en établissant la relation entre les procédés d’élaboration (conditions d’extrusion, l’effet de plastifiants), les propriétés physico-chimiques, microstructurales (épaisseur moyenne de parois, type de mousse, numéro et taille moyenne de pores) et les propriétés mécaniques. En suite, les propriétés mécaniques ont été modélisées en utilisant des lois de comportement qui décrive ces types des matériaux. La corrélation d’image était aussi utilisée pour la modélisation de comportements mécaniques.

APA, Harvard, Vancouver, ISO, and other styles

6

Pecku, Suven. "The use of thermoplastic starch for the modification of hydrophilic breathable membranes." Diss., Pretoria : [s.n.], 2009. http://upetd.up.ac.za/thesis/available/etd-06302009-175421/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Pontes, Barbara Regina Bouças. "Preparação e caracterização de termoplásticos a partir de amido de arroz." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/75/75134/tde-24072012-171908/.

Full text

Abstract:

O presente trabalho teve como proposta a preparação de amidos termoplásticos (TPS) e compósitos a partir de amido de arroz e subprodutos do processo de beneficiamento do arroz, no qual resulta em 20% de palha e 14% de grãos quebrados. Estudou-se o amido de arroz como nova fonte para preparação de termoplásticos, avaliou-se o efeito da incorporação de palha de arroz aos TPS a fim de superar as limitações apresentadas por estes tais como baixo desempenho mecânico e alta absorção de umidade, avaliou-se a possibilidade de preparação de termoplásticos diretamente dos grãos de arroz e quirera e investigou-se a influência das condições de processamento (tempo e temperatura) na preparação dos termoplásticos. O amido de arroz foi plasticizado com glicerol em proporções que variaram de 20 a 40%. Para os compósitos, o teor de reforço (palha) variou de 1 a 5% e o teor de glicerol foi fixado em 30%. Tanto os materiais de partida quanto os termoplásticos e compósitos obtidos foram caracterizados por MEV e difração de raios-X; quanto às propriedades térmicas por TG, DSC e DMTA; quanto às propriedades mecânicas por ensaio mecânico de tração. O comportamento frente à absorção de água também foi investigado. O estudo das condições de processamento foi feito com base nos resultados obtidos a partir da reometria de torque, difração de raios-X e MEV e demonstrou que a utilização de apenas uma das técnicas é insuficiente para determinação das condições de processamento que melhor contribuem para desestruturação do grânulo, mistura e homogeneização do TPS. Os TPS preparados a partir de amido de arroz e glicerol seguiram a mesma tendência de variação de suas propriedades em função do teor de plasticizante que os TPS preparados a partir de outras fontes de amido. Levando em consideração TPS preparados a partir de amido de mandioca, milho e batata, observa-se que os TPS preparados a partir de amido de arroz apresentaram a menor absorção de água. Em relação aos compósitos, a palha contribuiu para melhorar o desempenho mecânico, no entanto favoreceu o aumento da absorção de água. Foi possível obter termoplásticos preparados diretamente dos grãos de arroz (polido e integral) e da quirera. Em comparação com o TPS amido/glicerol, os TPS obtidos a partir dos grãos apresentaram maior cristalinidade, rigidez e temperatura de transição vítrea. No entanto, apresentaram menor estabilidade térmica, menor ductilidade e maior absorção de água.
This work aimed at preparation of thermoplastic starch (TPS) and composites from rice starch and byproducts of the beneficiation process of rice, which results in 20% of husk and 14% of broken grains. The rice starch was studied as a new source for preparing thermoplastics. The effect of incorporation of rice husk to the TPS was evaluated aiming to overcome the limitations presented by pure TPS such as poor mechanical properties and high moisture absorption. The preparation of thermoplastic directly from grain and broken rice was also studied. The rice starch was plasticized with glycerol in proportions ranging from 20 to 40%. For composites, the amount of husk ranged from 1 to 5% and glycerol content was 30%. The effect of processing conditions (time and temperature) in the preparation of thermoplastics were investigated. Starting materials, thermoplastics and composites were characterized by SEM and X-ray diffraction; the thermal properties by TG, DSC and DMTA; and mechanical properties by mechanical tests. The behavior in the water uptake was also investigated. The processing conditions study was based on the results obtained from the torque rheometry, X-ray diffraction and scanning electron microscopy and demonstrated that the use of only one technique is inadequate to determine the best processing conditions. The TPS prepared from rice starch and glycerol followed the same trend of variation of its properties as a function of plasticizer content when compared to TPS prepared from other starch sources. Considering TPS prepared from cassava starch, corn and potato, it was observed that the TPS prepared from rice starch presented a lower water uptake. For composites, husk has improved mechanical performance, but favors the increase in water uptake. It was possible to obtain thermoplastic prepared directly from grain rice (polished and integral) and broken grain. Compared to the starch/glycerol TPS, TPS obtained from the grains had higher crystallinity, and stiffness and glass transition temperature. However, had lower thermal stability, lower ductility and increased absorption of water.

