研制成功一种对 CO2 具有促进传递作用的新型膜材料——聚乙烯胺。将此膜材料覆盖在聚砜膜表面制成复合膜。考察了复合膜的多层结构 ,复合膜对 CO2 、CH4、N2 等的吸着性能 ,及复合膜对 CO2 和 CH4的分离透过性能。结果表明 ,该复合膜对...研制成功一种对 CO2 具有促进传递作用的新型膜材料——聚乙烯胺。将此膜材料覆盖在聚砜膜表面制成复合膜。考察了复合膜的多层结构 ,复合膜对 CO2 、CH4、N2 等的吸着性能 ,及复合膜对 CO2 和 CH4的分离透过性能。结果表明 ,该复合膜对 CO2 有很高的吸着量 ,而对其他测试气体仅有极微弱的吸着 ;对 CO2 /展开更多
A new polymeric membrane material-polyvinylamine (PVAm), which contains amino-groups facilitating the transport of CO 2 in the membrane, has been developed. A composite membrane used for CO 2 separation was made up by...A new polymeric membrane material-polyvinylamine (PVAm), which contains amino-groups facilitating the transport of CO 2 in the membrane, has been developed. A composite membrane used for CO 2 separation was made up by covering a PS basis membrane with the polyvinylamine. Sorption of CO 2 on the PVAm-PS composite membrane and the PS basis membrane was measured by using the volumetric method. The results show that the composite membrane has very high CO 2 sorption capacity, and this sorption capacity arises mainly from the PVAm layer. Temperature has much impact on the sorption, the sorption capacity drops sharply when temperature increases. The sorption mechanism is analyzed. It is deduced that there are physical and chemical interaction simultaneously between the composite membrane and CO 2. The membrane has no obvious sorption for CH 4, N 2 and H 2.展开更多
Polyvinyl amine coated Fe3O4@SiO2 composite microspheres with a core‐shell structure were prepared and employed as a magnetic catalyst for Knoevenagel condensation under mild conditions. The catalyst can be readily r...Polyvinyl amine coated Fe3O4@SiO2 composite microspheres with a core‐shell structure were prepared and employed as a magnetic catalyst for Knoevenagel condensation under mild conditions. The catalyst can be readily recovered using a magnet and reused several times without loss in activity or selectivity. The performance of the magnetic base catalyst was compared with that of polyvinyl amine functionalized mesoporous SBA‐15, which showed that the magnetic nanoparticles gave improved reaction rate and yield.展开更多
文摘研制成功一种对 CO2 具有促进传递作用的新型膜材料——聚乙烯胺。将此膜材料覆盖在聚砜膜表面制成复合膜。考察了复合膜的多层结构 ,复合膜对 CO2 、CH4、N2 等的吸着性能 ,及复合膜对 CO2 和 CH4的分离透过性能。结果表明 ,该复合膜对 CO2 有很高的吸着量 ,而对其他测试气体仅有极微弱的吸着 ;对 CO2 /
文摘A new polymeric membrane material-polyvinylamine (PVAm), which contains amino-groups facilitating the transport of CO 2 in the membrane, has been developed. A composite membrane used for CO 2 separation was made up by covering a PS basis membrane with the polyvinylamine. Sorption of CO 2 on the PVAm-PS composite membrane and the PS basis membrane was measured by using the volumetric method. The results show that the composite membrane has very high CO 2 sorption capacity, and this sorption capacity arises mainly from the PVAm layer. Temperature has much impact on the sorption, the sorption capacity drops sharply when temperature increases. The sorption mechanism is analyzed. It is deduced that there are physical and chemical interaction simultaneously between the composite membrane and CO 2. The membrane has no obvious sorption for CH 4, N 2 and H 2.
基金Isfahan Science and Technology Town (Isfahan University of Technology) for the support of this work
文摘Polyvinyl amine coated Fe3O4@SiO2 composite microspheres with a core‐shell structure were prepared and employed as a magnetic catalyst for Knoevenagel condensation under mild conditions. The catalyst can be readily recovered using a magnet and reused several times without loss in activity or selectivity. The performance of the magnetic base catalyst was compared with that of polyvinyl amine functionalized mesoporous SBA‐15, which showed that the magnetic nanoparticles gave improved reaction rate and yield.
