低温等离子体液相接枝NVP改性PAN膜  

The graft modification of poly acrylonitrile(PAN) membranes in NVP aqueous solution by low-temperature plasma

作　　者：陈剑[1] 李继定[1] 王鼎[1] 赵之平[1] 陈翠仙[1] 

机构地区：[1]清华大学化学工程系膜技术工程研究中心,北京100084

出　　处：《膜科学与技术》2006年第3期7-11,共5页Membrane Science and Technology

基　　金：国家863项目(2003AA328020);国家973项目(2003CB615701);国家自然科学基金项目(20276034)

摘　　要：采用液相等离子体接枝技术改性聚丙烯腈(PAN)膜,在PAN膜表面引入亲水性单体氮乙烯吡咯烷酮(NVP).通过傅立叶红外光谱、DSC、XPS对PAN改性膜进行了表征,研究了单体浓度、温度、接枝时间对PAN改性膜纯水通量的影响,考察了在不同单体接枝温度下,PAN改性膜对NaCl、MgSO4混合盐体系的分离性能.In order to control surface performances of polyacrylonitrile （PAN） membrane, low temperature plasma- induced graft modifications was used to prepare hydrophilic membranes. By argon （Ar） treating and subsequent grafting reaction, a hydrophilic monomer, NVP, was introduced onto PAN membrane. The effectiveness of modification and the chemical changes at the modified surface was studied under different plasma operating variables and graft reaction conditions such as plasma power, treatment time, monomer temperature and reaction time. The structure and chemical composition at the PAN membrane surface were characterized by reflection F-FIR, X- ray photoelectron spectroscopy （XPS）, and DSC. It was revealed that NVP monomers were successfully grafted onto PAN membranes. The water permeabilities of the PAN membranes modified in different graft condition, such as reaction time, reaction temperature were measured. The flux and retention of the modified PAN membranes were determined with a mixed salt（0.03 mol/L MgSO4 ＋ 0.02 mol/L NaCl）/water system.

关 键 词：液相接枝 PAN膜 等离子体 NVP 

分 类 号：TB43[一般工业技术]