Conductive carbon fabric generation from single-step upcycling of textile waste

Abstract

Environmental impacts from the fashion industry are at the top of global pollution. Fiber’s production, fabric preparation and distribution, and disposal of textiles, combined with the excessive consumerism of clothing, result in the wastage of thousands of million cubic meters of fresh water, the release of gigatons of CO2 equivalent, and tenths of million metric tons of textile waste generation every year. This situation evidences that there is an urgent and mandatory need to change the fashion paradigm, but, even if accomplished, the current textile waste spread worldwide still needs to be managed in an environmentally conscious way. Upcycling textile waste by pyrolisis is gaining interest as an alternative management option. The goal is to endow waste with new functionalities for its repurpose into new applications. This study focuses on applying pyrolysis to convert discarded clothing into a conductive carbon textile while avoiding treatments with hazardous chemicals. Envisioned to be applied for current collection in all-organic primary power sources, the ultimate goal is to replace synthetic polymers in commercial carbon current collectors. Actual textile waste has been successfully pyrolyzed without the need of pre-treatments nor activation. The structural composition of the samples was studied by SEM, X-ray diffraction, Raman spectroscopy, ATR-FTIR spectroscopy, EDS and BET surface area. Electrical and electrochemical characterization showed their suitability as current collectors, which was demonstrated by building an aqueous metal-free organic primary battery. A system of innocuous quinone-based redox chemistry coupled with the revalorized collectors delivered 11.17 mA·cm-2 and 1.4 mW·cm-2 of power density, proving the feasibility of the proposed application.