丙烯酸水凝胶的pH敏感性研究 |
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引用本文: | 陆大年,陈士安.丙烯酸水凝胶的pH敏感性研究[J].华东理工大学学报(自然科学版),1994,20(6):818-823. |
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作者姓名: | 陆大年 陈士安 |
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作者单位: | 华东理工大学化学系,中国纺织大学纺织化学工程系 |
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摘 要: | 测定并研究了各种丙烯酸水凝胶的pH溶胀曲线及其影响因素。实验表明:随着交联剂含量,单体浓度的增加,会使凝胶的最大溶胀比显著减弱。这可能是网络中非高斯短链及勾结链增多的原故。
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关 键 词: | 丙烯酸 水凝胶 pH敏感性 |
Studies on the pH-sensitivity of Acrylic-Acid Hydrogels |
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Abstract: | The pH-sensitive swelling isothems of various acrylic acid hydrogels were mea-sured.Generally ,the Columbic interactions inside the gel network and the Donnan equilibriabetween the network and bulk solution are two main factors affecting the swelling behaviorof pH-sensitively hydrogels.The type and the amount of the cross-linking agent and the con-centration of the monomer used during the preparation of gels can effectively modify the net-work structure,therefore,can change the appearance of awelling isotherms.Besides,the prob-ability of forming non-gaussian short chains andleading to the entanglement of chains isgreatly enhanced with the increase of the amount of the cross-linking agent and the concen-tration of the monomers. As a consequence,the maximum swelling ratio is notably reduced. |
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Keywords: | acrylic acid hydrogels pH-sensitivity sensitive hydrogels swelling curve 1)Department of Textile chemieal Engineering China Textile University Shanghai 200251 |
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