改性玄武岩纤维/聚氨酯阻尼材料的制备及性能

Preparation and properties of modified basalt fiber/polyurethane damping material based on chemical bonding

摘要:

摘要：使用γ-氨丙基三乙氧基硅烷(KH550)对玄武岩纤维(BF)进行表面处理制备了改性玄武岩纤维(MBF)，以环氧化端羟基聚丁二烯(EHTPB)为原料合成了主链含有环氧基团的EHTPB基聚氨酯(EPU)，通过环氧开环反应连接MBF与EPU制备阻尼材料MBF@EPU。采用SEM、FTIR和XPS对改性前后的玄武岩纤维和聚氨酯的表面形貌、结构进行表征。结果表明，成功的制备了MBF和MBF@EPU。动态热机械分析(DMA)和拉伸试验结果表明，玄武岩纤维能提高EPU的阻尼与力学性能，其中10MBF@EPU的有效阻尼温域达到140.0 ℃，拉伸强度为8.68 MPa，断裂伸长率为329.04%，具有最佳的综合性能。

Abstract:

Abstract: Modified basalt fiber (MBF) has been prepared by surface treatment of basalt fiber (BF) with γ -aminopropyl triethoxysilane (KH550), Ehtpb-based polyurethane (EPU) containing epoxy groups has been synthesized with epoxy-terminated hydroxyl polybutadiene (EHTPB) as matrix, the damping material MBF@EPU has been prepared by epoxy ring-opening reaction between MBF and EPU. The surface morphology and structure of basalt fiber before and after modification and polyurethane were characterized by SEM, FTIR and XPS. The results show that MBF and MBF@EPU are successfully prepared. The results of dynamic thermomechanical analysis (DMA) and tensile test show that basalt fiber can improve the damping and mechanical properties of EPU, The effective damping temperature range of 10MBF@EPU is 140.0℃, the tensile strength is 8.68 MPa and the elongation at break is 329.04%, showing the best comprehensive performance.