Fouling resistant amphiphilic poly(dimethylsiloxane)-linked-poly(ethylene glycol) network on ultrafiltration poly(vinylidene fluoride) membrane and effect of spatial chain arrangement on separation of oil-water emulsions
Fouling resistant amphiphilic poly(dimethylsiloxane)-linked-poly(ethylene glycol) network on ultrafiltration poly(vinylidene fluoride) membrane and effect of spatial chain arrangement on separation of oil-water emulsions
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DOI：
10.1016/j.memsci.2019.04.067
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发表时间：
2019-08-01
影响因子：
9.5
通讯作者：
Jewrajka, Suresh K.
中科院分区：
文献类型：
--
作者：
Bhalani, Dixit, V;Jewrajka, Suresh K.
在先前工作的继续(J.Membr.SCI。566,2018,415)关于构建具有分级表面形态的超亲水膜，本文报道了一种用于分离水包油乳状液和蛋白质的含有悬挂的两亲链的膜表面的简便制备方法。用端胺基聚(二甲基硅氧烷)(H_2N-PDMS-NH_2)和单端异氰酸酯(H_3CO-PEG-NCO)对聚甲基丙烯酸甲酯(PMMA)-聚氯甲基苯乙烯(PMC)反应共混膜进行了改性，得到了含有悬挂的PDMS-PEG链的改性膜。在优化的反应条件下构建的膜表面在分离水包油乳状液和牛血清白蛋白时表现出比相应的亲水或疏水膜更好的抗污染能力。该膜能分离水包油型乳状液，截油率高达99.5%，通量降低约20%，通量恢复率98%。膜具有良好的抗污染性能的基本机理是PDMS链段容易从表面释放污染剂，以及PDMS连接的聚乙二醇链被水合的聚乙二醇链段清洗。由于膜表面形成了部分交联网络，因此膜是稳定的。显然，由于聚乙二醇链的水响应性较低，含有两端系留的PDMS-PEG链的膜的抗污染性能比含有悬挂的PDMS-PEG链的膜低。
In continuation of previous work (J. Membr. Sci. 566, 2018, 415) on construction of superhydrophilic membrane with hierarchical surface morphology, herein a facile route for the fabrication of membrane surface containing dangling amphiphilic chains for the separation of oil-in-water emulsions and protein has been reported. A reactive blend membrane prepared with poly(vinyl fluoride), poly(vinyl pyrrolidone) (360 kDa) and a poly(methyl methacrylate)-co-poly(chloromethyl styrene) upon sequential treatment with amine terminated poly(di-methylsiloxane) (H2N-PDMS-NH2) and single-end isocyanate terminated poly(ethylene glycol) (H3CO-PEG-NCO) gave modified membrane containing dangling PDMS-linked-PEG chains. Membrane surface constructed under optimized reaction conditions showed superior fouling resistant ability during separation of oil-in-water emulsions and bovine serum albumin to that of corresponding hydrophilic or hydrophobic membranes. The membrane was able to separate oil-in-water emulsions with oil rejection as high as > 99.5%, flux reduction of about 20%, and flux recovery ratio of > 98%. The underlying mechanism of good antifouling property of the membrane is attributed to the easy release of fouling agents from the surface by PDMS segments and cleaning by hydrated PEG segments of dangling PDMS-linked-PEG chains. This membrane is stable owing to formation of partially crosslinked network on membrane surface. Evidently, membrane containing both-end tethered PDMS-linked-PEG chains showed comparatively lower antifouling property than that of membrane containing dangling PDMS-linked-PEG chains due to low water response by the PEG chains.