School of Chemical Engineering, Changchun University of Technology, Changchun 130012, China.
Department of Gastrointestinal Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.
Int J Biol Macromol. 2024 Nov;279(Pt 4):135468. doi: 10.1016/j.ijbiomac.2024.135468. Epub 2024 Sep 12.
A novel composite hydrogel prepared from polyacrylamide (PAM), polydopamine-modified montmorillonite (PDA@MMT), graphene and hydroxypropyl cellulose (HPC), loaded with Ag NPs, was prepared for the catalytic degradation of methylene blue (MB) and Congo red (CR) using in situ reduction. HPC significantly enhanced the dispersion of PDA@MMT within the hydrogel, endowing the hydrogel with excellent mechanical properties, with stress and strain of 1773 kPa and 4005 %, and elastic modulus and toughness of 43.4 kPa and 29.54 MJ/m, respectively. The introduction of graphene (GN) increased the rate of electron transfer during the catalytic process and significantly improved the catalytic efficiency, with catalytic rate constants of 1.360 and 0.803 min for MB and CR at 20 °C, respectively. The hydrogels were endowed with excellent antimicrobial properties due to the introduction of Ag NPs. In the future, this hydrogel is expected to play an important role in environmental pollution control.
一种新型的复合水凝胶，由聚丙烯酰胺（PAM）、聚多巴胺修饰的蒙脱石（PDA@MMT）、石墨烯和羟丙基纤维素（HPC）组成，负载银纳米粒子（Ag NPs），通过原位还原用于催化降解亚甲基蓝（MB）和刚果红（CR）。HPC 显著提高了 PDA@MMT 在水凝胶中的分散性，赋予水凝胶优异的机械性能，其应力和应变分别为 1773 kPa 和 4005%，弹性模量和韧性分别为 43.4 kPa 和 29.54 MJ/m。石墨烯（GN）的引入增加了催化过程中的电子转移速率，显著提高了催化效率，在 20°C 下，MB 和 CR 的催化速率常数分别为 1.360 和 0.803 min。由于引入了 Ag NPs，水凝胶具有优异的抗菌性能。未来，这种水凝胶有望在环境污染控制中发挥重要作用。
