摘要
由溶胶-凝胶法与水热法相结合,成功制备了氧化铝超滤膜。利用SEM、XRD等表征手段,研究膜层晶型、粒子形貌、孔径大小及其分布、膜层厚度等的合理调控,并表征其通量、截留率和耐酸碱性能。结果表明,水热处理溶胶并于合适温度下烧结,可有效调控超滤膜膜层的晶型和粒子的形貌;通过分散剂PEG合适型号的选择,可有效调控膜孔孔径及其分布;合适的涂膜液浓度并适量的成膜助剂PVA,可有效调控膜层厚度并避免其开裂;当氧化铝呈α态时,超滤膜具有优秀的耐酸碱性能。
Alumina ultrafiltration membrane was prepared by sol-gel hydrothermal method. SEM and XRD were employed to characterize the crystal form, particle brane layer surface so as to achieve a good control morphology, pore size distribution and thickness of mem of the membrane layer characteristic. In addition, the flux, rejection, acid and alkaline resistances of the membrane were also tested. The results showed that crystal form and particles surface morphology of ultrafiltration membrane could be efficiently controlled by treatment with hydrothermal method followed by sintering at suitable temperature. Pore size and pore size distribution could be well tuned by using different types PEG as dispersant agents. The thickness and cracking of membrane layer could be efficiently controlled by changing the concentration of the coating solution and by adding suitable amount of PVA. It was found that a-Al2O3 ultrafihration membrane displayed a better acid and alkaline resist- ance than that of transition-state.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2013年第20期3030-3034,共5页
Journal of Functional Materials
关键词
氧化铝
超滤膜
水热
溶胶-凝胶
alumina
ultrafiltration membrane
hydrothermal
sol-gel
