摘要
To improve oxygen-enriching properties of cellulose derivative membranes, trimethylsilyl methylcellulose (TMS-MC) with degree of substitution (DS) of 1.12 was synthesized by using methylcellulose with DS of 1.80 as raw material and hexamethyldisilazane as reactant in a homogeneous reactive system.The chemical structures of TMS-MC were characterized with FT-IR and 1H NMR.The product samples were fairly soluble in ordinary organic solvents such as tetrahydrofuran, chloroform, xylene, toluene, and so on.The gas separation membranes were prepared by casting a xylene solution of TMS-MC on a sheet of PET.It was found that the oxygen permeation properties of the TMS-MC membrane were improved and an obvious increase in separation factor was obtained especially.Comparing with methylcellulose, for example, the permeability coefficient and separation factor of the TMS-MC membrane increased from 2.5 Barrer and 2.41 to 23.85 Barrer and 5.42 at 20℃, respectively.
To improve oxygen enriching properties of cellulose derivative membranes, trimethylsilyl methylcellulose （TMS-MC） with degree of substitution （DS） of 1.12 was synthesized by using methylcellulose with DS of 1.80 as raw material and hexamethyldisilazane as reactant in a homogeneous reactive system. The chemical structures of TMS-MC were characterized with FT IR and ^1H NMR. The product samples were fairly soluble in ordinary organic solvents such as tetrahydrofuran, chloroform, xylene, toluene, and so on. The gas separation membranes were prepared by casting a xylene solution of TMS MC on a sheet of PET. It was found that the oxygen permeation properties of the TMSMC membrane were improved and an obvious increase in separation factor was obtained especially. Comparing with methylcellulose, for example, the permeability coefficient and separation factor of the TMS MC membrane increased from 2.5 Barrer and 2.41 to 23.85 Barrer and 5.42 at 20℃, respectively.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2006年第5期1251-1254,共4页
CIESC Journal
基金
广东省自然科学基金项目(04010430).~~
关键词
三甲基硅基甲基纤维素
气体分离膜
富氧性能
六甲基二硅胺烷
trimethylsilyl methylcellulose
gas separation membrane
oxygen-enriching properties
hexamethyldisilazane
