氨丙基功能化二氧化硅的制备及结构表征  

Synthesis and characterization of aminopropylated silica

作　　者：郑金颖[1] 耿艳楼[1] 赵新强[1] 王延吉[1] 

机构地区：[1]河北工业大学绿色化工与高效节能河北省重点实验室,天津300130

出　　处：《功能材料》2008年第9期1562-1566,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(20576025);河北省自然科学基金资助项目(B2007000010)

摘　　要：分别采用液相法和溶胶-凝胶法制备了氨基功能化的二氧化硅(APS),利用FTIR,BET,元素分析和TG等技术对制备的APS进行了结构表征。在液相法制备APS的过程中,为使SiO2表面有更多的羟基与氨丙基三乙氧基硅烷(APTES)发生反应,采用4种方法对SiO2表面进行了预处理。结果表明,微波辐射效果最好,可使SiO2表面羟基数由1.08(个/nm2)增加到1.29(个/nm2)。采用液相法制备的APS中氨丙基负载量为8.59%(质量分数),活性位(氨丙基)浓度为1.49mmol/g。采用溶胶-凝胶法制备的APS中氨丙基负载量为6.88%(质量分数),活性位(氨丙基)浓度为1.19mmol/g,均较液相法制备的APS低。Aminopropylated silica was synthesized separately via liquid-phase method and sol-gel method and was characterized by means of FTIR, BET, elemental analysis and TG analysis. The surface of silica was pretreated via four kinds of methods to increase the quantity of hydroxyl group content and the result showed that micro- wave-activating was the most effective method： the number of hydroxyl group on the silica surface increased from 1.08-1.29/nm^2. The loading of aminopropyl in the APS synthesized via liquid-phase method was 8.59wt% and the functional group concentration of aminopropyl was 1.49mmol/g. However, the loading and functional group concentration of aminopropyl in the APS synthesized via sol-gel method was 6.88wt% and 1.19mmol/g, respectively.

关 键 词：微波辐射 氨丙基三乙氧基硅烷 氨丙基功能化二氧化硅 液相法 溶胶-凝胶法 

分 类 号：O621.3[理学—有机化学]