改性空心玻璃微珠/环氧树脂复合材料的制备及性能研究

Preparation and performance study of modified hollow glass microspheres/epoxy resin composite materials

采用3-氨基丙基三乙氧基硅烷(KH550)、γ-缩水甘油醚氧丙基三甲氧基硅烷(KH560)和聚多巴胺(PDA)对空心玻璃微珠进行改性,并由改性后的空心玻璃微珠与环氧树脂制得复合材料。对改性后的空心玻璃微珠进行了红外光谱、EDS能谱、微观形貌等分析,对复合材料的界面结合性、力学性能及耐静水压性进行了研究。结果表明:经硅烷偶联剂以及聚多巴胺改性后,空心玻璃微珠与环氧树脂界面结合力更大,复合材料具有高力学强度和低吸水率。水压50MPa时仍保持极低的吸水率,可在5km深海中使用。

The hollow glass beads were modified with 3-aminopropyl triethoxy-silane(KH550),γ-glycidyl ether oxy-propyl trimethoxysilane(KH560)and polydopamine(PDA),respectively.The modified hollow glass beads were analyzed by infrared spectrum,EDS spectrum and microscopic morphology.The interfacial bonding,mechanical properties and hydrostatic pressure resistance of the composites were investigated.The results showed that after modification by silane coupling agent and polydopamine,the hollow glass microspheres had a greater interfacial bonding force with epoxy resin,and the composite materials had high mechanical strength and low water absorption.At a water pressure of 50MPa,it still maintained an extremely low water absorption rate and could be used in 5km deep sea.