Abstract An anti-fouling, free-standing membrane was synthesized through the polymerization of acrylamide in the presence of sodium alginate using N,N′-methylene-bisacrylamide as the covalent crosslinker and CaCl 2 as the ionic crosslinker. The membranes were characterized via field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FT-IR), and Thermal Gravity (TG). Bovine serum albumin (BSA) solution and yeast suspension were used to investigate the anti-fouling performance of the hydrogel filtration membrane. The calcium alginate/polyacrylamide (CA/PAM) filtration membrane exhibited 89.06% and 85.84% water flux recovery for yeast suspension and BSA solution, respectively, without washing the filtration membrane. The hydrogel filtration membrane showed limited adsorption and adhesion for BSA and yeast, and the rejection of BSA and yeast reached 98.53% and 99.64%, respectively. The results of dye rejection studies demonstrated potential applications of this material as a nanofiltration membrane. The free-standing CA/PAM hydrogel filtration membrane exhibits excellent anti-fouling properties and has promising application prospects in the fields of protein separation, microorganism filtration and removal of dyes.

中文翻译：

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一种具有高防污性能的独立式海藻酸钙/聚丙烯酰胺水凝胶纳滤膜的制备和表征

摘要 以N,N'-亚甲基-双丙烯酰胺为共价交联剂，CaCl 2 为离子交联剂，在海藻酸钠存在下聚合丙烯酰胺，合成了一种防污自立式膜。通过场发射扫描电子显微镜 (FESEM)、傅里叶变换红外光谱 (FT-IR) 和热重力 (TG) 对膜进行表征。牛血清白蛋白（BSA）溶液和酵母悬浮液用于研究水凝胶过滤膜的防污性能。藻酸钙/聚丙烯酰胺 (CA/PAM) 过滤膜对酵母悬浮液和 BSA 溶液的水通量回收率分别为 89.06% 和 85.84%，无需清洗过滤膜。水凝胶过滤膜对 BSA 和酵母表现出有限的吸附和粘附，BSA和酵母的排斥率分别达到98.53%和99.64%。染料排斥研究的结果证明了这种材料作为纳滤膜的潜在应用。独立式CA/PAM水凝胶过滤膜具有优异的防污性能，在蛋白质分离、微生物过滤和染料去除等领域具有广阔的应用前景。