Swelling and electric-sensitive characteristics of poly-cation PVA hydrogel membrane in aqueous NaCl solution
A novel polycation PVA (CAPVA) hydrogel membrane crosslinked with glutaraldehyde has been prepared by quaternizing polyvinyl alcohol (PVA) with glycidyltrimethylammonium chloride (GTMAC) and using KOH as catalyst under ultrasound, and its swelling and electric-sensitive characteristics in aqueous NaCl solution were studied. The results indicated that the water take-up of CAPVA hydrogel membrane decreased as the concentration of NaCl solution increased. The hydrogel membrane bended toward the anode under a non-contact dc electric field in NaCl aqueous solution. The bending speed and deflection of the hydrogel membrane increased with the increasing of applied voltage. The electric-sensitive characteristic of the hydrogel membrane was also affected by the electrolyte concentration of external NaCl solution, and there is a critical ionic strength of 0.02 at which its bending speed and equilibrium strain reached the maximum value. Under a cyclically varying electric field, the hydrogel membrane exhibited a good reversible bending behavior.
LIU Genqi XIAO Jun YANG Shiwen
Department of Applied Chemistry, Northwestern Polytechnical University ，Chang’an District, Xi’an Department of Applied Chemistry, Northwestern Polytechnical University ， Chang’an District, Xi’an
国际会议
2009 International Conference on Advanced Fibers and Polymer Materials(2009年先进纤维与聚合物材料国际学术会议)
上海
英文
735-738
2009-10-21（万方平台首次上网日期，不代表论文的发表时间）