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

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.

2018 ◽  
Vol 199 ◽  
pp. 390-396 ◽  
Author(s):  
Quan-Yong Cheng ◽  
Cheng-Shu Guan ◽  
Meng Wang ◽  
Yi-Dong Li ◽  
Jian-Bing Zeng

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Reza Wahyudi ◽  
Muhammad Ivanto ◽  
Murti Juliandari

Dependence on the provision of electricity using fossil fuels is a major energy supply problem in Indonesia. Therefore, it is necessary to provide new and renewable alternative fuels that are effective, efficient, and environmentally friendly. One of the alternative fuels is bagasse biomass. The purpose of this study was to determine the amount of bagasse produced by sellers of sugarcane juice drink in Pontianak City, in order to determine the estimated value of bagasse. The research method used was direct data collection and laboratory testing . Based on the results of the study, the number of vendors of sugarcane juice beverages producing bagasse was 169. Of this amount, produce bagasse that can reach 1,030.9 kg/day. Based on the test results, the estimated moisture content of bagasse was 3.28%, ash content was 0.77%, and carbon remained at 7.65%. So, if converted with the test results of the calorific value of bagasse and made into briquettes bagasse (bio briquettes), which is 19,648 kJ/kg with a density of 0.416 kg/m3, then converted into a potential calorific value of 242,849,280 J/year.


Cellulose ◽  
2018 ◽  
Vol 25 (12) ◽  
pp. 7393-7407 ◽  
Author(s):  
Mohamad M. Ayad ◽  
Wael A. Amer ◽  
Sawsan Zaghlol ◽  
Nela Maráková ◽  
Jaroslav Stejskal

2021 ◽  
Author(s):  
Xinhua Liu ◽  
Hailong Liu ◽  
Yinchun Fang

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.


Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 928 ◽  
Author(s):  
Hyelim Kim ◽  
Sunhee Lee

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.


2019 ◽  
Vol 58 (47) ◽  
pp. 21419-21430 ◽  
Author(s):  
Manoj Manickam ◽  
Prabunathan Pichaimani ◽  
Hariharan Arumugam ◽  
Alagar Muthukaruppan

2015 ◽  
Vol 173 ◽  
pp. 164-171 ◽  
Author(s):  
Iftikhar Ali Sahito ◽  
Kyung Chul Sun ◽  
Alvira Ayoub Arbab ◽  
Muhammad Bilal Qadir ◽  
Sung Hoon Jeong

Sign in / Sign up

Export Citation Format

Share Document