摘要
PVA/PVP/Ag+膜在苯、环己烷混合物中的溶胀实验发现,膜优先吸附苯,且膜中Ag+含量越大,膜在苯中的溶胀率越大,在环己烷中溶胀率越小.渗透汽化测试结果也表明,PVA/PVP/Ag+膜对苯/环己烷的分离性能明显优于PVA/PVP膜.而且,随着膜中Ag+含量的增加,膜的渗透通量J增大;分离因子先增大后减小,当膜中w(聚合物)∶w(AgNO3)=1∶1时,分离因子α达到最大值,为47.5,通量为7.8g/(m2·h)(进料的质量分数为10%,20℃).而对膜进行交联改性后,分离因子可进一步提高,但通量下降.
The sorption of benzene and cyclohexane in solid polymer electrolytes based on blends of poly(vinyl alcohol)(PVA), poly(vinyl pyrrolidone) (PVP) and silver nitrate (AgNO3) is introduced. The solid polymer electrolytes exhibit preferential sorption for benzene due to complexation of benzene with Ag+ ion in the polymer matrix and reduce cyclohexane solubility in solid polymer electrolytes membrane. The pervaporation separation of benzene/cyclohexane mixture is performed with PVA/PVP/Ag+ membrane.The results show that the best separation factor is 47.5 and total flux is 7.8 g/(m2·h)(the mass fraction of bensene is 10%,20℃)at the m(AgNO3)∶m(PVA/PVP)=1∶1.It is also found that the membrane crosslinking with maleic acid enhanced separation factor and reduced total flux.
出处
《膜科学与技术》
CAS
CSCD
北大核心
2003年第5期52-55,共4页
Membrane Science and Technology
基金
国家自然科学基金重点项目(批准号29836160)
