scholarly journals Characterization of Electrical Heating Textile Coated by Graphene Nanoplatelets/PVDF-HFP Composite with Various High Graphene Nanoplatelet Contents

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 928 ◽  
Author(s):  
Hyelim Kim ◽  
Sunhee Lee
Keyword(s):  
Sheet Resistance ◽  
Cotton Fabric ◽  
Electrical Heating ◽  
Coated Sample ◽  
Graphene Nanoplatelet ◽  
Pattern Type ◽  
Heating Performance ◽  
Composite Solution ◽  
Coated Cotton ◽  
Conductive Yarn

We prepared a horseshoe-pattern type electrical heating textile that was coated with high graphene nanoplatelet (GNP) content (32 wt% to 64 wt%) of graphene nanoplatelet/poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) composite. Silver-coated conductive yarn is used as electrode in the sample to improve its flexibility and applicability as wearable textile. These graphene nanoplatelet/PVDF-HFP coated samples with various high-contents of graphene were characterized using scanning electron microscopy (SEM), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), X-ray diffraction (XRD), sheet resistance analysis, and electrical heating performance analysis. Graphene nanoplatelet/PVDF-HFP coated cotton fabric improved the crystallinity and thermal stability with increasing thw high-content of GNP. With an increasing of the high-content of graphene nanoplatelet in the PVDF-HFP composite solution, the sheet resistance of samples tended to gradually decrease. That of, 64 wt% graphene nanoplatelet/PVDF-HFP composite coated sample (64 GR/cotton) was 44 Ω/sq. The electrical heating performance of graphene nanoplatelet/PVDF-HFP composite coated cotton fabric was improved with increasing the high-content of graphene nanoplatelet. When 5 V was applied to 64 GR/cotton, its surface temperature has been indicated to be about 48 °C and it could be used at a low voltage (<10 V). Thus, a horseshoe-pattern type electrical heating textile that is coated by high content of graphene nanoplatelet/PVDF-HFP composite solution sewn with silver-coated conductive yarn is expected to be applied to glove, shoes, jacket, and so on to improve its wearability and applicability.

Electrical heating properties of various electro-circuit patterns coated on cotton fabric using graphene/polymer composites

2019 ◽  
Vol 89 (19-20) ◽  
pp. 4114-4130 ◽  
Author(s):  
Hyelim Kim ◽  
Sunhee Lee
Keyword(s):  
Cotton Fabric ◽  
Vinylidene Fluoride ◽  
Surface Resistivity ◽  
Electrical Heating ◽  
Free Electrons ◽  
Stripe Pattern ◽  
White Zone ◽  
Heating Performance ◽  
Poly Vinylidene Fluoride ◽  
The Difference

To investigate the electrical heating performance of two types of electro-circuit patterns, stripe-pattern (SP) and horseshoe-pattern (HP) types were designed by using graphene/poly(vinylidene fluoride- co-hexafluoropropylene) composites to fabricate electrical heating textiles for the inner layers of clothing and gloves to maintain body temperature. To confirm the electrical properties of the pattern shape and area of the coated circuit, the surface resistivity of SP and HP types was measured with various sample lengths, namely 100, 75, and 50 mm, respectively. The surface resistivity of each sample tends to increase linearly with the increasing size of the coated area. In addition, the surface resistivity of the HP is found to be higher than that of the SP. It could be confirmed that the surface resistivity increases as the curvature increases. For the electrical heating properties of the HP, a white-zone and a red-zone appeared clearly, and locally excess heat appeared at the white-zone; the resistive heat can be explained by the collision of the free electrons in the curved shape of the HP area. In order to confirm the applicability of the fabric heating elements, HP100/cotton, HP75/cotton, and HP50/cotton were fabricated by applying the HP to cotton fabric. The difference of surface temperatures at two points of each line of HP100/cotton, HP75/cotton, and HP50/cotton were about 6.0 ± 2.4℃, 6.8 ± 4.5℃, and 3.5 ± 1.7℃, respectively. It has been confirmed that the heating performance is improved, due to the collision of electrons in the curved region with decreasing HP100/cotton to HP50/cotton ratio, and the white-zone is also increased.

scholarly journals Electrical Heating Performance of Graphene/PLA-Based Various Types of Auxetic Patterns and Its Composite Cotton Fabric Manufactured by CFDM 3D Printer

Polymers ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 2010
Author(s):  
Hyelim Kim ◽  
Sunhee Lee
Keyword(s):  
Surface Temperature ◽  
Cotton Fabric ◽  
Surface Resistivity ◽  
Unit Cell ◽  
Electrical Heating ◽  
Fused Deposition Modelling ◽  
3D Printer ◽  
Heat Distribution ◽  
Fused Deposition ◽  
Heating Performance

