碳酸钙-二氧化钛复合颗粒的制备及其颜料性能

Preparation of CaCO₃-TiO₂ Composite Particles and Their Pigment Properties.

作者信息

Sun Sijia, Ding Hao, Hou Xifeng

机构信息

Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Xueyuan Road, Haidian District, Beijing 100083, China.

出版信息

Materials (Basel). 2018 Jul 3;11(7):1131. doi: 10.3390/ma11071131.

DOI:10.3390/ma11071131

PMID:29970855

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6073709/

Abstract

CaCO₃-TiO₂ composite particles were prepared with calcium carbonate (CaCO₃) and TiO₂ in stirred mill according the wet grinding method. The pigment properties, morphology, and structure of CaCO₃-TiO₂ composite particles and the interaction behaviors between CaCO₃ and TiO₂ particles were explored. In the CaCO₃-TiO₂ composite particles, TiO₂ is uniformly coated on the surface of CaCO₃ and the firm combination between CaCO₃ and TiO₂ particles is induced by the dehydration reaction of surface hydroxyl groups. CaCO₃-TiO₂ composite particles have similar pigment properties to pure TiO₂. The hiding power, oil absorption, whiteness and ultraviolet light absorption of composite particles are close to those of pure TiO₂. The application performance of CaCO₃-TiO₂ composite particles in the paint is consonant with their pigment properties. The contrast ratio of the exterior paint containing CaCO₃-TiO₂ composite particles is equivalent to that of the paint containing the same proportion of pure TiO₂.

摘要

采用碳酸钙（CaCO₃）和二氧化钛（TiO₂），按照湿法研磨法在搅拌磨中制备了CaCO₃-TiO₂复合颗粒。对CaCO₃-TiO₂复合颗粒的颜料性能、形态和结构以及CaCO₃与TiO₂颗粒之间的相互作用行为进行了探究。在CaCO₃-TiO₂复合颗粒中，TiO₂均匀包覆在CaCO₃表面，且表面羟基的脱水反应促使CaCO₃与TiO₂颗粒牢固结合。CaCO₃-TiO₂复合颗粒具有与纯TiO₂相似的颜料性能。复合颗粒的遮盖力、吸油量、白度和紫外线吸收性能与纯TiO₂相近。CaCO₃-TiO₂复合颗粒在涂料中的应用性能与其颜料性能相符。含CaCO₃-TiO₂复合颗粒的外墙涂料的对比率与含相同比例纯TiO₂的涂料相当。