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Dissertations / Theses on the topic 'Polylactic acid composite'

Author: Grafiati
Published: 4 June 2025
Last updated: 1 August 2025

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1

Jia, Weiwei. "Polylactic acid fibre reinforced biodegradable composites." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/polylactic-acid-fibre-reinforced-biodegradable-composites(732904c8-584b-4fbb-b68a-3cf14dc84e9f).html.

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Polylactic acid (PLA) is a well-known biodegradable and sustainable polymer, derived from renewable agricultural sources. Its high price in the past limited its applications to mainly biomedical materials such as bone fixation devices. As the growth of awareness in global environment protection and sustainable development, PLA has attracted increased attention and development. Nowadays, the applications of PLA have been broadened into plastics, textiles and composites etc. Composites have been widely used in industrial applications for several decades, due to their high strength-to-weight rati
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2

Mustafa, Zaleha Binti. "Multiaxial fatigue characterization of self-reinforced polylactic acid-calcium phosphate composite." Thesis, University of Glasgow, 2013. http://theses.gla.ac.uk/3876/.

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The majority of failures of mechanical components are caused by fatigue. Unlike many conventional engineering components, implants in the body are subjected to complex multidirectional loading patterns, thus fatigue not only occurs under axial, fully or partly reversed loading, but also under torsional loading. The fatigue behaviours of self-reinforced poly lactide composite (PLA) of unidirectional PLA fibres in PLA matrix containing tricalcium phosphates (TCP), (PLA-PLA-TCP) produced via pre-pregging technique has been investigated. Quasi-static test results indicated that PLA-PLA-TCP is stro
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3

Morvan, Jason. "HIGHLY PIEZOELECTRIC SOFT COMPOSITE FIBERS." Kent State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=kent1334585220.

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4

Herrera, Vargas Natalia. "Processing and properties of nanocomposites based on polylactic acid, chitin and cellulose." Doctoral thesis, Luleå tekniska universitet, Materialvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-64863.

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The production of bio-based and biodegradable nanocomposites has gained attention during recent years for environmental reasons; however, the large-scale production of these nanocomposites still poses challenges. The objective of this work has been to prepare bio-based and biodegradable nanocomposites via liquid-assisted extrusion and to gain a deeper understanding of the process and the relationship between the process, composition, structure and properties. Extrusion is a common industrial process and thus, the development of this technique for the preparation of bionanocomposites can promot
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5

Talal, Ahmed. "Investigation of the application of polylactic acid-calcium phosphate composite materials as novel periodontal barrier membranes." Thesis, University of Glasgow, 2009. http://theses.gla.ac.uk/1223/.

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The ultimate aim of periodontal treatment is to regenerate the tissue lost during the disease process, thereby restoring the aesthetics and function of the periodontium. Guided tissue regeneration (GTR) is one technique that is used clinically to promote tissue regeneration. The technique employs a membrane to create space in the appropriate surgical site to produce periodontal regeneration. However there may be considerable potential to improve the outcomes of this technique by development of novel membrane materials. The aim of the studies described in this thesis was to investigate the pote
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Gissentaner, Tremaine D. "Development of Conductive Green Polymer Nano-Composite for use in Construction of Transportation Infrastructure." Ohio University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1408697877.

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7

Hosseini, Moghadam Seyed Mazdak, and Mohamed Alshihabi. "Mechanical behavior of a bio-based composite : influences of production conditions." Thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-57314.

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Some mechanical properties of DuraPulp, a bio-based, bio-degradable composite made from polylactic acid (PLA) and pulp fibers, were determined. Focus was put on the conditions during productions whereby three different press times were studied. Additionally, two different material compositions (PLA to fiber ratios) were used. Uniaxial tensile tests with two different load rates, one and 50 mm/min, were performed. An increase in maximum strength and E-modulus of DuraPulp was observed by increasing the press time, while PLA content decreased the maximum strength and E modulus.
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Gren, Bernhäll Oscar, and Adam Nilsson. "Bestämning av mekaniskaegenskaper för ett bio-kompositmaterial." Thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-68998.

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The purpose of the work is the determination of flexural properties for thebiocomposite Durapulp. The study includes laborative tests on Durapulp andreference materials, commonly used in the building sector. Stiffness and strength of Durapulp show that it has the potential as a replacement for conventional wood-based materials.
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9

Prajer, Marek. "Interface morphology in polylactic acid-sisal fibre composites." Thesis, University of Bath, 2011. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.545339.

