颗粒疏水聚团制备碳酸钙-TiO_2复合颜料实验研究  

Study on Preparation of TiO_2-coated CaCO_3 Composite Pigments by Hydrophobic Agglomeration Method

作　　者：孙思佳[1] 丁浩[1] 侯喜锋[1] 沈凯[1] Sun Sijia;Ding Hao;Hou Xifeng;Shen Kai(School of Materials Science and Technology,China University of Geosciences(Beijing), Beijing 100083)

机构地区：[1]中国地质大学(北京)材料科学与工程学院,北京100083

出　　处：《非金属矿》2017年第3期26-29,共4页Non-Metallic Mines

基　　金：国家自然科学基金(51474194)

摘　　要：以通过改性获得表面诱导疏水性的碳酸钙(CaCO_3)和二氧化钛(TiO_2)颗粒为原料,对采用异质颗粒疏水聚团方法制备CaCO_3-TiO_2复合颜料进行了实验研究,对主要影响因素进行了考察和优化,对其性能和结构进行了表征。结果表明,CaCO_3-TiO_2复合颜料具有和钛白粉相当的颜料性能及表面疏水性,含TiO_2 60%复合颜料的遮盖力最高达到钛白粉的93.50%。CaCO_3-TiO_2复合颜料由CaCO_3表面包覆TiO_2为特征复合颗粒所组成,TiO_2在CaCO_3颗粒表面的包覆均匀、致密,二者结合方式为各自表面碳氢链之间的缔合。Using CaCO3and TiO2particles,which surface are hydrophobic due to organic modification,as raw materials,the preparation of TiO2-coated CaCO3composite pigments by hydrophobic agglomeration method was investigated.The properties and structure of TiO2-coated CaCO3composite pigments were characterized and evaluated.The results show that the TiO2-coated CaCO3composite pigments has the similar pigments properties to TiO2with hydrophobic surface,while the mass ratio of TiO2to composite pigments is60%,the hiding power of composite pigments reached93.50%of titanium dioxide.Meanwhile,the TiO2-coated CaCO3composite pigments are made up of the composite particles characterized as TiO2particles coating on CaCO3particles surface,and the coating was uniform,compact and firmly.The CaCO3and TiO2particles could combine by the association of organic carbon chains on their surface.

关 键 词：碳酸钙 二氧化钛 复合颜料 疏水聚团 

分 类 号：TD925.6[矿业工程—选矿] TQ629[化学工程—精细化工]