LAPSE:2020.1001
Published Article
LAPSE:2020.1001
Sustainable Water Responsive Mechanically Adaptive and Self-Healable Polymer Composites Derived from Biomass
September 23, 2020
New synthetic biobased mechanically adaptive composites, responding to water and having self-healing property, were developed. These composites were prepared by introducing plant-based cellulose nanofibrils (CNFs) at 10, 20, and 25% (v/v) concentration into a biobased rubbery poly (myrcene-co-furfuryl methacrylate) (PMF) matrix by solution mixing and subsequent compression molding technique. The reinforcement of CNFs led to an increase in the tensile storage modulus (E’) of the dry composites. Upon exposure to water, water sensitivity and a drastic fall in storage moduli (E’) were observed for the 25% (v/v) CNF composite. A modulus reduction from 1.27 (dry state) to 0.15 MPa (wet state) was observed for this composite. The water-sensitive nature of the composites was also confirmed from the force modulation study in atomic force microscopy (AFM), revealing the average modulus as 82.7 and 32.3 MPa for dry and swollen composites, respectively. Interestingly, the composites also showed thermoreversibility and excellent healing property via Diels-Alder (DA) click chemistry using bismaleimide as a crosslinker, when the scratched samples were heated at 120 °C (rDA) for 10 h and then cooled down to 60 °C (DA) followed by room temperature. The healing efficiency was obtained as about 90% from the AFM 3D height images. Thus, the composites exhibited dual stimuli-responsive behavior as mechanically adaptive water sensitive polymers with water as the stimulus and self-healing polymer using bismaleimide as an external stimulus. Therefore, this study provides guidance and new frontiers to make use of composite materials based on biopolymers for various potential smart and biomedical applications.
Keywords
cellulose nanofibrils, green composites, mechanically adaptive behavior, poly (myrcene-co-furfuryl methacrylate), self-healing, water-sensitivity
Subject
Suggested Citation
Sahu P, Bhowmick AK. Sustainable Water Responsive Mechanically Adaptive and Self-Healable Polymer Composites Derived from Biomass. (2020). LAPSE:2020.1001
Author Affiliations
Sahu P: Rubber Technology Centre, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India [ORCID]
Bhowmick AK: Rubber Technology Centre, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India; Department of Chemical and Biomolecular Engineering, The University of Houston, 4726 Calhoun Rd, Houston, TX 77204-4004, USA [ORCID]
Journal Name
Processes
Volume
8
Issue
6
Article Number
E726
Year
2020
Publication Date
2020-06-22
Published Version
ISSN
2227-9717
Version Comments
Original Submission
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PII: pr8060726, Publication Type: Journal Article
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LAPSE:2020.1001
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doi:10.3390/pr8060726
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Sep 23, 2020
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CC BY 4.0
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Sep 23, 2020
 
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Sep 23, 2020
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Calvin Tsay
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