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Thèses sur le sujet « Bionanocompositi »

Auteur : Grafiati

Publié le 10 mars 2023

Mis à jour le 31 juillet 2025

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1

Iozzino, Valentina. "PLA-based bionanocomposites with modulated degradation rate: preparation and processing by microinjection molding." Doctoral thesis, Universita degli studi di Salerno, 2019. http://elea.unisa.it:8080/xmlui/handle/10556/4646.

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2016 - 2017<br>... The aim of this work has been to obtain bionanocomposites with a degradation rate which can be modulated in time, so that it can be possible to decide a priori the time after which the material will disappear in a given environment. At the same time, the material should preserve its properties during processing. Several mixtures of PLA (4032D, 4060D) and LDH of cation composition Mg2Al organo-modified with organic acids (succinc, fumaric and ascorbic acid) have been obtained by extrusion. From the extruded materials there were obtained films by compression molding; these fi

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He, Jing. "Des (bio)nano-composites utilisés dans le traitement d'eaux contaminées par de l'arsenic/gentamicine ou pour des applications médicales." Phd thesis, Université de Grenoble, 2013. http://tel.archives-ouvertes.fr/tel-00988092.

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Les composés dits 'bionano' (bionanocomposites) apparaissent comme un nouveau groupe de matériaux hybrides nano-structurés. Ils sont issus de la combinaison de polymères naturels et de solides inorganiques et sont de l'ordre du nanomètre dans au moins une direction. Ces matériaux hybrides conservent les structures et les propriétés fonctionnelles des polymères et matériaux inorganiques dont ils sont composés. Parallèlement, la présence de biopolymères permet de diminuer les risques environnementaux et de santés publiques liés aux nano-matériaux. Les propriétés inhérentes aux biopolymères (bioc

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Belda, Marín Cristina. "Silk bionanocomposites : design, characterization and potential applications." Thesis, Compiègne, 2020. http://www.theses.fr/2020COMP2570.

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Les « bionanocomposites » à base de soie sont des matériaux qui suscitent un intérêt croissant dans de nombreuses applications, et en particulier dans le domaine biomédical, de par leur capacité à combiner les propriétés de la fibroïne (biodégradabilité, biocompatibilité et propriétés mécaniques intéressantes) et celles des nanoparticules (NP). L’objectif de ce travail est de (i) développer une méthode efficace, et « facile » à mettre en oeuvre, permettant l’élaboration de plusieurs types de bionanocomposites de soie ; (ii) fournir une caractérisation approfondie pour une meilleure compréhensi

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Silva, Mariana Rodrigues Ferreira da. "Active and intelligent bionanocomposites for food packaging." Master's thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/22400.

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Mestrado em Biotecnologia<br>A produção de plásticos, baseados no uso de combustíveis fósseis, está a aumentar e estima-se que esta tendência continuará no futuro com impactos ambientais consideráveis. Os bioplásticos são uma alternativa amiga do ambiente. Biopolímeros como quitosana já foram adotados com sucesso para produzir bioplásticos que agem como substitutos do plástico em embalagem. A quitosana foi selecionada devido às suas numerosas vantagens para embalagem alimentar, principalmente devido às suas atividades antioxidantes e antimicrobiana. Por outro lado, o dióxido de titânio foi se

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5

Nechyporchuk, Oleksandr. "Nanofibres de cellulose pour la production de bionanocomposites." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAI056/document.

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Un des principaux challenges dans le contexte du développement des matériaux biocomposites est de remplacer les matières plastiques à base de pétrole par des matériaux biosourcés. En raison de leurs origines naturelles, d'une résistance relativement élevée et de leur capacité à former des produits transparents, les nanofibres de cellulose possèdent un grand potentiel d'applications dans les matériaux composites. Dans ce travail des résultats ont été apportés premièrement sur l'optimisation des procédés de productions de nanofibres de cellulose par des traitements biochimiques et mécaniques, de

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6

Mousa, Mohanad Hashim. "Experimental Characterisation and Modelling of Sustainable Multiscaled Bionanocomposites." Thesis, Curtin University, 2018. http://hdl.handle.net/20.500.11937/75691.

