基于预/主刺协同的针刺织物力学性能提升方法  

A method for improving mechanical properties of needled fabrics based on synergy of pre-needling and main needling

作　　者：陈小明[1,2,3] 任志鹏 郑宏伟 吴凯杰 苏星兆 陈利[1,2] CHEN Xiaoming;REN Zhipeng;ZHENG Hongwei;WU Kaijie;SU Xingzhao;CHEN Li(School of Textile Science and Engineering,Tiangong University,Tianjin 300387,China;Key Laboratory of Advanced Textile Composite Materials of Ministry of Education,Tiangong University,Tianjin 300387,China;School of Mechanical Engineering,Tiangong University,Tianjin 300387,China)

机构地区：[1]天津工业大学纺织科学与工程学院,天津300387 [2]天津工业大学先进纺织复合材料教育部重点实验室,天津300387 [3]天津工业大学机械工程学院,天津300387

出　　处：《纺织学报》2023年第4期100-107,共8页Journal of Textile Research

基　　金：天津市教委科研计划项目(2018ZD13);先进功能复合材料技术重点实验室基金项目(6142906210406)。

摘　　要：现有的针刺工艺常采用提高针刺密度来提高针刺织物的层间剥离性能,但同时也加剧了基布的纤维损伤,导致织物的面内拉伸强度下降,提出一种新的基于预/主刺协同的针刺织物力学性能提升方法,可同时实现层间剥离性能和面内拉伸性能的提升。基于预/主刺协同针刺新工艺,制备了针刺织物,开展了织物结构表征、层间剥离性能测试和面内拉伸性能研究,并同传统的针刺工艺进行对比。研究结果表明:相同总针刺密度的条件下,预/主刺协同针刺新工艺极大的提高了针刺纤维束的含量,增幅达到63.1%~93.1%,且预/主刺协同针刺织物的针刺纤维束呈现较粗、较长的特征;层间剥离性能提高了56.16%~58.46%,面内拉伸性能增加了8.8%~15.7%。这是由于预刺工艺生成了预制孔,利于后续主刺工艺将更多短纤维带入厚度方向形成针刺纤维束;同时,预/主刺协同针刺工艺采用针刺密度减半、针刺遍数翻倍、原位针刺的思路,有效的减小了针刺损伤区域面积,提高了针刺织物的面内拉伸强度。Objective The purpose of this paper was to study a needling process,proposed the concept of needling prefabricated holes and the synergistic needling method of prefabrication and needling,and strengthened the connection of needled bundles through the synergistic method of pre-needling and main needling,while reducing the needled on the fabric surface.The damage of the inner fibers could improve the interlaminar peeling performance and the in-plane tensile performance of the needled fabric at the same time,which provided a new idea and method for the preparation of high-performance needled fabrics.Method In this paper,carbon fiber non woven fabric and carbon fiber felt were used to prepare needled preforms in the form of carbon cloth/felt lamination.Under the same conditions,traditional needled fabrics and pre-needling and main needling synergistic needled fabrics were prepared using the traditional needling process and the pre-needling and main needling synergistic process.The mechanical properties of the two fabrics were characterized through a series of experiments,and the strengthening principle of the pre-needling and main needling synergistic process was revealed.Results In the pre-needling and main needling synergistic process,pre-needling formed prefabricated holes,and the main needling was in situ needled at the pre-needling point.The synergistic effect of the two played a role in strengthening interlaminar connection and reducing in-plane fiber damage.The interlaminar peeling properties of the two were characterized by performing the interlaminar peeling experiment on the prepared needled fabrics.The interlaminar peeling property of the latter under different total needling densities were improved by 56.16%-58.46%compared with the former(Fig.6).The 3-D profiler was used to observe the fiber bundle morphology on the interlaminar peeling surface,and the fiber bundle volume was counted.It could be seen from interlaminar peeled fabric that the pre-needling and main needling synergistic process had less shear

关 键 词：针刺技术 预制体 针刺织物 拉伸性能 剥离性能 

分 类 号：TS102[轻工技术与工程—纺织工程]