摘要
研究了一种亲水 疏水型半互穿网络水凝胶 (PAAc QPVPDgels)对直流电场的刺激应答 .该凝胶中的疏水型N 十二烷基聚 (4 乙烯吡啶 )溴化盐 (QPVPD)高分子链与亲水型聚丙烯酸水凝胶 (PAAc)网络通过物理缠绕复合 .由于疏水力和亲水力的共同作用 ,在接触电场下 ,该凝胶在阳极端发生消溶胀 ,疏水相互作用对消溶胀有一定的影响 ;在非接触电场下 ,该凝胶在弱碱性溶液中迅速向阴极方向弯曲 ,在弱酸性溶液中首先发生消溶胀 。
The stimuli-response of hydrophilic-hydrophobic semi-IPN hydrogels consisted of polyacrylic acid (PAAc)/poly ( N- dodecyl-4-vinyl pyridinium bromide) ( QPVPD) under DC electric field was investigated. The QPVPD chains were entangled with the PAAc polymer network and were fixed in the semi-IPN hydrogels. Under the contact electric fields, the deswelling of the gel was observed in the anode side of the gel, which was attributed to the hydrophobic interaction. Under the non-contact electric field, the gel bars bend toward the cathode side in a weak alkaline solution (pH = 9) but toward anode side in a weak acidic solution (pH = 4). These properties of the gel are related to both the change of hydrophilic interaction and hydrophobic interaction.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2002年第1期25-29,共5页
Acta Polymerica Sinica
基金
国家自然科学基金资助项目 (基金号 2 95 7416 0 )
河南省教委科研规划项目 (项目号 9715 0 0 17)
