Thermomechanically processed chitosan:gelatin films being transparent, mechanically robust and less hygroscopic

Ying Chen; Qingfei Duan; Long Yu; Fengwei Xie

doi:10.1016/j.carbpol.2021.118522

Thermomechanically processed chitosan:gelatin films being transparent, mechanically robust and less hygroscopic

Ying Chen, Qingfei Duan, Long Yu, Fengwei Xie

Research output: Contribution to journal › Article › peer-review

35 Citations (SciVal)

Abstract

Chitosan and gelatin are attractive polymeric feedstocks for developing environmentally benign, bio-safe, and functional materials. However, cost-effective methods to achieve advantageous materials properties and tailor their functionality are still lacking, but interesting. Herein, we found that physically mixing chitosan and gelatin at 1:1 (w/w) ratio resulted in materials with properties (higher Young's modulus (603.8 MPa) and tensile strength (33.6 MPa), and reduced water uptake (45%) after 6 h of water soaking) better than those of the materials based on mainly chitosan or gelatin. We attribute this synergy to the ionic and hydrogen-bonding interactions between the two biopolymers enabled by high-viscosity thermomechanical processing. Despite the lowest hygroscopicity, the 1:1 chitosan:gelatin films displayed the highest surface hydrophilicity. Besides, addition of gelatin to chitosan led to films being brighter, more transparent and amorphous. Thus, this work has generated new understanding to enhance the application of biopolymers for e.g. packaging, coating, and biomedical applications.

Original language	English
Article number	118522
Journal	Carbohydrate Polymers
Volume	272
Early online date	4 Aug 2021
DOIs	https://doi.org/10.1016/j.carbpol.2021.118522
Publication status	Published - 15 Nov 2021

Funding

This work was supported by the National Key Research and Development Program of China ( 2018YFD0400702 ), the Guangdong Province Key-Area R&D Program ( 2019B020210002 ), and the 111 Project ( B17018 ). Y. Chen acknowledges the State Scholarship Fund provided by the China Scholarship Council (CSC) for supporting her studies at the National University of Singapore.

Funders	Funder number
Guangdong Province Key-Area R&D Program	2019B020210002
National University of Singapore
China Scholarship Council
National Key Research and Development Program of China	2018YFD0400702
Higher Education Discipline Innovation Project	B17018

Keywords

Acetic acid (PubChem CID: 176)
Biopolymer composite
Chitosan
Chitosan (PubChem CID: 71853)
Gelatin
Gelatin (PubChem CID: 381623137)
Glycerol (PubChem CID: 753)
Mechanical properties
Optical properties
Water (PubChem CID: 962)
Water absorption

ASJC Scopus subject areas

Polymers and Plastics
Organic Chemistry
Materials Chemistry

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10.1016/j.carbpol.2021.118522

https://wrap.warwick.ac.uk/id/eprint/156805/

Cite this

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title = "Thermomechanically processed chitosan:gelatin films being transparent, mechanically robust and less hygroscopic",

abstract = "Chitosan and gelatin are attractive polymeric feedstocks for developing environmentally benign, bio-safe, and functional materials. However, cost-effective methods to achieve advantageous materials properties and tailor their functionality are still lacking, but interesting. Herein, we found that physically mixing chitosan and gelatin at 1:1 (w/w) ratio resulted in materials with properties (higher Young's modulus (603.8 MPa) and tensile strength (33.6 MPa), and reduced water uptake (45%) after 6 h of water soaking) better than those of the materials based on mainly chitosan or gelatin. We attribute this synergy to the ionic and hydrogen-bonding interactions between the two biopolymers enabled by high-viscosity thermomechanical processing. Despite the lowest hygroscopicity, the 1:1 chitosan:gelatin films displayed the highest surface hydrophilicity. Besides, addition of gelatin to chitosan led to films being brighter, more transparent and amorphous. Thus, this work has generated new understanding to enhance the application of biopolymers for e.g. packaging, coating, and biomedical applications.",

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author = "Ying Chen and Qingfei Duan and Long Yu and Fengwei Xie",

year = "2021",

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day = "15",

doi = "10.1016/j.carbpol.2021.118522",

language = "English",

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journal = "Carbohydrate Polymers",

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AU - Chen, Ying

AU - Duan, Qingfei

AU - Yu, Long

AU - Xie, Fengwei

PY - 2021/11/15

Y1 - 2021/11/15

N2 - Chitosan and gelatin are attractive polymeric feedstocks for developing environmentally benign, bio-safe, and functional materials. However, cost-effective methods to achieve advantageous materials properties and tailor their functionality are still lacking, but interesting. Herein, we found that physically mixing chitosan and gelatin at 1:1 (w/w) ratio resulted in materials with properties (higher Young's modulus (603.8 MPa) and tensile strength (33.6 MPa), and reduced water uptake (45%) after 6 h of water soaking) better than those of the materials based on mainly chitosan or gelatin. We attribute this synergy to the ionic and hydrogen-bonding interactions between the two biopolymers enabled by high-viscosity thermomechanical processing. Despite the lowest hygroscopicity, the 1:1 chitosan:gelatin films displayed the highest surface hydrophilicity. Besides, addition of gelatin to chitosan led to films being brighter, more transparent and amorphous. Thus, this work has generated new understanding to enhance the application of biopolymers for e.g. packaging, coating, and biomedical applications.

AB - Chitosan and gelatin are attractive polymeric feedstocks for developing environmentally benign, bio-safe, and functional materials. However, cost-effective methods to achieve advantageous materials properties and tailor their functionality are still lacking, but interesting. Herein, we found that physically mixing chitosan and gelatin at 1:1 (w/w) ratio resulted in materials with properties (higher Young's modulus (603.8 MPa) and tensile strength (33.6 MPa), and reduced water uptake (45%) after 6 h of water soaking) better than those of the materials based on mainly chitosan or gelatin. We attribute this synergy to the ionic and hydrogen-bonding interactions between the two biopolymers enabled by high-viscosity thermomechanical processing. Despite the lowest hygroscopicity, the 1:1 chitosan:gelatin films displayed the highest surface hydrophilicity. Besides, addition of gelatin to chitosan led to films being brighter, more transparent and amorphous. Thus, this work has generated new understanding to enhance the application of biopolymers for e.g. packaging, coating, and biomedical applications.

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KW - Chitosan

KW - Chitosan (PubChem CID: 71853)

KW - Gelatin

KW - Gelatin (PubChem CID: 381623137)

KW - Glycerol (PubChem CID: 753)

KW - Mechanical properties

KW - Optical properties

KW - Water (PubChem CID: 962)

KW - Water absorption

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JO - Carbohydrate Polymers

JF - Carbohydrate Polymers

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Thermomechanically processed chitosan:gelatin films being transparent, mechanically robust and less hygroscopic

Abstract

Funding

Keywords

ASJC Scopus subject areas

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