Magnetic Field Triggered Multicycle Damage Sensing and Self Healing

Scientific Reports
Anansa S Ahmed, Raju V Ramanujan

Abstract

Multifunctional materials inspired by biological structures have attracted great interest, e.g. for wearable/ flexible "skin" and smart coatings. A current challenge in this area is to develop an artificial material which mimics biological skin by simultaneously displaying color change on damage as well as self healing of the damaged region. Here we report, for the first time, the development of a damage sensing and self healing magnet-polymer composite (Magpol), which actively responds to an external magnetic field. We incorporated reversible sensing using mechanochromic molecules in a shape memory thermoplastic matrix. Exposure to an alternating magnetic field (AMF) triggers shape recovery and facilitates damage repair. Magpol exhibited a linear strain response upto 150% strain and complete recovery after healing. We have demonstrated the use of this concept in a reusable biomedical device i.e., coated guidewires. Our findings offer a new synergistic method to bestow multifunctionality for applications ranging from medical device coatings to adaptive wing structures.

References

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Citations

Feb 24, 2017·Advanced Materials·Tan-Phat HuynhHossam Haick
Nov 17, 2016·Science Advances·Amay J BandodkarJoseph Wang
Mar 5, 2019·Advanced Healthcare Materials·Daniel CohnRaju Ramanujan
Dec 18, 2019·Nanoscale·Yang YangJinliang He
Aug 5, 2017·Scientific Reports·Hui SongJie Duan
Dec 22, 2020·Advanced Materials·Yu Jun TanBenjamin C K Tee
Nov 12, 2020·Advanced Science·Yang YangJinliang He
Aug 8, 2019·ACS Nano·Yun-Tzu HsuYang-Fang Chen
Sep 13, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Biyu JinFengqiu Chen

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Methods Mentioned

BETA
atomic force microscopy
X-ray
transmission electron microscopy
differential scanning calorimetry

Software Mentioned

EVA
Magpol

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