A fluorine-based strong and healable elastomer with unprecedented puncture resistance for high performance flexible electronics

Yujie Jia ¹Qingbao Guan ¹Chengzhen Chu ¹Luzhi Zhang ¹Rasoul Esmaeely Neisiany ²Shijia Gu ¹Junfen Sun ¹Zhengwei You¹

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作者信息

1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,Institute of Functional Materials,College of Materials Science and Engineering,Research Base of Textile Materials for Flexible Electronics and Biomedical Applications(China Textile Engineering Society),Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine,Donghua University,Shanghai 201620,China
2. Biotechnology Centre,Silesian University of Technology,Gliwice 44-100,Poland;Department of Polymer Engineering,Hakim Sabzevari University,Sabzevar 9617976487,Iran
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Abstract

There is usually a trade-off between high mechanical strength and dynamic self-healing because the mechanisms of these properties are mutually exclusive.Herein,we design and fabricate a fluorinated phenolic polyurethane(FPPU)elastomer based on octafluoro-4,4'-biphenol to overcome this challenge.This fluorine-based motif not only tunes interchain interactions through π-π stacking between aromatic rings and free-volume among polymer chains but also improves the reversibility of phenol-carbamate bonds via electron-withdrawing effect of fluorine atoms.The developed FPPU elastomer shows the high-est recorded puncture energy(648.0 mJ),high tensile strength(27.0 MPa),as well as excellent self-healing efficiency(92.3％),along with low surface energy(50.9 MJ m-2),notch-insensitivity,and repro-cessability compared with non-fluorinated counterpart biphenolic polyurethane(BPPU)elastomer.Taking advantage of the above-mentioned merits of FPPU elastomer,we prepare an anti-fouling tribo-electric nanogenerator(TENG)with a self-healable,and reprocessable elastic substrate.Benefiting from stronger electron affinity of fluorine atoms than hydrogen atoms,this electronic device exhibits ultrahigh peak open-circuit voltage of 302.3 V compared to the TENG fabricated from BPPU elastomer.Furthermore,a healable and stretchable conductive composite is prepared.This research provides a dis-tinct and general pathway toward constructing high-performance elastomers and will enable a series of new applications.

Key words

Fluorinated elastomer/Polyurethane/Phenol-carbamate bonds/Self-healing/Reprocessable

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基金项目

National Natural Science Foundation of China(52173117)

National Natural Science Foundation of China(52073049)

National Natural Science Foundation of China(21991123)

National Key Research and Development Program of China(2021YFC2101800)

National Key Research and Development Program of China(2021YFC2400802)

Ningbo 2025 Science and Technology Major Project(2019B10068)

Natural Science Foundation of Shanghai(22ZR1400700)

Shanghai Rising-Star Program(21QA1400200)

Science and Technology Commission of Shanghai Municipality(20DZ2254900)

Science and Technology Commission of Shanghai Municipality(20DZ2270800)

出版年

2024

科学通报(英文版)

中国科学院

科学通报(英文版)

CSTPCD

ISSN：1001-6538

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