近年来,正渗透(FO)膜分离技术得到各研究领域的关注,而汲取剂的选取是研究关键点,以N-异丙基丙烯酰胺(NIPAM)和丙烯酸钠(SA)为水凝胶聚合单体,利用引发剂过硫酸铵(APS)和交联剂N,N-亚甲基双(丙烯酰胺)(MBA)对单体进行物理交联,通过改变各组分浓度制备出不同的聚N-异丙基丙烯酰胺-丙烯酸钠水凝胶(NIPAM/SA),并分析讨论其表面形貌和溶胀性能。结果表明:水凝胶制备剂最佳配比为46.5% NIPAM+46.5% SA+3% MBA+2% APS。将最佳配比的水凝胶汲取剂与3种高渗透压的无机盐汲取剂和水凝胶汲取剂进行正渗透测试,结果表明水凝胶汲取剂的返盐量为零,水凝胶汲取剂完全可以克服液态汲取剂带来的粒子返渗的困扰,在正渗透领域有正面作用。
In recent years,penetration (FO) get all the attention in the research field of the membrane separation technology,and selection of absorbing agent is the key point.N-isopropyl acrylamide (NIPAM) and sodium acrylate (SA) monomer were used,and using initiator ammonium persulfate (APS) and crosslinking agent N,N-methylene double (acrylamide) (MBA) to physical crosslinking the monomers,NIPAM/SA hydrogel was prepared by changing the concentration of different components.And the swelling performance and surface morphology of the hydrogel were analyzed.It was concluded that optimum proportion of the agent for hydrogel preparation as the following:46.5% NIPAM+46.5wt.% SA+3wt.% MBA+2wt.% APS.The results of the positive osmosis test of the best ratio of hydrogel absorbent with three inorganic salt absorbent and hydrogel absorbent with high osmotic pressure shown that the return salt of hydrogel absorbent was zero,which can completely overcome the problem of particle regurgitation caused by liquid absorbent,and had a positive effect in the field of positive osmosis.
[1] 谢朋,张忠国,孙涛,等.正渗透过程中汲取质反向渗透研究进展[J].化工进展,2015,34(10):3540-3550.
[2] 肖芹芹,徐世昌,王越,等.正渗透膜污染影响因素的研究与分析[J].化工进展,2018,37(1):356-367.
[3] Jin J Y,Guan Y X,Yao S J.Effect of the SA content of a novel thermo-sensitive P(NIPAM-co-SA) copolymer on denatured lysozyme refolding in vitro[J].Journal of Applied Polymer Science,2011,121:2597-2605.
[4] Demirel G B,Caykara T,Demiray M,et al.Effect of pore-forming agent type on swelling properties of macroporous poly(N-[3-(dimethylaminopropyl)]-methacrylamide-co-acrylamide) hydrogels[J].Journal of Macromolecular Science Part A,2008,46:58-64.
[5] 董安.双网络水凝胶的制备与分子模拟[D].北京:北京化工大学,2015.
[6] Filipcsei G,Sumaru K,Takagi T,et al.Swelling degree and shape change of photo- and thermo-response of spirobenzopyran-functionalized porous pNIPAAm hydrogels[J].Journal of Molecular Liquids,2014,189:63-67.
[7] 马骉,董炎炎,陈世文.细菌纤维素/聚乙烯醇/聚丙烯酰胺复合水凝胶的性能表征[J].中国组织工程研究,2017,21(30):4867-4872.
[8] 张鹏,杨子腾,王文哲,等.水溶性聚轮烷交联剂的制备及其在水凝胶颗粒型调驱剂中的潜在应用[J].油田化学,2019,36(1):107-111.
[9] Jiang Fatang,Li Wanfen,Zhan Xiaohui,et al.Preparation and charcterization of Konjac superabsorbent polymer[J].Journal of Wuhan University of Technology (Materials Science),2006,21(4):87-91.
[10] 林海豹,刘遵峰.双重交联VSNPs-PAA纳米复合水凝胶的制备及其溶胀性能的研究[J].离子交换与吸附,2018,34(2):97-104.
[11] Bel'nikevich N G,Bobrova N V,Elokhovskii V Y,et al.Effect of initiator on the structure of hydrogels of cross-linked polyacrylic acid[J].Russian Journal of Applied Chemistry,2011,84:2106-2113.
[12] Jiang S,Sudol E D,El-Aasser M S.Kinetics of dispersion polymerization of methyl methacrylate and n-butyl acrylate:effect of initiator concentration[J].Macromolecules,2007,40:4910-4916.
[13] 田彩云,王纯利,赵晨曦,等.正渗透膜分离工艺中4种无机驱动液性能比较分析[J].新疆农业大学学报,2016,39(4):338-344.
