Enhanced Mechanical and Acoustic Properties of Basalt Fiber/Polyurethane Composites by Silane Coupling Agents

Mengchen Ge, Xiaodong Li*, Fei Han, Xing Su, Hao Jiang, Youhao Liu, Yangwei Wang, Meishuai Zou*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Article number61
JournalPolymers
Volume17
Issue number1
DOIs
Publication statusPublished - Jan 2025

Keywords

  • composites
  • microphase separation
  • polyurethane elastomer
  • surface modification

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Ge, M., Li, X., Han, F., Su, X., Jiang, H., Liu, Y., Wang, Y., & Zou, M. (2025). Enhanced Mechanical and Acoustic Properties of Basalt Fiber/Polyurethane Composites by Silane Coupling Agents. Polymers, 17(1), Article 61. https://doi.org/10.3390/polym17010061