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

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

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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.

Fluorinated elastomerPolyurethanePhenol-carbamate bondsSelf-healingReprocessable

Yujie Jia、Qingbao Guan、Chengzhen Chu、Luzhi Zhang、Rasoul Esmaeely Neisiany、Shijia Gu、Junfen Sun、Zhengwei You

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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

Biotechnology Centre,Silesian University of Technology,Gliwice 44-100,Poland

Department of Polymer Engineering,Hakim Sabzevari University,Sabzevar 9617976487,Iran

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Key Research and Development Program of ChinaNational Key Research and Development Program of ChinaNingbo 2025 Science and Technology Major ProjectNatural Science Foundation of ShanghaiShanghai Rising-Star ProgramScience and Technology Commission of Shanghai MunicipalityScience and Technology Commission of Shanghai Municipality

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2024

10.1016/j.scib.2024.03.047

科学通报(英文版)
中国科学院

科学通报(英文版)

CSTPCD
ISSN：1001-6538
年,卷(期)：2024.69(12)