硫酸钙晶须溶解抑制改性及其性能表征  

Dissolution-inhabiting Modification of Calcium Sulfate Whisker and Its Characterization

作　　者：王玉珑[1,2] 覃盛涛[1] 詹怀宇[2] 刘艳新[1] 

机构地区：[1]长沙理工大学化学与生物工程学院,湖南长沙410114 [2]华南理工大学制浆造纸国家重点实验室,广东广州510640

出　　处：《非金属矿》2013年第1期42-45,共4页Non-Metallic Mines

基　　金：中国博士后基金(20110490891);湖南省教育厅优秀青年基金(11B006)

摘　　要：针对硫酸钙晶须作为造纸填料加填纸张时存在溶解度高、留着率低的问题,对硫酸钙晶须的性能进行分析,利用有机改性对硫酸钙晶须进行溶解抑制,主要探究了改性剂种类及用量、温度、时间、搅拌速度对硫酸钙晶须溶解度的影响,并对最佳工艺产品性能进行表征。结果表明,硬脂酸有机改性对晶须溶解抑制效果最好,硬脂酸适宜用量为2%,改性温度为90℃、反应时间30min、搅拌速度400r/min时,硫酸钙晶须在水中的电导率下降了48.4%;扫描电镜结果显示,改性后晶须尺寸变小,呈细小针状;红外光谱显示,硬脂酸分子键合到晶须表面。In order to solve the high solubility and low retention problems used as paper filler, calcium sulfate was characterized and modified by dissolution-inhabiting. The influence factors, such as type and dosage dissolution-inhabiting additive, temperature, time and stirring rate were investigated. The results showed that stearic acid treatment can obviously decrease solubility of calcium sulfate, its optimum treatment conditions are as follows： dosage is 2%, temperature is 90 ℃, reaction time is 30 min, stirring rate is 400 r/min. After this treatment, the conductivity of calcium sulfate can decrease by 48.4%. The SEM results show that size of modified calcium sulfate obviously decrease and the FTIR shows that stearic acid molecular is bound with calcium sulfate surface very well.

关 键 词：硫酸钙晶须 溶解抑制 电导率 造纸填料 

分 类 号：TS727.6[轻工技术与工程—制浆造纸工程]