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以Ca(NO3)2·4H2O和Na2B4O7·10H2O为原料,水和乙醇为混合溶剂,在水热120℃条件下,可控制备了α-4CaO·5B2O3·7H2O纳米片以及由纳米片组装成的球形和蚕蛹状α-4CaO·5B2O3·7H2O纳米结构,通过X射线粉晶衍射(XRD)、X射线能谱分析(EDS)、红外光谱(FT-IR)和扫描电子显微镜(SEM)等手段对产物进行了表征.考察了反应温度、反应时间、溶剂及表面活性剂等条件对硼酸钙α-4CaO·5B2O3·7H2O形貌及尺寸的影响,提出了α-4CaO·5B2O3·7H2O纳米结构的可能形成机理.通过热分析法研究了三种不同形貌硼酸钙α-4CaO·5B2O3·7H2O样品的阻燃性能,结果表明其阻燃性能比非纳米样品好.
Using Ca (NO3) 2.4H2O and Na2B4O7 · 10H2O as raw materials and water and ethanol as mixed solvents, α-4CaO · 5B2O3 · 7H2O nanosheets can be prepared under hydrothermal conditions at 120 ℃, Spherical and silkworm pupal α-4CaO · 5B2O3 · 7H2O nanostructures were characterized by X-ray powder diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), infrared spectroscopy (FT-IR) and scanning electron microscopy The effects of reaction conditions such as reaction temperature, reaction time, solvent and surfactant on the morphology and size of α-4CaO · 5B2O3 · 7H2O borate were investigated, and the possibility of α-4CaO · 5B2O3 · 7H2O nanostructures was proposed Formation mechanism.The flame retardancy of three samples with different morphologies of calcium borate α-4CaO · 5B2O3 · 7H2O has been studied by means of thermal analysis. The results show that the flame retardant properties are better than those of non-nano samples.