摘要
为了制备出同时具有优异力学性能和驱动性能的智能水凝胶材料,提出了一种简单有效的智能水凝胶制备方法——梯度矿化法,通过控制矿化反应在pH响应型水凝胶聚丙烯酰胺-co-2-丙烯酰胺基-2-甲基丙磺酸P(AAm-co-AMPS)内部的发生区域,将矿化产物引入到水凝胶内部并实现梯度分布,在提升水凝胶力学性能的同时赋予其驱动能力。结果表明:梯度矿化后的P(AAm-co-AMPS)水凝胶承受的压缩应力由170 kPa提升到400 kPa以上,且在压缩应变达到35%以上时依然保持结构的完整性;梯度矿化水凝胶具有原始水凝胶所不具备的驱动能力,实现了弯曲等驱动效果,在80 s的时间内弯曲角度达到了77°。梯度矿化法能够有效增强了P(AAm-co-AMPS)水凝胶的力学性能并赋予其驱动能力,研究结果为制备出性能更加优异的智能水凝胶材料提供了新的思路。
To prepare intelligent hydrogel materials with excellent mechanical properties and driving behaviors, gradient mineralization method is proposed as a simple and effective way to prepare intelligent hydrogel materials. By controlling the occurrence region of mineralization reaction in the pH-responsive hydrogel, polyacrylamide-co-2-acrylamide-2-methyl-propylsulfonic acid P(AAm-co-AMPS), the mineralization products were introduced into the hydrogel and gradient distribution was realized, which improved the mechanical properties of the hydrogel and endowed with driving ability. The results reveal that after gradient mineralization, the compressive stress that the P(AAm-co-AMPS) hydrogel can withstand increases from 170 kPa to more than 400 kPa, and the integrity of the structure is still maintained, even when the compressive stress is above 35%. The gradient mineralized hydrogel has the driving ability that the original hydrogel does not have and achieves bending and other driving effects. The bending angle is up to 77° within 80 s. Gradient mineralization can effectively improve the mechanical properties of P(AAm-co-AMPS) hydrogel and endow it with driving ability. The research results provide a new idea for the preparation of intelligent hydrogel materials with better performance.
作者
姚游星
许为中
刘爱萍
YAO Youxing;XU Weizhong;LIU Aiping(School of Science,Zhejiang Sci-Tech University,Hangzhou 310018,China)
出处
《浙江理工大学学报（自然科学版）》
2022年第2期188-194,共7页
Journal of Zhejiang Sci-Tech University(Natural Sciences)
基金
国家自然科学基金项目(51572242)。
关键词
水凝胶
梯度矿化
各向异性
力学性能
驱动行为
hydrogel
gradient mineralization
anisotropy
mechanical properties
driving behavior
