三甲基硅基甲基纤维素/钴络合物复合膜的制备与富氧性能  

Preparation and oxygen-enriciing properties of trimethylsilyl methylcellulose/Cobalt schiff base composite 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：《暨南大学学报（自然科学与医学版）》2006年第5期699-704,709,共7页Journal of Jinan University(Natural Science & Medicine Edition)

基　　金：广州市科委基金(2004J1-C0131)资助

摘　　要：使用甲基纤维素和六甲基二硅胺烷(HMDS)合成了三甲基硅基甲基纤维素醚(TMS-MC).通过溶液浇铸制备了TMS-MC膜和TMS-MC与一种钴Sch iff碱络合物,N,N′-二水杨乙二亚氨基钴的复合膜.对复合膜的力学性能、富氧性能以及影响富氧性能的因素如压差、温度以及络合物的用量进行了研究.与TMS-MC膜相比,复合膜由于钴络合物的加入具有对氧的促进输送作用,因此获得在低压差条件下透氧系数和氧氮分离系数同时提高的效果,尤其是后者较为显著.在20℃和0.05 MPa压差条件下,透氧系数为57.86 Barrer,氧氮分离系数达到11.08.Trimethylsilyl methylcellulose （TMS -MC） was synthesized by using methylcellulose and hexamethyldisilane in a homogeneous system. A solvent - casting process was used to prepare the composite membranes containing TMS -MC and N, N＇ -disalicylidene- ethylenediamine cobalt. Mechanical performances and oxygen -enriching properties of the composite membranes and some effect factors （pressure difference, temperature） of the permeability for O2 and N2 were investigated in detail, it was found that a facilitated oxygen transport was introduced into the composite membranes due to the addition of the cobalt complex. Not only permeability coefficients for O2 were obviously increased, but also the good selectivity factors for O2 and N2 were simultaneously obtained under low pressure difference, especially for the latter. Under pressure difference of 0.05 MPa and 20 ℃, the permeability coefficient and the selectivity factor are 57.86 Barfer and 11.08,respectively.

关 键 词：气体分离膜 三甲基硅基甲基纤维素 富氧性能 N N’-二水杨乙二亚氨基钴 

分 类 号：Q631[生物学—生物物理学] TQ028.8[化学工程]