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10

Teymoorzadeh, Hedieh. "Composites and foams based on polylactic acid (PLA)." Doctoral thesis, Université Laval, 2016. http://hdl.handle.net/20.500.11794/27075.

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Cette étude est destinée à la production et à la caractérisation des composites d'acide polylactique (PLA) et des fibres naturelles (lin, poudre de bois). Le moussage du PLA et ses composites ont également été étudiés afin d'évaluer les effets des conditions de moulage par injection et du renfort sur les propriétés finales de ces matériaux. Dans la première partie, les composites constitués de PLA et des fibres de lin ont été produits par extrusion suivit par un moulage en injection. L'effet de la variation du taux de charge (15, 25 et 40% en poids) sur les caractéristiques morphologique, méca
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11

Ginsac, Nathalie. "Caractérisation de matériaux composite polyacide lactique-bioverre pour application dans la réparation osseuse." Phd thesis, INSA de Lyon, 2011. http://tel.archives-ouvertes.fr/tel-00668698.

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Ce travail de thèse porte sur la caractérisation d'un matériau composite polyacide lactique-bioverre pour application comme dispositif de réparation osseuse. Le bioverre étant trop fragile pour être utilisé seul comme dispositif de réparation osseuse, celui-ci est associé à une matrice polymère résorbable permettant d'apporter le caractère bioactif à des matériaux pouvant être mis en forme par des procédés de plasturgie. Le matériau composite polyacide lactique-bioverre est ainsi mis en forme par injection à partir de granules élaborés par voie solvant. La caractérisation des propriétés de ce
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Perera, Madhavie S. "The use of sorbitol-initiated polylactic acid as a coupling agent in resorbable phosphate glass fibre reinforced polylactic acid composites." Thesis, University of Nottingham, 2015. http://eprints.nottingham.ac.uk/30445/.

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Resorbable phosphate glass fibre (PGF) reinforced polymer composites have been investigated for use as fracture fixation plates. While demonstrating impressive initial properties, these composites have shown poor retention of mechanical properties after immersion in a hydrolytic environment. Existing commercially available coupling agents for conventional glass composites have been of limited value and so novel coupling agents have been created specifically for PGF/ Poly (lactide) composites. Previous work on sorbitol-initiated poly (lactide) (S-PLA) oligomers has shown potential both in singl
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13

Kriel, Haydn. "Polylactic acid core-shell fibres by coaxial electrospinning." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/4289.

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Thesis (MSc (Chemistry and Polymer Science))--University of Stellenbosch, 2010.<br>ENGLISH ABSTRACT: The work presented in this dissertation describes the use of coaxial electrospinning of two miscible polymer solutions in the preparation of core-shell fibres with a semicrystalline core of poly(L-lactic acid) and an amorphous shell of poly(D,L-lactic acid). Additionally it describes using these fibres in the production of single polymer composite yarns and films. These materials can potentially be used in applications that require biodegradable and fibre-reinforced composite materials e.
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14

Dergham, Nora. "Mise en oeuvre de biocomposites Poly(acide lactique)/Bioverres : Relation structure/ rhéologie/procédés de mise en forme." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0086.

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Le travail présenté porte sur la rhéologie, la mise en forme et la caractérisation de matériaux biocomposites de nouvelles générations pour des applications orthopédiques. Dans le cadre de cette étude, des biocomposites poly (D,L-lactide) (PDLLA)/bioverres ont été élaborés par extrusion bivis sous atmosphère inerte. Les bioverres différent par la nature de leur traitement thermique et leur morphologie. La première partie a été consacrée à l’étude de l’état de la dispersion des bioverres dans la matrice polymère. Nous avons montré que l’homogénéité de cette dispersion dépend, d’une part de la s
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15

Oka, Mihir Anil. "PLA and cellulose based degradable polymer composites." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/33829.

