Issue 18, 2017

Super-tough, ultra-stretchable and strongly compressive hydrogels with core–shell latex particles inducing efficient aggregation of hydrophobic chains

Abstract

Toughness, strechability and compressibility for hydrogels were ordinarily balanced for their use as mechanically responsive materials. For example, macromolecular microsphere composite hydrogels with chemical crosslinking exhibited excellent compression strength and strechability, but poor tensile stress. Here, a novel strategy for the preparation of a super-tough, ultra-stretchable and strongly compressive hydrogel was proposed by introducing core–shell latex particles (LPs) as crosslinking centers for inducing efficient aggregation of hydrophobic chains. The core–shell LPs always maintained a spherical shape due to the presence of a hard core even by an external force and the soft shell could interact with hydrophobic chains due to hydrophobic interactions. As a result, the hydrogels reinforced by core–shell LPs exhibited not only a high tensile strength of 1.8 MPa and dramatic elongation of over 20 times, but also an excellent compressive performance of 13.5 MPa at a strain of 90%. The Mullins effect was verified for the validity of core–shell LP-reinforced hydrogels by inducing aggregation of hydrophobic chains. The novel strategy strives to provide a better avenue for designing and developing a new generation of hydrophobic association tough hydrogels with excellent mechanical properties.

Graphical abstract: Super-tough, ultra-stretchable and strongly compressive hydrogels with core–shell latex particles inducing efficient aggregation of hydrophobic chains

Article information

Article type
Paper
Submitted
27 Feb 2017
Accepted
08 Apr 2017
First published
10 Apr 2017

Soft Matter, 2017,13, 3352-3358

Super-tough, ultra-stretchable and strongly compressive hydrogels with core–shell latex particles inducing efficient aggregation of hydrophobic chains

X. Ren, C. Huang, L. Duan, B. Liu, L. Bu, S. Guan, J. Hou, H. Zhang and G. Gao, Soft Matter, 2017, 13, 3352 DOI: 10.1039/C7SM00415J

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