氧化石墨烯改性PMIA膜的制备及性能研究

Preparation and Properties of Graphene Oxide Modified PMIA Membrane

通过氧化石墨烯(GO)改性聚间苯二甲酰间苯二胺(PMIA)膜,制备出复合纳滤膜,测试了不同GO含量对膜的各种性能和结构的作用;分别通过扫描电镜、接触角、ζ电位仪测定膜的亲水性、表面性能、结构,并以牛血清蛋白测试其抗污染性。结果表明,PMIA/GO膜的内部会出现较大的指状孔结构,而未改性PMIA膜内无指状孔;PMIA/GO复合膜相比与未改性的PMIA膜其具有更高的电负性和亲水性。当操作压力为0.7 MPa、当加入的GO的质量分数为0.3%的时,膜具有145 L/(m2·h)的纯水通量,比纯PMIA膜的纯水通量提高约2.6倍。在PMIA/GO复合纳滤膜具有优异的抗污染能力。

Graphene oxide （GO） modified poly （m-phenylene isophthalamide） composite nanofiltration membrane （PMIA/GO） was prepared via the phase inversion method, and the effects of different GO contents on the structure and properties of the membranes were investigated. The hydrophilic, surface properties, structure and anti-fouling performance of prepared PMIA/GO membranes were analyzed by SEM, contact angle and ζ-potential. The results showed that, the more finger-like pores appeared in the interior of the PMIA/GO membrane, but no finger-like pores appeared in unmodified PMIA/GO membrane. The higher negative charged and hydrophilic PMIA/GO composite membrane was successfully prepared by GO modification. And the water flux of the PMIA/GO （mass fraction of GO is 0.3%） membrane improved from 48.3 L/（m2.h） to 145 L/（m2,h） under the operating pressure of 0.7 MPa, while the membrane had the excellent antifouling properties.