Preparation of Composite Ground Calcium Carbonate in Ca(OH)2–H2O–CO2 System and Characterization

Chao Huo; Jia Yuan Shen; Qing Hua Xia

doi:10.4028/www.scientific.net/AMR.287-290.548

Paper Titles

Synthesis of BaCO₃ Nanostructures with Different Morphologies in Water/Room-Temperature Ionic Liquids Mixed Solvents
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Stabilization Effect of Sodium Phosphate on Hemihydrate Calcium Sulfate Whiskers
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X-Ray Photoelectron Spectroscopy Study on Reduction of Graphene Oxide with Hydrazine Hydrate
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Static Design Based on Hierarchy Optimization Associating Materials and Structures
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Preparation of Composite Ground Calcium Carbonate in Ca(OH)₂–H₂O–CO₂ System and Characterization
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Hydrogen Storage Property of Ti₄₅Zr₃₅Ni₁₇Cu₃ Quasicrystal Powder
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Optimization of Typical Grinding Model and the Simulation of Grinding Process Numerical
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Electro-Generation of Furfural Alcohol in Ni-P-MCMC/mCS Bipolar Membrane Equipped Electrolysis Cell
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Hydrothermal Synthesis and Characterization of Ca-Mg-Al Hydrotacite-Like Compounds
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Preparation of Composite Ground Calcium Carbonate in Ca(OH)₂–H₂O–CO₂ System and Characterization

Abstract:

Ground calcium carbonate (GCC) is usually of smooth/flat surface and pointed edges angles which have disadvantageous effects on the mechanical properties of composite polymer materials filled with the powder. Nanometer calcium carbonate reactants would deposit, nucleate and grow on surface of ground calcium carbonate with micron grain size by adjusting suitable technical parameters in Ca(OH)₂–H₂O–CO₂ system. Compared with the uncoated powder, composite ground calcium carbonate (CGCC) is of rough surface, blunt edges, larger specific surface area, larger in whiteness. In this paper, we reported the successful preparation of CGCC particles, and found GCC/Ca(OH)₂ weight ratio was the key parameter. Some technological parameters were mainly analyzed for the coating process. Furthermore, We also prepared nanosized calcium carbonate coating GCC at higher temperature (40 °C) using additives. Filling tests showed that a rough surface of the CGCC enhanced contact opportunities and improved the interface between polymer and CGCC blended with polypropylene (PP).