硬硼钙石的湿法改性及表征  

Wet modification and characterization of colemanite

作　　者：吉丽[1] 仲剑初[1] 王洪志[1] 

机构地区：[1]大连理工大学化工学院材料化工系,辽宁大连116024

出　　处：《无机盐工业》2013年第11期25-28,共4页Inorganic Chemicals Industry

摘　　要：分别以硬脂酸和油酸为改性剂,无水乙醇为溶剂,采用湿化学法对硬硼钙石进行表面改性。考察了改性温度、改性时间、液固比及改性剂用量等因素对硬硼钙石改性效果的影响。采用红外光谱、XRD、热重分析、SEM等手段对改性前后的硬硼钙石进行分析表征。研究结果表明:在硬脂酸用量为5%(质量分数)、改性时间为75 min、改性温度为75℃、液固比(mL/g)为2∶1的条件下,改性产物性能最佳,活化指数达到99.45%;在油酸用量为5%(质量分数)、改性时间为50 min、改性温度为60℃、液固比(mL/g)为1∶1的条件下,改性硬硼钙石的活化指数达到68.30%。Colemanite surface was modified by wet chemical process with stearic acid and oleic acid as modifiers respectively and with anhydrous ethanol as solvent.The influences of temperature, time, liquid-solid ratio, and dosage of modifier etc. on the modification effect of colemanite were investigated.Unmodified and modified eolemanites were characterized by the means of FT-IR, XRD, TG-DTG, and SEM etc..The results demonstrated that the modified colemanite had the optimal performance and its activation index was 99.45%, when colemanite was modified by addition of 5% （mass fraction） stearic acid at 75 ~C for 75 min with liquid to solid ratio of 2：1 （mL/g） ;while the activation index of colemanite modified by 5%（mass fraction） oleic acid at 60 ~C for 50 min with liquid to solid ratio of 1：1 （mL/g） was 68.30%.

关 键 词：硬脂酸 油酸 硬硼钙石 表面改性 

分 类 号：TQ128.54[化学工程—无机化工]