Green DNA-based flame retardant coatings assembled through Layer by Layer

Carosio, Federico; Blasio, Alessandro Di; Alongi, Jenny; Malucelli, Giulio

doi:10.1016/j.polymer.2013.07.029

Cited by 192 publications

(97 citation statements)

References 33 publications

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“…DNA (negatively charged) was combined with chitosan layers (positively charged) on cotton, thus obtaining up to 20 bilayers [111]. In the presence of chitosan, DNA layers were found to favor the char-forming character of chitosan.…”

Section: Intumescent Lbl Coatingsmentioning

confidence: 99%

Surface-Engineered Fire Protective Coatings for Fabrics through Sol-Gel and Layer-by-Layer Methods: An Overview

Malucelli

2016

Coatings

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Fabric flammability is a surface-confined phenomenon: in fact, the fabric surface represents the most critical region, through which the mass and heat transfers, responsible for fueling the flame, are controlled and exchanged with the surroundings. More specifically, the heat the fabric surface is exposed to is transferred to the bulk, from which volatile products of thermal degradation diffuse toward the surface and the gas phase, hence feeding the flame. As a consequence, the chemical and physical characteristics of the fabric surface considerably affect the ignition and combustion processes, as the surface influences the flux of combustible volatile products toward the gas phase. In this context, it is possible to significantly modify (and improve) the fire performance of textile materials by "simply" tailoring their surface: currently, one of the most effective approaches exploits the deposition of tailored coatings able to slow down the heat and mass transfer phenomena occurring during the fire stages. This paper reviews the current state of the art related to the design of inorganic, hybrid, or organic flame-retardant coatings suitable for the fire protection of different fabric substrates (particularly referring to cotton, polyester, and their blends). More specifically, the use of sol-gel and layer-by-layer (LbL) methods is thoroughly discussed; then, some recent examples of flame retardant coatings are presented, showing their potential advances and their current limitations.

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Section: Intumescent Lbl Coatingsmentioning

confidence: 99%

Surface-Engineered Fire Protective Coatings for Fabrics through Sol-Gel and Layer-by-Layer Methods: An Overview

Malucelli

2016

Coatings

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“…Recently, LbL has been used to assembly eco-friendly flame retardants on fabrics (Alongi, Carletto et al, 2013;Alongi, Carosio, Frache, & Malucelli, 2013;Carosio, Di Blasio, Alongi, & Malucelli, 2013;Yang, Cao, Wang, & Schiraldi, 2015). Through alternating deposition of oppositely charged polyelectrolytes, cotton fabrics, ramie fabrics and PET fabrics were coated in a control way (Carosio et al, 2011a;Carosio, Alongi, & Malucelli, 2012;Chang, Slopek, Condon, & Grunlan, 2014;Leistner, Abu-Odeh, Rohmer, & Grunlan, 2015;Li, Mannen et al, 2011;Pan et al, 2015;Zhang, Yan, Peng et al, 2013;.…”

Section: Introductionmentioning

confidence: 99%

Flame retardation of cellulose-rich fabrics via a simplified layer-by-layer assembly

Yang

Wang

Deng

et al. 2016

Carbohydrate Polymers

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“…DNA was then combined with chitosan for building-up Layer by Layer assemblies on cotton fabrics [15]. More specifically, 5, 10 and 20 DNA/chitosan bi-layers were applied to cotton fabrics reaching a total dry mass gain of 2,5, 7 and 14wt.-%, respectively: despite the very thin morphology of the deposited assemblies, the 20 bi-layer coatings were capable of reaching the self-extinction of cotton during horizontal flammability tests, increasing the limit oxygen index up to 24% and reducing the heat release rate by 40% during cone calorimetry tests (35 kW/m 2 ).…”

Section: Introductionmentioning

confidence: 99%

DNA coatings on cotton fabrics: Effect of molecular size and pH on flame retardancy

Bosco

Casale

Mollea

et al. 2015

Surface and Coatings Technology

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Deoxyribonucleic acid (DNA) has been mostly considered as a carrier of genetic information and gene expression. Recently, we have demonstrated that this biomacromolecule is very effective in providing cellulosic fabrics with flame retardant features, thanks to its intrinsic intumescent-like behaviour. Here, we have investigated the role played by different parameters on the overall flame retardant features: DNA molecular size, pH of the DNA aqueous solutions, and number of impregnations. For this purpose, herring DNA, at three different molecular sizes, low (100-200 base pairs, bp), medium (400-800 bp) and high (2000-10000 bp), has been selected as model biomacromolecule; its effect as fire protective coating on cotton fabrics has been assessed in terms of resistance to a flame application (through horizontal flame spread tests) and to an irradiative heat flux of 35kW/m 2 (by cone calorimetry). Furthermore, thermogravimetric analyses have been exploited for evaluating thermal and thermo-oxidative stability of the treated fabrics. *Manuscript Click here to view linked References 2The results clearly indicate that, despite a similar composition, the coatings containing low molecular size DNA exert a superior fire protection on the fabric substrate, as clearly indicated by horizontal flame spread and cone calorimetry tests. Multiple impregnation treatment turned out to be more performing than the single one, being equal the final add-on achieved. More specifically, the use of multiple impregnations at pH=4 and 8 allowed achieving self-extinction for 86 and 74%of the tested samples; in addition, 45 and 25% reductions of total heat release and heat release rate peak under 35 kW/m 2 have been found with respect to untreated cotton. These findings may be attributed to themorphology of the low molecular size DNA coating, which shows a greater penetration into the microfibrillar surfaces of the component fibres within the fabric and to its higher thermal stability in air.

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Green DNA-based flame retardant coatings assembled through Layer by Layer

Cited by 192 publications

References 33 publications

Surface-Engineered Fire Protective Coatings for Fabrics through Sol-Gel and Layer-by-Layer Methods: An Overview

Surface-Engineered Fire Protective Coatings for Fabrics through Sol-Gel and Layer-by-Layer Methods: An Overview

Flame retardation of cellulose-rich fabrics via a simplified layer-by-layer assembly

DNA coatings on cotton fabrics: Effect of molecular size and pH on flame retardancy

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