The Effect of Interfacial Modification of Polydopamine and Silicane on Ballistic Performance of Aramid/Polyurethane Composites
The aramid fiber reinforced polyurethane composites(AF@PU),which exhibit high strength and lightweight characteristics,have attracted widespread concerns for advanced personal protective systems.However,the interface has consistently been the scientific issue that permeates composite research and is frequently overlooked.In this work,polydopamine and γ-aminopropyltriethoxysilane modified SiO2(m-SiO2)were used to optimize the interfacial properties,and the effects on ballistic performance and ballistic damage mechanism of composites were deeply investigated.Attributing to the strong bonding strength between fibers and polymer resins improved by them at the interface,the interfacial peeling strength of m-SiO2/PDA/AF@PU is increased by 244.1％(4.68 N/cm);the interlaminar shear strength is increased by 30.7％(6.09 MPa);the tensile,flexural and compressive strength of is maximally increased by 5.0％,91.4％and 69.5％,respectively.Notably,because the introduction of abundant m-SiO2 enhances the interface roughness,m-SiO2/PDA/AF@PU demonstrates the maximal energy absorption value;the ballistic limit velocity is improved from 449.8 m/s of AF@PU to 481.9 m/s of m-SiO2/PDA/AF@PU.This work highlights the optimization of interfacial properties and provides an efficient guideline for the design of next-generation fiber reinforced polymer resin composites.
NETL
NSTL
万方数据