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Novel polyvinyl (PVA) bionanocomposite films reinforced with four different types of nanofillers were manufactured based on a solution casting method. The effect of nanofiller size, shape and content on the material performance of bionanocomposites was holistically investigated in experimental characterisation. Furthermore, nanomechanical properties and dimensions of nanointerphases in PVA bionanocomposites were systematically determined via peak force quantitative nanomechanical tapping mode (PFQNM). Finally, newly developed micromechanical modelling results confirmed good agreement with expe

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7

Piazzolla, Caterina. "Study of plasticised PLA based bionanocomposites reinforced with nanofibrillated cellulose." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.

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In this study polylactide (PLA)-based nanocomposites plasticised with poly(ethylene glycol) (PEG) and nanofibrillated cellulose (NFC) were evaluated. Their physico-chemical properties were assessed by field emission scanning electron microscopy (FE-SEM), gel permeation cromatography (GPC), tensile testing machine, thermo-gravimetric analysis (TGA) and differential scanning calorimetry (DSC). The effect of PEG with molecular weight of 400 g·mol-1 and 1500 g·mol-1 (PEG-400 and PEG-1500) and the influence of nanofibrillated cellulose (NFC) with different concentration (0, 1, 3, 5 wt%) on the poly

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8

Vassalli, J. Todd Grant Sheila Ann. "Development of electrospun synthetic bioabsorbable fibers for a novel bionanocomposite hernia repair material." Diss., Columbia, Mo. : University of Missouri--Columbia, 2008. http://hdl.handle.net/10355/5631.

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The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Title from PDF of title page (University of Missouri--Columbia, viewed on October 6, 2009). Thesis advisor: Dr. Sheila Grant, Includes bibliographical references.

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9

Bettini, Giacomo. "Bionanocomposites based on Plla, Pcl and montmorillonite: synthesis, characterization and crystallization." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/10025/.

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Poly(lactide) is one of the best candidate to replace conventional petroleum-based polymers, since it is biobased, biocompatible and biodegradable. However, commercial PLA materials typically have low crystallization rate resulting in long processing time and low production efficiency. In this work the effects of two nanofillers MMT30B and MMT30B-g-P(LA-co-CL) on the crystallization rate of neat PLA and PLA/PCL blend were investigated. MMT30B-g-P(LA-co-CL) was synthetized by in situ grafting reaction. The synthesis was carried in xylene at 140°C, upon the results of a screening. The grafted

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10

Touati, Souad. "Elaboration d'aérogels d'hydroxydes doubles lamellaires et de bionanocomposites à base d'alginate." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2013. http://tel.archives-ouvertes.fr/tel-00975932.

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Cette thèse présente un travail sur l'obtention d'aérogels d'HDL par séchage en conditions CO2 supercritique et l'élaboration de nouveaux bionanocomposites formés par la coprécipitation d'hydroxydes doubles lamellaire (HDL) dans l'espace confiné des billes d'alginate. Grâce à la combinaison d'une synthèse par coprécipitation Flash et d'un séchage en conditions supercritiques au CO2, des aérogels d'HDL possédant des surfaces spécifiques élevées sont élaborés. Parallèlement, l'alginate est utilisé comme une matrice de confinement pour la précipitation inorganique d'HDL. D'une part, les billes d'

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11

Liu, HuiHua. "Synergistic interactions of plasticizers and nanoclays in hydrophilic starch based bionanocomposites." Thesis, Curtin University, 2011. http://hdl.handle.net/20.500.11937/1758.

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Depletion of non-renewable resources and exorbitant levels of carbon dioxide emissions have questioned the further usage of traditional plastics. The imbalance in global sustainability has necessitated the development and use of biodegradable polymers. This research work set sights on understanding the synergistic interactions of plasticizer, starch and Na[superscript]+-montmorillonite (MMT). Having a clear view of the molecular behavior within this ternary system ameliorates the performance of the end product and fabrication of the tailored-property biodegradable polymers. Conversely, the exp

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12

Abdullah, Zainab Waheed. "Polyvinyl Alcohol / Starch/ Glycerol/ Halloysite Nanotube Bionanocomposites for Biodegradable Packaging Applications." Thesis, Curtin University, 2019. http://hdl.handle.net/20.500.11937/81687.

