摘要
以聚苯乙烯和正硅酸乙酯的有机溶液为铸膜溶液,利用Breath Figure法制备了PS/SiO2 Honeycomb结构复合膜.采用SEM对复合膜进行了形貌分析,探讨了聚合物浓度、PS/TEOS配比、聚合物的结构、溶剂等对膜Honeycomb结构的影响.研究结果表明,聚合物浓度在20～50mg/mL,PS/TEOS质量比大于2∶1的条件下可以制备结构完整的多孔膜,且制备的Honeycomb结构在0.8cm2内无缺陷;采用双羧基封端的聚苯乙烯成膜效果好于单羧基封端的成膜效果;以氯仿和苯作为溶剂均可以制备完全Honeycomb结构的复合膜,但以苯为溶剂制备的多孔膜孔径较大.成膜中TEOS水解不完全,复合膜中混杂着未完全水解的TEOS以及SiO2.EDS面扫描分析表明,Si和O均匀地分散在复合膜中.
PS/SiO2 organic-inorganic hybrid films with honeycomb patterns were prepared by Breath Figure method using organic solution of polystyrene and TEOS as casting solution. The prepared films were characterized by SEM, EDS, FTIR and XRD. Some effects such as PS concentration, PS/TEOS mass ratio, PS structure and solvent type were investigated. The results show that the perfect Honeycomb pattern films without defects within area of 0. 8 cm^2 can be obtained at the PS concentration ranges from 20 mg/mL to 50 mg/mL and PS/TEOS mass ratio less than 2. The films east from the chloroform solution of dicarboxyl terminated PS were more perfect than those cast from the chloroform solution of monocarboxyl terminated PS. The perfect Honeycomb structure films could be obtained with both chloroform and benzene as solvents, but the pore diameter of films east from benzene solution of PS was larger than that of films east from chloroform solution of PS. Partial hydrolysis of TEOS occurred during the precursor was east onto the substrate and both the partial hydrolyzed TEOS and complete hydrolyzed product SiO2 presented in the resulting membrane. Silicon and oxygen distributed uniformly in the resulting membrane.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2009年第7期1464-1468,共5页
Chemical Journal of Chinese Universities
