碳微球的离子化表面修饰  

Surface modification of carbon microspheres by ionization

作　　者：杨永珍[1,2] 韩艳星[1,3] 李莎[1,3] 刘红艳[1,3] 刘旭光[1,3] 许并社[1,2] 

机构地区：[1]新材料界面科学与工程教育部重点实验室(太原理工大学) [2]太原理工大学材料科学与工程学院 [3]太原理工大学化学化工学院,山西太原030024

出　　处：《化工学报》2010年第10期2662-2666,共5页CIESC Journal

基　　金：国家自然科学基金项目(20971094);科技部国际合作项目( 2007DFA50940 );山西省国际合作项目(2009081018);山西省自然科学基金项目(2009011012-4);山西省回国留学人员科研项目(2008-31);山西省研究生优秀创新项目(20081008)~~

摘　　要：碳微球(CMSs)经HNO3和H2O2混酸处理后,与NaOH碱溶液进行离子化反应,考察离子化反应前后CMSs表面性质的差异;通过场发射扫描电子显微镜、元素分析等对产物的形貌和表面结构进行了分析,同时还考察了产物在不同溶剂中的溶解性差异。结果表明,HNO3和H2O2混酸处理得到的CMSs-(COOH)n与NaOH溶液进行反应后,生成大量—COONa离子基团,形成了CMSs-(COONa)n,其表层出现沟壑,在水中的分散性明显改善,亲水性显著增强;然而,NaOH对未经酸处理的CMSs修饰效果欠佳,团聚现象依然严重;由于CMSs-(COONa)n强的离子性,很难在有机溶剂中分散。Carbon microspheres （CMSs） were first oxidized with a mixture of concentrated H2O2 and HNO3,and alkali treatment onto the CMSs surface was perfomed by ionization with NaOH solution.The morphologies of all samples were characterized with field emission scanning electron microscopy and elemental analysis.The dispersibility of CMSs before and after modification in different solvents was studied.The results showed that the products were of rough surface and CMSs-（COONa）n ionic compound was formed after acid-and-alkali treatment.Their stability gradually changed from nonreactivity to hydrophilicity;but the properties of CMSs treated simply by NaOH without acid oxidation treatment were hardly improved and the products were hardly dispersed in organic solvents as a result of good ionization.

关 键 词：碳微球 离子化 修饰 

分 类 号：TB32[一般工业技术—材料科学与工程]