纳米二氧化硅/有机磷协同阻燃木塑复合材料性能的研究  

Study on the Properties of Nano-SiO_(2)/Organophosphorus Synergistic Flame Retardant Wood-Plastic Composites

作　　者：徐伟华 XU Wei-hua(School of Materials and Environment,Guangxi University for Nationalities,Nanning 530008,Guangxi,P.R.China;Guangxi Key Laboratory of Chemistry and Engineering of Forest Products,Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products,Nanning 530008,Guangxi,P.R.China)

机构地区：[1]广西民族大学材料与环境学院,广西南宁530008 [2]广西林产化学与工程重点实验室,广西林产化学与工程协同创新中心,广西南宁530008

出　　处：《林产工业》2022年第2期13-16,27,共5页China Forest Products Industry

基　　金：广西民族大学科研基金项目(2019KJQN003);广西自然科学基金青年科学基金项目(2019GXNSFBA185020)。

摘　　要：以桉木粉、低密度聚乙烯(LDPE)和马来酸酐接枝低密度聚乙烯(LDPE-g-MAH)为主要原料,采用熔融共混法制备木塑复合材料(WPC),并以γ-氨丙基三乙氧基硅烷改性纳米二氧化硅(Nano-SiO_(2))与有机磷阻燃剂(D-bp)为复配阻燃剂对其进行阻燃改性。通过锥形量热、热重分析(TGA)对WPC的阻燃性能、热性能进行分析。结果表明:当改性Nano-SiO_(2)与D-bp添加量分别为3%和7.5%时,协同阻燃WPC具有优异的综合性能,峰值热释放速率、总热释放量、峰值质量损失速率和峰值比消光面积分别为358.3kW/m^(2)、103.4MJ/m^(2)、0.123g/s和693m^(2)/s,与未阻燃改性WPC相比分别降低25.7%、21.8%、51.6%和85.5%;失重5%的热分解温度和残炭率为276.2℃和17.9%,分别提高119℃和5.3%;拉伸强度也提高了61.8%。Eucalyptus powder,low density polyethylene(LDPE)and maleic anhydride grafted low density polyethylene(LDPE-g-MAH)were used as main raw materials to make wood-plastic composites(WPC).Nano-SiO_(2) modified byγ-aminopropyl triethoxysilane and organophosphorus flame retardant(D-bp)were used as compound flame retardant to modify WPC.The flame retardancy and thermal properties of WPC were studied by cone calorimetry and thermogravimetric analysis(TGA).The results showed that the synergistic flame retardant WPC had excellent comprehensive properties.When the amount of modified Nano-SiO_(2) and D-bp was 3%and 7.5%,the peak of heat release rate,total heat release,the peak of mass loss rate and the peak of specific extinction area were 358.3 kW/m^(2),103.4 MJ/m^(2),0.123 g/s and 693 m^(2)/s,which declined by 25.7%,21.8%,51.6%and 85.5%,respectively,compared with the control WPC.The thermal decomposition temperature of 5%weight loss and the residue mass were 276.2℃and 17.9%,which increased 119℃and 5.3%,as well as tensile strength improved 61.8%comparinged to control group.

关 键 词：木塑复合材料 协同阻燃 无卤阻燃 纳米二氧化硅 有机磷阻燃剂 

分 类 号：TS64[轻工技术与工程]