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首页> 外文期刊>Construction and Building Materials >Influence of super plasticizer and Ca(OH)_2 on the stability of functionalized multi-walled carbon nanotubes dispersions for cement composites applications
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Influence of super plasticizer and Ca(OH)_2 on the stability of functionalized multi-walled carbon nanotubes dispersions for cement composites applications

机译：超级增塑剂和Ca（OH）_2对水泥复合材料功能化多壁碳纳米管分散体稳定性的影响

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摘要

This work studies the effect of superplasticizer and Ca(OH)_2 on the stability of OH- functionalized multi walled carbon nanotube (MWCNT)/water dispersions produced via sonication. Dispersion of the MWCNT/water/superplasticizer dispersions was quantified using UV-Vis spectroscopy, the damage induced on the MWCNT was identified using RAMAN spectroscopy and the effect of Ca(OH)_2 stability of the dispersions was identified using Zeta potential and FTIR spectroscopy. It was found that Ca(OH)_2 affects the stability of MWCNT dispersions due to its interaction with negative charges of the OH- functional groups, which hinders the electrostatic repulsion between MWCNT and superplasticizer molecules, generating re-agglomeration of the MWCNT.
机译：这项工作研究了高效减水剂和Ca（OH）_2对通过超声处理产生的OH功能化多壁碳纳米管（MWCNT）/水分散体的稳定性的影响。 MWCNT /水/高效减水剂分散体的分散度使用紫外可见光谱法进行定量，通过RAMAN光谱法鉴定对MWCNT的诱导损伤，并使用Zeta电位和FTIR光谱法确定分散体的Ca（OH）_2稳定性。发现Ca（OH）_2由于其与OH-官能团的负电荷相互作用而影响MWCNT分散体的稳定性，这阻碍了MWCNT与超塑化剂分子之间的静电排斥，从而产生了MWCNT的再聚结。

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  • 来源
    《Construction and Building Materials》 |2013年第10期|771-778|共8页
  • 作者

    Oscar Mendoza; German Sierra; Jorge I. Tobon;

  • 作者单位

    Grupo del Cemento y Materiales de Construccion CEMATCO, Universidad Nacional de Colombia, Facultad de Minas, Medellin, Colombia,Calle 75 # 79A - 51 Bloque M17, Universidad Nacional de Colombia, Facultad de Minas, Medellin, Colombia;

    Grupo Ciencia y Tecnologia de Materiales CTM, Universidad National de Colombia, Facultad de Minas, Medellin, Colombia;

    Grupo del Cemento y Materiales de Construccion CEMATCO, Universidad Nacional de Colombia, Facultad de Minas, Medellin, Colombia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Carbon nanotubes; Dispersion; Sonication; Alkaline environment; Cement composites;

    机译：碳纳米管;分散;超声处理碱性环境;水泥复合材料;

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