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We studied PLA-microcrystalline cellulose composites, focusing on the effects of processing, particle size and surface modification. The thermal and mechanical properties of these PLA based composites were studied and the effect of cellulose addition on PLA degradation was analyzed. For our system, the degradation rate was found to depend on initial sample crystallinity, pH of the degradation media and cellulose content of the composite. Composites were prepared using solution processing and melt mixing methods. The processing methods influenced the polymer's ability to crystallize affecting t
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16

Karamanlioglu, Mehlika. "Environmental degradation of the compostable plastic packaging material poly(lactic) acid and its impact on fungal communities in compost." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/environmental-degradation-of-the-compostable-plastic-packaging-material-polylactic-acid-and-its-impact-on-fungal-communities-in-compost(6caccf89-2f88-461c-999b-8d89c6be67e9).html.

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Conventional plastics have been used for decades in a diverse range of applications, however, many are resistant to degradation, leading to environmental pollution and their manufacture is dependent on non-renewable fossil fuels. Therefore, there has been an increasing need for eco-friendly biodegradable materials from renewable resources. Poly(lactic acid) (PLA) is a compostable polyester with a hydrolysable backbone that is susceptible to biodegradation and produced from renewable feedstocks. PLA has mechanical qualities comparable to non-biodegradable plastics, and currently is commercializ
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17

Tanpichai, Supachok. "Micromechanics of microfibrillated cellulose reinforced poly(lactic acid) composites using Raman spectroscopy." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/micromechanics-of-microfibrillated-cellulose-reinforced-polylactic-acid-composites-using-raman-spectroscopy(51fc47fa-fcb4-43cd-accc-3c559b5a0a2e).html.

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Microfibrillated cellulose (MFC) is an alternative material that has been widely studied to enhance the mechanical properties of a polymer matrix due to a number of perceived advantages over traditional plant fibre forms. Mechanical properties of MFC networks were found to depend on parameters such as the modulus of fibrils, bonding strength, porosity, degree of crystallinity, contact area of fibrils and possibly the modulus of the cellulose crystals of the raw materials (cellulose I or II). Even though the longer processing time used to produce MFC was found to yield networks with fewer fibre
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18

Vodička, Juraj. "Biodegradace bioplastů v prostředí kompostu." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2020. http://www.nusl.cz/ntk/nusl-413729.

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This master’s thesis focuses on biodegradation of polyhydroxybutyrate (PHB) and polylactic acid (PLA). The theoretical part discusses an origin, properties and applications of investigated biopolyesters, and so the enzymology of their biodegradation. The experimental part deals with biodegradation of these polymers in liquid medium using several pure thermophilic bacteial strains and controlled composting of these bioplastics. Amongst six tested thermophilic bacterial strains only one showed PHB-biodegradation activity – strain Schlegelella thermodepolymerans. No degradation degree of amorphou
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19

Al-Darwash, Mustafa, and Emanuel Nuss. "Mechanical characterization of DuraPulp by means of micromechanical modelling." Thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-43732.

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Södra DuraPulp is a relatively new eco-composite, made from natural wood fibers and polylactic acid (PLA), which comes from corn starch. Until now, there are only few applications for DuraPulp, mainly in the area of design. To find new fields of application, more knowledge about its mechanical material properties are of great interest.This study deals with characterizing the mechanical properties of DuraPulp in an analytical way by means of micromechanical modelling and evaluation with help of Matlab. The mechanical properties for PLA were taken from scientific literature. Not all properties o
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20

Doumbia, Awa Soronfe. "Développement de filaments nanocomposites à base de polylactide « PLA » : application aux textiles antibactériens." Thesis, Lille 1, 2012. http://www.theses.fr/2012LIL10059/document.

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Ce travail de thèse se place dans le contexte de la valorisation du polylactide (PLA), un polymère issu de ressources renouvelables, dans le secteur des textiles techniques. Ainsi, de nouveaux filaments nanocomposites ont été élaborés par filage en voie fondue suivi d’un étirage, un procédé facile à mettre en œuvre en milieu industriel et exempt d’utilisation de solvants. Les charges utilisées sont les nanoparticules d’oxyde de zinc (ZnO) et d’argent (Ag) largement utilisées pour apporter des propriétés antibactériennes aux matériaux. De plus, ils sont non toxiques pour les cellules mammifères
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21

Soccalingame, Lata. "Étude des scénarios de fin de vie des biocomposites : vieillissement et retransformation de biocomposites PP/farine de bois et PLA/fibres de lin." Thesis, Montpellier 2, 2014. http://www.theses.fr/2014MON20082/document.

