Fan Wei, Zhu Shaoxiong, Nie Jingjing, Du Binyang
State Key Laboratory of Motor Vehicle Biofuel Technology, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China.
Department of Chemistry, Zhejiang University, Hangzhou 310027, China.
Materials (Basel). 2023 Jul 21;16(14):5149. doi: 10.3390/ma16145149.
Thermo-sensitive microgels known as PMO-MGs were synthesized via surfactant free emulsion polymerization, with poly(ethylene glycol) methacrylate (OEGMA) and 2-(2-methoxyethoxy) ethyl methacrylate (MEOMA) used as the monomers and N, N-methylene-bis-acrylamide used as the crosslinker. PMO-MGs are spherical in shape and have an average diameter of 323 ± 12 nm, as determined via transmission electron microscopy. PMO-MGs/poly (ether sulfone) (PES) composited ultrafiltration membranes were then successfully prepared via the non-solvent-induced phase separation (NIPS) method using a PMO-MG and PES mixed solution as the casting solution. The obtained membranes were systematically characterized via combined X-ray photoelectron spectroscopy, field-emission scanning electron microscopy, Fourier transform infrared spectroscopy and contact angle goniometer techniques. It was found that the presence of PMO-MGs significantly improved the surface hydrophilicity and antifouling performance of the obtained membranes and the PMO-MGs mainly located on the channel surface of the membranes. At 20 °C, the pure water flux increased from 217.6 L·m·h for pure PES membrane (M00) to 369.7 L·m·h for PMO-MGs/PES composited membrane (M20) fabricated using the casting solution with 20-weight by percentage microgels. The incorporation of PMO-MGs also gave the composited membranes a thermo-sensitive character. When the temperature increased from 20 to 45 °C, the pure water flux of M20 membrane was enhanced from 369.7 to 618.7 L·m·h.
通过无表面活性剂乳液聚合合成了称为PMO-MGs的热敏微凝胶，使用聚乙二醇甲基丙烯酸酯（OEGMA）和2-(2-甲氧基乙氧基)乙基甲基丙烯酸酯（MEOMA）作为单体，N,N-亚甲基双丙烯酰胺作为交联剂。通过透射电子显微镜测定，PMO-MGs呈球形，平均直径为323±12nm。然后，以PMO-MG和PES混合溶液为铸膜液，通过非溶剂诱导相分离（NIPS）法成功制备了PMO-MGs/聚醚砜（PES）复合超滤膜。通过结合X射线光电子能谱、场发射扫描电子显微镜、傅里叶变换红外光谱和接触角测量仪技术对所得膜进行了系统表征。结果发现，PMO-MGs的存在显著提高了所得膜的表面亲水性和抗污染性能，且PMO-MGs主要位于膜的通道表面。在20℃时，纯水通量从纯PES膜（M00）的217.6L·m⁻²·h⁻¹增加到使用含20重量百分比微凝胶的铸膜液制备的PMO-MGs/PES复合膜（M20）的369.7L·m⁻²·h⁻¹。PMO-MGs的加入还赋予了复合膜热敏特性。当温度从20℃升高到45℃时，M20膜的纯水通量从369.7L·m⁻²·h⁻¹提高到618.7L·m⁻²·h⁻¹。
