两步法制备海泡石纳米纤维  

Two-step preparation of natural sepiolite nanofibers

作　　者：李思盈 周超 李传强 李世民 何阳 LI Si-ying;ZHOU Chao;LI Chuan-qiang;LI Shi-min;HE Yang(School of Materials Science and Engineering,Chongqing Jiaotong University,Chongqing 400074,China;School of Environment and Resources,Chongqing Technology and Business University,Chongqing 400067,China)

机构地区：[1]重庆交通大学材料科学与工程学院,重庆400074 [2]重庆工商大学环境与资源学院,重庆400067

出　　处：《应用化工》2023年第3期726-729,共4页Applied Chemical Industry

基　　金：国家自然科学基金项目(51778096);在渝高校与中科院所属院所合作项目(HZ2021009)。

摘　　要：以天然海泡石为原料,采用两步法对海泡石进行纳米化处理,第一步使用自然沉降法去除杂质石英和滑石;第二步用硫酸或盐酸作为质子供体,草酸作为助剂,对海泡石进行提纯和剥离。通过热重分析仪(TG)、扫描电子显微镜(SEM和EDS)、X射线衍射(XRD)、傅里叶变换红外光谱仪(FTIR)进行表征。结果表明,盐酸处理效果优于硫酸,且3 mol/L盐酸效果最佳,直径在50~200 nm的海泡石纳米纤维最多。Natural sepiolite was used as the raw material for the nanosizing treatment of sepiolite using a two-step method,namely:the first step used natural sedimentation to remove impurities quartz and talc;the second step purified and stripped sepiolite with sulfuric acid or hydrochloric acid as the proton donor and oxalic acid as the auxiliary.Characterization by thermogravimetric analyzer(TG),scanning electron microscopy(SEM and EDS),X-ray diffraction(XRD),and Fourier transform infrared spectroscopy(FTIR)revealed that hydrochloric acid treatment was better than sulfuric acid,and 3 mol/L hydrochloric acid had the best effect,and the most sepiolite nanofibers with diameters of 50~200 nm were found.

关 键 词：天然海泡石 自然沉降法 酸处理 纳米纤维 

分 类 号：TQ170.6[化学工程—硅酸盐工业]