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Polyvinyl alcohol/ starch/ glycerol/ halloysite nanotube bionanocomposite films were manufactured using the solution casting method. The effect of material composition and nanofiller contents on mechanical, thermal, optical, water resistance and biodegradable properties as well as the migration rates of material constituents were investigated along with the morphological structures. Modelling approaches for permeabilities have developed based on Nielsen model and Cussler model in good agreement with experimental results. Finally, prepared bionanocomposite films were confirmed to be effective f

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13

ÜNALAN, İ UYSAL. "POTENTIAL USE OF GRAPHENE FOR THE GENERATION OF BIONANOCOMPOSITE MATERIALS FOR FOOD PACKAGING APPLICATIONS." Doctoral thesis, Università degli Studi di Milano, 2014. http://hdl.handle.net/2434/245012.

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Lo sviluppo di nuovi materiali multifunzionali, a minore impatto ambientale e con benefici economici, rappresenta una impellente necessità. L’avvento delle nanotecnologie ha aperto la strada a nuove possibilità, ad esempio attraverso lo sviluppo di materiali biopolimerici nanostrutturati. Questa tesi di dottorato si propone di illustrare nuove strategie per lo sviluppo di bionanocompositi a base di grafene per specifiche applicazioni nel settore dell’imballaggio alimentare. L’uso del grafene mira ad approfondire le conoscenze circa la potenziale applicazione di tale filler inorganico come alte

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14

Tavernelli, Alice. "Synthesis, characterization and crystallization of bionanocomposites based on PLLA, PCL and nanocellulose." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/9317/.

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In recent years, environmental concerns and the expected shortage in the fossil reserves have increased further development of biomaterials. Among them, poly(lactide) PLA possess some potential properties such as good ability process, excellent tensile strength and stiffness equivalent to some commercial petroleum-based polymers (PP, PS, PET, etc.). This biobased polymer is also biodegradable and biocompatible However, one great disadvantage of commercial PLA is slow crystallization rate, which restricts its use in many fields. Using of nanofillers is viewed as an efficient strategy to overcom

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15

Castro, Smirnov Fidel Antonio. "Physicochemical characterization of DNA-based bionanocomposites using nonafibrous clay minerals : biological applications." Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112260/document.

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Parmi les différents minéraux argileux, la sépiolite, qui est un silicate fibreux naturel, est un potentiel nano-transporteur prometteur pour le transfert non-viral de biomolécules. Il a en effet été montré que la sépiolite interagissait avec des molécules biologiques telles que les lipides, les polysaccharides et les protéines. Dans ce travail, nous démontrons que la sépiolite interagit également efficacement avec différents types de molécules d'ADN (génomique, plasmidique, oligonucléotides simple et double brin), et nous présentons la première étude détaillée sur les mécanismes d'interaction

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16

GUADARRAMA, REYES SARAI CARMINA 259233, and REYES SARAI CARMINA GUADARRAMA. "Obtención de un bionanocomposito con nanopartículas biogénicas de plata, para ser utilizado como hilo de sutura." Tesis de doctorado, Universidad Autónoma del Estado de México, 2018. http://hdl.handle.net/20.500.11799/94835.

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La ocurrencia de infecciones por la utilización de hilos de sutura a base de fibras naturales, representa en la actualidad, un riesgo evidente a la salud humana, especialmente los hilos de sutura multifilamento, en donde se ha encontrado una acumulación importante de comunidades bacterianas. Además de cuidar los procedimientos durante el acto quirúrgico, y la elección del material adecuado, es importante contar con sustancias o productos que posean un efecto antiséptico, que disminuya el riesgo a contaminación post quirúrgica. Uno de los requisitos más importantes que un material de sutura d

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17

Wallet, Brett. "Structural investigation of silk fibroin-based membranes." Thesis, Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/51907.

