| 水溶液中聚乙烯基吡咯烷酮与十二烷基硫酸钠的相互作用机理 |
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| 引用本文： | 陈晓明,杨海洋,何平笙.水溶液中聚乙烯基吡咯烷酮与十二烷基硫酸钠的相互作用机理[J].高分子材料科学与工程,2011(1):50-53. |
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| 作者姓名： | 陈晓明 杨海洋 何平笙 |
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| 作者单位： | 中国科学技术大学高分子科学与工程系; |
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| 基金项目： | 高等学校博士学科点专项基金(20040358018)资助课题 |
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| 摘 要： | 利用黏度、电导、表面张力和荧光光谱实验手段研究了聚乙烯基吡咯烷酮(PVP)和十二烷基硫酸钠(SDS)在水溶液中的相互作用,发现对SDS来说存在三个不同的特征浓度:临界聚集浓度(CAC)、CAC2和高分子饱和浓度(PSP)。实验结果表明,PVP和SDS在水溶液中的相互作用可以用类似于描述聚电解质和带相反电荷表面活性剂之间相互作用的两阶段模型解释:初始阶段(CSDS>CAC),带负电荷的SDS分子主要以单个的方式吸附到PVP带正电的侧基上;第二阶段(CSDS>CAC2),SDS分子通过疏水相互作用以协同的方式吸附到PVP分子链上形成胶束,在浓度为PSP时达到饱和。
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| 关 键 词： | 聚乙烯基吡咯烷酮 十二烷基硫酸钠 两阶段模型 疏水相互作用 |
Mechanism on the Interaction Between Poly(N-Vinyl Pyrrolidone) and Sodium Dodecyl Sulfate in Aqueous Solutions |
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| Xiaoming Chen,Haiyang Yang,Pingsheng He.Mechanism on the Interaction Between Poly(N-Vinyl Pyrrolidone) and Sodium Dodecyl Sulfate in Aqueous Solutions[J].Polymer Materials Science & Engineering,2011(1):50-53. |
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| Authors: | Xiaoming Chen Haiyang Yang Pingsheng He |
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| Affiliation: | Xiaoming Chen,Haiyang Yang,Pingsheng He(Department Polymer Science & Engineering,University of Science & Technology of China,Hefei 230026,China) |
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| Abstract: | The interaction of poly(N-vinyl pyrrolidone)(PVP) with sodium dodecyl sulfate (SDS) in aqueous solution was investigated using viscosity,conductivity,surface tension and steady-state fluorescence measurement.It has been found that three critical concentrations of SDS,referred to as critical aggregation concentration(CAC),CAC2 and polymer saturation point(PSP) respectively,can be detected.The experimental results indicate that the mechanism on the interaction of PVP with SDS in aqueous solution can be explai... |
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| Keywords: | poly(N-vinyl pyrrolidone) sodium dodecyl sulfate two-stage model hydrophobic interaction |
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