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[IEEE 2018 International Flexible Electronics Technology Conference (IFETC) - Ottawa, ON, Canada (2018.8.7-2018.8.9)] 2018 International Flexible Electronics Technology Conference (IFETC) - Smart Fibers Based on Low Dimensional Conductive Materials
摘要： The fragility of traditional metallic or semi-conductive materials hinders their application in flexible electronics. Low dimensional materials including carbon nanotubes, graphene and metal nanowires own outstanding flexibility and have been wildly used to fabricate flexible devices. Bendable/stretchable substrate is another key component of flexible electronics. Various thin polymer films made of polyethylene terephthalate, polyimide, polydimethylsiloxane et. al. were adopted. However, the air impermeability of these substrates will cause discomfort of humanbeing if applied in wearable electronics. Fiber is an ideal substrate for flexible and wearable electronics due to its excellent flexibility/stretchability, superior breathability, abundant microstructure and low cost. Herein, a series of conductive elastomers and strain sensors were fabricated by combining the low dimensional conductive materials with fiber substrates and regulating the microstructure on the interface. With the help of 'twining spring' hierarchical architecture, silver nanowire-double covered yarn (Ag NW-DCY) composite fibers with ultrahigh stretchability were obtained. The conductivity of the composite fibers reached up to 104 S/cm and remained 90% at 2000% tensile strain. Commercial electronic components (LED arrays) were integrated onto a transparent, foldable and stretchable substrate using the composite fibers as stretchable electric wiring, demonstrating the potential application in large-area stretchable electronics. When AgNWs were replaced with graphene, strain sensing fiber with high sensitivity and large working range (100% strain) were fabricated, which enabled the detection of multiple deformation forms, including tensile strain, bending, and torsion. We employ the fibers as wearable sensors, realizing the monitoring of full-range human activities and intricate movement combinations of a robot. Besides, these fibers exhibits fast response, low hysteresis and excellent cycling stability. Another advantage needs to be noted is that these fiber are fabricated by a facial dip coating method, which can be scaled up easily. These smart fibers are of great meaning to the development of flexible and wearable electronics.
关键词： smart textiles,stretchable conductive fibers,wearable electronics
更新于2025-09-23 15:22:29
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Machine-Washable Smart Textiles with Photothermal and Antibacterial Activities from Nanocomposite Fibers of Conjugated Polymer Nanoparticles and Polyacrylonitrile
摘要： Smart textiles based on conjugated polymers have been highlighted as promising fabrics that can intelligently respond to environmental stimuli based on the electrical properties of polymer semiconductors. However, there has been limited interest in the photothermal properties of conjugated polymers that can be applied to smart textiles. We prepared nanoparticles by assembling a conjugated polymer with a fatty acid via an emulsion process and nanocomposite fibers by distributing the conjugated polymer nanoparticles in a polyacrylonitrile matrix. We then fabricated the textiles using the fibers. The resulting fabrics based on nanocomposite fibers show a temperature increase to 50 °C in 10 min under white light irradiation because of efficient photothermal conversion by the conjugated polymer light harvester, while the temperature of a pristine polyacrylonitrile fabric increases to only 35 °C. In addition, excellent antimicrobial activity was confirmed by a 99.9% decrease in the populations of Staphylococcus aureus and Escherichia coli over 24 h because of the effect of the fatty acid in the nanocomposite films and fabrics. Furthermore, the fabric showed efficient durability after a laundry test, suggesting the usefulness of these smart textiles based on conjugated polymer nanoparticles for practical applications.
