HKUST-1@APP环氧树脂阻燃复合材料的合成与性能

Preparation of HKUST-1@APP and the flame retardant epoxy composites with it

摘要:

使用溶剂热法将HKUST-1〔Cu3(BTC)2， BTC为1,3,5-苯三甲酸〕负载到聚磷酸铵（APP）的表面制得HKUST-1@APP，然后将不同量的HKUST-1@APP与环氧树脂（EP）混合后固化制备HKUST-1@APP / EP阻燃复合材料。通过水平垂直燃烧测定仪、氧指数测定仪、电子拉力机等对EP复合材料进行了阻燃和力学性能分析。结果表明，当HKUST-1@APP的添加量为总体系的5%时，复合材料EAC-5的极限氧指数为27.5 %，垂直燃烧测试（UL-94）通过V-1级。添加HKUST-1@APP后，样品残炭的AD/AG(拉曼光谱中无定形碳的碳原子与晶体碳中SP2杂化的碳原子振动分别形成的D峰与G峰的峰面积比)降低到0.043，而添加总质量5%APP的EA-5的AD/AG为0.3161，说明HKUST-1@APP还可以改善环氧树脂燃烧过程中产生的炭层，使炭层更连续、石墨化程度更高。

Abstract:

The HKUST-1@APP was prepared by loading HKUST-1〔Cu3(BTC)2, BTC means trimesic acid〕on the surface of ammonium polyphosphate (APP) via solvothermal method. The flame-retardant composites (HKUST-1@APP/EP) were prepared by mixing different amounts of HKUST-1@APP with epoxy resin (EP). The flame retardant and mechanical properties of EP composites were investigated by horizontal and vertical combustion tester,, oxygen index tester, electronic tensile machine, et al. The results showed that while adding 5% of HKUST-1@APP, the limiting oxygen index of EAC-5 was 27.5%, and the vertical combustion test (UL-94) passed the V-1 level. The AD/AG(the peak area ratio of D and G peaks formed by the vibration of carbon atoms in amorphous carbon and SP2 hybrid carbon atoms in graphite carbon in Raman spectrum)of the residual char was reduced to 0.043 compared to 0.3161 of EA-5 which was added 5% APP. It indicated that HKUST-1@APP could improve the char layer produced during combustion and make the char layer more continuous and graphitized.