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Silk fibroin has created a surge of interest for use as organic material due to its optical transparency, biocompatibility, biodegradability, and excellent physical properties. However, the implementation of silk films and structures into biomedical and sensing devices has been relatively low due to a lack of understanding of the mechanisms involved in such implementation. Increasing need for multifunctional high-performance organic materials has caused an emphasis on the ability of researchers to spatiotemporally pattern and control the structure and consequently functional properties of ma

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18

Busse, Marta Julia. "Bionanocomposites of Fe3O4/SiO2 and alginate for magnetic removal of Cr(III) species from water." Master's thesis, Universidade de Aveiro, 2014. http://hdl.handle.net/10773/14196.

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Mestrado em Química<br>The aim of the present work was to study the removal of Cr (III) species from aqueous solutions by adsorption process, using magnetic nanoparticles functionalized with amine groups and with the polysaccharide alginate. Heavy metal pollution is serious environmental and public health problem worldwide. Chromium is one of the most toxic metal endangering human life. Cr(III) is often used in industry which caused water pollution. Therefore, increased interest by the researchers to employ nanomaterials for the removal contamination and explore adsorbents to replace ex

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Siqueira, Gilberto Antônio De Freitas. "Processing and thermo-mechanical characterization of polymer bionanocomposites reinforced with microfibrillated cellulose and cellulose whiskers." Grenoble INPG, 2010. http://www.theses.fr/2010INPG0019.

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This work describes the use of some Brazilian natural fibers (Sisal, Luffa Cylindrica and Capim Dourado) as sources of cellulose nanowhiskers and microfibrillated cellulose (MFC) for the preparation of polymeric nanocomposites. It proposes a new way of obtaining cellulose nanoparticles and exploits their intrinsic properties. For this purpose two main routes were investigated, namely (i) use of chemically grafted cellulosic nanoparticles reacted with isocyanates and incorporated in a -polycaprolactone (PCL) matrix, and (ii) direct use of cellulose nanoparticles as reinforcement in a natural r

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Nunes, Juliana Carla. "Preparação e caracterização de filmes comestíveis baseados em gelatina, chá-verde e nanoemulsão de óleo essencial de limão /." Ilha Solteira, 2018. http://hdl.handle.net/11449/156001.

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Orientador: Marcia Regina de Moura Aouada<br>Resumo: Diante da crescente preocupação com os impactos ambientais relacionados ao uso de polímeros sintéticos, estudos visando à obtenção e aplicação de materiais poliméricos de fontes renováveis vêm aumentando, como por exemplo, o desenvolvimento de filmes comestíveis à base de polímeros naturais. Para a obtenção de filmes comestíveis necessita-se de um material polimérico que forme uma matriz homogênea e contínua. A gelatina é um polímero natural, de fonte abundante, biodegradável e biocompatível e tais características motivam sua utilização como

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Pilon, Andrea S. "The Development and Characterization of a Bionanocomposite Tissue Engineering Scaffold Consisting of Poly(lactic acid) (PLA) and Monetite for Bone Regeneration." University of Toledo / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1278433227.

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Ferreira, Leite Liliane Samara. "Préparation et caractérisation de bionanocomposites à base de protéines et nanocristaux de cellulose par casting continu." Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALI063.

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Cette thèse étudie la production et la caractérisation de films bionanocomposites de gélatine-cellulose nanocristaux (CNCs) destinés aux emballages alimentaires multifonctionnels. L’évolutivité des films de gélatine/CNCs a été obtenue par casting continu, et les paramètres rhéologiques des solutions filmogènes et la température de séchage nécessaire pour produire 12 m de film/h ont été établis. Le processus de casting continu s'est avéré avantageux par rapport au processus de casting conventionnel. Les tests de traction, l'analyse thermogravimétrique et l'analyse de perméabilité à la vapeur d'

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Dhanasekaran, Swaminathan Puttagounder. "Fabrication and characterization of highly porous peek bionanocomposites incorporated with carbon and hydroxyapatite nanoparticles for scaffold applications." Diss., Wichita State University, 2013. http://hdl.handle.net/10057/6420.

