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为了提高纺织废胶粉(TWRP)的回收利用的价值,首先,利用TWRP和单孔中空尼龙纤维(NF)制备了一系列NF/TWRP吸声复合材料。然后,通过动态热机械分析仪(DMA)、扫描电镜(SEM)、吸声仪及电子织物拉伸仪等仪器对复合材料的性能和微观结构进行了测试及分析。结果表明:NF的加入导致复合材料的阻尼损耗因子峰值及峰值对应的玻璃化转变温度下降;随NF含量的增加,阻尼损耗因子的峰值继续下降,而玻璃化转变温度变化不大。NF构成的中空纤维网络结构赋予了复合材料吸声性能,复合材料的刚强性得到了明显改善;NF含量越高,纤维网络结构越完善,复合材料的吸声性能就越高;复合材料的应力越大,应变越小。当NF含量为50wt%时,1mm厚的NF/TWRP复合材料在2 500 Hz下的吸声系数高达0.476;当NF含量从10wt%增加到50wt%时,NF/TWRP复合材料的应力从112.1 MPa增大到161.6 MPa,而对应的应变从136.6%变化到13.2%。所得结论为使用TWRP进行功能化开发吸声材料提供了理论基础。
In order to improve the value of TWRP recycling, firstly, a series of NF / TWRP sound-absorbing composites were prepared by using TWRP and single-hole hollow nylon fiber (NF). Then, the properties and microstructure of the composites were tested and analyzed by means of dynamic thermal mechanical analyzer (DMA), scanning electron microscope (SEM), acoustometer and electronic fabric tensile tester. The results show that the addition of NF leads to the decrease of the peak value and the peak value of damping loss factor of composites. With the increase of NF content, the peak value of damping loss factor continues to decline, while the glass transition temperature does not change much. NF composite hollow fiber network structure gives the composite material sound absorption properties, the rigidity of the composite material has been significantly improved; the higher the NF content, the better the fiber network structure, the composite material, the higher the sound absorption performance; composite material stress The larger, the smaller the strain. When the content of NF is 50wt%, the sound absorption coefficient of 1mm thick NF / TWRP composites at 2 500 Hz is as high as 0.476. When the content of NF increases from 10wt% to 50wt%, the stress of NF / TWRP composites increases from 112.1MPa Increases to 161.6 MPa, while the corresponding strain changes from 136.6% to 13.2%. The conclusions obtained provide a theoretical basis for the functional development of sound-absorbing materials using TWRP.