石墨烯在聚乳酸膨胀阻燃中的协效作用

发布时间：2018-03-04 10:06

  本文选题：聚乳酸　切入点：复合材料　出处：《消防科学与技术》2017年04期 　论文类型：期刊论文

【摘要】：利用改进的Hummers法制备氧化石墨,再进一步制备石墨烯(GR)。将GR作为协效剂与膨胀型阻燃剂(IFR)复配,应用于生物可降解材料聚乳酸(PLA)的阻燃改性,研究GR在PLA膨胀阻燃中的协效作用。采用原子力显微镜、热重分析仪、氧指数仪、水平垂直燃烧测定仪、扫描电子显微镜、激光拉曼光谱对GR、PLA的性能进行表征。结果表明,制备的GR为单片层结构,其在N_2条件下700℃时有84.9%的残留量;加入IFR和GR后PLA复合材料均达到UL-94 V0级别,且LOI显著提高,GR能够显著提高PLA膨胀阻燃体系的热稳定性和阻燃性能。
[Abstract]:Graphite oxide was prepared by improved Hummers method, and graphene GRN was further prepared. Gr was used as a synergistic agent and an intumescent flame retardant to modify the flame retardant of biodegradable poly (lactic acid). The synergistic effect of gr on intumescent flame retardancy of PLA was studied. The properties of PLA were characterized by atomic force microscope, thermogravimetric analyzer, oxygen index meter, horizontal and vertical combustion tester, scanning electron microscope and laser Raman spectroscopy. The prepared gr has a monolayer structure with a residual amount of 84.9% at 700 鈩，

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