直接置换插层法0.85nm水合高岭石的制备.pdf

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1、第27卷第6期无机化学学报V01．27NO．62011年6月CHINESEJ0URNAL0FIN0RGANICCHEMISTRYl12l一1127直接置换插层法0．85am水合高岭石的制备徐剑锋1梁怡瑛1马宁-陈丽昆2李勇2杜丕一，(浙江大学材料系，硅材料国家重点实验室，杭9’z,I310027)(中国高岭土公司，苏州215151)摘要：以高岭石／尿素插层复合物作为中问相，利用简单的直接置换插层法制备了1=0．85nnl的水合高岭石。利用x射线衍射、红外光谱、扫描电镜表征处理前后高岭石结构与形貌的变化。结果表明：尿素插层后的高岭石层问距从：0．72nm增

2、大到doo1：1．08nm．经不同温度酸洗或水洗后，插层复合物转变成层间有水分子的水合高岭(doo1=0．85nin)．且高岭石晶粒厚度明显从约25nrfl减小到约10nm。在高温条件下形成的水合高岭石含量最高．90℃水洗时dooj=0．85nin水合高岭石的转化率接近70％．这种水合高岭石具有进一步的置换插层能力．是一种制备其他高岭石插层复合物很好的前驱体。与乙二醇形成dco1=1．10nin乙二醇／高岭石插层复合物．其置换率达到100％关键词：高岭石；插层；插层前驱体；水合高岭石中图分类号：O613．72；P587．964文献标识码：A文章编号：10

3、01—4861(2011)06一l121—07PreparationofO．85nmHydratedKaolinitebyDirectDisplacementIntercalationXUJian—FengLIANGYi—YingMANingCHENLi·KunLIYongDUPi—Yi，(StateKeyLaboratoryofSiliconMaterials，DepartmentofMaterialsScienceandEngineering,ZhejiangUniversity,Hangzhou310027，China)(2ChinaKaolinC

4、layCompany,Suzhou，jiangsu215151，China)Abstract：Thehydratedkaolinitewithd001=O．85nmwaspreparedwithsimpledirectdisplacementintercalationmethodbyusingkaolinite—ureaintercalationcompoundasanintermediate．Themicrostructureandmorphologyofkaolinitebeforeandafterintercalationwerecharacter

5、izedbyX—raydiffraction，infraredspectroscopyandscanningelectronmicroscopy．Theresultsshowthatthebasalspacingofthekaoliniteincreasesfrom如1=0．72nmtol=1．08nmafterintercalationwithurea．Afterbeinggraftedwithwaterthroughwashingwithacidorwateratdifferenttemperatures，thehydratedkaolinitewi

6、thd001=O．85nmisobtained．Andthegrainthicknessofkaolinitedecreasessignificantlyfrom25nmtoabout10nm．Thehighestcontentofthehydratedkaoliniteappearsathightemperature，whichisnearly70％bywashingwithwaterat90℃．Thed00l=O．85nmhydratedkaolinitederivedfromkaolinite．ureacompoundhasfurtherinter

7、calationability．andmayserveasanexcellentprecursorforpreparingotherkaoliniteintercalationcompounds．Thetransformationrateofabout100％canbeobtainedforkaolinite．ethyleneglycolintercalationcompoundfromthehydrmedkaolinite．Keywords：kaolinite；intercalation；intercalationprecursor；hydratedk

8、aolinite收稿日期：2010．1l-29。收修改稿日期：2011-Ol一1