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Zhou, Mengbo [Verfasser], Thomas [Gutachter] Heinze, and Felix [Gutachter] Schacher. "Magnetic bionanocomposites with low melting temperature : fabrication, characterization, and application / Mengbo Zhou ; Gutachter: Thomas Heinze, Felix Schacher." Jena : Friedrich-Schiller-Universität Jena, 2019. http://d-nb.info/1207272736/34.

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Coativy, Gildas. "Optimisation des propriétés de mémoire de forme de l’amidon : rôle des procédés thermomécaniques et apport de l’introduction de nanocharges." Nantes, 2013. http://archive.bu.univ-nantes.fr/pollux/show.action?id=dd59b6e5-214f-4120-a9fc-fc73e3210d86.

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L’amidon amorphe possède des propriétés de mémoire de forme : une fois déformé à chaud puis refroidi, il peut recouvrer sa forme initiale lors du passage de la transition vitreuse par chauffage ou par absorption d’eau. L’objectif principal de ce travail était d’améliorer les performances mécaniques du matériau lors de la recouvrance de forme. Deux approches ont été étudiées : l’optimisation de la mise en forme du matériau à chaud et l’introduction de nanocharges lamellaires (montmorillonites) dans la matrice par extrusion bi-vis. Le développement de procédés modèles et de méthodes spécifiques

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Dall'Osso, Nicolò. "Shelf Life Assessment of Fresh Poultry Meat Packaged in Novel Bionanocomposite of Chitosan Incorporated with ZnO nanoparticles synthesized using food industry by-products." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/20653/.

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Nel settore alimentare viene utilizzata un’elevata quantità di materie plastiche per conservare i prodotti e facilitarne la distribuzione. L’utilizzo di questi polimeri ha un costo ambientale piuttosto elevato, per questo trovare surrogati ecosostenibili diventa sempre più importante. In questa tesi abbiamo testato l’efficacia del confezionamento di un prodotto altamente deperibile, quale carne di pollo, con un biofilm a base di chitosano. Il chitosano è polisaccaride largamente presente in natura, dotato di caratteristiche chimico-fisiche che permettono l’ottenimento di un film con proprietà

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Mansa, Rola. "Preparation and Characterization of Novel Montmorillonite Nanocomposites." Thèse, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/20207.

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Clay minerals have historically played a consequential role in human health. While the beginnings were rooted in geophagy, a primitive act of consuming earth, the health-related uses of clay minerals have evolved and diversified over time. As excipients in pharmaceutical formulations, clay minerals can attribute novel properties onto intercalated compounds. Intercalating oxybenzone, a UV filter, within the interlamellar space of montmorillonite is desirable in order to minimize direct contact with skin. Intercalating resveratrol, a compound known for attributing beneficial effects onto hum

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Cuadra, Ramírez Felipe Andrés. "Evaluación in vivo en modelo animal de la capacidad de bionanocompositos a base de nanopartículas de vidrio bioactivo para estimular la regeneración de tejido óseo." Tesis, Universidad de Chile, 2017. http://repositorio.uchile.cl/handle/2250/146855.

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Trabajo de Investigación Requisito para optar al Título de Cirujano Dentista<br>Introducción La reparación de tejidos óseos en odontología es una necesidad en distintos tipos de cirugías. Sin embargo, los autoinjertos, aloinjertos y xenoinjertos que existen en el mercado presentan limitada capacidad osteogénica que no siempre permiten obtener resultados clínicos satisfactorios. Por esta razón la ingeniería de tejidos cobra importancia, ya que esta disciplina busca la síntesis de injertos aloplásticos o biomateriales sintéticos, que superen las capacidades regenerativas de los injert

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Souza, Josefa Virginia da Silva. "Preparação e caracterização de bionanocompósitos à base de gelatina e magnetita reticulados com sacarose." Universidade do Estado do Rio de Janeiro, 2012. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=3532.

