To reduce the mechanical sensitivity and improve the comprehensive performance of hexanitrohexaazaisowurtzitane(CL-20),3-aminopropyltriethoxysilane(APS)was used as the modifier to modify the surface of CL-20,and graphite oxide(GO)was used as the coating material,CL-20@GO core-shell composite was prepared by electrostatic self-assembly.The tissue morphology of the prepared samples was characterized by water contact angle test,scanning electron microscope(SEM)and X-ray photoelectron spectroscopy(XPS).The thermal performance was tested by differential scanning calorimeter(DSC),and the mechanical sensitivity was tested.The results show that the CL-20 modified by 5％(mass fracton)APS solution has the strongest hydrophilic,indicating the successful introduction of amino groups.The CL-20 particles are coated by GO layer completely.Compared with the raw CL-20,the activation energy of CL-20@GO composite increases by 63.0kJ/mol,the im-pact sensitivity(H50)increases from 13.0 cm to 23.5 cm,and the friction sensitivity decreases from 100％to 24％,showing that the coating of GO by electrostatic self-assembly can significantly reduce the sensitivity of CL-20.
关键词
材料科学/CL-20@GO/表面改性/静电自组装/氧化石墨烯/GO/复合炸药
Key words
material science/CL-20@GO/surface modification/electrostatic self-assembly/graphite oxide/GO/composite explosives
维普
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