氧化石墨烯和石墨相氮化碳增强炭/酚醛复合材料界面热烧蚀性能对比  

A comparative study of the ablation properties of carbon fiber-reinforced phenolic resin composites with a matrix modified with graphene oxide and graphitic carbon nitride

作　　者：马媛媛 杨禹[1,3] 吕春祥[1,3] 吕晓轩[1,3] 武世杰 尉壮 MA Yuan-yuan;YANG Yu;LU Chun-xiang;LU Xiao-xuan;WU Shi-jie;YU Zhuang(Key Laboratory of Carbon Materials,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China;University of Chinese Academy of Sciences,Beijing 100049,China;National Engineering Laboratory for Carbon Fiber Technology,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China)

机构地区：[1]中国科学院山西煤炭化学研究所中国科学院炭材料重点实验室,山西太原030001 [2]中国科学院大学,北京100049 [3]中国科学院山西煤炭化学研究所碳纤维制备技术国家工程实验室,山西太原030001

出　　处：《新型炭材料》2019年第1期29-37,123,共10页New Carbon Materials

基　　金：国家自然科学基金(U1710122)~~

摘　　要：为了提高炭/酚醛复合材料的烧蚀性能,分别采用两种炭纳米填料对纤维增强体界面进行改性。以氧化石墨烯(GO)和酸化石墨相氮化碳(ag-C_3N_4)改性低负载(0.05 wt%～0.2 wt%)的炭/酚醛复合材料。用氧乙炔火焰、SEM、XRD、Raman研究烧蚀面形貌与纤维石墨化度。结果表明:随着GO和ag-C_3N_4含量由0升至0.2 wt%,GO/CF-PR和ag-C_3N_4/CF-PR复合材料的耐烧蚀性能均呈现先增加后降低的趋势。其中以0.1 wt%添加量为最佳,0.1ag-C_3N_4/CF-PR和0.1GO/CF-PR复合材料比起纯的CF-PR的质量烧蚀率分别降低44.42%和28.96%,归因于ag-C_3N_4和GO可显著提高基体的炭残率和烧蚀区纤维表面的石墨化度。The ablative properties of carbon fiber/phenolic resin(CF/PR)composites were investigated for a graphene oxide(GO)-and a graphitic carbon nitride(g-C3N4)-modified matrix with contents of 0.05,0.1 and 0.2 wt%,respectively.Both the CF/(g-C3N4-PR)and CF/(GO-PR)composites showed much better ablation resistance than the one without g-C3N4 and GO.The optimum contents of g-C3N4 and GO are both 0.1 wt% giving mass ablation rates for CF/(0.1% g-C3N4-PR)and CF/(0.1% GO-PR)that were respectively 44.42 and 28.96% lower than that of the CF/PR composite.The addition of g-C3N4 and GO increases the char yield and the degree of graphitization of the char near the fibers during ablation,which benefits heat dissipation and thereby increases the ablation resistance.

关 键 词：氧化石墨烯 酸化g-C3N4 炭/酚醛复合材料 耐烧蚀 

分 类 号：TB33[一般工业技术—材料科学与工程]