氧化石墨烯/碱式硫酸铝掺杂聚醚砜/聚酰胺复合纳滤膜的制备及其性能

doi:10.11949/j.issn.0438-1157.20180242

摘要/Abstract

摘要：

先由氧化石墨烯（GO）、硫酸铝和尿素通过水热法制得氧化石墨烯/碱式硫酸铝（GO-BAS）复合物，继与哌嗪（PIP）溶液共混作为水相；均苯三甲酰氯（TMC）溶于正己烷作为有机相；采用界面聚合法使两相单体在聚醚砜（PES）基膜表面形成聚酰胺（PA）功能层，制得氧化石墨烯/碱式硫酸铝复合物掺杂的聚醚砜/聚酰胺（PES-PA-GO-BAS）复合纳滤平板膜，并在较低的工作压力（0.3 MPa）下对其进行性能研究。其对无机盐溶液的截留率依次为：Na₂SO₄（91.08%） > MgSO₄（83.42%） > MgCl₂（68.97%） > NaCl（17.62%）；纯水通量可达24.19 L·m^-2·h^-1，较之聚酰胺纳滤膜提高了近60%，且具备良好的稳定性和耐碱性。

关键词: 氧化石墨烯, 纳滤, 膜, 纳米粒子, 碱式硫酸铝

Abstract:

Graphene oxide/basic aluminum sulfate (GO-BAS) composites were prepared via hydrothermal method using graphene oxide (GO), aluminum sulfate and urea as raw materials. The composites were blended with piperazine (PIP) solution as the water phase, trimesoyl chloride (TMC) was desolved in the hexane solution as the organic phase. The GO-BAS doped polyethersulfone/polyamide (PES-PA-GO-BAS) composite nanofiltration membrane was synthesized by interfacial polymerization method which forms a polyamide functional layer on the polyethersulfone (PES) ultrafiltration substrate membrane. It's performance was studied at a lower working pressure(0.3 MPa). The inorganic salt solutions rejection of the composite membrane as follows:Na₂SO₄(91.08%) > MgSO₄(83.42%) > MgCl₂(68.97%) > NaCl(17.62%), and the pure water flux up to 24.19 L·m^-2·h^-1, which is improving nearly 60% than the polyamide membrane. The nanofiltration membrane has a good alkali resistance and operation stability.

Key words: graphene oxide, nanofiltration, membrane, nanoparticles, basic aluminum sulfate

中图分类号:

TQ028.8

许中煌, 雷萍萍, 洪昱斌, 丁马太, 何旭敏, 蓝伟光. 氧化石墨烯/碱式硫酸铝掺杂聚醚砜/聚酰胺复合纳滤膜的制备及其性能[J]. 化工学报, 2018, 69(9): 4066-4074.

XU Zhonghuang, LEI Pingping, HONG Yubin, DING Matai, HE Xumin, LAN Weiguang. Preparation and performance of graphene oxide/basic aluminum sulfate doped polyethersulfone/polyamide composite nanofiltration membrane[J]. CIESC Journal, 2018, 69(9): 4066-4074.

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