APA, Harvard, Vancouver, ISO, and other styles

8

Gonzalez, Inês Antunes. "Characterization of a biodegradable starch based film. Application on the preservation of fresh spinach." Master's thesis, ISA-UL, 2016. http://hdl.handle.net/10400.5/12114.

Full text

Abstract:

Mestrado em Engenharia Alimentar - Instituto Superior de Agronomia - UL
The goal of the present study was the characterization of a biodegradable thermoplastic starch based wrap film (TPS), produced from Mater-Bi®, and its application on the preservation of ready prepared fresh-cut spinach, in parallel with the non-biodegradable polyvinyl chloride (PVC) wrap film. The TPS-based film presented a similar vapour adsorption (< 5%, dry basis) to the PVC film. In addition, the carbon dioxide and oxygen permeability was in the same range (TPS-based: PCO2 =34.6x10-17-76.1x10-17mol.m/m2sPa, PO2 =3.41x10-17 – 5.71x10-17 mol.m/m2sPa; PVC: PCO2 = 34.5x1017 – 62.8x10-17mol.m/m2sPa, PO2 = 3.03x10-17 – 6.21x10-17 mol.m/m2sPa), and was not significantly affected by the relative humidity. The major differences detected were in what concerns water vapour permeability, (0.9x10-12 - 1.27x10-12 mol.m/m2sPa and 3.64x10-12 – 4.43x10-12 mol.m/m2sPa for TPSbased and PVC film) and strain at break (5.7 times higher for TPS-based under extension tests). TPSbased film showed a better transparency for white colour, although for green, yellow and red it was the PVC having better results. Both films revealed to have a similar performance in fresh-cut spinach preservation. The major difference was detected on the preventing weight loss, as PVC film showed to be more effective than TPS-based film due to its higher water vapour barrier. Based on the results obtained it can be concluded that the tested thermoplastic starch based wrap film is a strong substitute, ecological, to conventional PVC-based film

APA, Harvard, Vancouver, ISO, and other styles

9

Winkler, Henning. "Synthese von thermoplastisch verarbeitbaren Fettsäure-Acylderivaten der Stärke und Proteine." Phd thesis, Universität Potsdam, 2013. http://opus.kobv.de/ubp/volltexte/2014/7108/.

Full text

Abstract:

