无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2020, Vol. 52 ›› Issue (4): 29-32.doi: 10.11962/1006-4990.2019-0271

• 研究与开发 • 上一篇    下一篇

碳酸钙晶型的肉豆蔻酸调控研究

王倩倩1,白春华1(),任慧2,李光辉2   

  1. 1.内蒙古科技大学矿业研究院,内蒙古包头014010
    2.内蒙古科技大学矿物加工工程系
  • 收稿日期:2019-10-20 出版日期:2020-04-10 发布日期:2020-04-22
  • 作者简介:王倩倩(1994— ),女,硕士研究生,研究方向为矿物加工碳酸钙改性;E-mail: 118764958@qq.com。
  • 基金资助:
    国家自然科学基金(51464037);内蒙古自然科学基金(2017MS(LH)0525)

Crystal structure regulation of calcium carbonate by adding tetradecanoic acid

Wang Qianqian1,Bai Chunhua1(),Ren Hui2,Li Guanghui2   

  1. 1.Inner Mongolia University of Science and Technology Mining Research Institute,Baotou 014010,China
    2.Department of Mineral Processing Engineering,Inner Mongolia University of Science and Technology
  • Received:2019-10-20 Published:2020-04-10 Online:2020-04-22

摘要:

采用硝酸钙和碳酸钠的复分解反应制备碳酸钙,通过加入肉豆蔻酸对碳酸钙的晶体结构和表面性质进行调控,采用SEM、XRD、FT-IR、TG和XPS等方法研究了添加肉豆蔻酸对碳酸钙晶体结构的影响。结果表明,加入肉豆蔻酸之后,碳酸钙的晶体结构由球霰石变成方解石,形貌由球形变成了不规则的长方体形;碳酸钙的表面全部被活化,由亲水性变成疏水性,表面疏水后,碳酸钙的团聚程度明显降低;肉豆蔻酸的羧基阴离子和钙离子发生了化学结合反应,增强了碳酸钙结构的稳定性。总之,肉豆蔻酸的加入为碳酸钙的晶型调控与表面改性提供了一条简单的思路。

关键词: 碳酸钙, 肉豆蔻酸, 晶型

Abstract:

The calcium carbonate was prepared by double decomposition method.The crystal structure and surface properties of calcium carbonate were controlled by the addition of tetradecanoic acid.The effects on the crystal structure of calcium carbonate were studied by SEM,XRD,FT-IR,TG and XPS after the addition of tetradecanoic acid.Results showed that the crystal structure of calcium carbonate changed from vaterite to calcite after the addition of tetradecanoic acid,and the morphology changed from spherical to irregular cubic shape;the surface of calcium carbonate were wholly activated and hydrophobic,which reduced the degree of agglomeration of calcium carbonate.The interaction between tetradecanoic acid anion and calcium ion form a covalent binding which improves the stability of calcium carbonate particles.In conclusion,the addition of tetradecanoic acid can provide a method for crystal structure and surface modification of calcium carbonate.

Key words: calcium carbonate, tetradecanoic acid, crystal structure

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