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Les matériaux biocomposites, en particulier les composites matrice thermoplastique biosourcée ou non renforcée de charges ou de fibres végétales, connaissent actuellement un essor significatif et présentent pour l'avenir un gisement grandissant de matières en fin de vie. En conséquence, l'étude du comportement de ces matériaux au regard de différents scénarios de fin de vie que sont le recyclage mécanique, le compostage et l'incinération constitue un enjeu scientifique et technologique important. Le premier objectif de cette thèse est d'étudier la fin de vie par retransformation (cycles succes
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Hollá, Tereza. "Kompostování biologicky rozložitelných biopolymerů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2021. http://www.nusl.cz/ntk/nusl-449418.

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This master’s thesis deals with the study of composting of polyhydroxybutyrate (PHB) and polylactic acid (PLA). The experimental part focuses on the composting test based on the IS/ISO 20200 standard, in which biopolymers were degraded within 8 weeks. The advantage of the composting test was the unique use of bags for polymer granules, which simplified the handling of samples. The placement of the polymers ensured an even load of compost, which simulated the landfill environment, which also made this experiment exceptional. The use of different methods of analysis ensured the investigation of
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23

Walha, Fatma. "Elaboration de mélanges à base de Bio-polymères : Etude des corrélations entre structure, propriétés et transformation." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI075.

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Cette étude est une contribution à la mise au point d’un nouveau matériau filmogène multiphasique, originaire de ressources naturelles et destiné à l’emballage alimentaire. La voie proposée consiste à élaborer un mélange poly (acide lactique) [PLA]/ polyamide 11 [PA11] à différentes compositions; le principal avantage étant d’offrir un éventail de propriétés difficile à réunir sur un même polymère. Les différentes formulations, PLA/PA11, élaborées à l’état fondu dans une extrudeuse bivis ont été étudiés du point de vue des propriétés rhéologiques, thermique, mécanique et de la morphologie. Dif
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貴保, 藤浦, та Takayasu Fujiura. "天然長繊維強化熱可塑性生分解樹脂複合材料における成形プロセス最適化に関する研究". Thesis, https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB12936621/?lang=0, 2015. https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB12936621/?lang=0.

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従来型の繊維強化プラスチック(FRP)に対し環境負荷の少ない「グリーンコンポジット」の実用的な成形プロセスの確立が切望されている。本研究では、天然繊維およびポリ乳酸を原料とする長繊維強化樹脂(LFT)ペレット製造および射出成形による複合材製造法を対象に、複合材の力学的特性に対する繊維の含有水分や熱劣化の影響、繊維分散の効果等を把握し、高い特性を発揮させるための成形プロセスおよび諸条件を提示した。<br>'Green Composites' have been attracting attention due to their high sustainability and carbon neutrality. This study investigated the preparation process for composites of long jute fiber reinforced polylactic acid by LFT-pellet manufacturing method followed by injection molding. The author explored effect of several factors, such as moisture in fiber, heat decomposition of fiber at processing
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Tung, Yu-Chieh, and 董宇傑. "Polylactic Acid Antimicrobial Composite Films:Preparation and Antibacterial Efficacy." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/66082866229803025598.

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碩士<br>逢甲大學<br>纖維與複合材料學系<br>104<br>Organic polymer antibacterial agents exhibit good antibacterial properties and high durability, and they have the advantage of efficient processing, which allows for applications in costumes, medicine, and food packaging. In this study, free radical polymerization (FRP) is used to form antibacterial polymer materials. FRP is a living radical polymerization technique which can manipulate parameters for the preparation of polymer materials in terms of molecular weight and structure. A monomer {2-(tert-butylaminoethyl)meth-acrylate (TA)} is made into cationic ant
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Hsieh, Ming-Hsiu, and 謝明修. "Toughness of Polylactic Acid by the Composite Rubber Particles." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/72827104336108558247.

