- 學位論文
二甲基亞碸取代有毒溶劑以非溶劑誘導相轉換法製作聚醚碸超過濾薄膜
Non-toxic solvent dimethyl sulfoxide for preparing poly(ether sulfone) ultrafiltration membranes by nonsolvent induce phase separation method
摘要
在這項研究中，我們使用非溶劑誘導相分離法以聚乙烯吡咯烷酮(polyethersulfone)/二甲亞砜(dimethyl sulfoxide)/聚醚砜(polyethersulfone)製作超過濾薄膜。研究了不同溫度條件（25°C ~ 50°C）和PVP的含量（0 ~ 14 wt%）對薄膜結構的影響。當製膜溫度升高時，製膜液的黏度降低;因此薄膜厚度、表面接觸角和拉伸強度也降低，但孔徑、純水通量 (PWP)和截留分子量 (MWCO)增加。當製膜溫度為 40°C時，製作的薄膜的孔徑和孔隙度分別為 29 nm和78 %。該薄膜的拉伸強度為6 N/mm2，而PWP、MWCO和BSA截留率分別為472 LMH、222 kDa和97%。.當製膜液添加PVP後，製膜液的黏度增加。薄膜結構變得更加緊密。製膜液的黏度增加。製作的薄膜厚度、孔徑、下表面接觸角、MWCO和拉伸強度也增加，但PWP降低。
並列摘要
In this study, nonsolvent induce phase separation method was adopted to prepare poly(ethersulfone) ultrafiltration membranes from the dopes of poly(ethersulfone) /poly(vinylpyrrolidone)/dimethyl sulfoxide. The effects of procedure temperatures (25~ 50°C) and PVP concentrations (0 ~ 14wt%) on the membrane structure were examined. When the procedure temperature increased, the viscosity of the dope decreased; thus, the thickness, surface contact angle, and tensile strength of membranes, decreased, but the pore size, pure water permeability (PWP) and molecular weight cutoff (MWCO) increased. When the procedure temperature was 40°C, the pore size and porosity of the prepared membrane were 29 nm and 78 %, respectively. The tensile strength of this membrane was 6 N/mm2, while PWP, MWCO, and BSA rejection were 472 LMH, 222 kDa, and 97 %, respectively. When PVP was added to the dope, the viscosity of the dope increased. The resulted membranes became more compact. The thickness, pore size, bottom surface contact angle, MWCO, and tensile strength of the membranes increased, but PWP decreased.