膜科学与技术

PPBES基膜厚度对复合膜水蒸气渗透性能的影响

作者：王丹慧，张守海，潘雨曦，王昭琪，刘泽元，徐树刚，蹇锡高

单位：大连理工大学化工学院，辽宁省高性能树脂工程技术研究中心，辽宁省高分子科学与工程重点实验室，大连 116024

关键词：磺化杂萘联苯聚醚酮；基膜；厚度；复合膜；水蒸气

出版年,卷(期):页码： 2023,43(1):37-44

摘要：

使用非溶剂致相分离（NIPS）法制备不同厚度的杂萘联苯共聚醚砜（PPBES）超滤基膜。随着基膜厚度从53 μm升高到260 μm，基膜接触角、平均孔径、孔隙率和截留率增大，水通量降低。随后，以磺化含侧苯基杂萘联苯聚醚酮（SPPEK-P）为选择层，采用涂覆法制备SPPEK-P/PPBES复合膜。研究基膜厚度对复合膜水蒸气渗透选择性的影响，并对复合膜进行扫描电子显微镜和红外光谱表征。结果表明，随着基膜厚度增大，复合膜水蒸气渗透速率从2244 GPU降低到1033 GPU，水蒸气/氮气的选择性从445降低到288。

Copoly(phthalazinone biphenyl ether sulfone) (PPBES) ultrafiltration support membranes with different thickness were prepared through non-solvent induced phase separation (NIPS) method. When the thickness increased from 53 μm to 260 μm, the contact angle, mean pore diameter, porosity and rejection of membranes increased, while the water flux decreased. Then the thin film composite (TFC) membranes with sulfonated poly(phthalazinone ether ketone) containing pendant phenyl moieties (SPPEK-P) as the selective layer and PPBES as the support membrane were prepared by casting method. The TFC membranes with different thickness were characterized by SEM and FT-IR. The effect of PPBES support membrane thickness on water vapor permeance and water/N2 selectivity of TFC membranes were investigated. The results showed that when the thickness of membranes increased from 53 μm to 260 μm, water vapor permeance decreased from 2244 GPU to 1033 GPU, and water/N2 selectivity decreased from 445 to 288.

王丹慧（1990-），女，辽宁省锦州市人，博士，从事磺化聚芳醚除湿复合膜的研究。

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