引用本文:
张建合. 亲水/疏水半互穿网络凝胶对温度的响应[J]. 物理化学学报,
2003, 19(01): 90-93.
doi:
10.3866/PKU.WHXB20030121
Citation: Zhang Jian-He. Stimuli-response of Hydrophilic-hydrophobic Semi-IPN Hydrogels on Temperature[J]. Acta Physico-Chimica Sinica, 2003, 19(01): 90-93. doi: 10.3866/PKU.WHXB20030121
Citation: Zhang Jian-He. Stimuli-response of Hydrophilic-hydrophobic Semi-IPN Hydrogels on Temperature[J]. Acta Physico-Chimica Sinica, 2003, 19(01): 90-93. doi: 10.3866/PKU.WHXB20030121
亲水/疏水半互穿网络凝胶对温度的响应
摘要:
研究了一种亲水/疏水型半互穿网水凝胶（PAAc/QPVPD gels）对温度的刺激响应.在弱酸性或弱碱性（pH=7.5）溶液中,该凝胶的溶胀比在低温区（< 28 ℃）随温度的升高微微增大,约在28 ℃出现最大值,然后随温度升高而迅速减小,温度约为32.5 ℃时溶胀比趋于最低值.这主要是由于聚丙烯酸网络(PAAc)中氢键的解离与疏水改性聚电解质N-正十二烷基聚（4-乙烯吡啶）溴化盐(QPVPD)的疏水相互作用共同引起的.
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关键词:
- 水凝胶;半互穿网络;温度响应;溶胀
English
Stimuli-response of Hydrophilic-hydrophobic Semi-IPN Hydrogels on Temperature
Abstract:
The Stimuli-response of hydrophilic-hydrophobic semi-IPN hydrogels consisting of polyacrylic acid (PAAc)/ poly(N-dodecyl-4-vinyl pyridinium bromide) (QPVPD) with temperature was investigated in weak alkaline and acid solution .Swelling ratio (SR) of the gels increases slowly with the increasing of temperature initially, and reaches a maximum at 28 ℃,then decreases rapidly, and reaches a minimum at 32.5 ℃.This phenomenon is mainly explained by the dissociation of hydrogen bonding in PAAc network and hydrophobic interaction of QPVPD.
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