Margarito Marianito Tiangson, Beltran Arnel Bas, Huelgas-Orbecido Aileen
Department of Chemical Engineering, De La Salle University, 2401 Taft Avenue, Manila 1004, Philippines.
Materials Science Division, Industrial Technology Development Institute, Department of Science and Technology (DOST), Taguig 1631, Philippines.
Polymers (Basel). 2021 May 26;13(11):1743. doi: 10.3390/polym13111743.
This study aims to integrate copper (Cu) during membrane formation by a facile simultaneous phase separation process to alleviate biofouling and improve membrane performance. Polythiourea (PTU) polymer synthesized through condensation polymerization of 4,4-oxydianiline and p-phenylene diisothiocyanate in dimethyl sulfoxide was used in the preparation of dope solution. By incorporating different concentrations of cupric acetate in the non-solvent bath, both non-solvent induced phase separation and complexation induced phase separation occur instantaneously. Scanning electron microscopy-energy dispersive X-ray, fourier-transform infrared spectroscopy and time-of-flight secondary ion mass spectroscopy analysis accompanied by color change of the membrane surfaces-confirms the interaction of the polymer with Cu. Interaction of Cu at the interface during membrane formation results in a decrease in contact angle from 2 to 10° and a decrease in surface roughness from 30% to 52% as measured by atomic force microscope analysis. Pure water flux of PTU-Cu membrane increased by a factor of 3 to 17 relative to pristine PTU membrane. Both the pristine PTU and PTU-Cu membrane showed antibacterial characteristics against .
本研究旨在通过简便的同时相分离过程在膜形成过程中引入铜（Cu），以减轻生物污染并改善膜性能。通过4,4'-二氨基二苯醚和对苯撑二异硫氰酸酯在二甲基亚砜中缩聚合成的聚硫脲（PTU）聚合物用于制备铸膜液。通过在非溶剂浴中加入不同浓度的醋酸铜，非溶剂诱导相分离和络合诱导相分离同时瞬间发生。扫描电子显微镜-能量色散X射线、傅里叶变换红外光谱和飞行时间二次离子质谱分析以及膜表面颜色变化证实了聚合物与铜的相互作用。通过原子力显微镜分析测量，膜形成过程中铜在界面处的相互作用导致接触角从2°降至10°，表面粗糙度从30%降至52%。相对于原始PTU膜，PTU-Cu膜的纯水通量增加了3至17倍。原始PTU膜和PTU-Cu膜均对……表现出抗菌特性。