In den vergangenen Jahren wurden stetig wachsende Produktionskapazitäten von Biokunststoffen aus nachwachsenden Rohstoffe nverzeichnet. Trotz großer Produktionskapazitäten und einem geeigneten Eigenschaftsprofil findet Stärke nur als hydrophile, mit Weichmachern verarbeitete thermoplastische Stärke (TPS) in Form von Blends mit z. B. Polyestern Anwendung. Gleiches gilt für Kunststoffe auf Proteinbasis. Die vorliegende Arbeit hat die Entwicklung von Biokunststoffen auf Stärkebasis zum Ziel, welche ohne externe Weichmacher thermoplastisch verarbeitbar und hydrophob sind sowie ein mechanisches Eigenschaftsprofil aufweisen, welches ein Potenzial zur Herstellung von Materialien für eine Anwendung als Verpackungsmittel bietet. Um die Rohstoffbasis für Biokunststoffe zu erweitern, soll das erarbeitete Konzept auf zwei industriell verfügbare Proteintypen, Zein und Molkenproteinisolat (WPI), übertragen werden. Als geeignete Materialklasse wurden Fettsäureester der Stärke herausgearbeitet. Zunächst fand ein Vergleich der Säurechlorid-Veresterung und der Umesterung von Fettsäurevinylestern statt, woraus letztere als geeignetere Methode hervorging. Durch Variation der Reaktionsparameter konnte diese optimiert und auf eine Serie der Fettsäurevinylester von Butanoat bis Stearat für DS-Werte bis zu 2,2-2,6 angewandt werden. Möglich war somit eine systematische Studie unter Variation der veresterten Fettsäure sowie des Substitutionsgrades (DS). Sämtliche Produkte mit einem DS ab 1,5 wiesen eine ausgprägte Löslichkeit in organischen Lösungsmitteln auf wodurch sowohl die Aufnahme von NMR-Spektren als auch Molmassenbestimmung mittels Größenausschlusschromatographie mit gekoppelter Mehrwinkel-Laserlichtstreuung (GPC-MALLS) möglich waren. Durch dynamische Lichtstreuung (DLS) wurde das Löslichkeitsverhalten veranschaulicht. Sämtliche Produkte konnten zu Filmen verarbeitet werden, wobei Materialien mit DS 1,5-1,7 hohe Zugfestigkeiten (bis zu 42 MPa) und Elastizitätsmodule (bis 1390 MPa) aufwiesen. Insbesondere Stärkehexanoat mit DS <2 sowie Stärkebutanoat mit DS >2 hatten ein mechanisches Eigenschaftsprofil, welches insbesondere in Bezug auf die Festigkeit/Steifigkeit vergleichbar mit Verpackungsmaterialien wie Polyethylen war (Zugfestigkeit: 15-32 MPa, E-Modul: 300-1300 MPa). Zugfestigkeit und Elastizitätsmodul nahmen mit steigender Kettenlänge der veresterten Fettsäure ab. Ester längerkettiger Fettsäuren (C16-C18) waren spröde. Über Weitwinkel-Röntgenstreuung (WAXS) und Infrarotspektroskopie (ATR-FTIR) konnte der Verlauf der Festigkeiten mit einer zunehmenden Distanz der Stärke im Material begründet werden. Es konnten von DS und Kettenlänge abhängige Glasübergänge detektiert werden, die kristallinen Strukturen der langkettigen Fettsäuren zeigten einen Schmelzpeak. Die Hydrophobie der Filme wurde anhand von Kontaktwinkeln >95° gegen Wasser dargestellt. Blends mit biobasierten Polyterpenen sowie den in der Arbeit hergestellten Zein-Acylderivaten ermöglichten eine weitere Verbesserung der Zugfestigkeit bzw. des Elastizitätsmoduls hochsubstituierter Produkte. Eine thermoplastische Verarbeitung mittels Spritzgießen war sowohl für Produkte mit hohem als auch mittlerem DS-Wert ohne jeglichen Zusatz von Weichmachern möglich. Es entstanden homogene, transparente Prüfstäbe. Untersuchungen der Härte ergaben auch hier für Stärkehexanoat und –butanoat mit Polyethylen vergleichbare Werte. Ausgewählte Produkte wurden zu Fasern nach dem Schmelzspinnverfahren verarbeitet. Hierbei wurden insbesondere für hochsubstituierte Derivate homogenen Fasern erstellt, welche im Vergleich zur Gießfolie signifikant höhere Zugfestigkeiten aufwiesen. Stärkeester mit mittlerem DS ließen sich ebenfalls verarbeiten. Zunächst wurden für eine Übertragung des Konzeptes auf die Proteine Zein und WPI verschiedene Synthesemethoden verglichen. Die Veresterung mit Säurechloriden ergab hierbei die höchsten Werte. Im Hinblick auf eine gute Löslichkeit in organischen Lösungsmitteln wurde für WPI die Veresterung mit carbonyldiimidazol (CDI)-aktivierten Fettsäuren in DMSO und für Zein die Veresterung mit Säu-rechloriden in Pyridin bevorzugt. Es stellte sich heraus, dass acyliertes WPI zwar hydrophob, jedoch ohne Weichmacher nicht thermoplastisch verarbeitet werden konnte. Die Erstellung von Gießfolien führte zu Sprödbruchverhalten. Unter Zugabe der biobasierten Ölsäure wurde die Anwendung von acyliertem WPI als thermoplastischer Filler z. B. in Blends mit Stärkeestern dargestellt. Im Gegensatz hierzu zeigte acyliertes Zein Glasübergänge <100 °C bei ausreichender Stabilität (150-200 °C). Zeinoleat konnte ohne Weichmacher zu einer transparenten Gießfolie verarbeitet werden. Sämtliche Derivate erwiesen sich als ausgeprägt hydrophob. Zeinoleat konnte über das Schmelzspinnverfahren zu thermoplastischen Fasern verarbeitet werden.
