SA/GO/HBP-NH_(2)复合气凝胶制备及吸附性研究  

Preparation and Adsorption Properties of SA/GO/HBP-NH_(2) Composite Aerogels

作　　者：赵为陶[1] 蔺亚琴 张德锁[2] 陈宇岳[2] Zhao Weitao;Lin Yaqin;Zhang Desuo;Chen Yuyue(Changzhou Vocational Institute of Textile and Garment,Changzhou,Jiangsu 213164,China;College of Textile and Clothing Engineering,Soochow University,Suzhou,Jiangsu 215021,China)

机构地区：[1]常州纺织服装职业技术学院,江苏常州213164 [2]苏州大学纺织与服装工程学院,江苏苏州215021

出　　处：《针织工业》2021年第12期29-34,共6页Knitting Industries

基　　金：江苏省高职院校教师专业带头人高端研修项目资助(2020GRFX002);江苏高校“青蓝工程”优秀教学团队项目资助(苏教师函[2021]11号);常州纺织服装职业技术学院优秀青年骨干教师项目资助(常纺院人字[2019]11号)。

摘　　要：以海藻酸钠(SA)、氧化石墨烯(GO)、端氨基超支化聚合物(HBP-NH_(2))为基材,采用溶胶-凝胶法和冷冻干燥技术制备了SA/GO/HBP-NH_(2)复合气凝胶。对复合气凝胶的制备机理、形貌特征、力学性能以及金属离子吸附能力进行了分析与测试。研究结果表明:SA/GO/HBP-NH_(2)复合气凝胶3组分之间主要通过SA与GO间的氢键及GO与HBP-NH_(2)间的酰胺键作用而结合,GO-HBP-NH_(2)均匀地分散在气凝胶体系中。当复合气凝胶体系质量浓度为2.0%,3组分SA、GO、HBP-NH_(2)质量配比为2.00∶0.06∶0.08时,复合气凝胶的压缩强度可达593.91 kPa,密度为23.06 mg/cm^(3),孔隙率为82.09%。在3组分的协同作用下,复合气凝胶对于Cu^(2+)、Pb^(2+)、Co^(2+)、Cd^(2+)这4种金属离子的吸附效果明显优于单一组分的气凝胶材料。Sodium alginate(SA),graphene oxide(GO),and terminal amino hyperbranched polymer(HBP-NH_(2))are used as raw materials to frame a SA/GO/HBP-NH_(2)composite aerogels by the sol-gel and freeze-drying method.The preparation mechanism,morphology,mechanical properties and metal ion adsorption capacity of the composite aerogels are analyzed and tested in this work.The results show that the three components of SA/GO/HBP-NH_(2) composite aerogels are mainly bonded by the hydrogen bonds between SA and GO and the amide bonds between GO and HBP-NH_(2),and GO-HBP-NH_(2) are evenly dispersed in the aerogel system.When the mass concentration of the composite aerogel is 2.0%,the mass ratio of three components SA,GO and HBP-NH_(2)is 2.00∶0.06∶0.08,and the compressive strength of the composite aerogel could reach 593.91 k Pa,the density is 23.06 mg/cm^(3),and the porosity is 82.09%.Under the synergistic effect of the three components,the composite aerogels have better adsorption effect on the four metal ions of Cu^(2+),Pb^(2+),Co^(2+)and Cd^(2+)than the single component aerogel material.

关 键 词：海藻酸钠 氧化石墨烯 端氨基超支化聚合物 气凝胶 吸附 

分 类 号：X791[环境科学与工程—环境工程]