Preparation of polyaniline‐poly(ethylene‐vinyl acetate) film: Resistivity in the ESD range

The preparation of polymer/nanoclay nanocomposite has received much attention in recent years from both academic researchers and industry. The addition of nanoclay in polymer matrix could prepare material with improved performance and reduced cost. However, nanocaly is easy to agglomerate resulting in poor dispersion in the matrix. In this work, we proposed the immobilized catalyst prepared by coordination between molybdenum pentachloride (MoCl5) and hydroxyl groups on the nano sepiolite. The obtained sepiolite immobilized catalyst was used for the in situ polymerization of butadiene. The butadiene monomers were diffused into the tiny holes and channels of the sepiolite and sepiolite dispersed uniformly by the effect of in situ polymerization. The immobilization of sepiolite improves the dispersity of MoCl5 during polymerization and further enhances the activity of the catalyst. The coordination between sepiolite and MoCl5 results in a slight drop in vinyl content, and the molecular weight distribution remain unchanged. The flame retardant property of the nanocomposite was further investigated, and the result shows that the addition of sepiolite could increase the Oxygen index. This novel composite with well‐dispersed sepiolite and high content of vinyl can be further applied to flame‐retardant elastic materials.

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Preparation and properties of high vinyl polybutadiene/sepiolite nanocomposites using a sepiolite immobilized Mo‐based catalyst

Deng

Wang

Fang

et al. 2023

“…In this regard, specific requirements of a polymeric electrode should be addressed, such as a high superficial area, which can be improved by modifying the morphology of the electrode. There are several routes for the synthesis of PANI, such as interfacial polymerization, electropolymerization 14 or emulsion polimerization 15 . Nevertheless, these routes imply several steps and produce electrodes with a low superficial area.…”

Section: Introductionmentioning

confidence: 99%

Development of an all‐electrospun high‐performance textile supercapacitor for wearable device applications

Martínez‐Pérez,

Manríquez,

Aldeco‐Pérez

et al. 2023

This paper reports the synthesis and electrochemical performance of electrospun polyaniline (PANI) nanofiber membranes that work as high‐performance electrodes in an all‐textile supercapacitor (SC). The electrospun separator membrane consists of a mix of polyacrylonitrile (PAN) and poly (ethylene sulfonate) (PES). The all‐textile SC consists of a PES‐PAN membrane, previously soaked in an electrolyte, stacked between two PANI fiber electrodes. Scanning electron microscopy and Fourier‐transform infrared spectroscopy are carried out to characterize the morphology and chemical structure of the PANI and PES‐PAN fiber membranes. Cyclic voltammetry, galvanostatic charge–discharge, and electrochemical impedance spectroscopy are carried out to characterize the electrochemical properties of the SCs. The all‐textile SC shows very competitive specific capacitances of 275 F/g at 0.25 A/g and a maximum specific power of 1350 Wkg−1. These all‐electrospun SCs show higher performance than the SCs using PANI films and commercial cellulose as separators. Finally, we report a flexible all‐electrospun and all‐solid‐state SC was fabricated using flexible substrates and a gel‐type electrolyte. Flexible SC has a specific capacitance of 270 F/g, confirming that the performance of all‐electrospun SCs is a promising approach for future textile energy storage devices for its potential use in wearable devices.

Solvothermal synthesis and supercapacitive properties of highly electrochemical stable covalent organic frameworks with triazine building block

Guo

Zhao

et al. 2023

Supercapacitors have been widely studied as a typical representative of new energy storage systems. As a type of novel crystalline porous material, covalent triazine frameworks (CTFs) have attracted enormous attention owing to their high nitrogen content and unique triazine ring structure, which give them high chemical and thermal stability. In this paper, 2,4,6‐tris(4‐aldophenyl)‐1,3,5‐triazine (TFPT) and 2,4,6‐tris(4‐aminophenyl)‐1,3,5‐triazine (TAPT) were used to synthesize TPT‐CTFs by Schiff base reaction. TPT‐CTFs exhibit regular nanosheets structure and high crystallinity. The specific capacitance of TPT‐CTFs is 110 F/g at current density of 0.1 A/g. After 10,000 cycles of charge and discharge, the capacitance retention rate is high as 105%, due to the high crystallinity support and expandable channels of TPT‐CTFs. In addition, the simple and convenient one‐pot hydrothermal synthesis used in this paper, avoids harsh conditions of common ampoule methods for synthesis of CTFs materials.