文献类型：期刊文献

中文题名：导电微纳纤维复合纱的制备及其气敏特性

英文题名：Preparation of conductive micro-nano fiber composite yarns and their gas-sensitive properties

作者：周歆如[1];范梦晶[1];岳欣琰[1];洪剑寒[1,2];韩潇[1,2]

机构：[1]绍兴文理学院纺织服装学院,浙江绍兴312000;[2]浙江省清洁染整技术研究重点实验室,浙江绍兴312000

年份：2024

卷号：45

期号：2

起止页码：52

中文期刊名：纺织学报

外文期刊名：Journal of Textile Research

收录：北大核心2023、CSTPCD、、EI(收录号：20241415847736)、Scopus、CSCD2023_2024、北大核心、CSCD

基金：浙江省自然科学基金探索公益项目(LTGY24E030001)。

语种：中文

中文关键词：静电纺丝;微纳纤维复合纱;原位聚合;气敏传感;氨气检测;纤维基气敏传感器

外文关键词：electrospinning;micro-nano fiber composite yarn;in-situ polymerization;gas sensing;NH_(3) detection;fiber based gas-sensitive sensor

中文摘要：为开发高质量的气敏传感器,利用水浴静电纺丝法制备以涤纶(PET)为芯纱,聚酰胺6(PA6)纳米纤维为包覆层的微纳纤维复合纱(MNY),基于原位聚合方法对MNY进行连续导电处理,制备微纳米纤维复合纱/聚苯胺(MNY/PANI)复合导电纱,以此作为气敏元件,同时将相同参数下制备的PET/PANI复合导电纱也作为气敏元件进行对照,探究不同结构纱线之间气敏效果的差异。研究结果表明:MNY具备良好的皮芯结构,经导电处理后MNY表面均匀分布了聚苯胺颗粒,MNY/PANI的电导率最高可达7.53 S/cm;相比于PET/PANI气敏元件,MNY/PANI气敏元件因其纳米结构的高比表面积对NH 3的灵敏度更高,能表现出更好的响应-恢复效果,重复性和稳定性更好,已初步具备了作为优良气敏元件的条件。

外文摘要：Objective As the key component for gas sensors,the development of gas-sensitive material has attracted much research attention.At present,research on gas-sensitive materials focused mainly on membrane structures,which has poor flexibility and reprocessability.Therefore,in order to meet different needs and expand the applications,this study proposes a one-dimensional structure gas sensor with better flexibility,deformation ability and textile processability.Method Water bath electrospinning method was used to make the polyamide 6(PA6)spinning solution with a mass fraction of 12%and 24 kV electrostatic voltage,among other experimental parameters.The micro-nano fiber composite yarn(MNY)with polyester(PET)as the core yarn and PA6 nanofiber as the coating layer was prepared,and the MNY/PANI composite conductive yarn was prepared by a continuous conductive treatment method based on in-situ polymerization.The effect of different reaction liquid concentration on the structure and performance of MNY were studied,and the optimal reaction liquid concentration was achieved for preparing MNY/PANI gas sensing elements.Compared with PET/PANI gas sensing elements under the same parameters,the difference in gas sensitivity effect between yarns with different structures was explored.Results After studying the surface morphology of MNY and MNY/PANI,materials conductivity,infrared spectrum and gas sensitivity,analysis was carried out.The nanofibers on the surface of MNY were relatively complete,forming a good skin-core structure,and the nanofibers were smooth and orderly.The surface of the conductive-treated MNY/PANI composite conductive yarn was found to adsorb a large number of particles,and the density of adsorbed particles on the yarn surface increased as the concentration of reaction liquid was increased.With the increase of the concentration of reaction liquid,the conductivity of MNY/PANI composite conductive yarn increased first and then decreased,and the conductivity of MNY/PANI-3 reached the maximum value of 7.53 S/cm.The infrared spectra of PET,MNY and MNY/PANI-3 composite conductive yarns were tested and compared.Compared with PET without any treatment,the characteristic peaks of MNY prepared by electrostatic spinning technology appeared at 3304,1672,1542 and 1170 cm^(-1).This indicated that the surface of MNY after electrostatic spinning was attached with amide group.In addition,MNY/PANI-3 also showed characteristic peaks around 1611,1361 and 810 cm^(-1),indicating that PANI/MNY-3 composite conductive yarn contained PANI.By comparing the response test of MNY/PANI-3 and PET/PANI composite conductive yarns prepared under the same reaction concentration parameter in NH 3 atmosphere,it was found that both reached the maximum sensitivity in the first test,which was 2.70 and 4.62 respectively,and then gradually weakened and eventually plateaued with the increase of the number of cycles.However,the sensitivity of MNY/PANI was consistently better than that of PET/PANI.The difference was that the response curve of PET/PANI had more fluctuations,while the response curve of MNY/PANI was smooth.In addition,with the increase of the number of tests,the response effect of MNY/PANI was better than that of PET/PANI,and the recovery time of MNY/PANI increased with the increase of the number of test cycles,but it was still much smaller than that of PET/PANI.Conclusion After NH 3 detachment,the resistance value of PET/PANI in the air was much different from the initial resistance value,indicating that its reversibility is poor.After repeated testing of MNY/PANI,resistance of gas sensing elements in air could get better recovery,good reversibility and relatively small change in sensitivity.MNY/PANI gas sensor has higher sensitivity to NH 3 due to the high specific surface area of its nanostructure,which is due to the uniform distribution of small PANI particles adsorbed by the nanolayer.Therefore,it can show better response-recovery effect,better repeatability and stability,and has initially possessed the conditions as an excellent gas sensor,indicating the feasibility of one-dimensional structure gas sensor.