The invention belongs to the technical field of materials for high-speed train bodies, and particularly relates to a carbon fiber sandwich composite material and a preparation method and application thereof. The carbon fiber sandwich composite material comprises an upper skin, a lower skin and a middle core material. The layer structure of each skin comprises multiple layers of carbon fiber plaincloth-(an electromagnetic shielding layer-multiple layers of carbon fiber plain cloth), wherein n is smaller than or equal to 10. The core material is a polyimide aerogel plate. According to the invention, the specific core material is selected to be matched with the skins formed by specific compounding, so the advantages of low density, good environmental adaptability and high electromagneticshielding performance are achieved under the condition of ensuring bonding force; in addition, the carbon fiber sandwich composite material has the advantages of low room-temperature heat conductivity, good mechanical properties, excellent heat stability, good in flame retardant property and the like, is an ideal material for replacing aluminum profiles for the high-speed rail bodies, and can further improve the speed and carrying capacity of a high-speed rail.

    本发明属于高速列车车体材料技术领域,具体涉及一种碳纤维夹芯复合材料及其制备方法与应用。所述碳纤维夹芯复合材料,包括:上下蒙皮及中间芯材;所述蒙皮的层结构包括:多层碳纤维平纹布‑(电磁屏蔽层‑多层碳纤维平纹布),n≤10;所述芯材为聚酰亚胺气凝胶板。本发明通过选择特定的芯材与特定复合组成的蒙皮搭配,在确保结合力的情况下兼具密度小、环境适应性好、电磁屏蔽性能高的优点;此外,还具有室温热导率低、力学性能好、热稳定性优异、阻燃性能较好等优点,是替代高铁车体铝型材的理想材料,可进一步提升高铁的速度和运载能力。


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    Title :

    Carbon fiber sandwich composite material and preparation method and application thereof


    Additional title:

    一种碳纤维夹芯复合材料及其制备方法与应用


    Contributors:
    SUN LIN (author) / CUI JIAN (author) / FENG QINGPENG (author) / GAO YULONG (author) / TIAN AIQIN (author)

    Publication date :

    2020-05-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM , Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse / B61D Einzelheiten oder Arten des Wagenaufbaus von Eisenbahnfahrzeugen , BODY DETAILS OR KINDS OF RAILWAY VEHICLES



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