聚醚砜/改性UiO-66共混超滤膜的制备与性能  

Preparation and properties of polyether sulfone/modified UiO-66 blended ultrafiltration membrane

作　　者：刘源骞 陈英波[1] 许林哲 陶柯宇 陆旭 王潇哲 LIU Yuanqian;CHEN Yingbo;XU Linzhe;TAO Keyu;LU Xu;WANG Xiaozhe(School of Material Science and Engineering,Tiangong University,Tianjin 300387,China)

机构地区：[1]天津工业大学材料科学与工程学院,天津300387

出　　处：《精细化工》2024年第11期2413-2422,共10页Fine Chemicals

摘　　要：采用溶剂热法在金属有机框架(MOFs)粒子UiO-66上引入氨基和聚吡咯烷酮(PVP),制备了改性MOFs粒子PVP-UiO-66-NH_(2),将其与聚醚砜(PES)共混后,通过相转化法制备了超滤膜PVP-UiO-66-NH_(2)/PES。采用FTIR、XRD、SEM、TEM和真彩色共聚焦显微镜(CLSM)对PVP-UiO-66-NH_(2)和PVP-UiO-66-NH_(2)/PES进行了表征,考察了PVP-UiO-66-NH_(2)质量分数对PVP-UiO-66-NH_(2)/PES性能的影响。结果表明,PVP-UiO-66-NH_(2)具有纳米级的粒径(41 nm),形状圆润。由质量分数2.5%的PVP-UiO-66-NH_(2)制备的PVP-UiO-66-NH_(2)/PES膜(P-2.5)具有较好的综合性能,其内部的指状孔呈现良好的立体形态,孔道直立;其拉伸强度为3.06 MPa,断裂伸长率为14.3%;具有81.43%的孔隙率和75.2°的水接触角;在0.1 MPa的测试压力下,其纯水通量为506.9 L/(m^(2)·h);被牛血清蛋白(BSA)污染后经简单水冲洗,通量恢复率达到95.97%;在600 min的过滤测试中,其水通量仍能维持在300 L/(m^(2)·h)左右。PVP-UiO-66-NH_(2)/PES较好的分离性能归因于PVP-UiO-66-NH_(2)在PES膜上良好的分散性和均匀孔道结构。Ultrafiltration membranes PVP-UiO-66-NH_(2)/PES were prepared via phase conversion method from blending polyether sulfone(PES)with modified metal-organic framework(MOFs)particles PVP-UiO-66-NH_(2),which were synthesized from introducing amino group and polyvinyl pyrrolidone(PVP)into MOFs particle UiO-66 by solvothermal method.Particles PVP-UiO-66-NH_(2) and membranes PVP-UiO-66-NH_(2)/PES were characterized by FTIR,XRD,SEM,TEM and true-color confocal laser scanning microscope(CLSM),and the influence of PVP-UiO-66-NH_(2) mass fraction on the properties of PVP-UiO-66-NH_(2)/PES were further analyzed.The results showed that PVP-UiO-66-NH_(2) displayed a nanoscale particle size of 41 nm and a round shape.The PVP-UiO-66-NH_(2)/PES membrane(P-2.5)prepared with 2.5%(mass fraction)PVP-UiO-66-NH_(2),which exhibited good comprehensive properties,with the internal upright finger-like pores showing good stereoscopic morphology,displayed tensile strength of 3.06 MPa,elongation at break of 14.3%,porosity of 81.43%and water contact angle of 75.2°.Under the test pressure of 0.1 MPa,the membrane showed pure water flux of 506.9 L/(m^(2)·h),and flux recovery rate of 95.97%after it was contaminated with bovine serum protein(BSA)and cleaned by simple water.In the filtration test of 600 min,the water flux could still be maintained at about 300 L/(m^(2)·h).The improved separation performance of PVP-UiO-66-NH_(2)/PES was attributed to good dispersion and uniform pore structure of PVP-UiO-66-NH_(2) on PES membrane.

关 键 词：超滤膜 聚醚砜 改性UiO-66 共混 抗污染性 功能材料 

分 类 号：TQ051.893[化学工程]