三甲基硅基甲基纤维素的合成及膜的富氧性能  

Synthesis of trimethylsilyl methylcellulose and oxygen-enriching properties of membranes

作　　者：张子勇[1] 吴新华[1] 

机构地区：[1]暨南大学材料科学与工程系,广东广州510632

出　　处：《化工学报》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).~~

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.

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 

分 类 号：O636[理学—高分子化学] TQ26[理学—化学]