固化劑對多壁奈米碳管強化環氧樹脂斷裂韌度的效應

Effects of Hardener on the Fracture Toughness of MWCNT/Epoxy Composites

黃名懋(Ming-Mao Huang)

指導教授 ： 余念一

元智大學/工程學院/機械工程學系/碩士(2008年)

https://doi.org/10.6838/YZU.2008.00100

摘要

奈米碳管具有優秀的機械性質如剛度與強度，因此被當作複合材料中理想的加強材料。本研究選擇環氧樹脂添加多壁奈米碳管之複合材料進行此複合材料之破壞韌性實驗。並比較加入不同重量百分比的多壁奈米碳管和不同硬化劑對於環氧樹脂破壞韌性之影響。

破壞韌度是依據ASTM D5045之規範求得。使用固化劑D.E.H. 26所得到的多壁奈米碳管強化複合材料和平均破壞韌度為0.56 MPa．m1/2的純環氧樹脂相比，1wt%-，3wt%-和 5wt%-多壁奈米碳管複合材料平均破壞韌度分別增加了39.3%，67.9%，和85.7%。和加入固化劑HN-050的多壁奈米碳管複合材料相比，純環氧樹脂，1wt%-， 3wt%-和5wt%-多壁奈米碳管複合材料的平均破壞韌度分別增加24.4%，34.5%，33.3%和35.1%。實驗所得結果推定，添加不同固化劑的確會影響到多壁奈米碳管複合材料之破壞韌度。

關鍵字

奈米碳管 環氧樹脂 複合材料 破壞韌度 硬化劑

並列摘要

Carbon nanotubes (CNTs) exhibit excellent mechanical properties, such as stiffness and strength, and are considered as an ideal candidate for the reinforcement in composites. In the present work, multi-walled carbon nanotubes (MWCNTs) are used as reinforcements in epoxy to form MWCNT/epoxy composites and the effects of hardener and CNT weight fraction on the fracture toughness of MWCNTs/epoxy are quantitatively characterized.

The fracture toughness of MWCNT/epoxy specimens is experimentally determined in accordance with the American Standard Test Method (ASTM) D5045-99 Standard Test Methods for Plane-Strain Fracture Toughness and Strain Energy Release Rate of Plastic Materials. Hardener D.E.H.26 is used in composite specimen preparation. The percentage increase in average fracture toughness of 1 wt%-, 3 wt%- and 5 wt%-MWCNT/epoxy composites is 39.3%, 67.9% and 85.7%, respectively, higher than that of neat epoxy, which is 0.56 MPa．m1/2.

Compared with the MWCNT/epoxy composites prepared with the aid of hardener HN-050, the average fracture toughness of neat epoxy, 1 wt%-, 3 wt%- and 5 wt%-MWCNT/epoxy composites increases 24.4%, 34.5%, 33.3% and 35.1%, respectively. Our conclusion is that adding different hardener into MWCNT/epoxy composites indeed affects the fracture toughness of MWCNT/epoxy composites significantly.

並列關鍵字

nanotube epoxy composite fracture toughness hardener

參考文獻

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