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Open AccessReview

A Brief Review of the Shape Memory Phenomena in Polymers and Their Typical Sensor Applications

1
School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China
2
School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
3
School of Materials Engineering, Jiangsu University of Technology, Changzhou 213001, China
4
College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, China
5
School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
*
Author to whom correspondence should be addressed.
Currently with Chiba Technical Center, AGC Chemicals, Ichihara 2908566, Japan.
Polymers 2019, 11(6), 1049; https://doi.org/10.3390/polym11061049
Received: 23 April 2019 / Revised: 11 June 2019 / Accepted: 13 June 2019 / Published: 15 June 2019
(This article belongs to the Special Issue Shape Memory Polymers III)
In this brief review, an introduction of the underlying mechanisms for the shape memory effect (SME) and various shape memory phenomena in polymers is presented first. After that, a summary of typical applications in sensors based on either heating or wetting activated shape recovery using largely commercial engineering polymers, which are programmed by means of in-plane pre-deformation (load applied in the length/width direction) or out-of-plane pre-deformation (load applied in the thickness direction), is presented. As demonstrated by a number of examples, many low-cost engineering polymers are well suited to, for instance, anti-counterfeit and over-heating/wetting monitoring applications via visual sensation and/or tactual sensation, and many existing technologies and products (e.g., holography, 3D printing, nano-imprinting, electro-spinning, lenticular lens, Fresnel lens, QR/bar code, Moiré pattern, FRID, structural coloring, etc.) can be integrated with the shape memory feature. View Full-Text
Keywords: shape memory material; shape memory polymer; sensor; anti-counterfeit; temperature sensor; wetting sensor shape memory material; shape memory polymer; sensor; anti-counterfeit; temperature sensor; wetting sensor
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MDPI and ACS Style

Sun, L.; Wang, T.X.; Chen, H.M.; Salvekar, A.V.; Naveen, B.S.; Xu, Q.; Weng, Y.; Guo, X.; Chen, Y.; Huang, W.M. A Brief Review of the Shape Memory Phenomena in Polymers and Their Typical Sensor Applications. Polymers 2019, 11, 1049.

AMA Style

Sun L, Wang TX, Chen HM, Salvekar AV, Naveen BS, Xu Q, Weng Y, Guo X, Chen Y, Huang WM. A Brief Review of the Shape Memory Phenomena in Polymers and Their Typical Sensor Applications. Polymers. 2019; 11(6):1049.

Chicago/Turabian Style

Sun, Li; Wang, Tao X.; Chen, Hong M.; Salvekar, Abhijit V.; Naveen, Balasundaram S.; Xu, Qinwei; Weng, Yiwei; Guo, Xinli; Chen, Yahui; Huang, Wei M. 2019. "A Brief Review of the Shape Memory Phenomena in Polymers and Their Typical Sensor Applications" Polymers 11, no. 6: 1049.

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Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

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