碳化硼涂层防刺织物的制备及其性能表征

Preparation and characterization of B4C coated stab-resistant fabrics

为了提高防刺服的防刺性能,减轻其质量并减小厚度,采用碳化硼(B4C)/环氧树脂涂层的方式制备防刺织物。选择粒子直径、质量分数和搅拌温度设计3因素4水平的正交试验,确定最佳分散液制备组合。当粒子直径2.50μm、质量分数49%、搅拌温度30℃时,分散液静置90 min后的相对沉降高度最高,说明此时粒子分散最均匀。将分散液与树脂混合,对芳纶1414平纹布涂层并进行硬挺度、单束抽拔强力、撕裂强力和准静态刺割试验,探究粒子直径、质量分数对涂层织物防刺性能的影响,并结合涂层织物表面、刺口形貌与应力应变曲线,探究涂层防刺织物的防刺机理。结果表明,防刺性能随着粒子直径的减小和质量分数的增加而增大,最大单位质量刺破强力达到486 N/g,较未添加B4C的涂层织物提升了428%。

In order to improve the stab resistance and to decrease the weight and thickness of the stab-resistant clothing,the stab-resistant fabric was prepared by coating boron carbide(B4C)/epoxy resin.A three-factor,four-level orthogonal experiment was designed by selecting the particle diameter,the mass fraction and agitation temperature to determine the optimal dispersion preparation combination.When the diameter was 2.50μm,the mass fraction was 49%,and the mixing temperature was 30℃,the relative sedimentation height of the dispersion after standing for 90 min is the highest,which showed that the particle dispersion was the most uniform in this case.The dispersion was mixed with the resin to coat the aramid fabric and the experiments were carried out on its stiffness,pulling-out,tearing and quasi-static puncture experiments to investigate the effects of the particle diameter and the mass fraction on the stab resistance of the coated fabric,The stab-resistant mechanism of the coated stab-resistant fabric was investigated by analyzing the morphologies of surface and fracture and the stress-strain curves of the coated fabric.The results showed that the stab resistance increased with the decrease of particle diameter and the increase of particle mass fraction.The maximum puncture strength of unit weight fabric reached 486 N/g,428%higher than that of non-granular coated fabric.