本研究是利用溶液ODCB–phenol(Ortho Dichlorobenzene–phenol)將聚對苯二甲酸乙二酯溶解,並且使多璧奈米碳管分散在ODCB–pheno溶液中。製備出聚對苯二甲酸乙二酯/多壁奈米碳管複合材料。之後將奈米碳管接枝羧酸基(-COOH)及胺基(-NH2),使奈米碳管能有效地和高分子產生鍵結,並使奈米碳管分散均勻(homogeneous)在高分子基材上。期望藉由奈米碳管優越的電性降低其表面電阻和導電度。實驗中使用不同的改質方法改質奈米碳管,將奈米碳管作為導電材料導入高分子中,製備出薄膜或纖維並提升此材料的耐用度、熱性質和機械性質,降低電阻和增加抗靜電的效果。 溶劑法中碳管含1.6 %時體積電阻達到3.4×106(Ω-cm)已符合electrostatic charge(ESC)criterion of thin films(1×108 Ω-cm)的標準,隨著碳管含量的增加,PET複材的導電度獲得提升,其中溶劑法的percolation concentration是1.0 %。
This research is to prepare nanocomposites of multi-wall carbon nanotubes (MWNT)and poly(ethylene terephthalate)(PET).ODCB–phenol mixture is one of the good solvent mixtures for PET. MWNT dispersed ODCB–phenol solution was successfully used to prepare PET/MWNT nanocomposites. To increase the chemical compatibility between PET and carbon nanotubes, carbon nanotubes were modified with mixed strong acid and amine. Unmodified andamine-modified multiwall carbon nanotubes(MWNT)were separately added to the PET to produce poly(ethylene terephthalate)/carbon nanotube composite. The dispersion of the MWNTs is expected to be improved greatly in the PET to enhance its durable , anti-static , thermal stability and mechanical properties. At 1.6 wt% of MWNT loading, the electrical resistance level(3.4×106 Ω-cm)of the composite exceeds electrostatic charge(ESC)criterion of thin films(1×108 Ω-cm).With increasing MWNT loading, the electrical conductivity of nanocomposites increase. The percolation threshold is 1.0 wt% in MWNT loading for electrical conductivity.