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碩士<br>南台科技大學<br>化學工程與材枓工程系<br>98<br>Although poly(lactic acid)(PLA) can be greatly toughened by melt blending of the matrix with various amounts of Poly(butyl acrylate–co–divinylbenzene)/ Poly(glycidyl methacrylate) (BD0.3-G5) and Poly(methyl acrylate) (PMA) rubber particles. This paper discusses the tensile mechanical properties and PLA matrix – rubber particles interactions by tensile testing of the samples was carried out according to ASTM Standard D638-08. The tensile test showed that PLA gives a high elongation at break of 222% with 5wt% BD0.3-G5 rubber particles, while the tensile modulu
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Huang, Sheng-Yu, and 黃勝佑. "A Study of Rice Husk Reinforced Polylactic Acid Composite." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/90348104170469164066.

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碩士<br>國立宜蘭大學<br>化學工程與材料工程學系碩士班<br>100<br>Mostly rice husk waste had been discarded or combustion which caused environmental pollution, productions capacity were thousands of tons of rice husk had been produced every year in Taiwan. Therefore, how to reduce the waste is a top issue, in turn reducing the improper handling of the impact on the environment, resulting into the reusable resource is experimental study to investigate direction. There were two pants in this study , one of them was , using the different content of the NaOH and GPS to modified the rice husk interface , and then the modif
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Yang, Lee Yi, and 李易洋. "Polylactic acid / rice husk powder preparation and Properties of composite." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/81487825047509965237.

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碩士<br>亞東技術學院<br>應用科技研究所<br>101<br>In this study, the use of biodegradable material polylactic acid (PLA) the common blended with Rice husk powder, I hope to reduce the utilization rate of the PLA material itself, PLA blended with Rice husk powder weight ratio of 90:10,80:20,70:30,60:40,50:50 hope to make the polymer strength can be improved, but the tensile strength test phase separation between the interface poly of Poly Lactic Acid <PLA> Rice husk powder.Incorporation Maleic Anhydride (MAH), Dicapryl Phthalate (DCP), in different formulations of the degree of strengthening is also different
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YU, TZU-CHING, and 于子晴. "Study on Composite Materials of Polylactic Acid with Calcium Carbonate." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/556a82.

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碩士<br>國立臺北科技大學<br>化學工程與生物科技系化學工程碩士班<br>107<br>(Polylactic acid, PAL)∕(Calcium carbonate, CaCO3) composites were prepared by melt blending technology. According to different addition amounts (2%, 4%, 6%, 8%, 10%), the results were analyzed by TGA, DSC, DMA, SEM XRD and POM. The purpose of the research is to reduce the cost of the product, improve the mechanical properties, thermal properties, crystallinity, tensile and hardness observations and explore its changes. The results show that the thermal properties are detected by TGA and DSC. The thermal cracking temperature decreases with the in
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Li, Yu-Ju, and 李育儒. "Preparation and Properties of Electrospun Chitosan / Polylactic acid Composite nanofibrous mats." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/u2pbru.

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HUANG, ZHONG-DE, and 黃仲德. "Study on Composite Materials of Polylactic acid Add with Titanium Dioxide." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/8y6v7p.

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碩士<br>國立臺北科技大學<br>化學工程與生物科技系化學工程碩士班<br>107<br>Polylactic acid has been widely used in various fields, in which packaging materials are the largest field of use, but polylactic acid is hard and brittle in nature and has poor elasticity, so many products are limited by this property. Therefore, this experiment uses inorganic material P25 nano titanium dioxide and anatase type nano titanium dioxide to be added to polylactic acid, by adding nano titanium dioxide powder as a nucleating agent, and utilizing nano titanium dioxide to absorb ultraviolet light properties, improve Polylactic acid composi
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Lin, Meng-Yu, and 林孟昱. "Research on developing composite materials consisting of polylactic acid (PLA) and chitosan." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/18119966829654770882.

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碩士<br>國立嘉義大學<br>食品科學系研究所<br>97<br>Biodegradable blend films based on polylactic acid and chitosan with various compositions were researched. While all the ingredients are biodegradable, hydrophobic PLA possesses good mechanical and chemical properties, chitosan exerts various bioactivities including antimicrobial functionality and starch exalts the aptitude of decomposition. Solvent blending/casting process was used to manufacture the films fabricated with PLA and chitosan. Because of the rigidity of PLA, polyethylene glycol, a modifying agent for the composite film to maintain the hydrophilic
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Chen, Yen-Chih, and 陳彥志. "Polylactic acid / calcium sulfate composite in bone tissue engineering – a biomechanics and cytocompatibility analysis." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/02120409590745872476.

