College of Engineering, Qufu Normal University, Rizhao 276826, Shandong, PR China.
College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, Shandong, PR China.
Int J Biol Macromol. 2016 Oct;91:143-50. doi: 10.1016/j.ijbiomac.2016.05.072. Epub 2016 May 19.
In this study, cellulose acetate (CA) was blended with polyethersulfone (PES) to endow the ultrafiltration membrane with the improved hydrophilicity and antifouling property by using N,N-dimethylacetamide (DMAc) as the solvent. The effects of blend composition and evaporation time on the mechanical strength and pure water flux were investigated. It was found that the optimal composition of the casting solution was: 18wt% (PES), 4wt% (Polyvinylpyrrolidone K30), 3wt% (CA) and 20s (Evaporation time). The characteristics of CA-PES blend membranes were investigated through the methods of contact angle goniometer, antifouling property, compatibility, thermo gravimetric analysis and SEM. The results showed that the hydrophilicity and antifouling property of CA-PES ultrafiltration membranes were enhanced in comparison with the pure PES membranes. The CA-PES membranes exhibited semi-compatibility and good thermal stability below 270°C. This study provided a potential industrial application prospect of CA-PES membranes prepared in DMAc.
在这项研究中，醋酸纤维素（CA）与聚醚砜（PES）共混，通过使用 N，N-二甲基乙酰胺（DMAc）作为溶剂，赋予超滤膜改善的亲水性和抗污染性。考察了共混组成和蒸发时间对力学强度和纯水通量的影响。结果发现，浇铸溶液的最佳组成是：18wt%（PES）、4wt%（聚乙烯吡咯烷酮 K30）、3wt%（CA）和 20s（蒸发时间）。通过接触角测角仪、抗污染性、相容性、热重分析和 SEM 等方法研究了 CA-PES 共混膜的特性。结果表明，与纯 PES 膜相比，CA-PES 超滤膜的亲水性和抗污染性得到了提高。CA-PES 膜表现出半相容性和在 270°C 以下的良好热稳定性。这项研究为在 DMAc 中制备 CA-PES 膜提供了潜在的工业应用前景。
