| 引用本文: | 王宝民,马海楠,张源,Chuan Fook Lai.纳米碳纤维表面修饰及其在水溶液中的分散[J].材料科学与工艺,2014,22(4):41-48.DOI:10.11951/j.issn.1005-0299.20140408. |
| WANG Baomin,MA Hainan,ZHANG Yuan,CHUAN Fook Lai.Surface decoration and dispersion properties of carbon nanofibers in aqueous solution[J].Materials Science and Technology,2014,22(4):41-48.DOI:10.11951/j.issn.1005-0299.20140408. |
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| 摘要: |
| 为了研究纳米碳纤维(CNFs)在水溶液中的分散情况,对其进行高温纯化处理,以甲基纤维素(MC)为分散剂,制备分散良好的CNFs悬浮液.采用差热分析(DTA)和热重分析(TGA)研究了高温处理对CNFs的影响,通过测定悬浮液的紫外可见光吸光度、等温吸附曲线、zeta电位及表面张力等方法研究了MC对CNFs分散性能的影响,并讨论分析了MC对CNFs的分散机理.结果表明:MC的加入使CNFs悬浮液的zeta电位由-15.4 mV升至0,表面张力由38.87 mN/m降至36.54 mN/m；等温吸附曲线表明MC在CNFs的表面为“单阶段吸附”,当MC的质量浓度达到0.4 g/L时,MC在CNFs表面饱和吸附；当CNFs达到最佳分散状态时,MC与CNFs的质量比为21. |
| 关键词: 纳米碳纤维 甲基纤维素 分散 增强 表面修饰 |
| DOI：10.11951/j.issn.1005-0299.20140408 |
| 分类号:TQ170.4 |
| 基金项目:国家自然科学基金资助项目(51278086)；中国石油科技创新基金资助项目(2013D-5006-0606)；大连市科技计划资助项目(2012A13GX024)；海岸和近海工程国家重点实验室开放基金资助项目(LP1109)；中央高校基本科研业务费专项资金资助项目(DUT11NY11)；河南省科技开放合作项目(142106000023). |
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| Surface decoration and dispersion properties of carbon nanofibers in aqueous solution |
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WANG Baomin1, MA Hainan1, ZHANG Yuan1, CHUAN Fook Lai2
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(1.Laboratory of Building Materials, School of Civil Engineering, Dalian University of Technology, Dalian 116024, China; 2. Department of Civil and Structural Engineering, University Kebangsaan Malaysia, Bandar Baru Bangi 43600, Malaysia)
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| Abstract: |
| Carbon nanofibers(CNFs) are easy to aggregate together. To solve this problem, CNFs were purified by high temperature treatment and stable homogenous CNF suspension was obtained by using methylcellulose (MC) as a surfactant. The purification of CNFs and the homogenous CNF suspension were investigated by differential thermal analysis, thermo-gravimetric analysis, ultraviolet absorbency and zeta potential. Furthermore, the isotherm adsorption of MC on CNFs and surface tension of CNFs in MC solution were studied. The dispersion mechanism of CNFs in aqueous MC solution was discussed. The results showed that the zeta potentials of CNFs increased progressively from -15.4 mV to 0, and the surface tension decreased from 38.87 mN/m to 36.54 mN/m. The isotherm adsorption of MC showed an adsorption platform, and the isotherm reached the saturation plateau at MC concentration of about 0.4 g/L. The optimum MC to CNFs ratio of 21 by mass was required to achieve dispersions with maximum achievable dispersion of CNFs in the aqueous MC solution. |
| Key words: carbon nanofibers (CNFs) methylcellulose (MC) dispersion reinforced surface decoration |
