Scholarlink

<p>It is essential to understand the modification mechanism of hydrophobicity nano-CaCO<sub>3</sub> to their potential application in different fields of chemistry. However, the water absorption of hydrophobicity nano-CaCO<sub>3</sub> is seldom studied. In this study, Raman, BET and TGA experiments were performed on nano-CaCO<sub>3</sub> samples to obtain surfactants contents and microstructure characteristics. SEM, TEM and DSL results showed that the nano-CaCO<sub>3</sub> modified by stearic acid and sodium stearate had larger particle size and smaller nanoclusters. In the water vapor adsorption test, the order of saturation adsorption capacity was nano-CaCO<sub>3</sub>(PCC) &gt; nano-CaCO<sub>3</sub> modified by sodium stearate(PCC-Sa-Na) &gt; nano-CaCO<sub>3</sub> modified by stearic acid(PCC-Sa), and XPS results showed that PCC-Sa had more hydrophobic groups than PCC-Sa-Na, which also explained that the hydrophobicity of PCC modified by stearic acid and sodium stearate was improved by increasing the hydrophobic bond on the surface of CaCO<sub>3</sub> and reducing the hydrophilic groups. Our analysis provides a path for the design and the prediction of hydrophobicity of nano-CaCO<sub>3</sub>, which is the main focus of our work.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effect of stearic acid and sodium stearate on hydrophobicity of nano calcium carbonate and mechanism of water vapor adsorption

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年1月2日

查看全文
  • Yifeng Huang,
  • Lanyu Ma,
  • Zhimin Huang,
  • Wenqin Lai,
  • Yihua Zheng,
  • Mengxue Xu,
  • Aimei Yang,
  • Lige Liang,
  • Zengmeng Lu,
  • Juying Zhou,
  • Yong Zhu

摘要

It is essential to understand the modification mechanism of hydrophobicity nano-CaCO3 to their potential application in different fields of chemistry. However, the water absorption of hydrophobicity nano-CaCO3 is seldom studied. In this study, Raman, BET and TGA experiments were performed on nano-CaCO3 samples to obtain surfactants contents and microstructure characteristics. SEM, TEM and DSL results showed that the nano-CaCO3 modified by stearic acid and sodium stearate had larger particle size and smaller nanoclusters. In the water vapor adsorption test, the order of saturation adsorption capacity was nano-CaCO3(PCC) > nano-CaCO3 modified by sodium stearate(PCC-Sa-Na) > nano-CaCO3 modified by stearic acid(PCC-Sa), and XPS results showed that PCC-Sa had more hydrophobic groups than PCC-Sa-Na, which also explained that the hydrophobicity of PCC modified by stearic acid and sodium stearate was improved by increasing the hydrophobic bond on the surface of CaCO3 and reducing the hydrophilic groups. Our analysis provides a path for the design and the prediction of hydrophobicity of nano-CaCO3, which is the main focus of our work.