摘要
通过湿法化学刻蚀得到单层MXene纳米片后,采用旋涂法将MXene纳米片负载至基膜上作为中间层制备聚酰胺复合纳滤膜,并探讨了MXene不同负载浓度对复合纳滤膜通量及盐截留性能的影响。结果表明引入MXene作为中间层,使得圆泡状形貌在所得膜表面形成,当旋涂1 mL浓度为0.1 g/L MXene时,通量为24.2 L/(m^(2)·h),硫酸钠截留率为97.4%,相比传统膜(通量12.9 L/(m^(2)·h),硫酸钠截留率96.3%)性能提升明显。随着MXene旋涂负载浓度增加,通量逐渐减小,而硫酸钠截留率则存在先增加后减小再稳定的趋势,截留率最高可达98.8%(通量16.3 L/(m^(2)·h))。
In this experiment,spin-coating was used to load the MXene nanosheet on the base film as an intermediate layer to prepare a polyamide composite nanofiltration membrane after obtaining a single-layer MXene nanosheet by wet chemical etching.The influence of MXene loading on membrane flux and salt retention performance was investigated.The results show that the bulbous protrusion generated on the nanofiltration membrane surface with the introduction of MXene as interlayer.when 1 mL MXene of 0.1 g/L was loaded via spin coating,and the water permeance was 24.2 L/(m^(2)·h)with the rejection rate of sodium sulfate of 97.4%,which surpassed the performance of the conventional membranes(12.9 L/(m^(2)·h),96.3%).And as the loading concentration of MXene increased,the flux gradually decreased.However,the rejection rate of sodium sulfate has a tendency to increase first,then decrease and stabilize,with a maximum rejection rate of 98.8%(water permeance 16.3 L/(m^(2)·h)).
作者
徐舜开
周准
柳斌
XU Shunkai;ZHOU Zhun;LIU Bin(College of Civil Engineering,Hunan University,Changsha 410082,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2023年第1期37-40,45,共5页
Technology of Water Treatment
基金
国家重点研发项目(2019YFD1100103)。
关键词
MXene
中间层
旋涂
复合纳滤膜
MXene
interlayer
spin-coating
composite nanofiltration membranes
