聚三甲硅基丙炔膜表面改性的XPS研究——Ⅰ.用N-溴代丁二酰亚胺的表面改性

XPS Studies on Surface Modified Poly [1-trimethylsilyl)-1-Propyne] Membranes 1. Surface Modification by N-Bromosuccinimide

用N-溴代丁二酰亚胺的丙酮溶液在回流温度下对三甲硅基丙炔的均聚物和共聚物作了表面改性。XPS的研究表明,试样表面层中Br原子含量随溴化时间的增长而增加,C_(IS)谱变宽且产生来自C-O和C-Br结构的新谱线。红外光谱证明溴化反应产生CH_2Br结构。溴化使膜的气透性发生相应的变化,即α_(O_2/N_2)值增高,P_(O_2)值降低。

Poly[1-(trimethylsilyl)-1-propynel membrane surface has been modified in anacetone solution of N-bromosuccinimide under the refluxing temperature XPs resultsshowed that Br contents in the surface incerased with the bromination times and thatin C_(is) spectra there were new components which can be assigned to C-Br and C-Obands IR spectra showed that the bromination mainly took place in α-CH_3 to giveCH_2 Br structure With the bromination gas separation factor α_(O_2/N_2) increasedand the permeability coefficients for oxygen and nitrogen decreased in the membranes.