Glycerol/PEDOT:PSS coated woven fabric as a flexible heating element on textiles

Moraes, Maria R.; Alves, Alexandra Manuela Vieira Cruz Pinto; Toptan, Fatih; Martins, M. S.; Vieira, E. M. F.; Paleo, A. J.; Souto, A. Pedro; Santos, Washington Luiz Félix; Esteves, Maria Fátima; Zille, Andrea

doi:10.1039/c7tc00486a

Cited by 71 publications

(39 citation statements)

References 98 publications

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“…Thermogravimetric analysis (TGA) of PEDOT:PSS films (Figure S11, Supporting Information) shows a weight loss in the temperature range 100–365 °C, which is tentatively attributed to the vaporization of volatile species, such as residual water and glycerol. A higher temperature leads to the decomposition of thiophene chains and further weight loss . Overall, these results reveal a higher content of volatile species for films baked at lower temperature, which may also lead to a lower PEDOT:PSS crystallinity .…”

Section: Resultsmentioning

confidence: 75%

Tuning the Electromechanical Properties of PEDOT:PSS Films for Stretchable Transistors And Pressure Sensors

Zhang

Tomasello

et al. 2019

Adv Elect Materials

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Poly(3,4‐ethylenedioxythiophene) doped with polystyrene sulfonate (PEDOT:PSS) based organic electrochemical transistors (OECTs) have been widely applied in bioelectronics because of their low power consumption, biocompatibility, and ability to convert ionic biological signals into electronic signals with high sensitivity. Here, the processing of PEDOT:PSS thin films on soft substrates is reported for stretchable OECT applications. Enhanced stretchability of PEDOT:PSS films on elastic substrates is obtained by synergistically reducing the film thickness and decreasing the baking temperature. The resultant films, together with ultrathin Au electrodes, enable the assembling of fully stretchable OECTs using conventional fabrication techniques, without prestretching the substrates. The stretchable OECTs maintain similar electrical characteristics within 30% applied strain. It is also demonstrated that brittle PEDOT:PSS films, which are not suitable for making stretchable OECTs, can be used for transparent pressure sensors.

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Section: Resultsmentioning

confidence: 75%

Tuning the Electromechanical Properties of PEDOT:PSS Films for Stretchable Transistors And Pressure Sensors

Zhang

Tomasello

et al. 2019

Adv Elect Materials

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“…In contrast to two-dimensional TEGs 38,[40][41][42][43][44][45][46][47][48][49][50][51][52][53][54] performing along in-plane direction, three-dimensional deformable TEGs (3D-TEGs) 34,35,[55][56][57][58][59][60][61][62] with vertical aligned TE units can utmostly utilize the body-environment temperature gradient vertical to body skin direction. In contrast to flexible inorganic TEGs 34,36,41,44,51,56,59,60,62,63 , the soft and skincompatible organic thermoelectric textiles (TETs) 35,38,41,46,50,64 are very promising as well for the out-of-plane thermal energy harvesting, owing to their abundant sources, low density, intrinsic flexibility, processability and conformability with fabrics.…”

Section: Introductionmentioning

confidence: 99%

Carbon nanotube yarn based thermoelectric textiles for harvesting thermal energy and powering electronics

et al. 2020

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Wearable thermoelectric devices show promises to generate electricity in a ubiquitous, unintermittent and noiseless way for on-body applications. Threedimensional thermoelectric textiles (TETs) outperform other types in smart textiles owing to their out-of-plane thermoelectric generation and good structural conformability with fabrics. Yet, there has been lack of efficient strategies in scalable manufacture of TETs for sustainably powering electronics. Here, we fabricate organic spacer fabric shaped TETs by knitting carbon nanotube yarn based segmented thermoelectric yarn in large scale. Combing finite element analysis with experimental evaluation, we elucidate that the fabric structure significantly influences the power generation. The optimally designed TET with good wearability and stability shows high output power density of 51.5 mW/m 2 and high specific power of 173.3 µW/(g·K) at ∆T= 47.5 K. The promising on-body applications of the TET in directly and continuously powering electronics for healthcare and environmental monitoring is fully demonstrated. This work will broaden the research vision and provide new routines for developing high-performance and large-scale TETs toward practical applications.

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“…As referred in Section 2.3.1, the results are expressed as storage (E') and loss (E") moduli, and damping factor (tan∂). A high tan∂ value implies a material with a significant non-elastic strain component and a low value indicates one with a high elastic contribution [57]. The analysis of the tensile loading mode (Figure 9) shows a different behaviour of the NS structure comparatively to compressive loading mode ( Figure 10).…”

Section: Multi-frequency Tensile and Compressive Loading Of Nsmentioning

confidence: 99%

Thermo-Mechanical Behaviour of Human Nasal Cartilage

et al. 2020

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The aim of this study was to undergo a comprehensive analysis of the thermo-mechanical properties of nasal cartilages for the future design of a composite polymeric material to be used in human nose reconstruction surgery. A thermal and dynamic mechanical analysis (DMA) in tension and compression modes within the ranges 1 to 20 Hz and 30 °C to 250 °C was performed on human nasal cartilage. Differential scanning calorimetry (DSC), as well as characterization of the nasal septum (NS), upper lateral cartilages (ULC), and lower lateral cartilages (LLC) reveals the different nature of the binding water inside the studied specimens. Three peaks at 60–80 °C, 100–130 °C, and 200 °C were attributed to melting of the crystalline region of collagen matrix, water evaporation, and the strongly bound non-interstitial water in the cartilage and composite specimens, respectively. Thermogravimetric analysis (TGA) showed that the degradation of cartilage, composite, and subcutaneous tissue of the NS, ULC, and LLC take place in three thermal events (~37 °C, ~189 °C, and ~290 °C) showing that cartilage releases more water and more rapidly than the subcutaneous tissue. The water content of nasal cartilage was estimated to be 42 wt %. The results of the DMA analyses demonstrated that tensile mode is ruled by flow-independent behaviour produced by the time-dependent deformability of the solid cartilage matrix that is strongly frequency-dependent, showing an unstable crystalline region between 80–180 °C, an amorphous region at around 120 °C, and a clear glass transition point at 200 °C (780 kJ/mol). Instead, the unconfined compressive mode is clearly ruled by a flow-dependent process caused by the frictional force of the interstitial fluid that flows within the cartilage matrix resulting in higher stiffness (from 12 MPa at 1 Hz to 16 MPa at 20 Hz in storage modulus). The outcomes of this study will support the development of an artificial material to mimic the thermo-mechanical behaviour of the natural cartilage of the human nose.

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Glycerol/PEDOT:PSS coated woven fabric as a flexible heating element on textiles

Abstract: A cost-competitive, flexible and safe thermoelectric polyamide 6,6 (PA66) fabric coated with glycerol-doped PEDOT:PSS (PEDOT:PSS + GLY) for use in large area textiles as a heating element in several applications.

Cited by 71 publications

References 98 publications

Tuning the Electromechanical Properties of PEDOT:PSS Films for Stretchable Transistors And Pressure Sensors

Tuning the Electromechanical Properties of PEDOT:PSS Films for Stretchable Transistors And Pressure Sensors

Carbon nanotube yarn based thermoelectric textiles for harvesting thermal energy and powering electronics

Thermo-Mechanical Behaviour of Human Nasal Cartilage

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