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纳米ZnO表面吸附聚电解质及其分散体系稳定性的研究 被引量:2

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摘要 讨论了纳米ZnO颗粒表面吸附阴离子型聚电解质(马来酸酐钠盐聚合物)及其水分散体系的稳定性.FTIR分析表明,ZnO颗粒表面通过氢键和化学键吸附聚电解质.吸附行为受聚电解质浓度、pH值和离子强度的影响.随着pH值的增大,饱和吸附量减小,而吸附层厚度增大.饱和吸附量和吸附层厚度随离子强度的增大呈先增加后减小的趋势.与相同浓度的NaCl溶液相比,聚电解质在CaCl2溶液中的饱和吸附量较大,相应的吸附层厚度也较大.pH值的增大,分散体系吸光度变化缓慢,分散体系稳定性好.分散体系吸光度随聚电解质浓度的变化有极大值.分散体系稳定性的变化规律是由聚电解质在颗粒表面吸附构型变化而引起.
出处 《科学通报》 EI CAS CSCD 北大核心 2005年第12期1184-1189,共6页 Chinese Science Bulletin
基金 湖南省科技攻关项目(批准号:03GKY3011)
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同被引文献30

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