Mechanical Grinding Preparation and Characterization of TiO2-Coated Wollastonite Composite Pigments
Abstract
:1. Introduction
2. Materials and Methods
2.1. Raw Materials and Reagents
2.2. Preparation Method
2.3. Characterization
3. Results and Discussion
3.1. The Property and Microstructure of TiO2-Coated Wollastonite Composite Pigments
3.1.1. The Pigment Properties and Comparison of TiO2-Coated Wollastonite Composite Pigments
3.1.2. The Morphology of TiO2-Coated Wollastonite Composite Pigments
3.2. The Essence of Combination Reaction between Wollastonite and TiO2 Particles
3.2.1. Crystal Structure Analysis
3.2.2. The Reaction Characteristics between Wollastonite and TiO2 Particles
3.3. The Composite Model between Wollastonite and TiO2 Particles
3.3.1. The Surface Morphology of Wollastonite Particles
3.3.2. The Surface Morphology of TiO2 Particles
3.3.3. The Composite Model between Wollastonite and TiO2 Particles
4. Conclusions
- (1)
- TiO2-coated wollastonite composite pigments were successfully prepared by way of the mechano-chemical method. The composite pigment (contains 45% TiO2) has similar oil absorption to titanium dioxide. The hiding power is 17.97 g/m2, reaching 81.08% of titanium dioxide with an increase of 36.08% compared to the same amount of TiO2 used in composite particles.
- (2)
- A firm combination between wollastonite and TiO2 particles is formed through a dehydroxylation reaction, leading the composite materials to have the structure of TiO2 coating on the wollastonite surface evenly and closely. The wollastinite-TiO2 composite materials have similar properties to titanium dioxide.
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Samples | Oil Absorption/(g/100 g) | Whiteness/% | Hiding Power/(g/m2) | Relative Hiding Power (E)/% | ΔE(E − E0)/% |
---|---|---|---|---|---|
TiO2-coated wollastonite composite pigments | 22.72 | 96.6 | 17.97 | 81.08 | 36.08 |
Wollastonite and TiO2 dry mixtures | 19.70 | 96.0 | 23.04 | 63.24 | 18.24 |
Wollastonite and TiO2 wet mixtures | 20.12 | 96.3 | 21.56 | 67.58 | 22.58 |
Anatase TiO2 | 25.03 | 96.2 | 14.57 | 100 | - |
Wollastonite | 11.20 | 94.0 | 272.65 | - | - |
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Chen, W.; Liang, Y.; Hou, X.; Zhang, J.; Ding, H.; Sun, S.; Cao, H. Mechanical Grinding Preparation and Characterization of TiO2-Coated Wollastonite Composite Pigments. Materials 2018, 11, 593. https://doi.org/10.3390/ma11040593
Chen W, Liang Y, Hou X, Zhang J, Ding H, Sun S, Cao H. Mechanical Grinding Preparation and Characterization of TiO2-Coated Wollastonite Composite Pigments. Materials. 2018; 11(4):593. https://doi.org/10.3390/ma11040593
Chicago/Turabian StyleChen, Wanting, Yu Liang, Xifeng Hou, Jing Zhang, Hao Ding, Sijia Sun, and Hu Cao. 2018. "Mechanical Grinding Preparation and Characterization of TiO2-Coated Wollastonite Composite Pigments" Materials 11, no. 4: 593. https://doi.org/10.3390/ma11040593
APA StyleChen, W., Liang, Y., Hou, X., Zhang, J., Ding, H., Sun, S., & Cao, H. (2018). Mechanical Grinding Preparation and Characterization of TiO2-Coated Wollastonite Composite Pigments. Materials, 11(4), 593. https://doi.org/10.3390/ma11040593