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Surface modification of piperazine-based nanofiltration membranes with serinol for enhanced antifouling properties in polymer flooding produced water treatment

机译:用丝氨醇对哌嗪基纳滤膜进行表面改性,以增强聚合物驱采出水处理中的防污性能

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In order to deal with the membrane fouling problem when treating the polymer flooding produced water (PFPW) with a typical thin film composite (TFC) nanofiltration (NF) membrane, a facile and effective serinol surface modification method has been introduced in this study, which is based on the membrane fouling mechanism proposed in our previous research. Serinol molecules were grafted on the nascent piperazine-based PA-TFC membrane through the acylation reaction between the serinol molecule’s amino group and the nascent membrane’s residual acyl chloride group. A series of characterizations indicated that this modification process could enhance membrane hydrophilicity and decrease the surface carboxyl density without changing the membrane’s morphology. Compared with the unmodified PA-TFC membrane, the serinol-grafted PA-TFC membrane had higher water permeability, stronger antifouling ability and equivalent solute rejection, which would be rather meaningful for improving membrane performance when treating PFPW.
机译:为了解决用典型的薄膜复合(TFC)纳滤(NF)膜处理聚合物驱采水(PFPW)时的膜污染问题,本研究引入了一种简便有效的丝氨醇表面改性方法,该方法基于我们先前研究中提出的膜污染机制。通过将丝氨醇分子的氨基与新生膜的残留酰氯基团之间的酰化反应,将丝氨醇分子接枝到新生的基于哌嗪的PA-TFC膜上。一系列特征表明,这种修饰过程可以增强膜的亲水性并降低表面羧基密度,而不会改变膜的形态。与未改性的PA-TFC膜相比,丝氨醇接枝的PA-TFC膜具有更高的水渗透性,更强的防污能力和等效的溶质排斥性,这对于改善PFPW的膜性能具有十分重要的意义。

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