化学响应水凝胶的扩散泳快速溶胀
软凝聚态物质
2024-01-24 v2
摘要
观察到聚丙烯酸水凝胶（具有对离子和酸通量完全通透的自由表面）的酸诱导储离子释放会提高凝胶渗透压，从而导致比凝胶特征溶剂吸收速率更快的暂时性快速溶胀。本文我们发展了一种连续介质孔隙弹性理论，通过引入“凝胶扩散泳（gel diffusio-phoresis）”机制定量解释实验：凝胶聚合物与释放离子间的空间排斥可诱导扩散渗透溶剂吸入，并被凝胶网络的扩散泳膨胀所抵消。对于从药物递送到软体机器人等应用，设计凝胶扩散泳或可实现具有放大应变率和功率输出的刺激响应水凝胶。
引用
@article{arxiv.2309.05165,
title = {Diffusio-phoretic fast swelling of chemically responsive hydrogels},
author = {Chinmay Katke and Peter A. Korevaar and C. Nadir Kaplan},
journal= {arXiv preprint arXiv:2309.05165},
year = {2024}
}
备注
The proposed gel diffusio-phoresis mechanism is detailed on p. 1, column 2, and in the revised Figure 1 (along with its revised caption). We have added additional statements to explain the contributions to the equations that were not specified in the previous version (p.2, 1st column, 2nd paragraph; p.3, 1st column, following Eqs.5, 6, and 7). New supplementary sections S1 and S4 are added