Ge Mengchen, Li Xiaodong, Han Fei, Su Xing, Jiang Hao, Liu Youhao, Wang Yangwei, Zou Meishuai
School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China.
Division of Functional Materials Research, Central Iron and Steel Research Institute, Beijing,100081, China.
Polymers (Basel). 2024 Dec 29;17(1):61. doi: 10.3390/polym17010061.
Modified basalt microfiber-reinforced polyurethane elastomer composites were prepared by a semi-prepolymer method with two different silane coupling agents (KH550 and KH560) in this study. Infrared spectroscopy was used to quantify the degree of microphase separation and analyze the formation of hydrogen bonding in polyurethane. The interfacial surface and the morphology of fibers and composites from tensile fracture were examined by a scanning electron microscope. Further measurements were performed on an electronic universal testing machine for characterizing the mechanical properties of composites. Moreover, the loss factor and transmission loss of composite materials were obtained from dynamic thermomechanical analysis and acoustic impedance tube, respectively. The suitable concentrations in the modification of basalt fibers were established at 1% for KH550 and 1.5% for KH560. The best overall performance was obtained in KH550-BMF/PUE group, as the properties increased by 31% in tensile strength, 37% in elongation at break, and 21% in acoustic insulation.
本研究采用半预聚物法，使用两种不同的硅烷偶联剂（KH550和KH560）制备了改性玄武岩微纤维增强聚氨酯弹性体复合材料。采用红外光谱法定量分析聚氨酯的微相分离程度并分析氢键的形成。通过扫描电子显微镜观察拉伸断裂后纤维与复合材料的界面表面及形态。在电子万能试验机上进行进一步测量以表征复合材料的力学性能。此外，分别通过动态热机械分析和声阻抗管获得复合材料的损耗因子和传输损耗。确定KH550改性玄武岩纤维的合适浓度为1%，KH560为1.5%。KH550-BMF/PUE组获得了最佳综合性能，其拉伸强度提高了31%，断裂伸长率提高了37%，隔音性能提高了21%。