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碩士<br>臺北醫學大學<br>生醫材料暨工程研究所<br>97<br>In the early stage of the load-bearing bone defect treatment, the bone can not bearing the physical load as before. The surgeon needs to implant an additional fixation system or autograft to restore the stability in the defect area. The traditional implant may induce osteoporosis in the adjacent bone because the stainless steel with high stiffness easily lead to stress shielding. Although the inert polymer with lower stiffness can prevent the shortcoming, but the slowly degradation rate make the implant share space hinder the growth of new bone and affecting
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Lin, Po-Liang, and 林柏良. "The research and development of biodegradable polylactic acid based composite materials for implant and scaffold applications." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/4s6fgv.

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博士<br>國立臺北科技大學<br>工程科技研究所<br>100<br>Polylactic acid (PLA) materials have been used in biomedical applications such as bone screws, sutures, and scaffold materials because they are biodegradable, bioresorbable, and biocompatible. There is an increasing need to achieve independent control of key properties such as mechanical strength, degradation rate, and bioactivity in order to further enhance the performance of PLA-based medical implants. Because PLA composites containing hydroxyapatite (HAp) or tricalcium phosphate (TCP) particles can augment cell growth and mechanical properties, PLA compos
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Tian, Sin-Tian, and 田欣恬. "Studies on the safety of polylactic acid food packaging containers and the development of PLA composite." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/90467090332096169901.

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碩士<br>國立嘉義大學<br>食品科學系研究所(Graduate Institute of Food Science)<br>98<br>As the advance of techniques on biodegradable materials, polylactic acid (PLA) becomes a novel food packaging material. Lactic acid, the building unit of PLA, is converted to lactide through condensation reaction. In turn, high molecular weight PLA is obtained by ring-opening polymerization of lactides. The transition metals, with more or less toxicity, are commonly used as catalysts in the polymerization. The residues of catalysts might migrate into foods and raise safety concerns when PLA is used as food-contact packaging
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Yang, Jia-Kai, and 楊嘉凱. "Preparation and Characterization of Polylactic Acid Braid / Calcium Phosphate Cement Composite Scaffold for Bone Tissue Engineering." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/12052387969375416619.

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碩士<br>逢甲大學<br>纖維與複合材料學系<br>102<br>In this study, the composites of poly(lactic acid) fibers and calcium phosphate bone cement (CPC) was used to simulate the functions of cortical bone. The biodegradable polymer (PLA) would reinforce and toughen the structure of CPC. In this experiment, the PLA was braided and the surfaces were modified with NaOH solution and then washed in deionized water by the ultrasonic cleanners. The alkalized PLA braid’s structures of physical microscope on the surfaces and mechanical properties of tensile tests were tested and observed. Moreover, the different layer of a
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Chen, Ciou-yin, and 陳秋吟. "A Study on the Property Modification Analysis and Process Parameter Optimization Design of Polylactic Acid Composite Materials." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/75819454760980206840.

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碩士<br>國立臺灣科技大學<br>材料科學與工程系<br>100<br>This study discussed two types of biodegradable polymer composites (polylactic acid and polybutylene succinate). UV absorbers and hindered amine light stabilizers were added to prolong the life cycle of the composite fibers in outdoor lighting conditions. By using the multi-objective optimization theory of a variety of quality engineering approaches, this study examined the impact of the composite mixing process and melt spinning process on the product quality in different stages, in order to improve the innovative research relating to biodegradable fiber a
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Weng, Chung-Yao, and 翁崇堯. "Preparation of Nanocrystalline Cellulose (NCC) from Cotton Pulp and Improving Polylactic Acid Composite Physical Properties by Incorporating NCC and Nanosericite." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/12176353966199531124.

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碩士<br>大葉大學<br>環境工程學系碩士班<br>97<br>Cellulose is the most abundantly generated natural polymer resources. It is capable of rapid renewal. In this study, cottom pulp was hydrolyzed by sulfuric acid to produce nanocrystalline cellulose (NCC), the nanocrystalline cellulose was incorporated in polylactic acid (PLA) with nano-sericite to produce nano-composite and to enhance value-addition to cellulose. In the study, a factorial design was used to analyze the effects of sulfuric acid concentration, solid-to-liquor ratio, temperature and hydrolysis time and their interactions in order to find the optim
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Chang, Chih-Ping, and 章之平. "Preparation and characterization of Nanocrystalline Cellulose and the Effects of its Compounding with Nano-sericite on the Property Improvements of Polylactic Acid Composite Films." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/65474216752349807751.

