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Superabsorbent polymer (SAP) hydrogels for protein enrichment

机译：用于蛋白质富集的超吸收性聚合物（SAP）水凝胶

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Superabsorbent polymer (SAP) hydrogels are mainly acrylic based polymer hydrogels which are capable of absorbing water around 100 times of their own weight. Thus these are supposed to be the promising material which can be incorporated as a draw agent in forward osmosis (FO) process. In this paper, superabsorbent polymer hydrogels are used as a draw agent for protein enrichment in FO process so that structure of protein remains intact during dewatering process. Though the free swelling capacity of hydrogels in aqueous medium is high, due to their slow swelling rates water fluxes obtained in FO process are much lower as compared to conventional salts used as a draw solute. Thus in this paper research emphasis was given on increasing swelling rates of hydrogels to improve water fluxes by graft copolymerizing acrylic acid monomer on carboxymethyl cellulose (CMC) polymer. Moreover, for feasible recycling of these draw agents, a thermoresponsive polymer N-isopropyl acrylamide (NIPAM) was copolymerized with superabsorbing acrylic acid monomer and thermal dewatering process was used to regenerate the hydrogels.
机译：高吸收性聚合物（SAP）水凝胶主要是丙烯酸基聚合物水凝胶，能够吸收约100倍于自身重量的水。因此，这些被认为是有前途的材料，可以将其作为正向渗透（FO）过程中的牵引剂加入。在本文中，高吸收性聚合物水凝胶被用作FO过程中蛋白质富集的引力剂，从而在脱水过程中蛋白质的结构保持完整。尽管水凝胶在水性介质中的自由溶胀能力很高，但由于其缓慢的溶胀速率，与用作萃取溶质的常规盐相比，在FO工艺中获得的水通量要低得多。因此，在本文中，研究重点是通过将丙烯酸单体接枝到羧甲基纤维素（CMC）聚合物上来提高水凝胶的溶胀速率以改善水通量。此外，为了可行地回收这些拉伸剂，将热响应性聚合物N-异丙基丙烯酰胺（NIPAM）与超吸收性丙烯酸单体共聚，并使用热脱水工艺使水凝胶再生。

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