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Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Nesta dissertação, foram estudadas a preparação e a caracterização debionanocompósitos à base de gelatina e magnetita. Sacarose foi empregada comoagente de reticulação e gelatina tipo A e gelatina tipo B foram comparadas nautilização para a preparação das microesferas por meio de emulsão água-em-óleo.As microesferas foram caracterizadas por VSM, DSC, TGA, FTIR, testes deinchamento, espectroscopia de absorção atômica, microscopia ótica e microscopiaeletrônica de varredura.

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Silva, Ingrid Souza Vieira da. "Nanocompósitos de pectina reforçados com nanocristais de celulose para utilização como revestimentos para morangos." Universidade Federal de Uberlândia, 2015. https://repositorio.ufu.br/handle/123456789/17438.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>In this work, the effects of the incorporation were valued of cellulose nanocrystals of the wood pulp of Eucalyptus urograndis from three different times of acid hydrolysis (20, 50 and 80 minutes) in order to determine which of three types of nanocrystals would be most appropriate in the reinforcement function for the matrix of apple pectin. The films were characterized using dynamic mechanical thermal analysis to choose the best reinforcement element in terms of improvement in mechanical properties. After choosing the appropriate

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Silva, Nuno Hélder da Cruz Simões. "Production of protein nanofibers and their application in the development of innovative materials." Doctoral thesis, Universidade de Aveiro, 2018. http://hdl.handle.net/10773/23348.

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Doutoramento em Engenharia Química<br>As nanofibras proteicas, também conhecidas como fibrilas amilóide, estão a ganhar muito interesse devido às suas propriedades únicas, nomeadamente elevada resistência mecânica e propriedades funcionais. Estas nanofibras caracterizam-se por depósitos proteicos que resultam de um processo onde a molécula proteica adquire uma conformação estrutural em folhas-β. Dadas as suas propriedades, estas nanofibras têm sido estudadas como elementos estruturais e funcionais no desenvolvimento de materiais inovadores para aplicação em diferentes áreas como, por exemplo,

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Nevena, Vukić. "Strukturiranje kompozitnih materijala na osnovu poli(laktida) i ugljeničnih nanocevi." Phd thesis, Univerzitet u Novom Sadu, Tehnološki fakultet Novi Sad, 2019. https://www.cris.uns.ac.rs/record.jsf?recordId=111137&source=NDLTD&language=en.

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U ovom radu, izvr&scaron;ena je sinteza i karakterizacija bionanokompozitnih materijala na osnovu poli(laktida) i vi&scaron;eslojnih ugljeničnih nanocevi. Ispitivan je uticaj različitih tehnika funkcionalizacije nanocevi, kao i izbor uslova sinteze i odnosa polaznih komponenti sistema, na svojstva dobijenih kompozitnih materijala na osnovu poli(L-laktida). Radi postizanja uniformne raspodele nanopunila u kompozitima, vi&scaron;eslojne ugljenične nanocevi su modifikovane hemijskom i radijacionom funkcionalizacijom. Izvr&scaron;ena je karakterizacija ugljeničnih nanocevi, sa ciljem utvrđivanja u

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Singh, Surabhi. "Studies on the development of dextran based bionanocomposite membranes for wound care." Thesis, 2017. http://localhost:8080/xmlui/handle/12345678/7415.

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Guzmán, Sierra Dayana Lizethe. "Flexible piezoelectric bionanocomposites for biomedical sensors." Master's thesis, 2018. http://hdl.handle.net/10773/25894.

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In recent decades, there has been increasing interest in the development of new materials in order to achieve the "Internet of Things (IoT)" which provided for the connection of 20 to 30 billion devices to the Internet by 2020. The implementation of the "Internet of Things "requires the development of base technology, which includes transducers, actuators and sensors. Sensors are often used in biomedical applications that require flexibility, biocompatibility and sustainability. In this context, the motivation of this work was the preparation of a bionanocomposite for biocompatible piezoelectr

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Sureshkumar, Manthiriyappan, and 宋裕民. "MULTIFUNCTIONAL BIONANOCOMPOSITES FROM SUSTAINABLE RESOURCE FOR BIOTECHNOLOGY APPLICATIONS." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/18019246682355060999.

