摘要
以溶剂热法合成Fe_3O_4磁性微球,并以正硅酸四乙酯(TEOS)为硅源,通过溶胶-凝胶法在Fe_3O_4磁性微球表面包裹SiO_2壳层,利用3-(异丁烯酰氧)三甲氧基硅烷(APTES)对SiO_2壳层进行修饰后,通过交联沉淀聚合法在SiO_2壳层外部合成聚丙烯酸(PAA)层,形成Fe_3O_4@SiO_2@PAA多层核-壳结构复合微球。利用透射电子显微镜(TEM)、红外光谱(FT-IR)和热重分析仪(TGA)对合成材料的形貌和结构进行表征,并就多层结构复合微球对染料的吸附性能进行研究。结果显示:制备的Fe_3O_4磁性微球具有良好的水分散性,其表面可分步包裹SiO_2和PAA壳层,形成Fe_3O_4@SiO_2@PAA多层核-壳结构复合微球,该复合微球对罗丹明6G和亚甲基蓝的吸附量分别达到1.04和1.14 mg/g(吸附质量浓度为2.4 mg/L,吸附时间为10 min),表现出良好的染料吸附性能。
In the present study, Fe3O4 magnetic nanoparticles were fabricated by solvothermal method. Tetraethyl ortho-silicate （TEOS） was used as precursor to fabricate a layer of SiO2 on the surface of Fe304 nanoparticles. 3-（methac-ryloyl oxygen） trimethoxy silane （APTES） was used as silane coupling agent to modify the surface of SiO2 @ Fe3 04 with double carbon bonds, then Fe3 O4/silicon dioxide/poly (acrylate acid） (Fe304 @ SiO2 @ PAA） multi-layer core-shell structural composite microspheres were prepared by cross-linking precipitation polymerization of acrylate acid and divinyl benzene monomers without the use of surfactants and stabilizers. The as-synthesized particles have been charac-terized by means of transmission electron microscopy （TEM）, Fourier transform infrared spectroscopy （FT-IR） and thermogravimetric analysis （TGA）. The size of the prepared F%O4 nanoparticles was about 150-250 nm. The Fe304 nanoparticles exhibited good water-solubility and were successfully encapsulated by SiO2 shell. The PAA was success-fully grafted onto the surface of SiO2 to form Fe304@ SiO2@ PAA multilayer core-shell composite microspheres. The results of Fe304@ SiO2@ PAA microspheres showed high performance in the adsorption of Rhodamine 6G and meth-ylene blue. The 10-minute adsorption reached 1.04 mg/g and 1.14 mg/g.
作者
徐鹏
梁旭光
曹小勇
刘松灿
王利莹
高勤卫
XU Peng;LIANG Xuguang;CAO Xiaoyong;LIU Songcan;WANG Liying;GAO Qinwei(College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China;Jiangsu Key Lab. for the Chemistry ＆ Utilization of Agricultural and Forest Biomass, Nanjing 210037, China;Nanjing Institute of Supervision ＆ Testing on Product Quality, Nanjing 210028, China;College of Forestry, Nanjing Forestry University, Nanjing 210037, China)
出处
《林业工程学报》
北大核心
2018年第3期52-56,共5页
Journal of Forestry Engineering
基金
江苏省自然科学基金(青年基金)(BK20130969)
江苏省生物质绿色燃料与化学品重点实验室开放课题(JSBGFC14015)
关键词
多层核壳结构
复合微球
染料
吸附性能
multilayer core-shell structural
composite microspheres
dye
adsorptive property
