A Spider-Silk-Inspired Wet Adhesive with Supercold Tolerance

被引：90

作者：

Liu, Xi ^{[1
,2
]}

Shi, Lianxin ^{[1
]}

Wan, Xizi ^{[1
,2
]}

Dai, Bing ^{[1
]}

Yang, Man ^{[1
]}

Gu, Zhen ^{[1
,3
]}

Shi, Xinghua ^{[2
,4
]}

Jiang, Lei ^{[1
,2
]}

Wang, Shutao ^{[2
]}

机构：

[1] Chinese Acad Sci, Tech Inst Phys & Chem, CAS Ctr Excellence Nanosci, CAS Key Lab Bioinspired Mat & Interfacial Sci, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Univ Sci & Technol Beijing, Dept Chem & Biol Engn, Beijing 100083, Peoples R China

[4] Chinese Acad Sci, Natl Ctr Nanosci & Technol, CAS Ctr Excellence Nanosci, Lab Theoret & Computat Nanosci,Key Lab Nanosyst &, Beijing 100190, Peoples R China

来源：

ADVANCED MATERIALS | 2021年 / 33卷 / 14期

基金：

中国国家自然科学基金;

关键词：

adhesive; bioinspired materials; core– sheath fibers; supercold tolerance; wet adhesion; POLYVINYLPYRROLIDONE; FIBERS; WATER;

D O I：

10.1002/adma.202007301

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Conventional adhesives often encounter interfacial failure in humid conditions due to small droplets of water condensed on surface, but spider silks can capture prey in such environment. Here a robust spider-silk-inspired wet adhesive (SA) composed of core-sheath nanostructured fibers with hygroscopic adhesive nanosheath (poly(vinylpyrrolidone)) and supporting nanocore (polyurethane) is reported. The wet adhesion of the SA is achieved by a unique dissolving-wetting-adhering process of core-sheath nanostructured fibers, revealed by in situ observations at macro- and microscales. Further, the SA maintains reliable adhesion on wet and cold substrates from 4 to -196 degrees C and even tolerates splashing, violent shaking, and weight loading in liquid nitrogen (-196 degrees C), showing promising applicability in cryogenic environments. This study will provide an innovative route to design functional wet adhesives.

引用

页数：8

共 44 条

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