首页|聚(3,4-乙撑二氧噻吩):聚苯乙烯磺酸基复合导电纤维的制备及其性能

聚(3,4-乙撑二氧噻吩):聚苯乙烯磺酸基复合导电纤维的制备及其性能

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为探究导电填料的掺杂方式对纤维结构和性能的影响机制,以聚(3,4-乙撑二氧噻吩):聚苯乙烯磺酸(PEDOT:PSS)为基体,银纳米线和石墨烯为导电填料,采用湿法纺丝技术制备了 PEDOT:PSS基复合纤维,并采用聚氨酯(PU)对纤维进行封装.利用扫描电镜、电化学工作站、万能试验机、疲劳试验机、接触角测量仪对纤维的结构和性能进行表征,分别研究了纺丝液和凝固浴中导电填料对纤维结构和电学性能的影响.结果表明:采用凝固浴掺杂法易将导电填料附着于纤维表面,所制备复合纤维的电导率为(421.19±75.14)S/cm,相较于纯PEDOT:PSS纤维提高了 22.4％;复合纤维表面亲水性强,静态接触角为62.9°;PU封装复合纤维具有优异的弯曲稳定性和耐水洗性能.
Preparation and properties of poly(3,4-ethylene supported dioxythiophene)/polystyrene sulfonic acid based composite conductive fibers
Objective Intelligent textiles with excellent serviceability and electrical performance require the use of high-performance conductive fibers.Wet-spun conductive fibers have great potential in various smart and functional yarns and fabrics.The doping of conductive fillers into fibers is an efficient way to improve fiber conductivity.However,the effect of conductive fillers dispersed into the coagulation bath on the electrical properties of wet-spun fibers was not sufficiently investigated.This research aims to study the effect of doping method and doping ratio of conductive fillers on the electrical properties of poly(3,4-ethylene supported dioxythiophene):polystyrene sulfonic acid(PEDOT∶PSS)-based fibers.Method Graphene and silver nanowires(Ag NWs)were used as conductive fillers,PEDOT∶PSS was used as the matrix,deionized water was used as the solvent,isopropanol and dimethyl sulfoxide were used as coagulation bath to fabricate wet-spun PEDOT∶PSS based composite fibers.Conductive fillers were directly mixed into the spinning solution or only dispersed into the coagulation bath.In addition,polyurethane(PU)encapsulated composite fiber was fabricated by the immersion method.Results The wet-spun composite fibers showed uniform diameter.Based on the bidirectional diffusion of spinning liquid and coagulators,the graphene and Ag NWs dispersed in the coagulation bath were closely adsorbed onto the surface of the PEDOT∶PSS fiber.The PEDOT∶PSS fiber doped with Ag NWs into spinning solution(sample 4)demonstrated the highest electrical conductivity(577.98±157.33)S/cm,and PEDOT∶PSS-based composite fiber(sample 7)fabricated by graphene and Ag NWs dispersed into the coagulation bath showed the second-highest conductivity(421.19±75.14)S/cm.Considering the cost in real production,composite fibers(sample 7)fabricated in the coagulation bath with conductive fillers were considered more feasible.The strain and stress of the composite fiber were 1.23％and 37 MPa,respectively.The resistance of the composite fiber showed gradual increasing during the tensile loading process.When the strain reaches 0.75％,the gauge factor(GF)of composite fiber was 0.18 and was increased to 3.12 until it breaks at 1.23％.The static contact angle of composite fiber was 62.9°.The electric conductivity of polyurethane(PU)encapsulated composite fibers illustrated a decrease by 10.7％compared with that of composite fiber,but demonstrated ability to withstand cyclic three-point bending 6 000 times after which the resistance change of the fiber was below 0.12％.After water washing,the resistance of the PU encapsulated composite fiber was increased.After three times of water washing(about 30 min),the conductivity of encapsulated fiber stabilizes and remained at 260 S/cm.Conclusion In this work,PEDOT∶PSS based composite fiber with high conductivity and good stability are prepared by the wet spinning method.By adjusting the doping ratio and methods of graphene and silver nanowires into PEDOT∶PSS,the conductivity of composite fibers is improved.Dispersing conductive fillers into the coagulation bath is found to be more feasible to fabricate high-performance conductive composite fibers.The resulting composite fibers show promise for small strain sensing and the surface of composite fiber is hydrophilic.The PU-encapsulated composite fibers exhibit good bending resistance as well as the water washing resistance.After three times of water washing,the electrical performance of PU-encapsulated composite fiber becomes stable.The proposed methods provide a new approach for wet-spun conductive composite fibers to achieve high electric conductivity and good stability simultaneously.

conductive fiberpoly(3,4-ethylene supported dioxythiophene):polystyrene sulfonic acidgraphenesilver nanowirewet spinningconductive property

吴帆、梁凤玉、肖奕葶、杨智博、王文婷、樊威

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西安工程大学纺织科学与工程学院,陕西西安 710048

西安工程大学功能性纺织材料及制品教育部重点实验室,陕西西安 710048

西安工程大学柔性电子与智能纺织研究院,陕西西安 710048

西安工程大学电子信息学院,陕西西安 710048

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导电纤维 聚(3,4-乙撑二氧噻吩):聚苯乙烯磺酸 石墨烯 银纳米线 湿法纺丝 导电性能

陕西省自然科学基础研究计划项目西安工程大学大学生创新训练计划项目中国纺织工业联合会科技指导性项目陕西数理基础科学研究项目

2022JQ-039S202210709119202000323JSQ020

2024

10.13475/j.fzxb.20230403901

纺织学报
中国纺织工程学会

纺织学报

CSTPCD北大核心
影响因子：0.699
ISSN：0253-9721
年,卷(期)：2024.45(8)