以熔融法製備聚對苯二甲酸乙二酯(PET)/多壁奈米碳管複合材料之性質研究

Preparation and Characterization of Poly(ethylene terephthalate)/Multi-wall Carbon nanotubes Composites by Melt-Blending

曾志雄(Chih-Hsiung Tseng)

指導教授 ： 程耀毅

國立臺北科技大學/工程學院/有機高分子研究所/碩士(2008年)

https://doi.org/10.6841/NTUT.2008.00050

摘要

本研究係針對高分子材料PET，期望藉由奈米碳管優越的電性降低其表面電阻並增加導電度，主要是利用奈米碳管作為導電材料導入高分子中，藉以降低PET的電阻和增加其抗靜電的能力，期望達到electrostatic charge (ESC) criterion of thin films (1×108 Ω-cm ) 的標準。本實驗為了能符合工業上的製程，採用了熔融法來製備不同比例的PET-奈米碳管複合材料，並探討奈米碳管對PET性質的影響，以及找出其滲透濃度(percolation concentration)。
在此研究中將分成添加未改質奈米碳管和改質奈米碳管二個部份來探討。本實驗利用傅立葉轉換紅外光譜儀（FTIR）及雷曼光譜儀(Raman)來鑑定碳管化學結構，熱重損失分析儀（TGA）探討複材的熱穩定性質，動態機械分析儀(DMA)及皮膜鉛筆硬度計(Hardness pencil test)來測定複材的機械性質及硬度，超絕緣儀(super megohmmeter)測複材的導電性，以及以穿透式電子顯微鏡(TEM)觀察複材的剖面型態及分散性。
改質碳管的部份由FTIR及Raman的結果可知碳管改質是成功的；複材方面，PET-未改質奈米碳管複材於TGA熱分析的結果顯示PET的熱穩定性是隨著碳管比例的提升而提升，其中以3wt%的效果最好，而複材導電性由結果顯示亦是隨著碳管比例的提升而提升，其中碳管含量在1.8wt%時達到滲透濃度(percolation concentration)，並於2wt%時達到了抗靜電1×108 Ω-cm的標準。

關鍵字

聚對苯二甲酸乙二酯 ； 多壁奈米碳管 ； 奈米複合材料

並列摘要

In this research, we expect to increase conductivity of PET by adding carbon nanotubes of excellent electrical properties. We mainly utilize the carbon nanotubes to reduce resistivity and antistatic ability of PET to reach electrostatic charge (ESC) criterion of thin films (1×108 Ω-cm ). This experiment is to prepare PET-carbon nanotubes composites with different percentage by melt-blending, to study the effect of carbon nanotubes on PET, and to find out percolation concentration. In this study, the effect of unmodified MWNTs or modified MWNTs on PET were also discussed. The structure of modified MWNTs was characterized by Fourier transform infrared spectrometer and Raman spectrometer. The thermal properties of PET-MWNTs nanocomposite were analyzed by Thermogravimetric analysis (TGA). The mechanical properties and hardness of PET-MWNTs nanocomposites were test by DMA and Hardness Pencil test. The electrical conductivity properties of PET-MWNTs nanocomposite were obtained by Super Megohmmeter. The morphology and dispersion of PET-MWNTs nanocomposite was observed by Transmission electron microscopy(TEM).
We can conclude that MWNTs was modified successfully from FTIR and Raman observations. The TGA results indicate that the thermal stability of PET-unmodified MWNTs nanocomposite will be increased by adding MWNTs from 1.6wt% to 3.0%. The electrical conductivity property of PET-unmodified MWNTs nanocomposite will be increased by adding MWNTs too. The percolation concentration of PET-unmodified MWNTs nanocomposite is 1.8wt%. The electrostatic charge (ESC) criterion of thin films is achieved when MWNTs was added about 2wt%.

並列關鍵字

Poly(ethylene terephthalate) ； Multi-wall carbon nanotubes ； Nanocomposite

參考文獻

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