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博士<br>國立臺灣科技大學<br>化學工程系<br>98<br>The field of magnetic nanocomposites is fascinating from the aspect of integrating the key features of both polymers and magnetic nanoparticles into an attractive new generation hybrid material. The sustainable biopolymers such as cellulose, chitin and chitosan were used for this study. The synthesis of biopolymers-based magnetic nanocomposites was accomplished through co-precipitation method. Biopolymers homogenized with ferric and ferrous mixture followed by adjusting the homogenate to alkaline pH generates desired nanocomposites. Magnetic-bacterial cellulose

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Macheca, Afonso. "Preparation and properties characterization of polyamide/clay bionanocomposites." Thesis, 2016. http://hdl.handle.net/2263/57490.

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A novel method for polyamide/clay bio-nanocomposites fabrication was developed in an attempt to facilitate ?extensive delamination? of clay stacks in polyamide matrices. The method, the so-called ?surfactant-free organo-modification approach? did not employ any surfactants for the matrix-clay compatibilisation. The idea was to exploit the use of dimer fatty acid polyamides with protonated amine end groups as clay surface modifiers of the clay previously dispersed in a liquid medium. The clays of choice in the study were the standard smectite clays commonly used to prepare polymer-clay nanocomp

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Vidushi. "Development of novel bionanocomposites for musculoskeletal reconstruction applications." Thesis, 2021. https://etd.iisc.ac.in/handle/2005/5730.

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With an increase in the aging population worldwide, a surge in demand for joint replacement has been observed. It has been anticipated that by 2030, the demand for primary total hip joint replacement (THR) will increase by 171% for patients less than 65 years of age. Although THR is considered to be the most efficacious surgical intervention in load-bearing orthopedic applications, its overall success is constrained by unavoidable clinical issues such as osteolysis and aseptic loosening resulting in implant failure. In this context, Ultra-high molecular weight polyethylene (UHMWPE) has been

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Malwela, Thomas. "The study of bionanocomposite thin films and their crystal growth behaviour." Thesis, 2014. http://hdl.handle.net/10210/12337.

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Ph.D. (Chemistry)<br>This study focuses on the morphology and crystal-growth behaviour of polyactide (PLA)-based blends and blends modified with organoclay thin films. The study further examined the effect of blending and the incorporation of organoclays on the enzymatic degradation behaviour. Thin films of unmodified and nanoclay-modified PLA/poly(butylene succinate) (PBS) blends were cast on a glass substrate by a spin coater, while thin films of biodegradable PLA/poly[(butylene succinate)-coadipate] PBSA blends and blends containing organoclays were cast on a silicon (100) wafer substrate.

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YADAV, REETU. "STUDIES ON SILK FIBROIN/NANOPARTICULATE FILLER BASED BIONANOCOMPOSITE FOR OPTOELECTRONICS APPLICATIONS." Thesis, 2022. http://dspace.dtu.ac.in:8080/jspui/handle/repository/19753.

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Organisations are increasingly employing databases on a large scale to store critical data that is essential for their functioning. Malicious access and modifications of the databases may lead to adverse financial and legal implications. In recent years, security researchers have focused on detecting abuse of access privileges by the employees of an organisation. Identifying threats from insiders is hard because they are aware of the organisation of the database in addition to having authorised access privileges. Therefore, an intrusion detection system(IDS) collects data from a computer

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Makhado, Edwin. "Poly(ε-caprolactone) based bionanocomposites for food packaging application". Thesis, 2014. http://hdl.handle.net/10210/11345.

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Upadhyay, Rahul Kumar. "Development of Polyethylene Grafted Graphene Oxide Reinforced High Density Polyethylene Bionanocomposites." Thesis, 2017. http://etd.iisc.ac.in/handle/2005/3587.

