摘要
本研究采用干-湿相转化法,用内径不同但壁厚相同的纺丝头通过调节纺丝时的参数(挤出速率、绕丝速率、内芯液流量),成功纺制出与纺丝头尺寸一致的中空纤维。并用动态热机械分析仪(DMA)的3种不同夹具(剪切、拉伸、单悬臂梁)对样品进行测试,研究内径和受载模式对中空纤维阻尼材料阻尼性能的影响。结果表明:壁厚相同,中空纤维具有自然支撑刚度时,中空纤维的内径越大阻尼性能越好,且3种夹具测试结果都符合这一规律,表明中空气囊对该中空纤维阻尼材料的结构阻尼确有附加阻尼效果。当对比同种样品不同受载模式的测试结果时,发现阻尼峰值呈剪切>拉伸>单悬臂梁,且玻璃化转变温度依次向低温方向移动。
In this study, using the method of dry-wet phase inversion, we had spun the hollow fiber membrane with the same size as that of the spinning head successfully, by adjusting the spinning parameters （ inner liquid flow; extrusion speed; revolving speed）with the different inner diameter same film thickness spinning head. The samples were tested by three different fixtures （ shear, tensile, single cantilever beam） of dynamic thermal mechanical analyzer （DMA） , and study the effect of inner diameter on damping capacity of hollow fiber membrane. The results show that when the film thickness is the same, the bigger the inner diameter is, the better the damping performance is （the hollow fiber membrane is naturally supported）, and the results all follow this rule, indicating that hollow balloon does have additional effects to the structure damping of materials. When compare the results of different loading model for same sample, found that the damping peak appears shear 〉 tensile 〉 single cantilever beam, and the glass transition temperature shifted to lower temperature sequentially.
出处
《南昌航空大学学报（自然科学版）》
CAS
2017年第3期1-6,共6页
Journal of Nanchang Hangkong University(Natural Sciences)
基金
国家自然科学基金(11472125)
关键词
中空纤维
阻尼
受载方式
内径
纺丝参数
hollow fiber
damping
loading model
inner diameter
spinning parameters