To evaluate the electrical heating performance by auxetic pattern, re-entrant honeycomb (RE), chiral truss (CT), honeycomb (HN), and truss (TR), using graphene/PLA (Polylactic acid) filament, were manufactured by CFDM (conveyor fused deposition modelling) 3D printer. In addition, HN and TR, which was indicated to have an excellent electrical heating property, were selected to verify the feasibility of applying fabric heating elements. The result of morphology was that the number of struts constituting the unit cell and the connected points were TR < HN < CT < RE. It was also influenced by the surface resistivity and electrical heating performance. RE, which has the highest number of struts constituting the unit cell and the relative density, had the highest value of surface resistivity, and the lowest value was found in the opposite TR. In the electrical heating performance of samples, the heat distribution of RE was limited even when the applied voltage was increased. However, HN and TR were diffused throughout the sample. In addition, the surface temperature of RE, CT, HN, and TR was about 72.4 °C, 83.1 °C, 94.9 °C, and 85.9, respectively as applied at 30 V. When the HN and TR were printed on cotton fabric, the surface resistivity of HN/cotton and TR/cotton was about 103 Ω/sq, which showed conductive material. The results of electrical heating properties indicated that the heat distribution of HN/cotton showed only in the region where power was supplied, but the TR/cotton was gradually expanded and presented stable electric heating properties. When 30 V was applied, the surface temperature of both samples showed more than 80 °C, and the shape was maintained stably due to the high thermal conductivity of the cotton fabric. Therefore, this study ensured that HN and TR show excellent electrical heating performance among four types of auxetic patterns with continuity.

Cellulose nanocrystal coated cotton fabric with superhydrophobicity for efficient oil/water separation

2018 ◽  
Vol 199 ◽  
pp. 390-396 ◽  
Author(s):  
Quan-Yong Cheng ◽  
Cheng-Shu Guan ◽  
Meng Wang ◽  
Yi-Dong Li ◽  
Jian-Bing Zeng
Keyword(s):  
Cotton Fabric ◽  
Cellulose Nanocrystal ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water ◽  
Coated Cotton

Polypyrrole-coated cotton fabric decorated with silver nanoparticles for the catalytic removal of p-nitrophenol from water

Cellulose ◽  
2018 ◽  
Vol 25 (12) ◽  
pp. 7393-7407 ◽  
Author(s):  
Mohamad M. Ayad ◽  
Wael A. Amer ◽  
Sawsan Zaghlol ◽  
Nela Maráková ◽  
Jaroslav Stejskal
Keyword(s):  
Silver Nanoparticles ◽  
Cotton Fabric ◽  
Catalytic Removal ◽  
Coated Cotton

Layer-by-layer Assembly Polyethylenimine/phytic Acid Coating With Gradient Structure for High-Efficiency and Durable Flame Retardant Cotton Fabric With Good Physical and Mechanical Properties

2021 ◽  
Author(s):  
Xinhua Liu ◽  
Hailong Liu ◽  
Yinchun Fang
Keyword(s):  
Physical Properties ◽  
Flame Retardant ◽  
Cotton Fabric ◽  
High Efficiency ◽  
Cotton Fabrics ◽  
Gradient Structure ◽  
Layer By Layer ◽  
Assembly Method ◽  
Lbl Assembly ◽  
Coated Cotton

Abstract In this study, intumescent flame retardant coating of polyethylenimine/phytic acid (PEI/PA) with gradient structure was constructed on cotton fabric through facile layer-by-layer (LBL) assembly method. The LOI value of coated cotton fabric reached over 40% indicating excellent flame retardancy. Reasonable controlling the LBL assembly process of PEI/PA coating brought less influence to the physical properties of cotton fabrics. And the coated cotton fabric revealed good flame retardant washing durability. Thermogravimetric analysis results of coated cotton fabrics showed that PEI/PA flame retardant coating changed the thermal decomposition process and promoted char formation revealing the obviously condensed phase flame retardant action. SEM images of char residues revealed that PEI/PA flame retardant coating promoted to form the intumescent flame retardant (IFR) char layer showing obvious IFR action. This research provides novel strategy for the development of high-efficiency flame retardant cotton fabric with good durability and physical properties using simple LBL assembly method.

scholarly journals A facile approach to prepare a flexible sandwich-structured supercapacitor with rGO-coated cotton fabric as electrodes

RSC Advances ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 4180-4189 ◽  
Author(s):  
Yuzhou Li ◽  
Yufan Zhang ◽  
Haoran Zhang ◽  
Tie-ling Xing ◽  
Guo-qiang Chen
Keyword(s):  
Cotton Fabric ◽  
Energy Supply ◽  
Electronic Equipment ◽  
Supply Problem ◽  
Wearable Electronic ◽  
Coated Cotton

In recent years, the energy supply problem of wearable electronic equipment has become a topic of increasing concern. In this work, a solid, flexible and symmetrical supercapacitor based on graphene coated cotton fabric was fabricated.

Synthesis of Nontoxic Pyrazolidine-Based Benzoxazine-Coated Cotton Fabric for Oil–Water Separation

2019 ◽  
Vol 58 (47) ◽  
pp. 21419-21430 ◽  
Author(s):  
Manoj Manickam ◽  
Prabunathan Pichaimani ◽  
Hariharan Arumugam ◽  
Alagar Muthukaruppan
Keyword(s):  
Cotton Fabric ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water ◽  
Coated Cotton
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