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博士<br>國立中興大學<br>森林學系所<br>98<br>The purpose of this study was to use acid hydrolysis of cotton linter to generate nanocrystalline cellulose (NCC). Based on a 24 factorial design, the effects of sulfuric acid concentration, temperature, hydrolysis time, and the solids-to-liquid ratio on the NCC yield were examined. NCC specimens obtained from different sulfuric acid concentrations were subjected to a battery of analyses, including dynamic light scattering (DLS), transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR), 13C solid-state nuclear magnetic resonance (13C
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(8774828), Caitlyn Michelle Clarkson. "Processing and Characterization of Nanocellulose Composites: The Leap from Poly(lactic acid) to Polyamide 6." Thesis, 2020.

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This disseration covers the processing and characterization of nanocellulose polymer composites. In this disseration, two fiber spinning methods were developed to create high stiffness nanocomposite fibers from renewably-sourced materials and the properties of these nanocomposites were evaluated. Additionally, bulk nanocomposites were created and some of the properties of these materials, for different types of nanoparticles, are also discussed. Evaluation of nanocellulose as a nucleation agent in poly(lactic acid) is also presented for very small concentrations of nanocelluloses in a plastici
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Liao, Bo-Siang, and 廖柏翔. "Surface Properties of 316L Stainless Steel Modified by Poly(Methyl Methacrylate)/Polylactic Acid Composite Films and Effects of Co Addition on the Damping Properties of Cu-Al-Ni Shape Memory Alloys." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/jp33nx.

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碩士<br>國立宜蘭大學<br>化學工程與材料工程學系碩士班<br>107<br>The first part of this study is to investigate the surface properties of Poly(methyl methacrylate) (PMMA)/Polylactic acid (PLA) composite film coated 316L Stainless steel. Fourier transform infrared spectroscopy (FTIR) results showed that both the signals of the PLA and PMMA functional groups could be obtained on the surface of PMMA/PLA composite films. Water contact angle measurement results revealed that PMMA/PLA composite films have lower water contact angle than 316L Stainless steel. Water contact angle of PMMA/PLA composite films could be further d
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Yu-ChiTsao and 曹育齊. "Study of Bamboo Fiber Reinforced Polylactic Acid Composites." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/57182365451566270951.

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碩士<br>國立成功大學<br>航空太空工程學系<br>102<br>Study of Bamboo Fiber Reinforced Polylactic Acid Composite Yu-Chi Tsao Wen-Bin Young Department of Aeronautics and Astronautics, NCKU SUMMARY Bamboo fiber (BF) is a good candidate as the reinforcement for green composites. The applications of bamboo fibers as fabric or structural reinforcements are being widely investigated. This study went through the process from the bamboo strips to the fibers and compounded with the PLA to form the composite pallets for the following injection molding process. The alkali-treated BF at 100 °C for 12 h could properly deli
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Jhang, Yi, and 張翼. "A Study of Nanofiber / Polylactic Acid Green Composites." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/15056044764608177773.

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碩士<br>朝陽科技大學<br>應用化學系<br>102<br>In this study, the moisture of cellulose nanofibers from wood were effectively removed via freeze-dried technology. During this process, the agglomeration of nanofibers was reduced by controlling the concentration of nanofiber suspensions. Moreover, the dimension of the nanofibers will be reduced and the specific surface area will also be increased. Subsequently, the interfacial compatibility and dispersion between nanofibers and polymer matrix can be improved. Finally, a series of nanofibers/polylactic acid (PLA) composites are prepared by melt-blending. The re
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Κουτσομητοπούλου, Αναστασία. "Manufacturing and experimental investigation of green composite materials." Thesis, 2013. http://hdl.handle.net/10889/7245.