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The uniform dispersion of the nano fillers without agglomeration in a polymeric matrix is widely adapted for the purpose of mechanical properties enhancement. In the context to biomedical applications, the type and amount of nanoparticles can potentially influence the biocompatibility. In order to address these issues, High Density Polyethylene (HDPE) based composites reinforced with graphene oxide (GO) were prepared by melt mixing followed by compression moulding. In an attempt to tailor the dispersion and to improve the interfacial adhesion, polyethylene (PE) was immobilized onto GO sheets b

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Upadhyay, Rahul Kumar. "Development of Polyethylene Grafted Graphene Oxide Reinforced High Density Polyethylene Bionanocomposites." Thesis, 2017. http://etd.iisc.ernet.in/2005/3587.

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The uniform dispersion of the nano fillers without agglomeration in a polymeric matrix is widely adapted for the purpose of mechanical properties enhancement. In the context to biomedical applications, the type and amount of nanoparticles can potentially influence the biocompatibility. In order to address these issues, High Density Polyethylene (HDPE) based composites reinforced with graphene oxide (GO) were prepared by melt mixing followed by compression moulding. In an attempt to tailor the dispersion and to improve the interfacial adhesion, polyethylene (PE) was immobilized onto GO sheets b

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Tsai, Kai-Hsun, та 蔡凱勛. "Fabrication of array-type glucose sensors using ultrasonic liquid atomizer for sprying γ-APTES/SiO2 bionanocomposite". Thesis, 2013. http://ndltd.ncl.edu.tw/handle/17244784853860831648.

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碩士<br>國立暨南國際大學<br>應用材料及光電工程學系<br>101<br>The aim of this thesis focuses on the film deposition of γ-APTES mixed with PDMS-treated silica nanoparticles (NPs) by ultrasonic liquid atomizer for sensor applications, investigating the effects on glucose sensing property of the film in different NPs/γ-APTES weight ratio, different γ-APTES/C2H5OH concentration ratio, and ultraviolet (UV) light exposure. The reason we deposit the γ-APTES+NPs nanocomposite thin film on poly-silicon wire (PSW) by an ultrasonic liquid atomizer is that we might fabricate the glucose sensors array by batch production. We fi

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Hsiao, Chi-Lin, та 蕭祺霖. "Fabrication of array-type dopamine sensors using ultrasonic liquid atomizer for spraying γ-APTES/SiO2 bionanocomposite". Thesis, 2013. http://ndltd.ncl.edu.tw/handle/72399870932952718484.

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碩士<br>國立暨南國際大學<br>應用材料及光電工程學系<br>101<br>The purpose of the thesis is to use the ultrasonic liquid atomizer to spray the sensing membrane of a mixture of 3-aminopropyltriethoxysilane (γ-APTES) and polydimethylsiloxane (PDMS)-treated hydrophobic fumed silica nanoparticles (NPs) onto a polysilicon wire (PSW), investigating the characteristics of electrical interference of the PSW in detectingthe nerve substance of dopamine. The ultrasonic liquid atomizer we used might rapidly spray the γ-APTES+NPs onto the PSW with the advantages of large-area production as well as with good uniformity of th

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Araújo, David Jefferson Cardoso. "Production of cellulose-based bioplastics from agroindustrial residues." Doctoral thesis, 2020. http://hdl.handle.net/1822/76361.

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Tese de Doutoramento (Gestão e Tratamento de Resíduos)<br>O desenvolvimento de plásticos biodegradáveis e de base biológica desempenham um papel fundamental na transição para uma economia circular, nomeadamente em aplicações de caso único, como embalagens. Esta tipologia de materiais basia-se no uso de matérias-primas renováveis, na possibilidade de reciclagem orgânica e na economia de recursos por reprocessamento. A biomassa lignocelulósica destaca-se como uma fonte promissora de biopolímeros naturais, sendo os resíduos agroindustriais uma fonte atraente devido à sua disponibilidade, ba

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