富钾板岩基气凝胶的制备及其性能研究  

Preparation and properties of potassium-rich slate-based aerogel

作　　者：陈佳 杨欣 赛华征 于汉清 付蕊 赵亚琼 CHEN Jia;YANG Xin;SAI Hua-zheng;YU Han-qing;FU Rui;ZHAO Ya-qiong(School of Chemistry and Chemical Engineering(Silicon Industry School),Inner Mongolia University of Science&Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学化学与化工学院(硅业学院),内蒙古包头014010

出　　处：《现代化工》2025年第4期96-101,109,共7页Modern Chemical Industry

基　　金：国家自然科学基金项目(52164013);内蒙古自治区科技计划项目(2020GG0152)。

摘　　要：为提取富钾板岩中的可溶性钾,将富钾板岩进行碱熔活化、酸化等反应,在提取钾元素的同时将其中的硅、铝元素运用溶胶-凝胶法制备出硅、铝氧化物的湿凝胶,通过超临界干燥法得到SiO_(2)气凝胶材料和SiO_(2)-Al_(2)O_(3)复合气凝胶材料。通过扫描电镜(SEM)、红外光谱(FT-IR)、接触角测量仪以及N_2吸脱附(BET)对制得的气凝胶材料进行表征测试。结果表明,SiO_(2)气凝胶粉末与SiO_(2)-Al_(2)O_(3)复合气凝胶粉末均具有连续网状的疏松多孔结构;SiO_(2)气凝胶及SiO_(2)-Al_(2)O_(3)复合气凝胶经过疏水修饰后在空气中与水滴的接触角均高于90°;疏水修饰对于SiO_(2)气凝胶孔径的影响较小,而经过疏水修饰后的SiO_(2)-Al_(2)O_(3)复合气凝胶的孔径明显减小。In order to extract the soluble potassium in potassium-rich slate,the slate is subjected to alkali melt activation and acidification,and potassium is extracted while silicon and aluminum elements in the slate are prepared into wet gels containing silicon and aluminum oxides via a sol-gel method.Then,SiO_(2)aerogel material and SiO_(2)-Al_(2)O_(3)composite aerogel material are obtained through supercritical drying method.Aerogel samples are characterized by means of scanning electron microscopy(SEM),infrared spectroscopy(FT-IR),contact angle measuring instrument and N_(2) adsorption and desorption(BET).Results show that both SiO_(2)aerogel powder and SiO_(2)-Al_(2)O_(3)composite aerogel powder have a continuous network of loose porous structure.The contact angles of both SiO_(2)aerogel and SiO_(2)-Al_(2)O_(3)composite aerogel,which pass through hydrophobic modification,with water droplet in air are higher than 90°.Hydrophobic modification has little effect on the pore size of SiO_(2)aerogel,while the pore size of SiO_(2)-Al_(2)O_(3)composite aerogel becomes smaller significantly after hydrophobic modification.

关 键 词：富钾板岩 超临界干燥 SiO_(2)气凝胶 SiO_(2)-Al_(2)O_(3)复合气凝胶 

分 类 号：TE992.3[石油与天然气工程—石油机械设备]