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The aim of the present thesis is to explore sustainable low cost environmentally friendly composite materials. It is a step by step experimental research. Firstly, taking under consideration the so far commercial available non-organic materials used as reinforcement and the petroleum based resins used as matrices, composite materials were fabricated and mechanically characterized. Different components in micro- and nano- scale were combined. Afterwards, the non-organic materials used as reinforcements were substituted by different types of non conventional natural-based fillers. The fillers
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Chia-FengHsieh and 謝家豐. "Applications of nanocrystalline cellulose reinforced polylactic acid (PLA) composites." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/wdjz28.

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Li, Jia-Sheng, and 李佳聲. "Mechanical Characteristics of Jute Rope Plain Fabric Reinforced Polylactic Acid Composites." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/28736103634876340404.

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碩士<br>萬能科技大學<br>材料科學與工程研究所<br>101<br>The main objective of this thesis was to study the mechanical characteristics of jute plain fabric reinforced Polylactic acid(PLA) composites. A ropes braiding machine was used to braid the jute yarns to get jute ropes. The ropes were used as weft and warp yarns, which supplied to a weaving loom, to fabricate reinforced fabrics. Finally, the fabrics are plain woven construction. In this study, the jute fiber ropes were treated in sodium hydroxide to clearn the reinforced fabrics. The mechanical properties of jute ropes before and after sodium hydroxide trea
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Chen, Po-Yuan, and 陳博元. "A Study of Multi-Walled Nanotubes/ Plant Fiber/ Polylactic Acid Composites." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/96507012460806842349.

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碩士<br>朝陽科技大學<br>應用化學系<br>103<br>In this study, the chemically modified kenaf fibers (KF), and an acid-treated multi-walled carbon nanotubes (MWCNTs) were added into polylactic acid (PLA) matrix. Moreover, the fibers were pre‐treated by two kinds of coupling agent (3-glycidoxypropyltr-imethoxysilane, code: OX, and vinyltriethoxy silane, code: Vi). The results showed that the reinforcing effects of OX modified fibers were better than those of Vi modified ones. The tensile strength of PLA was increased about 84% when 30wt% of OX modified KF and 1wt% of MWCNTs were added. The impact strength and h
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Chan, Chee-Leong, and 陳志良. "A Study of Microfibrillated Cellulose and Cellulose Reinforced Polylactic Acid Composites." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/37696884244411616952.

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碩士<br>朝陽科技大學<br>應用化學系<br>103<br>The aim of this study is to compare the influence of mechanical and thermal properties of polylactic acid (PLA) reinforced with different cellulose such as pineapple leaf fiber (PLF) or microfibrillated cellulose (MFC). The MFC was obtained by the TEMPO-mediated oxidation of PLF. Moreover, surface modified pineapple leaf fiber (PLF) or microfibrillated cellulose (MFC) were prepared by modification of PLF or MFC through sol-gel reaction. Finally, a series of green composites were prepared by melt-blending. The results revealed that heat deflection temperature sho
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Chang, Wen-Chieh, and 張文潔. "A Study of Polylactic Acid Green Composites Reinforcedby Natural Plant Fibers." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/61076618023644776840.

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碩士<br>朝陽科技大學<br>應用化學系碩士班<br>99<br>In this study, the reinforced fibers from pineapple leaf fiber and recycled disposable chopsticks fiber were obtained through exposure, drying, grinding and sifting. The surfaces of fibers were chemically modified by triethoxy-vinylsilane (Z-6060) to improve the compatibility between the natural plant fibers and polymer matrix. Then, the novel plant fibers/polylactic acid (PLA) green composites were prepared through melt-blending method. The results show that the addition of silane-treated plant fiber can enhance the interfacial adhesion between PLA and pl
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Chen, Yu-Da, and 陳煜達. "Research on Composites of Polylactic Acid / Nano Titanium by Melt Compounding." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/02646181697661397886.

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碩士<br>中國文化大學<br>化學工程與材料工程學系奈米材料碩士班<br>102<br>This paper aime to discuss the Polylactic acid (PLA) and nano Titanium composites formed by the processing process, physical properties, mechanical and thermal properties of.The research used 3-methacryloxy-propyl-trimethoxysilane (MPS) to modify surface of nano titanium. Prepared by mixing Polylactic acid (PLA)/nano titanium (include non-modify and modify) nano composites with different content when mixing weight percent of nano titanium by mixing. After forming the different levels of weight percent of the Polylactic acid (PLA)/nano titanium morph
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