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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Environmentally Friendly, High-Performance Fire Retardant Made from Cellulose and Graphite

Full text
Author(s):
Santos, Leandra P. [1] ; da Silva, Douglas S. [2] ; Morari, Thais H. [1] ; Galembeck, Fernando [1, 2]
Total Authors: 4
Affiliation:
[1] Galembetech Consultores & Tecnol Ltda, BR-13080661 Campinas - Brazil
[2] Univ Estadual Campinas, Inst Chem, Dept Phys Chem, BR-13083970 Campinas - Brazil
Total Affiliations: 2
Document type: Journal article
Source: POLYMERS; v. 13, n. 15 AUG 2021.
Web of Science Citations: 0
Abstract

Many materials and additives perform well as fire retardants and suppressants, but there is an ever-growing list of unfulfilled demands requiring new developments. This work explores the outstanding dispersant and adhesive performances of cellulose to create a new effective fire-retardant: exfoliated and reassembled graphite (ERG). This is a new 2D polyfunctional material formed by drying aqueous dispersions of graphite and cellulose on wood, canvas, and other lignocellulosic materials, thus producing adherent layers that reduce the damage caused by a flame to the substrates. Visual observation, thermal images and surface temperature measurements reveal fast heat transfer away from the flamed spots, suppressing flare formation. Pinewood coated with ERG underwent standard flame resistance tests in an accredited laboratory, reaching the highest possible class for combustible substrates. The fire-retardant performance of ERG derives from its thermal stability in air and from its ability to transfer heat to the environment, by conduction and radiation. This new material may thus lead a new class of flame-retardant coatings based on a hitherto unexplored mechanism for fire retardation and showing several technical advantages: the precursor dispersions are water-based, the raw materials used are commodities, and the production process can be performed on commonly used equipment with minimal waste. (AU)

FAPESP's process: 19/04565-9 - Conductive inks, adhesives and coatings made with exfoliated graphite, applied to making electrical components and circuits
Grantee:Leandra Pereira dos Santos
Support type: Scholarships in Brazil - Innovative Research in Small Business - PIPE
FAPESP's process: 14/50906-9 - INCT 2014: in Functional Complex Materials
Grantee:Fernando Galembeck
Support type: Research Projects - Thematic Grants
FAPESP's process: 18/00834-2 - Conductive inks, adhesives and coatings made with exfoliated graphite, applied to making electrical components and circuits
Grantee:Fernando Galembeck
Support type: Research Grants - Innovative Research in Small Business - PIPE
FAPESP's process: 19/02654-4 - Capacitation in conductive paint fabrication process and characterization
Grantee:Thais Helena Morari
Support type: Scholarships in Brazil - Technical Training Program - Technical Training