In recent years, a steadily growing production capacity of bioplastic based on renewable resources was noticed. Despite its huge production capacities and an appropriate property profile (ubiquitous occurrence, easy extraction), starch is only applied in addition of plasticizers in a hydrophilic, thermoplastic form in blends with e. g. polyesters. The same applies to bioplastics based on proteins. The actual study has the aim to develop starch-based bioplastics, which are hydrophobic, thermoplastic without the addition of any plasticizer and have mechanical properties to be a suitable alternative material in the area of food packaging. To obtain a variation of the raw materials for bioplastics, the concept shall be applied to two types of industrial available proteins, whey protein isolate (WPI) and Zein. Fatty acid esters of starch came out to be a suitable class of materials. Initially, the methods of esterifying acid chlorides and the transesterification of fatty acid vinyl esters were compared with the latter being more appropriate. Reaction parameters of this method were optimized and it was applied to a complete series of vinyl ester reagents (butanoate to stearate), leading to degree of substitution (DS)-values up to 2.2-2.6. With that, a systematic study of the variation of the fatty acid ester chain as well as the DS became possible. It came out that all products with a DS >1.5 showed a well-marked solubility in organic solvents, whereby solution NMR-studies as well as measurements of the molecular weight distributions by using size exclusion chroma-tography with multi-angle laser light scattering (SEC-MALLS) were possible. The different solution behavior was studied by dynamic light scattering (DLS). All soluble products could be formed into films via casting, where materials with a DS of 1.5-1.7 showed the highest values concerning tensile strength (up to 42 MPa) and Youngs modulus (up to 1390 MPa). Especially starch hexanoate with DS <2 and starch butanoate with a DS >2 revealed mechanical properties which are comparable to usually applied polymers for food packaging, e. g. polyethylene (tensile strength: 15-20 MPa, E-Mod: 300-1300 MPa). Tensile strength and Youngs modulus were reduced with increasing length of the esterified fatty acid. Wide-angle X-Ray scattering (WAXS) and infrared spectroscopy (ATR-FTIR) explained this tendency by an increasing intermolecular distance of the starch in the material. Glassy transitions of the materials were detected and showed a dependency on the type of esterified fatty acid and the DS. The crystalline structures of the esterified long-chain fatty acids revealed a melting peak. All films came out to be hydrophobic with contact angles against water >95°. The tensile strength and the Youngs modulus of the highly substituted products could be further improved by blending them with biobased polyterpenes as well as the acylated Zein. A thermoplastic processing without the use of any plasticizer additives was possible for products with a medium and high DS. Homogeneous, transparent testing specimens were obtained. The specific mechanical values were comparable with the casted films, although the highest values for the tensile strength and the elongation were lower. Investigations of the hardness showed comparable values to polyethylene. Selected samples were further processed to fibers by melt spinning. Especially starch esters with high DS revealed homogeneous fibers with a significant increase in the tensile strength compared to the film or testing specimen. Even fatty acid starch esters with a medium DS were processed by the melt-spinning, but their higher glassy transition lead to a reduced softening behavior. To transfer this concept to the class of proteins, different methods of synthesis were studied in the first step, which differed in their amount of acylation. The acylation using fatty acid chlorides lead to highest values. With regard to a well-marked organic solvent solubility, in the case of WPI the acylation with carbonyldiimidazol (CDI)-activated fatty acid was established. For Zein, the acid chloride acylation in pyridine gave the desired results. It came out the fatty acid acylated soluble WPI could not be thermoplastic processed without additional plasticizers. By using biobased oleic acid as additive, the potential of acylated WPI as a thermoplastic filler in blends with e. g. fatty acid esters of starch was shown. In contrast, fatty acid acyl derivatives of Zein revealed well marked glassy transitions <100 °C with an adequate thermal stability. While Zeinoleate could be formed into transparent films via solvent casting without any plasticizer additives, low amounts of tall oil enabled film-forming in the case of acyl derivatives with shorter fatty acids as well. All derivatives revealed a well-marked hydrophobicity. Finally, Zeinoleate was thermoplastically processed into fibers by melt-spinning without any further additives.

