弹道冲击下石墨烯和聚乙烯改性芳纶织物的钝伤防护性能

Aramid is widely used in the field of ballistic protection due to its light weight and high strength. In order to improve the trauma resistance of single-layer aramid fabrics, the surface modification methods of thermoplastic resin polyethylene (PE) and graphene nanoparticles (GR) are used innovatively to improve the ballistic performance of aramid fabrics. The trauma resistance and energy absorption of modified aramid fabrics with different mass ratios are studied based on the backface significance (BFS). The results show that both graphene and polyethylene modification methods can improve the blunt trauma resistance. The surface density of the modified fabric is increased slightly by polyethylene modification, but the resistance to blunt injury is significantly improved. Compared with pure aramid fabric, the bullet-proof ability and specific energy absorption value of 10% PE are increased by 18. 0% and 30. 8%, respectively. The increased rigidity of graphene-modified fabric increases its resistance to blunt injury at low speed, but the excessive inter-yarn friction weakens its resistance to blunt injury at high speed. 2% GR is the best ratio for graphene-modified fabric. In addition, the combined design of body armor with 2 layers of 10% PE and 13 layers of six layers of orthogonal UHMWPE unidrectional fabric is obtained through optimization and verification.