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Cellulose, chitin and silk: the cornerstones of green composites
University of São Paulo, Brazil.
RISE Research Institutes of Sweden, Materials and Production, Polymeric Materials and Composites.ORCID iD: 0000-0003-2893-8554
University of São Paulo, Brazil.
UNIFESP, Brazil.
2022 (English)In: Emergent Materials, ISSN 2522-5731, Vol. 5, no 3, p. 785-Article in journal (Refereed) Published
Abstract [en]

This overview article is concerned with fabrication and applications of the composites of three major biopolymers, cellulose (Cel), chitin (Chn)/chitosan (Chs), and silk fibroin (SF). A brief discussion of their molecular structures shows that they carry functional groups (-OH, -NH-COCH3, -NH2, -CONH-) whose hydrogen-bonding, and der Waals interactions lead to semi-crystalline structures in the solid phase. There are several classes of solvents that disrupt these interactions, hence dissolve the above-mentioned biopolymers. These include solutions of inorganic and organic electrolytes in dipolar aprotic solvents (DASs), ionic liquids (ILs), and their solutions in DASs. Mixing of biopolymer solutions leads to efficient mutual interactions, hence formation of relatively homogeneous composites. These are then regenerated in non-solvents (water, ethanol, acetone) in different physical forms, e.g., fibers, nanoparticles and films. We discuss the fabrication of these products that have enormous potential use in the textile industry, in medicine, in the food industry, and decontamination of fluids. These applications will most certainly expand due to the attractive characteristics of these composites (renewability, sustainability, biodegradation) and the increased public concern about the adverse environmental impact of petroleum-based polymers, as recently shown by the presence of microplastics in air, water, land, and food (Akdogan & Guven in Environ Pollut. 254:113011 (2019)).

Place, publisher, year, edition, pages
Springer Nature , 2022. Vol. 5, no 3, p. 785-
Keywords [en]
Biopolymer solvents, Cellulose, Chitin, Chitosan, Composite particles, Fibers, Films, Ionic liquids, Silk fibroin, Tissue engineering, Acetone, Biodegradable polymers, Biodegradation, Biomolecules, Biopolymers, Hydrogen bonds, Organic solvents, Sustainable development, Textile industry, Adverse environmental impacts, Dipolar aprotic solvent, Food industries, Green composites, Ionic liquid (ils), Mutual interaction, Organic electrolyte, Semicrystallines, Environmental impact
National Category
Polymer Chemistry
Identifiers
URN: urn:nbn:se:ri:diva-56939DOI: 10.1007/s42247-021-00308-0Scopus ID: 2-s2.0-85118645839OAI: oai:DiVA.org:ri-56939DiVA, id: diva2:1613196
Note

Funding details: Fundação de Amparo à Pesquisa do Estado de São Paulo, FAPESP, 2014/22136-4, 2016/22869-7, 2017/06394-1; Funding details: Svenska Forskningsrådet Formas, 942-2015-388; Funding details: Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq, 306108/2019-4; Funding text 1: O. A. El Seoud and M. Kostag thank the FAPESP research foundation for financial support, grant numbers 2014/22136-4, 2016/22869-7 and 2017/06394-1. O. A. El Seoud thanks CNPq for research productivity fellowship (grant 306108/2019-4). K. Jedvert thanks the Swedish Research Council Formas, grant number 942-2015-388.

Available from: 2021-11-22 Created: 2021-11-22 Last updated: 2023-01-04Bibliographically approved

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