Bio-inspired hydrogen-bond cross-link strategy toward strong and tough polymeric materials

Song, Pingan and Xu, Zhiguang and Lu, Yuan and Guo, Qipeng (2015) Bio-inspired hydrogen-bond cross-link strategy toward strong and tough polymeric materials. Macromolecules, 48 (12). pp. 3957-3964. ISSN 0024-9297

Abstract

It remains a huge challenge to create advanced polymeric materials combining high strength, great toughness, and biodegradability so far. Despite enhanced strength and stiffness, biomimetic materials and polymer nanocomposites suffer notably reduced extensibility and toughness when compared to polymer bulk. Silk displays superior strength and toughness via hydrogen bonds (H-bonds) assembly, while cuticles of mussels gain high hardness and toughness via metal complexation cross-linking. Here, we propose a H-bonds cross-linking strategy that can simultaneously strikingly enhance strength, modulus, toughness, and hardness relative to polymer bulk. The H-bond cross-linked poly(vinyl alcohol) exhibits high yield strength (140 MPa), reduced modulus (22.5 GPa) in nanoindention tests, hardness (0.5 GPa), and great extensibility (40%). More importantly, there exist semiquantitive linear relationships between the number of effective H-bond and macroscale properties. This work suggests a promising methodology of designing advanced materials with exceptional mechanical by adding low amounts (1.0 wt %) of small molecules multiamines serving as H-bond cross-linkers.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty / Department / School: No Faculty
Date Deposited: 13 Jul 2017 04:09
Last Modified: 13 Jul 2017 04:09
Uncontrolled Keywords: Hydrogen; Biodegradation; polymers; nanocomposites
Fields of Research : 03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030302 Nanochemistry and Supramolecular Chemistry
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: 10.1021/acs.macromol.5b00673
URI: http://eprints.usq.edu.au/id/eprint/32732

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