| CMC对石墨-H_2O分散液稳定性的影响 |
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| 引用本文： | 王恒飞,黄芸,何伟,张其土. CMC对石墨-H_2O分散液稳定性的影响[J]. 材料科学与工程学报, 2009, 0(3) |
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| 作者姓名： | 王恒飞 黄芸 何伟 张其土 |
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| 作者单位： | 南京工业大学材料科学与工程学院; |
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| 基金项目： | 国家部委科技资助项目(JPPT-1251) |
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| 摘 要： | 选用羧甲基纤维素钠(CMC)作为分散剂,制备了稳定性较好的石墨-H2O分散液。通过测定石墨-H2O分散液的吸光度和Zeta电位,探讨了不同CMC添加量、pH值、球磨时间对石墨-H2O分散液稳定性的影响,并分析了作用机理。结果表明:以石墨质量为基准,CMC用量大于4.5%时,分散液稳定性较好;该体系中,主要通过静电斥力使石墨粒子保持稳定,Zeta电位绝对值与吸光度有良好的对应关系,Zeta电位绝对值越高,吸光度越大,分散液稳定性越好;pH值对分散液的稳定性影响很大,pH=9～10时,分散液稳定性最好;随着球磨时间的增大,石墨粒径越来越小,球磨180min时,得到平均粒径为2.284μm的石墨-H2O分散液;石墨-H2O分散液的粒径分布及粘度曲线表明,加入CMC使石墨粒子在水中达到良好的分散。
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| 关 键 词： | 分散 石墨 羧甲基纤维素钠 |
Effect of CMC on Stability of Graphite-H_2O Dispersion |
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| WANG Heng-fei,HUANG Yun,HE Wei,ZHANG Qi-tu. Effect of CMC on Stability of Graphite-H_2O Dispersion[J]. Journal of Materials Science and Engineering, 2009, 0(3) |
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| Authors: | WANG Heng-fei HUANG Yun HE Wei ZHANG Qi-tu |
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| Affiliation: | College of Materials Science and Engineering;Nanjing University of Technology;Nanjing 210009;China |
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| Abstract: | CMC was chosen as dispersant, and graphite-H_2O dispersion with high stability was prepared. Some potential factors related to the stability of dispersion such as CMC content, pH value, and ball milling time were studied by testing the Zeta potential and absorbency, and the mechanism was also analyzed. It was found that the good stability of dispersion was achieved under the condition of adding more than 4.5% (wt) of CMC based on the weight of graphite, and there is a corresponding relation between absolute... |
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| Keywords: | dispersion graphite carboxymethylcellulose sodium |
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