摘要
以疏水纳米二氧化硅溶胶作硅橡胶的补强材料,制成了硅橡胶-聚酰胺(PDMS-PA)复合膜;用扫描电镜观察了其断面形态,考察了复合膜对醇-水溶液的渗透蒸发分离效果及耐用性,并与气相法白炭黑补强PDMS-PA复合膜进行了比较。结果表明,与气相法白炭黑补强PDMS-PA复合膜相比,硅溶胶补强的PDMS-PA复合膜的PDMS皮层和PA支撑层之间的结合更紧密,但分离因子和渗透通量下降。在相同条件下进行醇-水分离实验后,气相法白炭黑补强PDMS-PA复合膜出现PDMS皮层与PA支撑层分离现象;而硅溶胶补强PDMS-PA复合膜的PDMS皮层与PA支撑层结合完好。表明用硅溶胶作107硅橡胶的补强填料时能在PDMS-PA复合膜的渗透汽化性能略有下降的情况下改善PDMS皮层与PA支撑层之间的结合,提高复合膜的耐用性,使其具有工业使用价值。
The PDMS-PA composite membrane was prepared with 107 silicone rubber with hydropho- bic nano-silica sol as reinforcement. Scanning electronic microscopy was used to study the cross-section, and the pervaporation performances and durability of the composite films on ethanol aqueous solution. The results were then compared with fumed-silica PDMS-PA membrane. It was shown that using silica sol as reinforcement for 107 silicone rubber could improve the adhesion of PDMS cortex layer and PA support layer on the composite PDMS-PA membrane, which could improve the durability of the filled membrane film.
出处
《有机硅材料》
CAS
2008年第3期115-118,共4页
Silicone Material
基金
自然科学基金项目(20276041
20776088)
