无溶剂纳米 CaCO3 流体的制备及其流变性能分析
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关键词：纳米 CaCO3 ；纳米类流体；流变性；聚醚胺；硅烷偶联剂 中图分类号：TQ127.1 文献标志码：A DOI：10.3969/j.issn.1003-9015.2025.01.016
Abstract：In order to prevent the agglomeration of nano- CaCO3 during storage and usage，and improve its compatibility with polymer materials，a new stable solvent-free nano-like fluid （ CaCO3 -KHM） was successfully prepared by grafting long-chain organics，polyether-silanes（KHMs） onto the surface of nano- CaCO3 with covalent grafting technology，and its rheology behaviors were investigated.The results show that CaCO3 in the prepared CaCO 3 -KHM was cubic，and the organic layer was uniformly encapsulated on the surface of CaCO3 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 7O% .The glass transition temperature of CaCO3 -KHM was -36°C and the melting temperature was 10qC by DSC analysis.Thermal analysis reveals that this type of fluid has good thermal stability with an initial decomposition temperature above 2609C. The solvent-free CaCO3 nanofluids can realize the“liquid-liquid”mixing ofinorganic nanoparticlesandpolymer materials，which isof great significance inthemodificationof thermosetting resins.
Key words： Nano .cac03 ；solvent-free fluid；rheology；polyetheramine；silane coupling agent
1前言
碳酸钙（ CaCO3 ）由于其价格低廉、力学性能优异等优点，引起学术及工业界极大兴趣[1]。（剩余11964字）
