Islam G M Nazmul, Collie Stewart, Qasim Mohammad, Ali M Azam
Centre for Bioengineering & Nanomedicine, Department of Food Science, Division of Sciences, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand.
Bioproduct & Fiber Technology, AgResearch, Christchurch 8140, New Zealand.
Nanomaterials (Basel). 2020 Nov 24;10(12):2324. doi: 10.3390/nano10122324.
This study demonstrates a scalable fabrication process for producing biodegradable, highly stretchable and wearable melt spun thermoplastic polypropylene (PP), poly(lactic) acid (PLA), and composite (PP:PLA = 50:50) conductive yarns through a dip coating process. Polydopamine (PDA) treated and poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) coated conductive PP, PLA, and PP/PLA yarns generated electric conductivity of 0.75 S/cm, 0.36 S/cm and 0.67 S/cm respectively. Fourier Transform Infrared Spectroscopy (FTIR) confirmed the interactions among the functional groups of PP, PLA, PP/PLA, PDA, and PEDOT:PSS. The surface morphology of thermoplastic yarns was characterized by optical microscope and Scanning Electron Microscope (SEM). The mechanical properties of yarns were also assessed, which include tensile strength (TS), Young's modulus and elongation at break (%). These highly stretchable and flexible conductive PP, PLA, and PP/PLA yarns showed elasticity of 667%, 121% and 315% respectively. The thermal behavior of yarns was evaluated by differential scanning calorimetry (DSC) and thermo-gravimetric analysis (TGA). Wash stability of conductive yarns was also measured. Furthermore, ageing effect was determined to predict the shelf life of the conductive yarns. We believe that these highly stretchable and flexible PEDOT:PSS coated conductive PP, PLA, and PP/PLA composite yarns fabricated by this process can be integrated into textiles for strain sensing to monitor the tiny movement of human motion.
本研究展示了一种可扩展的制造工艺，通过浸涂工艺生产可生物降解、高拉伸性且可穿戴的熔纺热塑性聚丙烯（PP）、聚乳酸（PLA）以及复合材料（PP:PLA = 50:50）导电纱线。经聚多巴胺（PDA）处理并涂覆聚（3,4 - 乙撑二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT:PSS）的导电PP、PLA和PP/PLA纱线的电导率分别为0.75 S/cm、0.36 S/cm和0.67 S/cm。傅里叶变换红外光谱（FTIR）证实了PP、PLA、PP/PLA、PDA和PEDOT:PSS官能团之间的相互作用。用光学显微镜和扫描电子显微镜（SEM）对热塑性纱线的表面形态进行了表征。还评估了纱线的机械性能，包括拉伸强度（TS）、杨氏模量和断裂伸长率（%）。这些高拉伸性且柔韧的导电PP、PLA和PP/PLA纱线的弹性分别为667%、121%和315%。通过差示扫描量热法（DSC）和热重分析（TGA）评估了纱线的热行为。还测量了导电纱线的洗涤稳定性。此外，确定了老化效应以预测导电纱线的保质期。我们相信，通过此工艺制造的这些高拉伸性且柔韧的PEDOT:PSS涂覆导电PP、PLA和PP/PLA复合纱线可集成到纺织品中用于应变传感，以监测人体运动的微小动作。