APA, Harvard, Vancouver, ISO, and other styles

10

Bergel, Bruno Felipe. "Espumas de amido termoplástico com recobrimentos de quitosana e poliácido láctico." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/158326.

Full text

Abstract:

Embalagens de plástico expandido são utilizados como embalagens de alimentos, entre eles o poliestireno expandido (EPS). Suas principais características são a leveza e sua não biodegradabilidade. Estas embalagens geralmente são descartadas logo após o uso e geram grandes quantidades de resíduos. Espumas feitas a base de amido termoplástico (TPS) podem substituir o EPS nestes casos, pois são feitas a partir de fontes renováveis e são materiais biodegradáveis. Entretanto, embalagens de espuma TPS possuem grande afinidade pela água e isso consequentemente afeta seu uso. Uma forma de resolver este problema é recobrir estas espumas TPS com um material mais hidrofóbico, dificultando o contato da água com o amido. Nesse sentido, o objetivo deste trabalho foi desenvolver espumas de TPS de diferentes amidos e revesti-las com quitosana e poliácido láctico (PLA), pois também são materiais biodegradáveis e são menos hidrofílicos do que o amido. Três fontes de amido (batata, mandioca e milho) foram analisadas conjuntamente para produzir espumas TPS com propriedades mais desejáveis para embalagens. As espumas foram produzidas a partir de amido, glicerol e água nas proporções mássicas de 62/5/33, respectivamente. Dentre os tipos de amido escolhidos, a espuma TPS de milho mostrou ser mais densa e rígida, apresentando maior densidade e maior módulo elástico (0,20 g/cm3 e 106 MPa, respectivamente) em comparação com espumas TPS de batata (0,11 g/cm3 e 39 MPa) e mandioca (0,10 g/cm3 e 39 MPa). A espuma TPS de batata apresentou maior flexibilidade e resistência ao impacto, e devido a estas vantagens é a mais adequada ao uso em embalagens. Os recobrimentos de quitosana e PLA diminuíram a absorção de água da espuma TPS. Enquanto que a espuma sem recobrimento absorveu aproximadamente 280% do seu peso em água, espumas TPS com 6% m/v de quitosana absorveram 100% e espumas TPS com 6% m/v de PLA absorveram 50% em média. O PLA mostrou ser a melhor opção de recobrimento para as espumas pois apresentou os menores valores de absorção de água e aumentou as propriedades mecânicas da espuma.
The expanded polystyrene (EPS) is used in a variety of food packaging, mainly in packages whose characteristics is the single use. These packages are usually discarded soon and generate large amounts of waste. Thermoplastic starch (TPS) foams can replace the EPS in these cases, because it comes from renewable and biodegradable sources. However, starch packaging has great affinity for water and it affects its use. One way to solve this problem is to cover the TPS foam with a more hydrophobic material, hindering the contact of water with starch. In this work, chitosan and polylactic acid (PLA) were used as coatings, as they are also biodegradable materials and are more hydrophobic than starch. Three sources of starch (potato, cassava and corn) were analyzed conjointly to produce TPS foams with more desirable properties for packaging. The foams were made from starch, glycerol and water in the proportion of 62/5/33 (% m/m) respectively. Among the starch types used, corn TPS foam presented higher density and higher stiffness (0,20 g/cm3 and 106 MPa, respectively) compared to potato (0,11 g/cm3 and 39 MPa) and cassava (0,10 g/cm3 e 39 MPa) TPS foams. The potato TPS foam showed greater flexibility and impact resistance, and due to these advantages is the most suitable for use in packaging. The chitosan and PLA coatings decreased the water absorption of the TPS foam. While the uncoated TPS foam absorbed approximately 280% of its weight in water, TPS foams with 6% w/v chitosan absorbed 100% and TPS foams with 6% m / v PLA absorbed 50% on average. The PLA was found to be the best option for coating the TPS foams because presented the lowest water absorption values and increased the mechanical properties of the foams.

