Abstract Conveyor fused deposition modelling (CFDM) 3D printing of graphene (GR)/polylactic acid (PLA) composite filament offers a unique capability to manufacture tailorable honeycomb structures which can be designed and optimized for specific applications. Among the various filaments that used printing, PLA, carbon black (CB)/PLA, GR/PLA were collected then examined by differential scanning calorimetry (DSC), thermal gravity analysis (TGA), Raman spectra. A stereolithography (STL) file...

Abstract An electro-conductive para-aramid knit was manufactured by a dip-coating in graphene/waterborne polyurethane(WPU) composite for confirming to use as fabric heating element applicable protective clothing requiring durability. The dipped 8 wt% graphene/WPU solution up five-coat cycles. As result of textile number cycles, the electrical, and specifically electrical performances were increased cycles from one five. sample with best performance sample, improve those properties it...

Abstract A basic study was conducted to manufacture conductive composite threads for use in textile-type electrodes and circuits smartwear that can be sewn, embroidered, knitted. The two-types of poly(ethylene terephthalate(PET) filament with a circular cross-section(SD), an oval cross-section curved surface(DT), the yarn selected as silver-coated polyamide(AP). samples were produced two-ply PET first twist, then using AP second both processes applied 100, 200, 500, 1,000 TPM. As number...

This study has investigated the physical properties of 3D-printable shape memory thermoplastic polyurethane (SMTPU) filament and its 3D-printed sinusoidal pattern obtained by fused deposition modeling (FDM) technology. To investigate 3D filaments, (TPU) SMTPU were examined conducting infrared spectroscopy, x-ray diffraction (XRD), dynamic mechanical thermal analysis (DMTA), differential scanning calorimetry (DSC) a tensile test. Then, to examine samples, was developed 3D-printed. Those...

The interest in wearable devices has expanded to measurement for building IoT-based mobile healthcare systems and sensing bio-signal data through clothing. Surface electromyography, called sEMG, is one of the most popular bio-signals that can be applied health monitoring systems. In general, gel-based (Ag/AgCl) electrodes are mainly used, but there problems, such as skin irritation due long-time wearing, deterioration adhesion moisture or sweat, low applicability clothes. Hence, research on...

Abstract This study fabricated and evaluated the textile-type electrodes for application to smartwear that can measure surface electromyography(sEMG). It was manufactured by lock stitch(LS) moss stitch(MS), stitch distance prepared as 1, 2, or 3 mm. The compression property measured using Kawabata evaluation system, sheet resistance skin-electrode impedance were analyzed. coefficient of friction(MIU) MS larger than LS. On other hand, geometrical roughness(SMD) showed a smaller value. When...

Abstract Fabric heating elements with carbon nanofiber (CNF)/Poly(vinylidene fluoride- co -hexafluoropropylene) (PVDF-HFP) composite coated cotton fabrics were prepared various circuit patterns the aim of providing more flexible and uniform performance compared to conventional fabric elements. To investigate properties element according pattern condition, consisting 3, 5, 7 horizontal lines, i.e., P3, P5 P7, respectively used; subsequently, vertical lines added 2P3, 2P5 2P7, respectively. P0...

To investigate the electrical heating performance of two types electro-circuit patterns, stripe-pattern (SP) and horseshoe-pattern (HP) were designed by using graphene/poly(vinylidene fluoride- co-hexafluoropropylene) composites to fabricate textiles for inner layers clothing gloves maintain body temperature. confirm properties pattern shape area coated circuit, surface resistivity SP HP was measured with various sample lengths, namely 100, 75, 50 mm, respectively. The each tends increase...

We prepared a horseshoe-pattern type electrical heating textile that was coated with high graphene nanoplatelet (GNP) content (32 wt% to 64 wt%) of nanoplatelet/poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) composite. Silver-coated conductive yarn is used as electrode in the sample improve its flexibility and applicability wearable textile. These nanoplatelet/PVDF-HFP samples various high-contents were characterized using scanning electron microscopy (SEM), thermogravimetric...

Abstract This study investigated the thermal insulation properties based on electrical heating test of graphene-based multi-layer fabric elements to confirm possibility application for element protective clothing. Four layers were designed as outer, filler, textile, and lining. The outer fabrics used two different densities aramid woven (LD_ARW HD_ARW), an knit (AR_KT), nonwoven (AR_NW). Fabricated graphene/polymer coated textile (GR) exhibits a surface temperature about 85 °C, current 0.12...

Ag/AgCl hydrogel electrodes, which are wet generally used to acquire bio-signals non-invasively. Research concerning dry electrodes is ongoing due the following limitations of electrodes: (1) skin irritation and disease when attached for a long time; (2) poor adhesion sweat; (3) considerable cost disposable use. Accordingly, in film, embroidery, knit forms were manufactured from conductive sheets yarns, typical textile-type electrode materials, using different manufacturing methods...

This study manufactured a horseshoe pattern (HP)-type electrical heating element based on graphene/polylactic acid (GR/PLA) filament using CFDM (conveyor-fused deposition modeling) 3D printing technology, which is new manufacturing process technology. HP was fabricated in the different directions of 0°, 45°, and 90°. To confirm effects directions, morphology, surface resistivity, properties HPs were analyzed. In addition, 3D-printed made printed cotton fabric to their applicability as...

Wearable 2.0 research has been conducted on the manufacture of smart fitness wear that collects bio-signals through wearing a textile-based electrode. Among them, electromyography (EMG) suit measures electrical signals generated by muscles to check their activity, such as contraction and relaxation. General gel-type electrodes have reported cause skin diseases due an uncomfortable feel irritation when attached for long time. Dry various materials are being developed solve this problem....

Abstract This study intended to compare and analyze the Poisson's ratio mechanical properties of aramid knit (ARNT), 3D printed auxetic re-entrant pattern (3DP-RE), 2 types composite fabrics manufactured with ARNT 3DP-RE. Specimens were by printing a CFDM (conveyor fused deposition modeling) printer TPU (thermoplastic polyurethane) filament, combining in ways. Then, ratio, bending, compression, tensile tested. As result 3DP-RE its fabric showed negative at all angles deformed stable 0° 90°...