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烷胺双甲基膦酸改性碳酸钙的作用机理(英文)
作者:丁浩 许霞 杜高翔 朱希耀  
单位:中国地质大学材料科学与工程学院  
关键词:碳酸钙  表面改性  作用机理  烷胺双甲基瞵酸  化学吸附 
分类号:O611.3
出版年,卷(期):页码:2008,36(12):1785-1790
DOI:
摘要:

对烷胺双甲基膦酸(alkyl amine dimethyl phosphonic acid,WTP-08)以机械力化学方法改性碳酸钙过程中的作用机理进行了研究。结果表明:碳酸钙经改性后表面由亲水性转变为疏水性,WTP-08结构中P=O和P—O键之间产生p-π共轭效应后与碳酸钙表面Ca2+形成化学键合,P—OH与碳酸钙表面CO32-水化羟基形成氢键,WTP-08在碳酸钙表面形成了牢固的化学吸附,由此建立了WTP-08在碳酸钙表面的化学吸附模型。

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The action mechanism of modifying calcium carbonate using alkyl amine dimethyl phosphonic acid(WTP–08) as a modi-fication agent by mechano-activated method was investigated.The results indicate that the hydrophilic surface of calcium carbonate is transformed into a hydrophobic surface after it has been modified.A chemical reaction between the P—O and P=O bond of WTP–08 and Ca2+ on the surface of calcium carbonate occurs after the p–π conjugative effect between the P—O and P=O bond is formed,and the hydrogen bond between the P—OH bond of WTP–08 and the hydroxyl groups produced by CO32– hydration is formed.A firm chemical adsorption of WTP–08 on the calcium carbonate surface is formed,and the chemical adsorption model of WTP–08 on the calcium carbonate surface is thus established.

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基金项目:
国家自然科学基金(50064087)资助项目
作者简介:
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参考文献:

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