新型含钴硅橡胶离聚体膜的富氧性能  

Oxygen-enriching Properties of a New Silicone Rubber Ionomer Membranes Containing Cobalt

作　　者：张子勇[1] 刘宗华[1] 

机构地区：[1]暨南大学生命科学与技术学院化学系,广州510632

出　　处：《高等学校化学学报》2003年第3期562-564,共3页Chemical Journal of Chinese Universities

基　　金：中山大学聚合物复合材料及功能材料教育部重点实验室访问学者基金 (批准号 :2 0 0 0 -1-2 )资助

摘　　要：A new type of silicone rubber membranes with facilitated transport properties for oxygen was prepared by using 11-alkenoic acid cobalt, a silicone rubber containing vinyl groups of 5%（molar fraction）, a hydrogen-containing silicon oil and chlorine platinum acid. The solution casting and vulcanization were carried out simultaneously at room temperature. The studies on permselectivities show that O2 permeability coefficients increase with decreasing oxygen pressure difference, but N2 permeability coefficients are independent of nitrogen pressure difference. The cause is considered that a polymer cobalt complex is formed to possess an ability of facilitated transport for oxygen. This result leads to the increases in both oxygen permeability coefficient and oxygen/nitrogen separation coefficient at the same time. For example, oxygen permeability coefficient of 750 Barrer and oxygen nitrogen separation coefficient of 3.09 were obtained at a pressure difference of 0.05 MPa for the membrane containing 11-alkenoic acid cobalt of 2.5%（mass fraction）. As high as 5% of 11-alkenoic acid cobalt could be added into the membrane, its oxygen permeability coefficient and oxygen/nitrogen separation coefficient increase to 802 Barrer and 3.34 at the pressure difference of 0.05 MPa, respectively.A new type of silicone rubber membranes with facilitated transport properties for oxygen was prepared by using 11-alkenoic acid cobalt, a silicone rubber containing vinyl groups of 5%(molar fraction), a hydrogen-containing silicon oil and chlorine platinum acid. The solution casting and vulcanization were carried out simultaneously at room temperature. The studies on permselectivities show that O_2 permeability coefficients increase with decreasing oxygen pressure difference, but N_2 permeability coefficients are independent of nitrogen pressure difference. The cause is considered that a polymer cobalt complex is formed to possess an ability of facilitated transport for oxygen. This result leads to the increases in both oxygen permeability coefficient and oxygen/nitrogen separation coefficient at the same time. For example, oxygen permeability coefficient of 750 Barrer and oxygen nitrogen separation coefficient of 3.09 were obtained at a pressure difference of 0.05 MPa for the membrane containing 11-alkenoic acid cobalt of 2.5%(mass fraction). As high as 5% of 11-alkenoic acid cobalt could be added into the membrane, its oxygen permeability coefficient and oxygen/nitrogen separation coefficient increase to 802 Barrer and 3.34 at the pressure difference of 0.05 MPa, respectively.

关 键 词：钴 富氧性能 气体分离膜 硅橡胶 十一烯酸钴 氮气 氧气 分离 改性 

分 类 号：TQ028.8[化学工程]