聚羧酸钠盐分散剂分散超细重质碳酸钙的探讨  

Dispersal of Ultra-fine Ground Calcium Carbonate with Poly-Carboxylic Salt Dispersant

作　　者：张勇[1] 杨洁[1] 王晓钧[1] 陆鸣晔[1] 于波[1] 

机构地区：[1]南京工业大学材料科学与工程学院,南京210009

出　　处：《非金属矿》2005年第6期5-7,共3页Non-Metallic Mines

摘　　要：讨论了聚羧酸钠盐分散剂加入量对超细重钙在水中分散效果的影响。指出它比低分子量的分散剂具有长效分散能力,当它加入量为超细重钙质量的0.2%时,超细重钙在水中的分散性最好。此时,超细重钙的粒子粒径D50为3.2μm,粒子表面Zeta电位为-72.2mV,浆料的黏度为2.2mPa.s。试验中,首次采用核磁共振技术,表征出分散剂已吸附在超细重钙粒子表面。The influences of the quantity of poly-carboxylic salt dispersant on dispersal of GCC in water are studied.The results show that poly-carboxylic salt dispersant has the long-effect dispersal ability more than the dispersant of low molecular weight. When the dispersant with 0.2% quality content is used, the dispersal effect of GCC in water is the best. The medium particle size D50 of GCC is 3.2μm; Zeta potential is -72.2mV： and the slurry viscosity of GCC is 2.2mPa·s. For the first time, NMR is used to detect that poly-carboxylic salt dispersant is adsorbed on the GCC surface.

关 键 词：碳酸钙 分散剂 填料 NMR 

分 类 号：TQ132.32[化学工程—无机化工] TS195.55[轻工技术与工程—纺织化学与染整工程]