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Preparation and water desalination properties of bridged polysilsesquioxane membranes with divinylbenzene and divinylpyridine units
Polymer Journal ( IF 2.8 ) Pub Date : 2020-07-27 , DOI: 10.1038/s41428-020-0386-x
Kazuki Yamamoto , Ibuki Saito , Yunosuke Amaike , Toshimi Nakaya , Joji Ohshita , Takahiro Gunji

Bridged polysilsesquioxanes are promising materials for reverse osmosis membranes because they exhibit robust properties. To investigate the effects of the polarity and rigidity of organic components of the polymer on the water permeability of the membrane, two alkoxysilane monomers, 2,5-bis[2-(triethoxysilyl)vinyl]pyridine (BTES-VP) and 1,4-bis[2-(triethoxysilyl)vinyl]benzene (BTES-VB), were synthesized to compare their hydrophilicity and water desalination properties. Water contact angle experiments on the film surfaces revealed that the BTES-VP-derived film was more hydrophilic than the BTES-VB-derived film. Density functional theory calculations of the monomer structures also suggested that BTES-VP is more polar and has a larger dipole moment than BTES-VB. Both membranes prepared from BTES-VP and BTES-VB rejected 95–97% of aqueous sodium chloride and displayed water permeances of 1.1 × 10 −13 and 8.5 × 10 −14 m 3 /(m 2 Pa s), respectively. Bridged polysilsesquioxanes are promising materials for reverse osmosis membranes because they exhibit robust properties. To investigate the effects of the polarity and rigidity of organic components of the polymer on the water permeability of the membrane, two alkoxysilane monomers, 2,5-bis[2-(triethoxysilyl)vinyl]pyridine (BTES-VP) and 1,4-bis[2-(triethoxysilyl)vinyl]benzene (BTES-VB), were synthesized. Both membranes prepared from BTES-VP and BTES-VB rejected 95–97% of aqueous sodium chloride and displayed water permeances of 1.1 × 10 −13 and 8.5 × 10 −14 m 3 /(m 2 · Pa· s), respectively.

中文翻译:

二乙烯基苯和二乙烯基吡啶单元桥接聚倍半硅氧烷膜的制备及脱盐性能

桥联聚倍半硅氧烷是反渗透膜的有前途的材料,因为它们表现出强大的性能。为了研究聚合物有机组分的极性和刚性对膜透水性的影响,两种烷氧基硅烷单体、2,5-双[2-(三乙氧基甲硅烷基)乙烯基]吡啶 (BTES-VP) 和 1,4 -双[2-(三乙氧基甲硅烷基)乙烯基]苯(BTES-VB),被合成以比较它们的亲水性和水淡化特性。薄膜表面的水接触角实验表明,BTES-VP 衍生的薄膜比 BTES-VB 衍生的薄膜更具亲水性。单体结构的密度泛函理论计算也表明 BTES-VP 比 BTES-VB 更具极性并且具有更大的偶极矩。由 BTES-VP 和 BTES-VB 制备的两种膜都排斥 95-97% 的氯化钠水溶液,并分别显示出 1.1 × 10 -13 和 8.5 × 10 -14 m 3 /(m 2 Pa s) 的水渗透率。桥联聚倍半硅氧烷是反渗透膜的有前途的材料,因为它们表现出强大的性能。为了研究聚合物有机组分的极性和刚性对膜透水性的影响,两种烷氧基硅烷单体、2,5-双[2-(三乙氧基甲硅烷基)乙烯基]吡啶 (BTES-VP) 和 1,4合成了-双[2-(三乙氧基甲硅烷基)乙烯基]苯(BTES-VB)。由BTES-VP 和BTES-VB 制备的两种膜都排斥95-97% 的氯化钠水溶液,并分别显示出1.1 × 10 -13 和8.5 × 10 -14 m 3 /(m 2 · Pa·s) 的水渗透率。分别为5×10 -14 m 3 /(m 2 Pa·s)。桥联聚倍半硅氧烷是反渗透膜的有前途的材料,因为它们表现出强大的性能。为了研究聚合物有机组分的极性和刚性对膜透水性的影响,两种烷氧基硅烷单体、2,5-双[2-(三乙氧基甲硅烷基)乙烯基]吡啶 (BTES-VP) 和 1,4合成了-双[2-(三乙氧基甲硅烷基)乙烯基]苯(BTES-VB)。由BTES-VP 和BTES-VB 制备的两种膜都排斥95-97% 的氯化钠水溶液,并分别显示出1.1 × 10 -13 和8.5 × 10 -14 m 3 /(m 2 · Pa·s) 的水渗透率。分别为5×10 -14 m 3 /(m 2 Pa·s)。桥联聚倍半硅氧烷是反渗透膜的有前途的材料,因为它们表现出强大的性能。为了研究聚合物有机组分的极性和刚性对膜透水性的影响,两种烷氧基硅烷单体、2,5-双[2-(三乙氧基甲硅烷基)乙烯基]吡啶 (BTES-VP) 和 1,4合成了-双[2-(三乙氧基甲硅烷基)乙烯基]苯(BTES-VB)。由BTES-VP 和BTES-VB 制备的两种膜都排斥95-97% 的氯化钠水溶液,并分别显示出1.1 × 10 -13 和8.5 × 10 -14 m 3 /(m 2 · Pa·s) 的水渗透率。为了研究聚合物有机组分的极性和刚性对膜透水性的影响,两种烷氧基硅烷单体、2,5-双[2-(三乙氧基甲硅烷基)乙烯基]吡啶 (BTES-VP) 和 1,4合成了-双[2-(三乙氧基甲硅烷基)乙烯基]苯(BTES-VB)。由BTES-VP 和BTES-VB 制备的两种膜都排斥95-97% 的氯化钠水溶液,并分别显示出1.1 × 10 -13 和8.5 × 10 -14 m 3 /(m 2 · Pa·s) 的水渗透率。为了研究聚合物有机组分的极性和刚性对膜透水性的影响,两种烷氧基硅烷单体、2,5-双[2-(三乙氧基甲硅烷基)乙烯基]吡啶 (BTES-VP) 和 1,4合成了-双[2-(三乙氧基甲硅烷基)乙烯基]苯(BTES-VB)。由BTES-VP 和BTES-VB 制备的两种膜都排斥95-97% 的氯化钠水溶液,并分别显示出1.1 × 10 -13 和8.5 × 10 -14 m 3 /(m 2 · Pa·s) 的水渗透率。
更新日期:2020-07-27
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