聚酰胺掺杂氧化石墨烯纳滤膜的制备及性能研究

Preparation and Properties of Polyamide Doped Graphene Oxide Nanofiltration Membrane

以含氧化石墨烯(GO)的间苯二胺(MPD)水溶液作为水相,均苯三甲酰氯(TMC)为油相,在聚醚砜(PES)超滤膜表面通过界面聚合反应制备GO-TFC纳滤膜。对纳滤膜进行性能表征,对制备纳滤膜性能的影响因素进行了探究,并对膜进行抗污染性实验。结果表明,纳滤膜的制备优化条件为:GO的质量分数0.1%,反应时间60 s,热处理温度70℃、时间10 min。在最佳条件下制得的纳滤膜对质量浓度1 g/L的MgSO_(4)溶液的渗透通量为7.9 L/(m^(2)·h),截留率为97.2%(0.4 MPa),对不同种类的盐的截留率顺序为MgSO_(4)>Na_(2)SO_(4)>NaCl>MgCl_(2)。牛血清蛋白和腐植酸抗污染的通量恢复率分别为93.5%和93.3%,表明所制备的纳滤膜具有很好的抗污染性。

Using graphene oxide(GO)-containing m-phenylenediamine(MPD)solution as the aqueous phase and trimesoyl chloride(TMC)as the oil phase,GO-TFC nanofiltration membranes were prepared on the surface of polyethersulfone(PES)ultrafiltration membrane by interfacial polymerization.The characterization of nanofiltration membranes,the influence factors on the nanofiltration performance,and the anti-fouling tests were investigated.The results showed that the best conditions for the preparation of nanofiltration membrane:the mass fraction of GO is 0.1%,reaction time is 60 s,heat treatment temperature is 70℃and heat treatment time is 10 min.The permeation flux of the prepared nanofiltration membrane is 7.9 L/(m^(2)·h)under the best conditions with 1 g/L MgSO_(4) solution,and the rejection rate is 97.2%(0.4 MPa).The order of rejection rate is MgSO_(4)>Na_(2)SO_(4)>NaCl>MgCl_(2).The BSA and HA fouling recovery of water flux for the prepared nanofiltration membrane were 93.5%and 93.3%respectively,indicating the nanofiltration membrane produced has good stain resistance.