APA, Harvard, Vancouver, ISO, and other styles

More sources

Books on the topic "Thermoplastic starch"

1

L. P. B. M. Janssen and Leszek Moscicki. Thermoplastic starch: A green material for various industries. Weinheim: Wiley-VCH, 2009.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

2

Janssen, Leon P. B. M., and Leszek Moscicki, eds. Thermoplastic Starch. Wiley, 2009. http://dx.doi.org/10.1002/9783527628216.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Thermoplastic starch"

1

Mitrus, Marcin, and Leszek Mościcki. "Thermoplastic Starch." In Extrusion-Cooking Techniques, 177–90. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2011. http://dx.doi.org/10.1002/9783527634088.ch14.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Tomka, I. "Thermoplastic Starch." In Advances in Experimental Medicine and Biology, 627–37. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4899-0664-9_34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Lawton, John W. "Biodegradable Coatings for Thermoplastic Starch." In Cereals, 43–47. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4757-2675-6_6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

de Carvalho, Antonio José Felix, and Eliane Trovatti. "Biomedical Applications for Thermoplastic Starch." In Biodegradable and Biobased Polymers for Environmental and Biomedical Applications, 1–23. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119117360.ch1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Willett, J. L., B. K. Jasberg, and C. L. Swanson. "Melt Rheology of Thermoplastic Starch." In ACS Symposium Series, 50–68. Washington, DC: American Chemical Society, 1994. http://dx.doi.org/10.1021/bk-1994-0575.ch003.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Jumaidin, R., S. M. Sapuan, and M. R. Ishak. "Thermoplastic Sugar Palm Starch Composites." In Sugar Palm Biofibers, Biopolymers, and Biocomposites, 165–88. First edition. | Boca Raton, FL : CRC Press/Taylor & Francis Group, 2018.: CRC Press, 2018. http://dx.doi.org/10.1201/9780429443923-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Van Tuil, Robert, Jaap Van Heemst, and Gerald Schennink. "Potato Starch Based Resilient Thermoplastic Foams." In Biorelated Polymers, 3–17. Boston, MA: Springer US, 2001. http://dx.doi.org/10.1007/978-1-4757-3374-7_1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Chaleat, C. M., M. Nikolic, R. W. Truss, I. Tan, S. A. McGlashan, and P. J. Halley. "Thermoplastic Starch Polymer Blends and Nanocomposites." In ACS Symposium Series, 323–34. Washington, DC: American Chemical Society, 2012. http://dx.doi.org/10.1021/bk-2012-1105.ch019.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Rodríguez Cueto, Y., S. M. Montemayor, F. J. Rodríguez González, and M. Mondragón Chaparro. "High Performance Thermoplastic Starch/Vermiculite Bionanocomposites." In Green-Based Nanocomposite Materials and Applications, 81–99. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-18428-4_5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Halley, Peter J., Rowan W. Truss, Martin G. Markotsis, Celine Chaleat, Melissa Russo, Anna Lisa Sargent, Ihwa Tan, and Peter A. Sopade. "A Review of Biodegradable Thermoplastic Starch Polymers." In ACS Symposium Series, 287–300. Washington, DC: American Chemical Society, 2007. http://dx.doi.org/10.1021/bk-2007-0978.ch024.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Thermoplastic starch"

