Lee Eunbi, Cho Chi Hyeong, Hwang Sae Hoon, Kim Min-Geun, Han Jeong Woo, Lee Hanmin, Lee Jun Hyup
Department of Chemical Engineering, Myongji University, Yongin, Gyeonggi 17058, Korea.
Korea Institute of Machinery and Materials, Daejeon 34103, Korea.
Materials (Basel). 2019 Sep 22;12(19):3092. doi: 10.3390/ma12193092.
A carbon fiber-reinforced polymer (CFRP) is a light and rigid composite applicable in various fields, such as in aviation and automobile industry. However, due to its low thermal conductivity, it does not dissipate heat sufficiently and thus accumulates heat stress. Here, we reported a facile and effective strategy to improve the through-thickness thermal conductivity of CFRP composites by using a layer-by-layer coating of inorganic crystals. They could provide efficient heat transfer pathways through layer-by-layer contact within the resulting composite material. The high thermally conductive CFRP composites were prepared by employing three types of inorganic crystal fillers composed of aluminum, magnesium, and copper on prepreg through the layer-by-layer coating process. The vertical thermal conductivity of pure CFRP was increased by up to 87% on using magnesium filler at a very low content of 0.01 wt %. It was also confirmed that the higher the thermal conductivity enhancement was, the better were the mechanical properties. Thus, we could demonstrate that the layer-by-layer inclusion of inorganic crystals can lead to improved through-thickness thermal conductivity and mechanical properties of composites, which might find applications in varied industrial fields.
碳纤维增强聚合物（CFRP）是一种轻质且刚性的复合材料，适用于航空和汽车工业等各个领域。然而，由于其低导热性，它不能充分散热，从而积累热应力。在此，我们报道了一种简便有效的策略，即通过无机晶体的逐层涂覆来提高CFRP复合材料的厚度方向热导率。它们可以通过在所得复合材料内的逐层接触提供有效的热传递途径。通过在预浸料上采用由铝、镁和铜组成的三种无机晶体填料，通过逐层涂覆工艺制备了高导热CFRP复合材料。在使用含量仅为0.01 wt%的镁填料时，纯CFRP的垂直热导率提高了高达87%。还证实了热导率增强越高，机械性能越好。因此，我们可以证明，无机晶体的逐层加入可以提高复合材料的厚度方向热导率和机械性能，这可能在各种工业领域中得到应用。
