Hydrogen-bonding-supported self-healing antifogging thin films

Scientific Reports
Xiaojie Zhang, Junhui He

Abstract

Inspired by the repair of DNA through efficient reformation of hydrogen bonds (H-bonds), herein we report a facile one-step approach to construction of self-healing antifogging thin films on the basis of partly cross-linked poly(vinyl alcohol)(PVA) and poly(acrylic acid)(PAA). By designing the molar ratio of hydroxyl groups to carboxyl groups, the cross-linked polymer thin films maintain abundant free hydroxyl groups to present excellent antifogging property, which is derived from the hydrophilicity and hygroscopicity of the thin films. The thin films showed smart intrinsic self-healing characteristics towards wounds caused by external forces, which is attributed to sufficient free hydroxyl groups at the scratched interfaces to reform H-bonds across the interfaces and a sufficient chain mobility that is indispensable for chain diffusion across the interfaces and hydroxyl groups association to form H-bonds. No synthetic surfaces reported so far possess all the unique characteristics of the polymer thin films: intrinsic self-healing, long-term antifogging, excellent mechanical property, high transmittance and large-scale feasibility.

References

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Citations

Feb 5, 2016·ACS Applied Materials & Interfaces·Matt W EnglandAtsushi Hozumi
Mar 16, 2016·ACS Applied Materials & Interfaces·Jie ZhaoWeihua Ming
Aug 26, 2016·ACS Applied Materials & Interfaces·Jieun KoYoun Sang Kim
Jul 15, 2015·Chemical Communications : Chem Comm·Xiaojie Zhang, Junhui He
Jun 21, 2017·ACS Applied Materials & Interfaces·Chuan LiXiaoyan Yuan
Jun 4, 2016·Chemical Communications : Chem Comm·Liqi SiXiaoqun Zhu
Jan 29, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Kurtuluş YılmazMustafa Karaman
Aug 23, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Ying WangWanguo Zheng
May 12, 2020·ACS Applied Materials & Interfaces·Kai FengGaojian Chen

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Methods Mentioned

BETA
thermal treatment
scanning electron microscopy
infrared spectroscopy
light scattering
quartz crystal microbalance

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