製備與鑑定酯型聚胺酯/改質奈米碳管複合材料

Synthesis and Characterization of Ester-Typed Polyurethane/Modified Carbon-Nanotube Composites

陳奕村(Yi-Tsuen Chen)

指導教授 ： 王賢達

國立臺北科技大學/工程學院/有機高分子研究所/碩士(2008年)

摘要

本研究製備含有兩種不同官能基的多壁奈米碳管(multi-walled carbon nanotubes(MWNTs))：羧基化碳管(AMWNTs)與丁二醇化碳管(BDMWNTs)。隨後取不同比例(0.5、1、2、3、5wt%)上述改質碳管加入酯型聚胺酯先導物(聚己內酯二醇(polycaprolactone diol)與二苯甲烷二異氰酸鹽(MDI)所合成)，再以丁二醇鏈延長後得到聚胺酯/羧基化碳管複合材料(APU)與聚胺酯/丁二醇化碳管複合材料(BDPU)。
AMWNTs和BDMWNTs分別以FTIR、NMR和EDS鑑定其結構。FTIR光譜顯示AMWNTs之-COOH官能基和BDMWNTs之-(C=O)O(CH2)4OH之鍵結。NMR光譜也顯示-(C=O)O(CH2)4OH不同質子之共振信號。EDS光譜顯示AMWNTs含C和O元素。
GPC數據顯示，APU和BDPU數量平均分子量(Mw)會隨著AMWNTs或BDMWNTs加入而降低，添加量越多，Mw下降越多。TEM影像顯示，純化後的奈米碳管容易團聚在聚胺酯(PU)基材中，長度也較長，BDMWNTs則均勻的分佈於BDPU中。熱性質方面，DSC數據顯示，APU和BDPU的玻璃轉移溫度(Tg)都比PU的來得低，其中以加入3%BDMWNTs的3BDPU其Tg最低。TGA數據顯示，5BDPU的5%熱裂解溫度最多可以比PU的上升18℃左右。
APU和BDPU的斷裂拉伸強度和拉伸模數會隨AMWNTs或BDMWNTs的添加而上升，但斷裂伸長反而下降，數據顯示BDPU的上述性質又比APU上升或下降幅度大。APU和BDPU的表面電阻和透濕性數據顯示，隨AMWNTs或BDMWNTs添加，表面電阻和透濕性皆下降。5BDPU表面電阻相對於PU的下降四個級數左右。5BDPU的透濕性大概只有PU的三分之一。

關鍵字

聚胺酯 ； 奈米碳管 ； 複合材料

並列摘要

The multi-walled carbon nanotubes were purified, and modified with butandiol. The product(BDMWNTs) was characterized by infrared, nuclear magnetic resonance and energy dispersive spectroscopy methods. The existence of hydroxybutane groups in BDMWNTs were identified in above spectra.
BDMWNTs were incorporated into prepolymers which were prepared using poly(caprolactone)diol and methylene bis(p-phenylene isocyanate), and chain-exteneded by butandiol to produce ester-typed polyurethane composites(BDPU).
BDMWNTs were well-dispersed in BDPU according to images taken from transmission electron microscope. Number average molecular weight, glass transition temperature, surface electric resistivity, water vapor transmission rate and breaking tensile extension of BDPU decreased upon increasing BDMWNTs loading. However, 5% decomposition temperature, breaking tensile strength and tensile modulus of BDPU were vice versa.

並列關鍵字

polyurethane ； multi-walled carbon nanotube ； composite

參考文獻

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