ABSTRACT

Modified multi-walled carbon nanotubes (MWCNTs) were prepared from commercially purchased MWCNTs with different chemical reactions. Nanocomposites were synthesised by the solvent casting method. The effects of functional groups, filling ratios and surfactants on thermal properties of nanocomposites were investigated. The structural, thermal and morphological properties of MWCNT and nanocomposites were investigated using Fourier transform infrared spectrophotometer, Brunauer–Emmett–Teller surface area measuring device, thermogravimetric analysis, differential scanning calorimetry and scanning electron microscopy. The novel increases in the thermal properties of poly(butylmethacrylate) (PBMA) were observed by adding MWCNT samples into a PBMA matrix. T_g values of nanocomposites were higher than those of PBMA films. The data obtained from the thermograms of nanocomposites at different heating rates were analysed with Kissinger, FWO and Friedman equations. The activation energies of the nanocomposites were higher than those of PBMA films.

摘要

改性多壁碳纳米管 (MWCNT) 是由商业购买的具有不同化学反应的 MWCNT 制备的。采用溶剂浇铸法合成纳米复合材料。研究了官能团、填充率和表面活性剂对纳米复合材料热性能的影响。使用傅立叶变换红外分光光度计、Brunauer-Emmett-Teller 表面积测量装置、热重分析、差示扫描量热法和扫描电子显微镜研究了 MWCNT 和纳米复合材料的结构、热和形态特性。通过将 MWCNT 样品添加到 PBMA 基质中，观察到聚（甲基丙烯酸丁酯）（PBMA）热性能的新增加。温度_{_}纳米复合材料的值高于 PBMA 薄膜。使用 Kissinger、FWO 和 Friedman 方程分析了在不同加热速率下从纳米复合材料的热分析图中获得的数据。纳米复合材料的活化能高于 PBMA 薄膜。