热膨胀微球增强剪切增稠胶/聚氨酯泡沫复合材料的力学性能

Mechanical Properties of Thermo-expandable Microspheres Reinforced Shear Thickening Gel/Polyurethane Foam Composites

使用热膨胀微球和水为发泡剂制备剪切增稠胶增强聚氨酯泡沫。采用正交实验法选取了制备剪切增稠胶/聚氨酯泡沫复合材料的最佳工艺。研究了热膨胀微球含量对剪切增稠胶/聚氨酯泡沫的密度、压缩强度、静态吸能量等力学性能的影响。研究结果表明,130℃下剪切增稠胶质量分数为15%,异氰酸酯指数为0.9,热膨胀微球质量分数为3%时制备的泡沫性能最佳。另外,热膨胀微球的加入会使体系的黏度发生变化,影响发泡效果。添加热膨胀微球不仅使泡沫的密度减小,而且使泡沫的压缩强度和静态吸能量增大。利用热膨胀微球可制备出轻质的吸能材料。

Using thermo-expandable microspheres and water as blowing agent,shear thickening gel reinforced polyurethane foam composites were prepared.The orthogonal test method was used to find the best process for preparing shear thickening gel/polyurethane foam composites.Based on the best process,the effects of thermo-expandable microspheres content on the density,compressive strength,and static energy absorption of the composite were studied.The results show that the foam performance is the best when the temperature is 130℃,the mass fraction of shear thickening gel is 15%,the isocyanate index is 0.9 and the thermo-expandable microspheres mass fraction is 3%.In addition,the addition of thermo-expandable microspheres will change the viscosity of the system,thereby affecting the foaming effect.Adding thermo-expandable microspheres not only reduces the density of the foam,but also increases the compressive strength and static energy absorption of the foam.Therefore,thermo-expandable microspheres can produce lightweight energy-absorbing materials.