关键词： smart textiles,smart fabrics,antimicrobial fibers,photothermal conversion,nanocomposite fibers,conjugated polymer nanoparticles,polyacrylonitrile
更新于2025-09-23 15:22:29
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Piezoelectric Micro- and Nanostructured Fibers Fabricated from Thermoplastic Nanocomposites Using a Fiber Drawing Technique: Comparative Study and Potential Applications
摘要： We report an all-polymer flexible piezoelectric fiber that uses both judiciously chosen geometry and advanced materials in order to enhance the piezoelectric response. The fiber features a soft hollow microstructured/nanostructured polycarbonate core surrounded with a spiral multilayer cladding consisting of alternating layers of piezoelectric nanocomposites and conductive polymer. Kilometer-long piezoelectric fibers of submillimeter diameters are thermally drawn from macroscopic preforms. The fibers exhibit high output voltage of up to 6V under moderate bending, and they show excellent durability in a cyclic test. The micron/nano-size multilayer structure enhances in-fiber poling efficiency thanks to the small distance between the conducting electrodes sandwiching the piezoelectric composite layers. Additionally, spiral structure greatly increases the active area of piezoelectric composites, thus promoting higher voltage generation and resulting in 10-100 higher power generation efficiency over the existing piezoelectric cables. Finally, we weave the piezoelectric fibers into technical textiles and demonstrate their potential applications in power generation.
关键词： nanocomposites,textiles,fiber,energy harvesting,piezoelectric
更新于2025-09-23 15:21:21
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Photovoltaic Potential Assessment and Dust Impacts on Photovoltaic Systems in Iran: Review Paper
摘要： Smart-fabric interactive-textile systems offer exciting new possibilities, provided that they exhibit sufficient robustness and autonomy to be reliably deployed in critical applications. Textile multiantenna systems, unobtrusively integrated in a professional garment, are key components of such systems, as they set up energy-efficient and stable wireless body-centric communication links. Yet, their functionality may be further extended by exploiting their surface as energy-harvesting platform. Different state-of-the-art energy harvesters are suitable for compact integration onto a textile antenna. We demonstrate this by integrating a power management system, together with multiple diverse scavenging transducers and a storage module, on a well-chosen textile antenna topology. We provide guidelines to ensure that the additional hardware does not affect the textile antenna’s performance. Simultaneous scavenging from different energy sources significantly increases the autonomy of a wearable system, in the meanwhile reducing battery size.
关键词： energy management,energy storage,Energy harvesting,interactive textiles,textile antenna,wearable antenna,smart fabrics
更新于2025-09-23 15:21:01
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Frontiers of Textile Materials (Polymers, Nanomaterials, Enzymes, and Advanced Modification Techniques) || Textiles in Solar Cell Applications
摘要： In previous years, the energy requirement has enhanced dramatically in the world. There are many energy sources have been developed but solar energy is one of the most promising energy techniques. Moreover, the solar energy is a never ending process and has higher potential in the future world. The conventional solar cells array has been commercialized which uses glass fronted panels. However, these kinds of solar cells array are not suitable and require a light weight flexible solar cell generator/substrates. Textiles are the most suitable candidate for their potential applications in solar cells. Textiles based solar cells could be developed for flexible and wearable purposes. In this chapter, we have discussed the properties of textiles, general principle of solar cells and fabrication of textiles based solar cells. This chapter also complied and discussed the recent advancement in the development of solar cells using textiles.
关键词： solar cells,Textiles,photovoltaics,electrode substrates
更新于2025-09-23 15:21:01
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Development of three-dimensional effects and stretch for polymeric optical fiber (POF) textiles with double weave structure containing spandex
摘要： This paper introduces a weaving method to develop three-dimensional and stretchable polymeric optical fiber (POF) fabrics with double weave. It was discovered from the literature that the appearance and property of existing POF textiles are still quite limited. So far, stretch performance has not been realized for POF textiles. The goal of this paper is to determine the design parameters of creating three-dimensional and stretchable POF textiles. The new properties for POF textiles were realized by combing double weave and elastic yarns with suitable motifs. The surface dimension and stretch were compared for eight POF samples . From the experimental results, it was shown that the POF fabrics woven with the unstitched double weave at substantial transverse areas exhibited the most effective three-dimensional effect and stretch. The POF samples created in this study showcased the characteristics of dimensional surface, great volume, high stretch, as well as unique luminous effects.
