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L’objectif de ce travail est l’étude de l’effet de l’organisation des pores dans des gels de silice synthétisés via le procédé sol-gel sur l’encapsulation et le relargage de biomolécules. Trois différents objectifs ont été envisagés via trois séries de synthèses de gels de silice : •Tester la reproductibilité d’une installation de quatre réacteurs hydrothermaux •Voir les effets de différents précurseurs de silice sur l’organisation des pores •Analyser l’influence de la quantité et le temps d’addition de l’expanseur micellaire Trois des quatre réacteurs hydrothermaux présentent une reproductibilité adéquate. Les trois échantillons de silice synthétisés à partir de précurseurs différents présentent trois morphologies différentes avec des pores désorganisés. Le temps d’addition de l’expanseur micellaire a une influence sur l’organisation des pores. Les gels de silice ont été caractérisés par analyses FTIR, adsorption-désorption d’azote, analyses thermogravimétriques (TGA) et par microscopie électronique à transmission (TEM). L’ibuprofen a été choisi comme biomolécule modèle pour l’encapsulation dans les gels de silice et le relargage. Il a été encapsulé dans trois différents échantillons pour pouvoir analyser les effets du précurseur de silice sur la cinétique de relargage. En comparant avec la littérature, une faible quantité d’ibuprofen a pu être encapsulée. L’ibuprofen présente un relargage très rapide (burst) la première heure et est totalement relargué après 19 heures. Pour la création de films de silice, deux différentes stratégies ont été utilisées : •Films de silice via dip coating •Dispersion dans trois différents polymères De très fins films ont été obtenus avec la première technique tandis que des gels avec une épaisseur plus importante ont été obtenus avec la deuxième stratégie. L’épaisseur des films a été estimée via une différence de poids pour les films réalisés par dip coating, et avec un micromètre électronique pour les films silice-polymère Nos résultats très prometteurs aident à ouvrir des nouvelles perspectives dans le domaine des biomatériaux, et plus spécifiquement dans le domaine de la biofonctionnalisation des matrices pour la reconstruction osseuse.
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In recent years, we have assisted the remarkable growth in the use of functional polyesters. This book gathers novel research works dealing with the manufacturing and characterization of polyesters that have been functionalized by synthesis, copolymerization, additives (at micro- and nanoscale), surface modification, among other methodologies, to tailor desired properties in terms of mechanical, chemical, thermal, and barrier properties, biodegradation, and biocompatibility. Thus, Advances in Manufacturing and Characterization of Functional Polyesters will serve to guide a diverse audience of polymer scientists and engineers and provides an update of the “state-of-the-art” knowledge on functional polyesters.
Research & information: general --- poly(lactic acid), halloysite nanotubes --- mechanical characterization --- morphology --- thermal characterization --- bio-based --- poly(ethyelene terephthalate)—PET --- poly(amide) 1010—PA1010 --- mechanical properties --- compatibilization --- Xibond™ 920 --- PLA --- OLA --- impact modifier --- shape memory --- packaging applications --- isodimorphism --- random copolymers --- crystallization --- nucleation --- growth rate --- bio-PET --- r-PET --- chain extenders --- reactive extrusion --- secondary recycling --- food packaging --- recycled poly(ethylene terephthalate) --- rPET --- Calcium terephthalate salts --- high performance nanocomposites --- flax --- green composites --- fiber pretreatment --- almond shell waste --- reinforcing --- polyester-based biocomposites --- physicochemical properties --- disintegration --- biopolymers composites --- MgO nanoparticles --- MgO whiskers --- in vitro degradation --- in vivo degradation --- P(3HB-co-3HHx) --- nHA --- nanocomposites --- bone reconstruction --- biomedical polymers --- hydroxyapatite --- halloysite --- Bayesian reconstruction --- homogeneity --- porous materials --- polyester fibrous materials --- copolyester --- dimensional stability --- flexible optical devices --- uniaxial stretching --- birefringence --- and barrier properties --- n/a --- poly(ethyelene terephthalate)-PET --- poly(amide) 1010-PA1010
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In recent years, we have assisted the remarkable growth in the use of functional polyesters. This book gathers novel research works dealing with the manufacturing and characterization of polyesters that have been functionalized by synthesis, copolymerization, additives (at micro- and nanoscale), surface modification, among other methodologies, to tailor desired properties in terms of mechanical, chemical, thermal, and barrier properties, biodegradation, and biocompatibility. Thus, Advances in Manufacturing and Characterization of Functional Polyesters will serve to guide a diverse audience of polymer scientists and engineers and provides an update of the “state-of-the-art” knowledge on functional polyesters.
