Eco-friendly biowaste-derived graphitic carbon as black pigment for conductive paint

• Published in: Progress in organic coatings 2020-10, Vol.147, p.105872, Article 105872
• Main Authors: Bhakare, Madhuri A., Wadekar, Pravin H., Khose, Rahul V., Bondarde, Mahesh P., Some, Surajit
• Format: Article
• Language: English
• Subjects: Alkyd resin; Alkyd resins; Antistatics; Bio-waste; Black paint; Carbon; Carbon black; Carbon nanotubes; Circuits; Conductive pigment; Conductivity; Dung; Electromagnetic shielding; Electronic circuits; Energy storage; Flux density; Graphene; Graphitic carbon; Percolation
• ISSN: 0300-9440; 1873-331X
• DOI: 10.1016/j.porgcoat.2020.105872

In this study, we formulated carbon black pigment by using cheap, easily available bio-waste (cow dung). This pigment used in the preparation of conducting paint which showed excellent electrical conductivity may have applications in several fields, such as energy storage devices, antistatic coatings, and electronic circuits. [Display omitted] •The Conductive paint (CP) was prepared by using biowaste i.e. cow dung and alkyd resin.•It showed excellent electrical conductivity ∼ 6.84 × 106 S m−1.•CP showed minimum sheet resistance ∼8.61 × 10−7 Ω sq-1.•CP also showed decent energy storage ability i.e. specific capacitance 216 F g−1 at 1 A g−1 current density.•We applied CP in electronic circuit to check real application of conductivity. In this study, we developed a bio-inspired, eco-friendly, and cost-effective conductive paint (CP). Conventionally, carbon-based black pigment (CBP) was derived from cow dung, which is an eco-friendly, easily available, and inexpensive biowaste material. Subsequently, CP has been prepared using as-prepared CBP. Herein, for the first time, we used CBP as a conductive pigment that was mixed with an air-dried alkyd resin as a binder for paint formulation. As the conductive pigment, the CBP interconnected in the paint matrix by forming percolation pathways; this resulted in excellent conductive behavior of the as-prepared CP. The intermolecular interaction between the alkyd resin and the conductive pigment resulted in a CP that exhibited excellent conductivity as well as energy storage ability. The sheet resistance of the CP, studied using a four-probe resistivity method, was ∼8.61 × 10−7 Ω sq-1. The biowaste-derived CP also exhibited a high specific capacitance of 216 F g-1 and a high energy density of 24 Wh kg-1 at a current density of 1 A g-1. The main advantage of our prepared CP is better conductivity than that of carbon black, graphite, graphene, and carbon nanotube. As a result, the prepared CP may have applications in several fields, such as antistatic coatings, energy storage, electromagnetic shielding, and electronic circuits.