碳纳米管悬浮液分散质量影响因素试验研究  

Experimental study on influencing factors of dispersion quality of carbon nanotubes in aqueous solution

作　　者：秦煜 唐元鑫[3] 阮鹏臻 王威娜 胡魏凯[2] QIN Yu;TANG Yuan-xin;RUAN Peng-zhen;WANG Wei-na;HU Wei-kai(CREEC (Chongqing) Survey,Design and Research Co.,Ltd.,Chongqing 400023,China;School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China;Shanghai Municipal Engineering Design Institute (Group)Co.,Ltd.,Shanghai 200092,China;Guangxi Communications Investment Group Liuzhou Expressway Operation Co.,Ltd.,Liuzhou 545036,China)

机构地区：[1]中铁二院重庆勘察设计研究院有限责任公司,重庆400023 [2]重庆交通大学土木工程学院,重庆400074 [3]上海市政工程设计研究总院(集团)有限公司,上海200092 [4]广西交通投资集团柳州高速公路运营有限公司,广西柳州545036

出　　处：《应用化工》2022年第5期1285-1290,共6页Applied Chemical Industry

基　　金：国家自然科学基金项目(51978114,52078091);重庆市自然科学基金项目(cstc2019jcyj-msxmX0796,cstc2020jcyj-msxmX0624)。

摘　　要：选取常见的5种表面活性剂,开展碳纳米管悬浮液的分散性和稳定性实验,定量分析了超声时长、表面活性剂掺比和碳纳米管浓度对悬浮液分散性的影响,量化了使用表面活性剂的碳纳米管悬浮液稳定性。结果表明:①超声时长对碳纳米管悬浮液的分散性有显著影响,采用功率为270 W的超声处理,超声40 min,悬浮液的分散性趋于平稳;②在平均最佳超声时长下,SDBS作表面活性剂具有最优的分散效果,吸光度峰值达到1.729;③随着碳纳米管浓度的增加,分散性呈波形变化,SDBS和Triton X-100作表面活性剂,均在碳纳米管浓度为6 g/L时,表现出最佳的分散效果;④SDBS作表面活性剂,短期内吸光度值下降较少,有良好的短期稳定性,Triton X-100作表面活性剂,短期内吸光度值下降较多,但7 d后下降较少,有较好的长期稳定性。Five common surfactants were selected to carry out the dispersion and stability tests of carbon nanotube suspensions.The effects of ultrasonic duration,surfactant ratio and carbon nanotube concentration on the dispersion of carbon nanotube suspensions were quantitatively analyzed.The stability of carbon nanotube suspensions using surfactants was quantified.The results showed that the dispersion of the suspension is stable when the ultrasonic power is 270 W and the ultrasonic time is 40 min;SDBS has the best dispersion effect under the average optimal ultrasonic time,and the absorbance peak value reaches 1.729;with the increase of the concentration of carbon nanotubes,the dispersion of SDBS changes in waveform,when the concentration of CNTs was 6 g/L,SDBS and Triton X-100 had the best dispersion effect;when SDBS was used as surfactant,the absorbance value decreased less in the short term and had good short-term stability;when Triton X-100 was used as surfactant,the absorbance value decreased more in the short term,but decreased less after 7 d,so it had better long-term stability.

关 键 词：碳纳米管 悬浮液 分散性 稳定性 表面活性剂 

分 类 号：TQ127.1[化学工程—无机化工] TQ423.9