Preparation And Performance Control Of Basalt Fiber Reinforced Composites

The demand for lightweight structure and integration of structure and function has become a development trend in fields such as aerospace,automotive,energy,biomedical,and information technology.With the advancement of modern production and technology,fiber composites have been widely used as new materials.Basalt fiber is an ideal green and environmentally friendly material with excellent mechanical properties,stable chemical performance,and low cost.It is expected to gradually replace traditional synthetic fibers as material technology advances.This study used modified basalt fibers to produce basalt fiber-reinforced epoxy resin composites and conducted tests and analysis on their mechanical properties,friction performance,erosion resistance and corrosion resistance.Samples of basalt fiber-reinforced epoxy resin composites with five different fiber contents were tested for tensile performance,three-point bending,impact resistance,and Shore hardness.The results showed that adding an appropriate amount of BF to epoxy resin can improve the mechanical properties of the composite material.When the fiber content of BF/EP composites was 3%,it exhibited the best mechanical performance.Compared to pure epoxy resin,the tensile strength,three-point bending strength,impact strength,and hardness of BF/EP composites increased by 8.359%,76.81%,374%,and63.6% respectively.The molecular structures of basalt fibers before and after modification and basalt fiber-reinforced epoxy resin composites were analyzed through Fourier-transform infrared spectroscopy.The results indicated that KH550 successfully grafted onto the surface of basalt fibers,and the modified BF exhibited good compatibility with epoxy resin,ensuring the structural stability of the composite material.Under the same conditions,friction and erosion wear experiments were conducted on BF/EP composite materials with different fiber contents.The results showed that BF in the epoxy resin matrix could withstand external loads and alleviate crack propagation.By closely combining modified BF with EP,it can effectively prevent EP from peeling off and absorb the energy generated during wear.The BF2%/EP and BF3%/EP samples exhibited better wear resistance,but excessive BF content led to a decrease in the wear resistance of the composite material.In the seawater corrosion test of BF/EP composites,the mechanical properties of the samples soaked in seawater for 60 days were tested,and the mechanical properties of the samples showed a decrease.Among them,the tensile and bending properties of the BF3%/EP sample showed the smallest decrease,with 2.41% and 6.73%respectively.The addition of modified BF improved the corrosion resistance of composite materials.Observation and analysis of the corroded surface morphology revealed swelling differences between the epoxy resin and basalt fibers,leading to matrix cracking and fiber debonding.