紫外光谱研究PDDA/PSS多层膜组装盐效应  

Salt Effect of PDDA/PSS Self-Assembled Multilayer Films by UV-Vis Spectrometry

作　　者：李景侠[1] 马凤仙[1] 

机构地区：[1]三门峡职业技术学院生化工程系

出　　处：《光谱实验室》2013年第2期763-766,共4页Chinese Journal of Spectroscopy Laboratory

摘　　要：以阳离子聚电解质聚二甲基二烯丙基氯化铵(PDDA)与阴离子聚苯乙烯磺酸钠(PSS)通过逐层组装,在石英表面构建了多层膜,并用紫外-可见光谱仪(UV-Vis)跟踪监测,考察聚电解质中添加NaCl的浓度变化对组装过程的影响。结果显示:PDDA/PSS组装膜在前7层均呈现较好的指数关系,由所得回归方程可知,自组装膜的增长量主要与回归参数q=exp(1/t_1)有关,而q与盐的浓度呈正比,说明随着盐度的增加,所得多层膜的组装量也相应增加;PDDA/PSS组装多层膜在8—13层呈现较好的线性增长模式。随着盐度的增加,回归直线的斜率越大。但当盐度足够大时,所得回归直线斜率增速减慢,表明此时盐度对组装膜的影响减弱。The morphology of multilayer films was assembled onto surface on quartz from poly （dimethyldialty ammonium chloride）（PDDA） and poly （sodium styrensuyonate）（PSS） by layer by layer,UV-Vis spectrophotometry was used to track and monitor,and the influences of changing NaC1 concentration in polyelectrolyte on process of assembly were investigated. The results showed that the assembly amount of multilayer exponentially grew with the number of bilayers （1-7 bilayers）, the increment of assembling films was related with regression parameter q = exp （1/t1） , that was proportional with salt concentration, results showed that concentration of salt increased along with increase of assembly amount of multilayer films. All of the PDDA/PSS films （n = 8-13 bilayers） linearly grew with the number of bilayers along with the increase of the NaCl concentration,and the slope of the linear regression equation was more greater. When the NaCl concentration was high enough, the increasing speed of slope descended, that showed that the influence of the concentration of salt on assembling films became decreased.

关 键 词：逐层自组装 聚电解质 紫外-可见光谱 

分 类 号：O657.32[理学—分析化学]