Microstructure and Ablation Performance of CNT-phenolic Nanocomposites

Abstract

Highly ablation resistant carbon nanotube (CNT)-phenolic composites were fabricated by the addition of low concentrations of CNT nanofiller. Tensile and compressive properties as well as ablative resistance were significantly improved by the addition of only 0.1 and 0.3 wt% of uniformly dispersed CNTs. An oxygen-keroseneflame torch and a field emission scanning electron microscope (FE-SEM) were used to evaluate the ablative properties and microstructures of these CNT-phenolic composites. Thermal gravimetric analysis (TGA) revealed that the ablation rate was lower for the 0.3 wt% CNT-phenolic composites than for neat phenolic or the composite with 0.1 wt% CNT. Ablative mechanisms for all three materials were investigated using this TGA in conjunction with microstructural studies using a FE-SEM. The microstructural studies revealed that CNT acted as an ablation resistant phase at high temperatures, and that the uniformity of dispersion of the CNT played an important role in this resistance to ablation.

Carbon Nano Tube Dispersion Evaluation in B-stage Resin Films

“…특히 하 이브리드카와 전기자동차와 같은 미래형 자동차의 경우 추 가 장치 장착에 따른 무게증가를 보상하기 위해 기존 차체 에 사용되고 있는 철강소재를 대체하여 고강도 강, 마그네 슘합금, 알루미늄합금, 섬유강화플라스틱 소재를 사용하고 있다 [1]. 섬유강화 복합재료는 타소재에 비하여 여러 이점 이 있어 우주항공, 스포츠 분야를 넘어 건축 및 자동차 산 업에도 그 활용범위가 확대되고 있다 [2]. 후 기…”

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