摘要
采用聚酯(PET)为支撑层,以疏水性气相法纳米SiO2填充改性的聚二甲基硅氧烷(PDMS)为皮层制备硅橡胶复合膜,用SEM、WSM-5KN、TGA对膜改性后的物理形貌、拉伸强度及热稳定性进行分析与表征,并以乙醇/水物系为研究对象,着重考察了料液温度和浓度对改性复合膜渗透分离性能的影响.结果表明,改性膜的热稳定性显著提高,拉伸强度从空白膜的1.5 MPa增加到7.4 MPa.随着疏水气相法纳米SiO2含量的增加填充膜的分离因子极值不断增加并提前.
The PDMS/PET composite membranes were prepared by casting the polydimethylsiloxane （PDMS） membrane filled with fumed hydrophobic nano-silica on PET membrane. The physical morpholo- gy, tensile strength and thermal resistant performance of the as-prepared composite membranes were in- vestigated by SEM, WSM-5KN and TGA. The effects of feed temperature, feed concentration on the per- vaporation performance of ethanol/water solutions were also examined. It is shown from the results that the thermal resistant performance of the modified membrane is significantly improved and its tensile- strength is increased from 1.5 MPa to 7. 4 MPa compared with pure PDMS. Otherwise the peak value of the membrane separation factor seemed to constantly appear in advance.
出处
《膜科学与技术》
CAS
CSCD
北大核心
2011年第6期41-45,共5页
Membrane Science and Technology
基金
吉林省教育厅自然科学基金([2008]105)
