MODIFICATION ON THE VISCOSITY PROPERTY OF KAOLIN CLAY WITH LOW TEMPERATURE PLASMA
The application of domestic kaolin clay in paper coating field was greatly limited by its high viscosity. Therefore, the research on its viscosity modification is of great importance. In this work, the size distribution of the kaolin clay particles was examined, in which most of particles belong to the narrow size range of 0.5～1.0 μm, which occupy a proportion of 56.4%, and the volume percentage of<0.5 μm is up to 32.2%. Both the excessive amount of ultrafine kaolin particles and poor-proportioned grain size distribution account for its too high viscosity property to be used as paper coating. The studied kaolin sample were exposed to cold plasma of air, and three variables influencing on the surface treatment, input power, vacuum degree, and discharge time were tested. The results showed that the cold plasma modification with proper process parameters allowed a real decrease in the clay viscosity. The aggregation state of the clays was changed, a better dispersion of kaolin particles in dispersant was achieved after air plasma treatment.
kaolin viscosity low temperature plasma paper coating modification
Zhao Lihong He Beihai Li Junrong
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
国际会议
广州
英文
981-985
2006-11-08（万方平台首次上网日期，不代表论文的发表时间）