大分子偶联剂KH570-g-PLA改性绢云母的制备与表征  

Preparation and Characterization of Sericite Modified by Macromolecular Coupling Agent KH570-g-PLA

作　　者：张震[1] 胡应模[1,2] 庞宝宝 武莎莎 崔奎 郭素芳 ZHANG Zhen;HU Yingmo;PANG Baobao;WU Shasha;CUI Kui;GUO Sufang(School of Materials Science and Technology,China University of Geosciences(Beijing),Beijing 100083,China;Beijing Key Laboratory of Material Utilization of Nonmetallic Minerals and Solid Waste Resources,Beijing 100083,China;National Laboratory of Rock and Mineral Materials,Beijing 100083,China)

机构地区：[1]中国地质大学(北京)材料科学与工程学院,北京100083 [2]非金属矿物和固废资源材料化利用北京市重点实验室,北京100083 [3]岩石矿物材料国家专业实验室,北京100083

出　　处：《矿产保护与利用》2022年第4期45-50,共6页Conservation and Utilization of Mineral Resources

摘　　要：采用“一步法”复合改性工艺制备大分子偶联剂KH570-g-PLA改性绢云母,以改性前后绢云母的浊度和接触角为参数对绢云母表面改性工艺进行优化,考察了改性剂用量、反应时间和反应温度对绢云母表面改性效果的影响。试验结果表明,KH570-g-PLA改性绢云母的最佳工艺条件为聚乳酸(PLA)用量10%、反应温度110℃、反应时间4 h,此时其浊度为809 NTU,接触角为66°。相比未改性绢云母,浊度提高196%,接触角提高285%。测试分析表明,大分子偶联剂KH570-g-PLA被成功偶联到绢云母表面,KH570-g-PLA改性绢云母的晶体片径变小,团聚现象减弱,分散性和疏水性提高,结晶度降低,耐热温度约为705℃。The macromolecular coupling agent KH570-g-PLA modified sericite were prepared by one-step composite modification process. The effects on the sericite surface modification efficiency of modifier dosage, reaction time and reaction temperature were investigated with the parameters of turbidity, and contact angle of sericite before and after modification, and the optimizational surface modification conditions of sericite were obtained.The optimal technological conditions of KH570-g-PLA modified sericite were that the 10% of PLA was reacted with sericite at 110 ℃ for 4 h. The turbidity is 809 NTU and the contact Angle is 66°. Compared with unmodified sericite, its turbidity increased by 196%, and contact angle increased by 285%. The coupling agent KH570-G-PLA was successfully coupled to the surface of sericite. And the KH570-g-PLA modified sericite had a smaller crystal size, seldom agglomeration phenomenon, better dispersibility and hydrophobicity, lower crystallinity and the higher heat resistance temperature(about 705 ℃).

关 键 词：绢云母 聚乳酸 KH570 KH570-g-PLA 接枝共聚 偶联作用 

分 类 号：TD985[矿业工程—选矿]