Key Lab of Science and Technology of Eco-textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, People's Republic of China; Innovation Center for Textile Science and Technology of DHU, Donghua University, Shanghai, 201620, People's Republic of China.
Key Lab of Science and Technology of Eco-textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, People's Republic of China; Innovation Center for Textile Science and Technology of DHU, Donghua University, Shanghai, 201620, People's Republic of China.
Carbohydr Polym. 2021 Mar 1;255:117331. doi: 10.1016/j.carbpol.2020.117331. Epub 2020 Nov 3.
Recently, integration of self-healing, color-tunable, sol-gel converted properties into hydrogel has attracted interest for preparing a reinforced multifunctional hydrogel. Herein, acidochromic regenerated cellulose (ARC) was incorporated into the polyvinyl alcohol/borax (PB) matrix for constructing a tough, self-healing, multicolor and sol-gel converted smart hydrogel (PB/ARC). The mechanical properties of PB/ARC hydrogel were improved after introducing ARC, which could bear a weight of 200 g and had high maximum tensile strength (6.8 times) and compressive strength (2.3 times). PB/ARC hydrogel automatically fused within 15 s after being cut and quickly recovered to the original state after being subjected to high shear strain, showing excellent self-healing ability. The color of hydrogel could be tuned between yellow and purple by altering pH values (5-12). In addition, PB/ARC hydrogel exhibited reversible sol-gel conversion in response to the change of acidity and alkalinity. This study offers a new and facile strategy for developing multifunctional smart hydrogel.
最近，将自修复、颜色可调、溶胶-凝胶转化性能集成到水凝胶中，引起了人们制备增强型多功能水凝胶的兴趣。本文将酸致变色再生纤维素（ARC）掺入到聚乙烯醇/硼砂（PB）基质中，构建了一种坚韧、自修复、多色和溶胶-凝胶转化的智能水凝胶（PB/ARC）。引入 ARC 后，PB/ARC 水凝胶的力学性能得到了提高，能够承受 200g 的重量，具有较高的最大拉伸强度（提高了 6.8 倍）和压缩强度（提高了 2.3 倍）。PB/ARC 水凝胶在切割后 15 秒内自动融合，并在经受高剪切应变后迅速恢复到原始状态，表现出优异的自修复能力。通过改变 pH 值（5-12），水凝胶的颜色可以在黄色和紫色之间进行调节。此外，PB/ARC 水凝胶对酸碱性的变化表现出可逆的溶胶-凝胶转化。本研究为开发多功能智能水凝胶提供了一种新的简便策略。
