Rostovtseva Valeriia, Pulyalina Alexandra, Rudakova Daria, Vinogradova Ludmila, Polotskaya Galina
Institute of Chemistry, Saint Petersburg State University, Universitetskiy pr. 26, Saint Petersburg 198504, Russia.
Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. 31, Saint Petersburg 199004, Russia.
Membranes (Basel). 2020 Apr 29;10(5):86. doi: 10.3390/membranes10050086.
Hybrid membranes based on poly (2,6-dimethyl-1,4-phenylene oxide) modified with heteroarm stars (HAS) were developed to separate ethylene glycol/water mixtures by pervaporation. The HAS consist of a small branching center fullerene C 60 and twelve arms of different nature, six arms of nonpolar polystyrene and six arms of polar poly-tert-butyl methacrylate. The changes of structure and physical properties with HAS inclusion were systematically studied using SEM, X-ray diffraction analysis, TGA, and contact angle measurements. Mass transfer of ethylene glycol and water through membranes was studied by sorption and pervaporation tests. It was found that the growth of HAS content up to 5 wt% in the membrane leads to an increase in the total flux and a strong increase in the separation factor. To evaluate intrinsic properties of the penetrant ‒membrane system, permeability and selectivity were calculated. Overall, utilizing star-shaped macromolecules as a filler can be a promising way to improve the separation performance of diffusion membranes.
开发了基于用杂臂星型聚合物（HAS）改性的聚（2,6-二甲基-1,4-亚苯基氧化物）的混合膜，用于通过渗透蒸发分离乙二醇/水混合物。HAS由一个小的分支中心富勒烯C60和十二个不同性质的臂组成，六个非极性聚苯乙烯臂和六个极性聚甲基丙烯酸叔丁酯臂。使用扫描电子显微镜（SEM）、X射线衍射分析、热重分析（TGA）和接触角测量系统地研究了加入HAS后结构和物理性质的变化。通过吸附和渗透蒸发试验研究了乙二醇和水通过膜的传质。发现膜中HAS含量增加到5 wt%会导致总通量增加以及分离因子大幅增加。为了评估渗透物-膜系统的固有性质，计算了渗透率和选择性。总体而言，利用星形大分子作为填料可能是提高扩散膜分离性能的一种有前途的方法。
