Reinforcement effect of nanodiamond on properties of epoxy matrix

2013 International Conference on Aerospace Science & Engineering (ICASE) Pub Date : 2013-06-01 DOI:10.1002/PC.22480

S. A. Rakha, A. A. Khurram, T. Subhani, N. Ali, A. Munir

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引用次数: 33

Abstract

Epoxy/nanocrystalline diamond nanocomposites composites were prepared by dispersing ultrasonically, 0.4, 0.7, 1.0, and 4.0 wt. % acid treated nanocrystalline diamond (NCD) powder in epoxy matrix. Fourier infrared spectroscopy was utilized to study the moieties attached to the nanodiamond particles. The trace elements present in NCD powder before and after acid treatment were analyzed using ion beam techniques. Thermo-mechanical properties of the nanocomposites showed that incorporation of low content (0.4 wt. %) of nanodiamond powder into epoxy matrix enhanced the storage modulus, loss modulus and hardness by ~68%, ~55% and ~86% respectively over neat epoxy. By increasing the concentration of modified NCD to 0.7 wt. % resulted in lower values of hardness and thermo-mechanical properties but still remain higher than neat epoxy. An increasing trend in properties was again observed at 4 wt. % concentration of modified nanofiller. The improvement in storage modulus, loss modulus and hardness was ~57%, 105% and 70% respectively. The glass transition temperature was up shifted to ~110°C over neat epoxy. The mechanisms responsible for enhanced properties of epoxy matrix are also discussed in detail.

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纳米金刚石对环氧基材料性能的增强作用

将0.4、0.7、1.0、4.0 wt. %的酸处理纳米金刚石(NCD)粉末在环氧基中超声分散制备了环氧/纳米金刚石复合材料。利用傅里叶红外光谱研究了纳米金刚石颗粒上的附着基团。采用离子束技术对酸处理前后NCD粉末中的微量元素进行了分析。纳米复合材料的热力学性能表明，加入低含量(0.4 wt. %)纳米金刚石粉末后，其存储模量、损耗模量和硬度分别比纯环氧树脂提高了68%、55%和86%。将改性NCD的浓度提高到0.7 wt. %，硬度和热机械性能值降低，但仍高于纯环氧树脂。在改性纳米填料浓度为4 wt. %时，性能再次出现增加趋势。存储模量、损耗模量和硬度分别提高了~57%、105%和70%。在纯环氧树脂上，玻璃化转变温度提高到~110℃。并详细讨论了环氧树脂基体性能增强的机理。

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2013 International Conference on Aerospace Science & Engineering (ICASE)

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