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Nanocomposites with Biodegradable PolymersSynthesis, Properties, and Future Perspectives$
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Vikas Mittal

Print publication date: 2011

Print ISBN-13: 9780199581924

Published to Oxford Scholarship Online: September 2011

DOI: 10.1093/acprof:oso/9780199581924.001.0001

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Gelatine-based bio-nanocomposites

Gelatine-based bio-nanocomposites

Chapter:
(p.209) 9 Gelatine-based bio-nanocomposites
Source:
Nanocomposites with Biodegradable Polymers
Author(s):

Francisco M. Fernandes

Margarita Darder

Ana I. Ruiz

Pilar Aranda

Eduardo Ruiz-Hitzky

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199581924.003.0009

Gelatine is a well-known structural protein widely used in the daily life, as well as in the scientific and technological areas for the preparation of a great variety of composite materials. But in spite of its abundance and common use, gelatine presents itself as a complex biopolymer with a mixed character between a protein, since it is derived from collagen, and a synthetic linear polymer with random spatial arrangement above certain temperature. For numerous applications, mainly in biomedicine, the biocompatible and biodegradable properties of gelatine are crucial, and usually the reinforcement of biopolymer matrix by assembling to inorganic or hybrid nanoparticles is also required to improve its mechanical stability. Alternative treatments such as chemical crosslinking may also contribute to reduce water swelling and enhance the mechanical properties as well as thermal stability. The incorporation of inorganic solids into the proteinous matrix allows tailoring both the mechanical and functional properties of the resulting gelatine-based composites. Many strategies may be followed to tune the functional properties: selection of inorganic solids offering the desired functionalities, grafting of suitable functional groups to the gelatine hybrids, or combination of additional polymers or fillers in ternary composites. In this way, advanced functional materials of increasing complexity are developed from the basis of a very common biopolymer, opening the way for a wide range of applications of the gelatine-based nanocomposites.

Keywords:   gelatin, spatial arrangement, thermal stability, mechanical performance, grafting, water swelling

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