关键词： POF textiles,three-dimensional effect,stretch behavior,Double weave,spandex
更新于2025-09-23 15:21:01
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Recent Advances in Fiber-Shaped and Planar-Shaped Textile Solar Cells
摘要： During the last few years, textile solar cells with planar and fiber-shaped configurations have attracted enormous research interest. These flexible-type solar cells have a huge potential applicability in self-powered and battery-less electronics, which will impact many sectors, and particularly the Internet of Things. Textile solar cells are lightweight, super-flexible, formable, and foldable. Thus, they could be ideal power-harvester alternatives to common flexible solar cells required in smart textiles, electronic textiles, and wearable electronic devices. This review presents a brief overview on fiber-shaped and planar-shaped solar cells, and it introduces the most recent research reports on the different types of textile solar cells, including details on their fabrication techniques. It also addresses the current challenges and limitations of their technology development, and the encountered issues for their future application and integration in novel devices.
关键词： Electronic textiles,Smart textiles,Textile solar cells,Power harvesting,Fiber-shaped solar cells,Wearable electronic devices
更新于2025-09-23 15:19:57
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A photovoltaic textile design with a stainless steel mesh fabric
摘要： Solar energy is one of the most popular energy sources among the other renewable energies. Photovoltaic technology is a clean way to generate electricity from sunlight. Flexible photovoltaics enable portable electronic devices to power at off-grid conditions. Stainless steel mesh fabric was used as a substrate and electrode allowing the light to reach the photoactive layer. The photoactive layer and hole transport layer were deposited by the means of dip-coating like in the textile industry. The metal back electrode was evaporated in a thermal evaporator under vacuum. Promising results were obtained from photovoltaic measurements. About 0.69% power conversion efficiency was obtained from textile-based solar cells in this study. The textile-based metal fabric enables a flexible photovoltaic structure that can be integrated on non-planar surfaces to generate electricity, and also mesh structure allows the light to reach the photoactive layer.
关键词： solar textiles,conductive fabric,flexible photovoltaics,organic photovoltaics,Wearable electronics
更新于2025-09-23 15:19:57
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[IEEE 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Munich, Germany (2019.6.23-2019.6.27)] 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Tm-Doping Concentration Influence on Tm:GGAG Lasing and Tenability at 2 ??m Spectral Region
摘要： Smart-fabric interactive-textile systems offer exciting new possibilities, provided that they exhibit sufficient robustness and autonomy to be reliably deployed in critical applications. Textile multiantenna systems, unobtrusively integrated in a professional garment, are key components of such systems, as they set up energy-efficient and stable wireless body-centric communication links. Yet, their functionality may be further extended by exploiting their surface as energy-harvesting platform. Different state-of-the-art energy harvesters are suitable for compact integration onto a textile antenna. We demonstrate this by integrating a power management system, together with multiple diverse scavenging transducers and a storage module, on a well-chosen textile antenna topology. We provide guidelines to ensure that the additional hardware does not affect the textile antenna’s performance. Simultaneous scavenging from different energy sources significantly increases the autonomy of a wearable system, in the meanwhile reducing battery size.
关键词： smart fabrics,Energy harvesting,energy storage,textile antenna,interactive textiles,wearable antenna,energy management
更新于2025-09-23 15:19:57
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Purification of Methylene Blue via Photocatalytic Nanofibrous Membranes Containing TiO <sub/>2</sub> Nanoparticles
摘要： In this paper, titanium dioxide nanoparticles were synthesized and deposited on polyacrylonitrile nanofiber membranes via a sol-gel process. Filter structure consisted of a non-woven polyurethane-carbon substrate, polyacrylonitrile nanofiber and titanium dioxide nanoparticles. The concentration of methylene blue dye solution was measured via UV radiation. The filtration efficiency was calculated via Langmuir-Hinshelwood pseudo-first order equations. The results showed that the filtration efficiency of samples using titanium dioxide under UV rays was higher than those without titanium dioxide and UV rays in both immersing and cross-flow processes. Degradation efficiency of the cross-flow system was three times higher than that of immersing method. In the cross-flow process, the effect of three variables- pressure on the membrane, initial concentration of dye solution and pH of the dye solution was studied under UV rays. The highest efficiency obtained was 90.3% by using 1.5 bar pressure, 40 μM initial concentration and pH of 4.1.
关键词： catalysts,fibers,methylene blue,degradation,textiles,membranes
更新于2025-09-19 17:15:36