Research & information: general --- poly(lactic acid), halloysite nanotubes --- mechanical characterization --- morphology --- thermal characterization --- bio-based --- poly(ethyelene terephthalate)—PET --- poly(amide) 1010—PA1010 --- mechanical properties --- compatibilization --- Xibond™ 920 --- PLA --- OLA --- impact modifier --- shape memory --- packaging applications --- isodimorphism --- random copolymers --- crystallization --- nucleation --- growth rate --- bio-PET --- r-PET --- chain extenders --- reactive extrusion --- secondary recycling --- food packaging --- recycled poly(ethylene terephthalate) --- rPET --- Calcium terephthalate salts --- high performance nanocomposites --- flax --- green composites --- fiber pretreatment --- almond shell waste --- reinforcing --- polyester-based biocomposites --- physicochemical properties --- disintegration --- biopolymers composites --- MgO nanoparticles --- MgO whiskers --- in vitro degradation --- in vivo degradation --- P(3HB-co-3HHx) --- nHA --- nanocomposites --- bone reconstruction --- biomedical polymers --- hydroxyapatite --- halloysite --- Bayesian reconstruction --- homogeneity --- porous materials --- polyester fibrous materials --- copolyester --- dimensional stability --- flexible optical devices --- uniaxial stretching --- birefringence --- and barrier properties --- n/a --- poly(ethyelene terephthalate)-PET --- poly(amide) 1010-PA1010
Choose an application
In recent years, we have assisted the remarkable growth in the use of functional polyesters. This book gathers novel research works dealing with the manufacturing and characterization of polyesters that have been functionalized by synthesis, copolymerization, additives (at micro- and nanoscale), surface modification, among other methodologies, to tailor desired properties in terms of mechanical, chemical, thermal, and barrier properties, biodegradation, and biocompatibility. Thus, Advances in Manufacturing and Characterization of Functional Polyesters will serve to guide a diverse audience of polymer scientists and engineers and provides an update of the “state-of-the-art” knowledge on functional polyesters.
poly(lactic acid), halloysite nanotubes --- mechanical characterization --- morphology --- thermal characterization --- bio-based --- poly(ethyelene terephthalate)—PET --- poly(amide) 1010—PA1010 --- mechanical properties --- compatibilization --- Xibond™ 920 --- PLA --- OLA --- impact modifier --- shape memory --- packaging applications --- isodimorphism --- random copolymers --- crystallization --- nucleation --- growth rate --- bio-PET --- r-PET --- chain extenders --- reactive extrusion --- secondary recycling --- food packaging --- recycled poly(ethylene terephthalate) --- rPET --- Calcium terephthalate salts --- high performance nanocomposites --- flax --- green composites --- fiber pretreatment --- almond shell waste --- reinforcing --- polyester-based biocomposites --- physicochemical properties --- disintegration --- biopolymers composites --- MgO nanoparticles --- MgO whiskers --- in vitro degradation --- in vivo degradation --- P(3HB-co-3HHx) --- nHA --- nanocomposites --- bone reconstruction --- biomedical polymers --- hydroxyapatite --- halloysite --- Bayesian reconstruction --- homogeneity --- porous materials --- polyester fibrous materials --- copolyester --- dimensional stability --- flexible optical devices --- uniaxial stretching --- birefringence --- and barrier properties --- n/a --- poly(ethyelene terephthalate)-PET --- poly(amide) 1010-PA1010
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