无溶剂纳米CaCO_(3)流体的制备及其流变性能分析  

Preparation and characterization of solvent-free CaCO_(3) nanofluids and their rheology properties

作　　者：李韩飞 赵旭波 朱广凯 张俊 李晓亮 白星星 童张法[1] 廖丹葵[1] 李立硕[1] LI Hanfei;ZHAO Xubo;ZHU Guangkai;ZHANG Jun;LI Xiaoliang;BAI Xingxing;TONG Zhangfa;LIAO Dankui;LI Lishuo(School of College of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China;Shangsi Desheng New Materials Technology Co.Ltd.,Fangchenggang 538000,China)

机构地区：[1]广西大学化学化工学院,广西南宁530004 [2]上思德盛新材料科技有限公司,广西防城港538000

出　　处：《高校化学工程学报》2025年第1期141-148,共8页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金(52162004);上思德胜新材料科技有限公司项目(GJ20230603)。

摘　　要：为了解决纳米碳酸钙(CaCO_(3))在贮存和使用过程中易发生团聚的问题,改善其与聚合物材料共混的相容性,通过共价接枝的方法将长链有机物聚醚-硅烷(KHM)接枝到纳米CaCO_(3)表面,制备出新型的稳定无溶剂纳米流体(CaCO_(3)-KHM),并考察其流变学行为。结果表明,所制备的CaCO_(3)-KHM中的CaCO_(3)呈立方形,有机层均匀包覆在CaCO_(3)表面形成核壳结构,有机层厚度为4 nm左右;有机含量超过70%后,CaCO_(3)-KHM显示出类似液体的性质。差示扫描量热(DSC)分析表明,CaCO_(3)-KHM的玻璃化转变温度为-36℃,熔融温度为10℃。热分析发现该类流体具有良好的热稳定性,初始分解温度在260℃以上。乳液状无溶剂纳米CaCO_(3)流体能够实现无机纳米粒子与聚合物材料的“液-液”混合,对热固性树脂改性具有重要意义。In order to prevent the agglomeration of nano-CaCO_(3)during storage and usage,and improve its compatibility with polymer materials,a new stable solvent-free nano-like fluid(CaCO_(3)-KHM)was successfully prepared by grafting long-chain organics,polyether-silanes(KHMs)onto the surface of nano-CaCO_(3)with covalent grafting technology,and its rheology behaviors were investigated.The results show that CaCO_(3)in the prepared CaCO_(3)-KHM was cubic,and the organic layer was uniformly encapsulated on the surface of CaCO_(3)to form a core-shell structure,and the thickness of the organic layer was about 4 nm.the CaCO_(3)-KHM show liquid-like properties only after the organic content exceeding 70%.The glass transition temperature of CaCO_(3)-KHM was-36℃and the melting temperature was 10℃by DSC analysis.Thermal analysis reveals that this type of fluid has good thermal stability with an initial decomposition temperature above 260℃.The solvent-free CaCO_(3)nanofluids can realize the“liquid-liquid”mixing of inorganic nanoparticles and polymer materials,which is of great significance in the modification of thermosetting resins.

关 键 词：纳米CaCO_(3) 纳米类流体 流变性 聚醚胺 硅烷偶联剂 

分 类 号：TQ127.1[化学工程—无机化工]