一种新型纳米二氧化硅微囊的制备  

A novel method for preparing nanometer silicon dioxide microcapsules

作　　者：李筱晗 朱晓莲 王帅兵 孟昭辉[2] 李春明 刘巍[1] LI Xiao-han;ZHU Xiao-lian;WANG Shuai-bing;MENG Zhao-hui;LI Chun-ming;LIU Wei(School of Environment and Chemical Engineering,Tianjin Polytechnic University,Tianjin 300387,China;Tianjin Colouroad Coatings & Chemicals Co.,Ltd.,Tianjin 300387,China)

机构地区：[1]天津工业大学环境与化学工程学院,天津300387 [2]天津科瑞达涂料化工有限公司,天津300387

出　　处：《现代化工》2019年第6期126-129,共4页Modern Chemical Industry

基　　金：国家自然科学基金项目(21504063);天津市高等学校大学生创新训练计划项目(201710058052);天津市企业科技特派员项目(18JCTPJC61100);天津市教委科研计划项目(2018KJ200)

摘　　要：以正硅酸乙酯(TEOS)为硅源,Na2HPO4·12H2O-NaOH碱性缓冲溶液为催化剂,采用溶胶-凝胶法制备纳米级单分散的SiO2微囊。通过扫描电子显微镜、透射电子显微镜和傅里叶红外光谱仪等分析手段对所制备的纳米SiO2微囊进行表征。结果表明,所制得的纳米SiO2微囊形貌规整,具有较大的空腔结构,微囊的直径大小为250~400nm,囊壁厚度为15~35nm,分散性良好,具有单分散或窄分散性。Nano-scale mono-dispersed SiO2 microcapsules are synthesized by the sol-gel method with Na2HPO4 12H2O-NaOH alkaline buffer solution as catalyst,ethyl orthosilicate ( TEOS) as silicon source.The as-synthesized SiO2 microcapsules are characterized and analyzed by scanning electron microscope (SEM), transmission electron microscope (TEM) and Fourier transform infrared spectrometer ( FT-IR). The results indicate that the as-prepared SiO2 microcapsules are in good dispersion, uniform size and have the regular structures with a large cavity.The diameter of the microcapsules can be controlled ranging from 250 nm to 400 nm, and the thickness of the capsule shell ranging from 15 nm to 35 nm.

关 键 词：溶胶-凝胶法 SiO2微囊 纳米级微囊 

分 类 号：TQ316.343[化学工程—高聚物工业]