1

Hamid, Nur Faezah, Mohd Hazim Mohamad Amini, Mohamad Bashree Abu Bakar, Siti Nur Liyana Mamaoud, Nurul Syuhada Sulaiman, and Mohamad Najmi Masri. "Characterization of starch thermoplastic based on glutardialdehyde modified starch." In MATERIALS CHARACTERIZATION USING X-RAYS AND RELATED TECHNIQUES. Author(s), 2019. http://dx.doi.org/10.1063/1.5089330.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Can, Buse Nur, and Guralp Ozkoc. "PBAT/thermoplastic starch blends: “Effects of oxidized starch and compatibilizer content”." In PROCEEDINGS OF PPS-32: The 32nd International Conference of the Polymer Processing Society - Conference Papers. Author(s), 2017. http://dx.doi.org/10.1063/1.5016731.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Fričová, Oľga, Mária Hutníková, and Hamed Peidayesh. "DMA study of thermoplastic starch/montmorillonite nanocomposites." In APPLIED PHYSICS OF CONDENSED MATTER (APCOM 2021). AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0067007.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Sheng, Lai Di, Sinar Arzuria Adnan, Azlin Fazlina Osman, Midhat Nabil Ahmad Salimi, Ismail Ibrahim, and Nazrul Haq. "Thermoplastic starch biocomposites with cellulose and bentonite fillers." In PROCEEDINGS OF GREEN DESIGN AND MANUFACTURE 2020. AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0044613.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Szegda, D., J. Song, M. K. Warby, and J. R. Whiteman. "Computational modelling of a thermoforming process for thermoplastic starch." In MATERIALS PROCESSING AND DESIGN; Modeling, Simulation and Applications; NUMIFORM '07; Proceedings of the 9th International Conference on Numerical Methods in Industrial Forming Processes. AIP, 2007. http://dx.doi.org/10.1063/1.2740788.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Fornes, F., L. Sánchez-Nácher, O. Fenollar, T. Boronat, D. Garcia-Sanoguera, A. D’Amore, Domenico Acierno, and Luigi Grassia. "Mechanical properties of green composites based on thermoplastic starch." In V INTERNATIONAL CONFERENCE ON TIMES OF POLYMERS (TOP) AND COMPOSITES. AIP, 2010. http://dx.doi.org/10.1063/1.3455625.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Schlemmer, D., M. J. A. Sales, Alberto D’Amore, Domenico Acierno, and Luigi Grassia. "THERMOPLASTIC STARCH FILMS WITH VEGETABLE OILS OF BRAZILIAN CERRADO." In IV INTERNATIONAL CONFERENCE TIMES OF POLYMERS (TOP) AND COMPOSITES. AIP, 2008. http://dx.doi.org/10.1063/1.2989073.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Sousa, Fabiula Danielli Bastos de, and Danilo Justino Carastan. "Reinforced polymer blends composed of coffee capsules/thermoplastic starch." In PROCEEDINGS OF THE 37TH INTERNATIONAL CONFERENCE OF THE POLYMER PROCESSING SOCIETY (PPS-37). AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0168591.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Ondriš, Leoš, Mária Hutníková, Ľuboš Popovič, Hamed Peidayesh, and Oľga Fričová. "XRD and DMA study of thermoplastic starch-based nanocomposites." In APPLIED PHYSICS OF CONDENSED MATTER (APCOM2023). AIP Publishing, 2024. http://dx.doi.org/10.1063/5.0187435.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Sheng, Lai Di, Sinar Arzuria Adnan, Azlin Fazlina Osman, and Ismail Ibrahim. "Enhancement of thermoplastic starch for packaging applications: A review." In INTERNATIONAL CONFERENCE ON INNOVATION IN MECHANICAL AND CIVIL ENGINEERING (i-MACE 2022). AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0148694.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!