摘要：本文合成氧化石墨烯负载沸石咪唑酯骨架(ZIF-8@GO),采用透射电子显微镜（TEM）、FTIR、X射线衍射(XRD)对ZIF-8@GO进行表征。以ZIF-8@GO和间苯二酚双（二苯基磷酸酯）（RDP）为协效阻燃剂，PLA为基体，利用溶液共混法制备得到PLA/ZIF-8@GO/RDP复合阻燃薄膜材料。采用扫描电子显微镜（SEM）、FTIR、拉曼光谱(Raman)、XRD、电子拉力机、热重分析(TG)、垂直燃烧、极限氧指数(LOI)等对PLA复合阻燃薄膜材料进行表征。结果表明，材料的力学性能、热稳定性和阻燃性能均达到不同程度的改善并且当ZIF-8@GO:RDP质量比为1:10（R-2）时，复合薄膜材料的综合性能最好。在机械性能上，相比于纯PLA，样品R-2的拉伸强度从38MPa上升到48MPa，断裂伸长率由3%升至11.3%；同时R-2的极限氧指数从18%上升至27.5%，垂直燃烧达到V-2等级。最后采用SEM、FTIR、XRD和Raman对PLA复合阻燃薄膜材料的残炭进行分析并且观察到连续致密的残炭层。

关键词 ZIF-8@GO 间苯二酚双（二苯基磷酸酯） 聚乳酸 阻燃

毕业设计说明书外文摘要

Title Preparation of MOFs@GO and Its Effect on Flame Retardancy of   Poly(Lactic Acid)

Abstract：In the paper, zeolitic imidazolate framework-8 loaded on oxidized graphite (ZIF-8@GO) was prepared and characterized by transmission electron microscopy (TEM), FTIR and X-ray diffraction(XRD). The flame retardant poly(lactic acid) (PLA) composite films were successfully prepared by solution blending using PLA as matrix, ZIF-8@GO and resorcinol di(phenyl phosphate) (RDP) as flame retardants. The properties of PLA composite films were studied by scanning electron microscopy(SEM), FTIR, Raman, XRD, electronic tensile machine, thermal gravimetry analysis(TG), limiting oxygen index(LOI) and other methods. The results show that the thermal stability, the mechanical property and the flame retardancy of PLA composite films are improved in varying degree. When the mass ratio of the ZIF-8@GO :RDP is 1:10, R-2 composites get the optimal comprehensive properties. The tensile strength of R-2 could reach up to 48 MPa in comparison with 38 MPa of the pure PLA. Meanwhile，the elongation at break is also improved from 3% to 11.3%. As for retardant properties, the limiting oxygen index of R-2 reaches 27.5%, and V-2 rating is achieved. The char residues were analyzed by SEM, FTIR, XRD and Raman. It is found that a continuous dense carbon layer is formed.

Keywords ZIF-8@GO Resorcinol di(phenyl phosphate) Poly (lactic acid) Flame retardant

目 次

1绪论 1

1.1聚乳酸简介 1

1.1.1聚乳酸的结构 1

1.1.2聚乳酸的性质 1

1.1.3聚乳酸的制备 2

1.1.4聚乳酸的应用 3

1.2聚乳酸无卤阻燃研究进展 3

1.2.1卤系阻燃聚乳酸 4

1.2.2磷系阻燃聚乳酸 4

1.2.3氮系阻燃聚乳酸 4

1.2.4硅系阻燃聚乳酸 5

1.2.5无机纳米粉体阻燃聚乳酸 5

1.2.6协效阻燃聚乳酸 5

1.3研究内容 5

1.4研究意义 6

2实验内容