针对纯海藻酸钙水凝胶膜力学性能差、电解质溶液中易溶胀的问题，以羧化二氧化钛（TiO₂-COOH）为增强剂、海藻酸钠为成膜基材、钙离子为交联剂制备无机/有机杂化水凝胶过滤膜。通过红外光谱和扫描电镜表征羧化二氧化钛的化学结构和形貌，研究杂化膜的孔径分布、力学性能、溶胀性能以及染料截留性能。结果表明，羧化二氧化钛均匀分散在膜表面，添加羧化二氧化钛后，膜的力学性能和抗溶胀性显著提高，在0.1 MPa压力下对直接黑38和维多利亚蓝b的截留率分别达96.6%和95.3%，通量在13.9 L/（m²·h）以上。

For solving the problems that pure calcium alginate hydrogel membrane has a poor mechanical property and is easy to swell in an electrolyte solution,an inorganic/organic hybrid hydrogel filtration membrane is prepared by using carboxylated titanium dioxide (TiO₂-COOH) as a reinforcing agent,sodium alginate as membrane substrate and Ca²⁺ ion as cross-linking agent.Chemical structure and morphology of carboxylated titanium dioxide are characterized by Fourier transform infrared spectroscopy and scanning electron microscopy.The pore size distribution,mechanical property,swelling property,and dye rejection performance of the hybrid membrane are studied and evaluated.It is shown that carboxylated titanium dioxide is uniformly dispersed on the membrane surface.After carboxylated titanium dioxide is added,mechanical property and anti-swelling property of the membrane are improved significantly.Under 0.1 MPa of operation pressure,the retention ratios of Direct black 38 and Victoria blue by the hybrid membrane can reach 96.6% and 95.3%,respectively,with a permeate flux above 13.9 L/(m²·h).

王力鑫(1992-),男,硕士研究生,研究方向为膜法水处理,924261569@qq.com