Nanoclay-Based Self-Supporting Responsive Nanocomposite Hydrogels for Printing Applications

ACS Applied Materials & Interfaces
Yifei JinYong Huang

Abstract

Stimuli-responsive hydrogels and/or composite hydrogels have been of great interest for various printing applications including four-dimensional printing. Although various responsive hydrogels and/or composite hydrogels have been found to respond to given stimuli and change shapes as designed, the fabrication of three-dimensional (3D) structures from such responsive hydrogels is still a challenge due to their poor 3D printability, and most of the responsive material-based patterns are two-dimensional (2D) in nature. In this study, Laponite nanoclay is studied as an effective additive to improve the self-supporting printability of N-isopropylacrylamide (NIPAAm), a thermoresponsive hydrogel precursor while keeping the responsive functionality of NIPAAm. Graphene oxide (GO) is further added as a nanoscale heater, responding to near-infrared radiation. Due to the different shrinking ratios and mechanical properties of the poly( N-isopropylacrylamide) (pNIPAAm)-Laponite and pNIPAAm-Laponite-GO nanocomposite hydrogels, printed 2D patterns deform in a predictable way. In addition, 3D microfluidic valves are directly printed and cured in air, which can effectively control the flow directions in response to different stimuli as validate...Continue Reading

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Citations

Oct 2, 2020·Advanced Science·Zhen JiangLuke A Connal
Nov 17, 2020·Journal of Tissue Engineering·Nathalie SällströmSimon Martin
Jan 24, 2021·Carbohydrate Polymers·Shaohua GuYali Ji
Apr 4, 2021·Polymers·Emma Barrett-CattonPrashanth Asuri
May 1, 2021·Materials·Cristina RamírezMaria Isabel Osendi
Jan 30, 2019·ACS Applied Materials & Interfaces·Jiayu LiuDavid H Gracias
Dec 16, 2020·ACS Applied Materials & Interfaces·Si Yu ZhengQiang Zheng
Sep 14, 2021·ACS Biomaterials Science & Engineering·Hossein RavanbakhshYu Shrike Zhang

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