PROPERTIES OF COMPOSITE POWDER BY SURFACE MODIFICATION OF CORE INORGANIC PIGMENTS WITH TITANIUM DIOXIDE
Dry impact-blending method was used to prepare functional composite-pigments using inorganic materials such as ground calcium carbonate(GCC),clay,and talc as core particles,and titanium dioxide as surface modifying fine particles.Core powder and fine powder were mixed at suitable ratios to form ordered mixtures,and in this course the energy caused by fine powder adhering to core particles was measured and utilized in examining the efficiency of particle surface modification.Then the mixtures were subjected to be composited by impact and friction forces resulting from very high-speed air circulation.The surface modified pigments were dispersed in water,and their electro-kinetic properties such as charge demand and Zeta potential were measured.The difference between simple mixing and composite modification on brightness and scattering index were also compared.All the results revealed that significant improvements of powder properties can be achieved through the surface modification method.
Jun-Hyung Cho Yong-Won Lee Lijun Wang
Department of Paper Science & Engineering,Kangwon National University,Chunchon-si,200701,Korea Department of Paper Science & Engineering,Kangwon National University,Chunchon-si,200701,Korea;Hanku Key Laboratory of Recycling and Eco-treatment of Waste Biomass of Zhejiang Province,Zhejiang Univers
国际会议
第五届制浆造纸新技术国际研讨会(ISETPP)暨第三届国际造纸与环境学术大会(IPEC)
广州
英文
1-6
2016-11-07（万方平台首次上网日期，不代表论文的发表时间）