论文部分内容阅读
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。
Multilayers were fabricated on the surface of quartz by layer-by-layer assembly of cationic polydimethyldiallylammonium chloride (PDDA) and anionic sodium polystyrene sulfonate (PSS). UV-Vis spectroscopy -Vis) tracking and monitoring to investigate the polyelectrolyte added NaCl concentration changes on the assembly process. The results showed that the PDDA / PSS films showed a good exponential relationship in the first seven layers. From the regression equation, the growth of self-assembled films was mainly related to the regression parameter q = exp (1 / t_1) The results show that with the increase of salinity, the assembly amount of multi-layer films increases accordingly. PDDA / PSS multilayers show a good linear growth pattern in layers 8-13. As the salinity increases, the slope of the regression line increases. However, when the salinity is large enough, the slope of the regression line slopes slowed down, indicating that the effect of salinity on the assembly film is weakened at this time.