张婷婷   

Professor
Supervisor of Doctorate Candidates
Supervisor of Master's Candidates

Main positions: 大工书院党委副书记兼副院长

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Language:English

Paper Publications

Title of Paper:碳纳米管的表面修饰及分散机理研究

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Date of Publication:2021-01-17

Journal:中国矿业大学学报

Volume:41

Issue:5

Page Number:758-763

ISSN No.:1000-1964

Key Words:碳纳米管;表面修饰;分散性;机理

Abstract:为了探讨多壁碳纳米管(MWCNTs)在水性体系中的分散性及分散机理,以阿拉伯胶(GA)为分散剂(SAA),采用SAA超声处理法对MWCNTs进行表面修饰,制备了分散性能良好的MWCNTs悬浮液.采用紫外分光光谱吸光度法(UV-vis)定量分析及TEM测试表征了GA对MWCNTs分散性能的影响,结果表明:当GA质量浓度为0.45g/L时,悬浮液中MWCNTs质量浓度达到最大值,为初始质量浓度的90.67%,且悬浮液相当稳定,静置80h,MWCNTs质量浓度仅降低11.45%.通过测定等温吸附曲线对GA的吸附分散机理进行了分析和讨论,结果表明:GA在MWCNTs表面为典型的"SL"型两阶段吸附,当GA质量浓度为0.45g/L时,在MWCNTs表面达到吸附饱和状态.GA能够通过其分子长链的包覆作用改善MWCNTs的亲水性和分散性.

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