【摘要】 以从漆蜡中提取的棕榈酸为改性剂,对方解石型碳酸钙粉体进行改性处理。以浊度、沉降体积作为评价指标,考察了改性温度、料浆质量分数、棕榈酸用量、改性时间及搅拌转速等对样品分散性能的影响。用傅立叶变换红外吸收光谱、热重分析、粒度分析等对改性前后碳酸钙粉体进行了表征。结果表明,在棕榈酸用量为2.0%,碳酸钙料浆质量分数为25.0%,改性温度为90℃,改性时间为120 min,搅拌速率为1200 r/min的条件下能得到粒度分布均匀、分散性好的碳酸钙粉体。更多还原

【Abstract】 The calcite-type ground calcium carbonate was modified by using palmitic acid as modification reagent,which was extracted from lacquer wax.The optimum modification condition was obtained by using the turbid degree and sedimentation volume as the main judgment criteria.The calcium carbonate samples was characterized by Fourier transform infrared spectrum(FTIR),thermogravimety analysis(TG) and size analysis.It was shown that the target product with uniform granularity distribution and better dispersivity could be obtained at the amount of palmitic 2.0 %,concentration of calcite-type ground calcium carbonate slurry 25.0%,modification temperature 90 ℃,modification time 120 min,and stirring speed 1200 r/min.更多还原