Mass production and application of TiO2@CaCO3 composites in interior emulsion coatings

作者：Li, Zhen; Huang, Chunying; Guo, Lijie; Cui, Lei; Zhou, Bing^*

来源：Colloids and Surfaces A: Physicochemical and Engineering Aspects , 2016, 498: 98-105.

DOI：10.1016/j.colsurfa.2016.03.038

• TiO2
• CaCO3
• Deposition
• Contrast ratio
• Interior emulsion coatings

In this paper, rutile TiO2@CaCO3 composites were in-situ synthesized by disaggregation and deposition of commercial TiO2 in alkaline Ca(OH)(2) slurry via a convenient and easy industrialized carbonation method. Field emission scanning electron microscopy and X-ray diffraction were applied to characterize the surface morphology and crystalline phases of the TiO2@CaCO3 composites, and the results showed that a coating layer of rutile TiO2 nanoparticles was formed on the surface of calcite CaCO3. As confirmed by the thermal gravimetric analysis and acid-resistance, the composites had better thermal stability and acid-resistance compared with CaCO3. The UV vis absorption spectra showed that rutile TiO2@CaCO3 composites possessed similar ultraviolet absorption capacity with TiO2. The contrast ratios of the coatings were high enough, and it remained 0.934 when rutile TiO2@CaCO3-15 completely substituted TiO2. Therefore, rutile TiO2@CaCO3 could partly substitute TiO2 applied as pigments in interior emulsion coatings.

• 出版日期2016-6-5
• 单位吉林大学