Synergistic water-driven shape memory performance and improving mechanism of grading photo-thermal curing shape memory composite

Wenxin Wang; Jing Yang; Wei Li; Yongtao Yao; Yaqian Yan; Wenjing Wang; Ning Wang; Jinsong Leng

Materials & Design (Feb 2022)

Synergistic water-driven shape memory performance and improving mechanism of grading photo-thermal curing shape memory composite

Wenxin Wang,
Jing Yang,
Wei Li,
Yongtao Yao,
Yaqian Yan,
Wenjing Wang,
Ning Wang,
Jinsong Leng

Affiliations

Wenxin Wang: State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China; Corresponding authors.
Jing Yang: State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China
Wei Li: The Sixth Academy of China Aerospace Science & Industry Corporation, 65 Xinhua East Road, 010010, China
Yongtao Yao: Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150080, China; National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, China
Yaqian Yan: State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China
Wenjing Wang: State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China
Ning Wang: State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China; Corresponding authors.
Jinsong Leng: Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150080, China

Journal volume & issue: Vol. 214
p. 110397

Abstract

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Shape memory materials draw much attention due to various promising potential applications. This work prepares a novel shape memory composite via grading photo-thermal curing method, which has not yet been reported. Expectedly, it merges advantages of epoxy-based shape memory polymer (EP) and polyvinyl alcohol-based shape memory polymer (PVA), which has applicable stiffness and multi-stimuli responsive performance. The unsatisfactory mechanical properties of most water-driven shape memory polymer (SMP) is expected to be solved by this fabrication strategy, so that the application range of water-driven SMP could be further extended. The synergistic plasticization of PVA and EP dominates water-driven shape memory behavior of this composite. Interestingly, its water-driven shape memory performance is able to be further improved by immersed in HCl/EtOH solution. The glassy-to-rubbery modulus ratio (E′g/E′r) of the PVA/EP-HCl/EtOH is about 650 after immersed in 0.1 mol/L HCl/EtOH for 6 h. In addition, this immersed method also can solve the post curing problem of such cationic photocuring. It is an easy, efficient, economical strategy for improving synergistic water-driven shape memory performance. Furthermore, this shape memory composite is expected to provide new perspective and practical approach to realize the intellectualization of underwater deployment and release structure.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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