超细种分氢氧化铝微粉的表面改性  

Surface Modification for Fine Aluminum Hydroxide Precipitated from Sodium Aluminate Solution

作　　者：刘念兹 罗莎[2] 李云峰[3] Liu Nianzi Luo Sha Li Yunfeng(Hunan Dizhi Middle School, Changsha 410011 College of Chemistry and Chemical Engineering, Central South University, Changsha 410083 School of Metallurgy and Environment, Central South University, Changsha 410083, China)

机构地区：[1]湖南省地质中学,湖南长沙410011 [2]中南大学化学化工学院,湖南长沙410083 [3]中南大学冶金与环境学院,湖南长沙410083

出　　处：《广东化工》2016年第21期74-75,71,共3页Guangdong Chemical Industry

摘　　要：结合工厂铝酸钠溶液种分制备超细氢氧化铝粉工艺,研究了表面改性温度、改性方式、表面改性剂的复配等对表面改性产品活化指数、吸油值、电导率的影响规律。结果表明,在小于130℃内提高表面改性温度、强化表面改性搅拌强度和采用表面改性剂的复配,均有利于提高氢氧化铝微粉表面改性效果;而太高温度(>130℃)会降低表面改性效果。表面改性效果主要取决于表面改性剂官能团性质。与硬脂酸复配还能降低产品的电导率,减少硅烷偶联剂用量。改性氢氧化铝的吸油值和活化指数变化规律不完全一致。Effects of temperature, method, and modifier on active value, oil adsorption electric conductivity was studied based on the seeded precipitation for preparation of the fine aluminum hydroxide. Results show that elevating temperature, increasing agitation speed or mixing modifier benefits the surface modification. However, temperature more than 130 ℃ is detrimental to the surface modification. Moreover, surface modification depends on functional group of modifier. Mixing with stearic acid reduces electric conductivity for modified aluminum hydroxide and saves silane coupling agent, Results also indicate that oil adsorption varies inconsistently with active value in the surface modification.

关 键 词：氢氧化铝 表面改性 活化指数 吸油值 

分 类 号：TQ132.32[化学工程—无机化工]