类石墨氮化碳及其MCA杂化物的合成与阻燃  

Preparation and Flame Retardancy of Graphitic Carbon Nitride and Its Hybrid with MCA

作　　者：郭承鑫 孙黎明 姚坤成 王朝生[1] 彭志宏 彭治汉[1] GUO Chengxin;SUN Liming;YAO Kuncheng;WANG Chaosheng;PENG Zhihong;PENG Zhihan(State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Materials Science and Engineering,Donghua University,Shanghai 201620,China;Shanghai Lidao New Material Sci&Tech Co.,Ltd.,Shanghai 201620,China)

机构地区：[1]东华大学材料科学与工程学院,纤维材料改性国家重点实验室,上海201620 [2]上海力道新材料科技股份有限公司,上海201620

出　　处：《塑料》2020年第2期144-147,共4页Plastics

摘　　要：采用三聚氰胺作为原料,通过梯度加热制备了类石墨氮化碳(g-C3N4),再以三聚氰胺、氰尿酸和自制g-C3N4合成了三聚氰胺氰尿酸杂化物(CNMCA)。采用FTIR、XRP和TDA对g-C3N4和CNMCA的结构与热性能进行了表征。将CNMCA应用在聚酰胺6中制备了阻燃复合材料,同时,采用垂直燃烧和极限氧指数法分析了阻燃效果。结果表明,g-C3N4具有较高的热稳定性,其热失重5%(T-5%)的温度高达544.9℃。另外,g-C3N4的杂化不同程度地提高了MCA的热稳定性。当杂化比例为30%时,CNMCA的T-5%由345.5℃提升到352.3℃,在600℃下的残余质量由0.43%显著提升到23.45%。CNMCA的阻燃性能比MCA更佳,当添加到10%CNMCA30时,试样燃烧时的熔滴已无法使脱脂棉被引燃,因此,阻燃等级从UL94 V-2提升到UL94 V-0级,极限氧指数也从27.8%提升至31.3%。Graphitic carbon nitride(g-C3N4)was prepared by melamine as raw material through gradient heating.Melamine,melamine cyanurate and homemade g-C3N4 were then used to synthesize melamine cyanurate hybrid(CNMCA).The structures and thermal properties of g-C3N4 and CNMCA were characterized by FTIR,XRD and TGA.CNMCA was subsequently applied to prepare flame retardant composite in polyamide 6 and its flame retardancy was studied by vertical burning test and limited oxygen index test as well.The results showed that g-C3N4 had high thermal stability and its 5%weight loss temperature(T-5%)was as high as 544.9℃.Besides,the hybridization of g-C3N4 improved the thermal stability of MCA.When the hybridization ratio was 30%,the T-5%of CNMCA increased from 345.5℃to 352.3℃and the residual quality at 600℃was significantly increased from 0.43%to 23.45%.The flame retardancy of CNMCA was better than MCA.When adding 10%CNMCA30,the droplets were unable to ignite the absorbent cotton.Thus,the flame retardant rating was upgraded from UL94 V-2 to UL94 V-0 and the limited oxygen index increased from 27.8%to 31.3%.

关 键 词：类石墨氮化碳 三聚氰胺氰尿酸 杂化物 阻燃性 聚酰胺6 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]