【摘要】 为了解决超细硫酸钡产品与有机物相容性差、耐热性能不佳及进一步降低反应能耗等问题,用棕榈酸钠、棕榈酸钠/硬脂酸钠作表面改性剂,对超细硫酸钡进行湿法表面改性,以活化度为判定改性效果的主要指标。采用激光粒度仪、傅里叶红外光谱仪(FT-IR)、白度仪、全自动接触角测量仪等对改性产品的性能进行表征。结果表明,采用棕榈酸钠改性后产品的活化度为99.90%,且改性的反应温度降低为60℃,降低了能耗;采用棕榈酸钠/硬脂酸钠复合改性剂改性后产品的活化度为99.89%,且产品的耐热性能得到了明显的提高。更多还原

【Abstract】 In order to solve the problem of poor compatibility and poor heat resistance of ultrafine barium sulfate products,and further reduce the reaction energy consumption,wet surface modification of ultra-fine barium sulfate is performed by using sodium palmitate / sodium stearate as the surface modifiers. The degree of activation is considered as the main indicator to study the effect of surface modification. The properties of modified products are characterized by laser particle sizer,Fourier transform infrared spectroscopy( FT-IR),whiteness meter and automatic contact angle measuring instrument. The results show that the activation degree of the products modified by sodium palmitate is99. 90%. The reaction temperature is decreased to 60℃,reducing the energy consumption. When the surface modifier is palm sodium / sodium stearate,the degree of activation of the product is 99. 89% and the heat resistance of the product is also significantly improved.更多还原