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纳米、微米一水草酸钙和二水草酸钙对非离子表面活性剂NP-40的吸附差异

温小玲 ,  甘琼枝 ,  欧阳健明

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引用本文: 温小玲, 甘琼枝, 欧阳健明. 纳米、微米一水草酸钙和二水草酸钙对非离子表面活性剂NP-40的吸附差异[J]. 无机化学学报, 2015, 31(10): 2021-2029. doi: 10.11862/CJIC.2015.266 shu
Citation:  WEN Xiao-Ling, GAN Qiong-Zhi, OUYANG Jian-Ming. Adsorption of Nonionic Surfactant NP-40 on Micron/Nano Calcium Oxalate Monohydrate and Dihydrate Crystals[J]. Chinese Journal of Inorganic Chemistry, 2015, 31(10): 2021-2029. doi: 10.11862/CJIC.2015.266 shu

纳米、微米一水草酸钙和二水草酸钙对非离子表面活性剂NP-40的吸附差异

  • 1.

    暨南大学生物矿化与结石病防治研究所, 暨南大学化学系, 广州 510632

    • 通讯作者: 欧阳健明,E-mail:toyjm@jnu.edu.cn
  • 基金项目:

    国家自然科学基金(No.21371077)资助项目。 (No.21371077)

摘要: 为探究CaOx结石的形成机理,测定了不同浓度NP-40(cNP-40)存在下各尺寸COM或COD晶体的吸附量;采用X射线衍射和红外光谱研究吸附前后晶体是否发生晶相改变;采用ζ电位仪测定吸附后晶体表面的ζ电位随cNP-40的变化。结果表明:不同尺寸COM、COD对NP-40的吸附能力大小顺序为:50 nm > 100 nm > 1μm > > 3μm > 10μm;相同尺寸的晶体,COM的吸附量大于COD。随着cNP-40增加,3μm和10μm的COM、COD晶体的吸附曲线为S型,而50 nm、100 nm、1μm的COM、COD晶体的吸附曲线为直线型。加入NP-40后,ζ电位绝对值与各晶体的吸附密度成正相关。提出了草酸钙晶体吸附NP-40的分子模型。晶体尺寸越小,对NP-40的吸附量越大。非离子表面活性剂虽然自身不带电荷,但吸附到COM、COD晶体表面后可以通过位阻斥力来增加晶体悬浮液的稳定性,有利于抑制草酸钙结石的形成。

English

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  • 收稿日期:  2015-03-24
  • 网络出版日期:  2015-08-26
通讯作者: 陈斌, bchen63@163.com
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