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Study on Preparation and Properties of Polymer Ceramic Dispersant

Author: LiHuiRu
Tutor: SunXiaoRan
School: Hebei University of Technology
Course: Chemical processes
Keywords: Polymer dispersing agent Hydroxyethyl cellulose Graft copolymerization Ceramics Kaolin
CLC: TQ174.4
Type: Master's thesis
Year: 2009
Downloads: 149
Quote: 1
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Abstract


In the the ceramic industrial production process , in order to improve the ceramic product quality and production efficiency , often adding a dispersant in the slurry in order to improve the performance of the mud . The polymer dispersant performance attention has been paid , which mainly use the steric hindrance and electrostatic effects played a dispersion mud . According to the mechanism of action and structural design principle of the polymer dispersing agent , hydroxyethyl cellulose, cationic monomer dimethyl diallyl ammonium chloride, and an anionic monomer acrylic acid as the graft - copolymerizable monomer , a synthetic zwitterionic , cationic and the three anionic polymer grafted dispersant. Factor level and orthogonal experiment to determine the optimum conditions for the three dispersant , the structure was characterized by IR , DTA-TG thermal analysis of the three polymers . Respectively three dispersant added amount and pH value of the ceramic kaolin dispersion performance , and the dispersion of the particles was observed using SEM . Its application to purple knag clay , investigated three dispersant its slurry dispersion and the green body plasticity and flexural impact , and with the commonly used industrial inorganic dispersant ( sodium silicate , sodium carbonate and mixtures thereof ) to compare. The results show that the zwitterionic dispersant amount of 0.2% , the efflux time of the slurry 46s, and 38.7% with respect to the decrease in the efflux time of adding an inorganic dispersant , the degree of thickness of 1.2 % . Body plasticity of 0.247% , the flexural strength to 16MPa . Cationic dispersant amount of 0.4% , the outflow time of 57s, and 24 % with respect to the decrease in the efflux time of adding an inorganic dispersant , a degree of thickness is 1.25 . The plasticity 0.233 flexural strength 14.36MPa . Anionic dispersant amount of 0.05% slurry outflow time of 33.6s, 55.2 % with respect to the decrease in the efflux time of adding an inorganic dispersant . The plasticity 0.343 flexural strength 40.88MPa . By contrast shows the three types of polymer dispersing agent to improve the fluidity of the slurry , the plasticity of the green body , and flexural strength properties were superior to the the inorganic dispersant sodium silicate and sodium carbonate . Among them, the best overall performance of the anionic dispersing agent , and the synthesis process simple preparation process without the \

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CLC: > Industrial Technology > Chemical Industry > Silicate > Ceramic Industry > Raw materials and auxiliary materials
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