CAJ | 학술논문

阐述形状记忆聚氨酯的形成机制及其温度响应特性,介绍形状记忆性能的表征方法.设计开发了不同结构参数的系列温敏形状记忆机织物并测试了记忆性能.结果表明:随着形状记忆(SM)纤维线密度的增加,形状记忆性能的提高程度不明显;组织结构方面以平纹织物的形状记忆性能为最佳,而其他组织结构织物之间无明显差异;随着紧度的增加,单相SM织物的形状回复率(SR)呈下降趋势而形变固定率(SF)略有上升倾向,双相SM织物则SR和SF均呈下降趋势;竹纤维经纱织物的记忆性能最佳,其他纤维经纱织物之间无明显差异;双相SM织物的SR明显高于单相SM织物,而单相SM织物的SF又较为明显地优于双相SM织物;单相SM织物在另一相上也具备形状记忆性能但指标值明显降低;纬纱含SM纤维织物的经向SF总体高于纬向.
천술형상기억취안지적형성궤제급기온도향응특성,개소형상기억성능적표정방법.설계개발료불동결구삼수적계렬온민형상기억궤직물병측시료기억성능.결과표명:수착형상기억(SM)섬유선밀도적증가,형상기억성능적제고정도불명현;조직결구방면이평문직물적형상기억성능위최가,이기타조직결구직물지간무명현차이;수착긴도적증가,단상SM직물적형상회복솔(SR)정하강추세이형변고정솔(SF)략유상승경향,쌍상SM직물칙SR화SF균정하강추세;죽섬유경사직물적기억성능최가,기타섬유경사직물지간무명현차이;쌍상SM직물적SR명현고우단상SM직물,이단상SM직물적SF우교위명현지우우쌍상SM직물;단상SM직물재령일상상야구비형상기억성능단지표치명현강저;위사함SM섬유직물적경향SF총체고우위향.
The principle of compositionality and temperature-response characteristic of shape-memory polyurethane was introduced and a method to describe this shape-memory properties was given.A series of thermo-sensitive shape-memory woven fabrics which have different structure parameters have been developed and tested.The testing results showed that the shape-memory property was not strengthened obviously with the increasing of shape-memory(SM)fiber line density.Moreover,plain woven fabric had the best shape.memory properties,but there were not obvious differences among other woven structures.In addition.with the increasing of fabric tightness,single-way SM fabric shape recovery ratio(SR)would decline and the shape fixity ratio(SF)would rise slightly,but both the SR and SF of two-way fabric would drop.When using bamboo fiber as the warp yarns,the fabric had the best shape-memory property.However.no evident differences were shown when using other fiber as warp yarn.Furthermore,the SR of two-way SM fabic was higher significantly than that of single-way fabrie,but the SF of single-way SM fabric was superior to that of two-way fabric.Finally,the results showed that the other way of single-way SM fabric also had shape-memory function but with lower index,and as to fabrics with SM as weft yarn,the SF in warp direction was totally higher than that in weft direction.