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Improving the Flame Retardant Efficiency of Layer by Layer Coatings Containing Deoxyribonucleic Acid by Post-Diffusion of Hydrotalcite Nanoparticles.
Materials (Basel). 2017 Jun 27; 10(7)M

Abstract

This work deals with the use of hydrotalcite nanoparticle post-diffusion in layer by layer (LbL) coatings with the aim of improving their flame retardant action on cotton. The selected LbL components, which encompass polydiallyldimethylammonium chloride and deoxyribonucleic acid, aim at the deposition of an intumescent coating. Infrared spectra pointed out a super-linear growth of the investigated assembly, indicating the ability to deposit thick coatings while maintaining a relatively low deposition number. A post-diffusion process, performed by exposing the LbL-treated fabrics to two different concentrations of hydrotalcite water suspensions (0.1 or 1 wt %), was carried out to improve the fireproofing efficiency of these coatings. Coatings treated with the lowest concentration suspension partially swelled as a consequence of their structural rearrangements while the use of the highest concentration led to nanoparticle aggregates. Horizontal flame spread tests were used for assessing the achieved flame retardant properties. The post-diffusion performed at the lowest hydrotalcite concentration lowers the minimum number of Bi-Layers required for obtaining cotton self-extinguishment while samples treated with the highest concentration showed detrimental effects on the performances of treated fabrics. This behavior is ascribed to the effects of hydrotalcite particles on the intumescence of LbL coatings, as evidenced by the morphological analyses of post-combustion residues.

Authors+Show Affiliations

Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, Alessandria Campus, Viale Teresa Michel 5, 15121 Alessandria, Italy. federico.carosio@polito.it.Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy. jenny.alongi@unimi.it.Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, Alessandria Campus, Viale Teresa Michel 5, 15121 Alessandria, Italy. chiara.paravidino@studenti.polito.it.Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, Alessandria Campus, Viale Teresa Michel 5, 15121 Alessandria, Italy. alberto.frache@polito.it.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28773071

Citation

Carosio, Federico, et al. "Improving the Flame Retardant Efficiency of Layer By Layer Coatings Containing Deoxyribonucleic Acid By Post-Diffusion of Hydrotalcite Nanoparticles." Materials (Basel, Switzerland), vol. 10, no. 7, 2017.
Carosio F, Alongi J, Paravidino C, et al. Improving the Flame Retardant Efficiency of Layer by Layer Coatings Containing Deoxyribonucleic Acid by Post-Diffusion of Hydrotalcite Nanoparticles. Materials (Basel). 2017;10(7).
Carosio, F., Alongi, J., Paravidino, C., & Frache, A. (2017). Improving the Flame Retardant Efficiency of Layer by Layer Coatings Containing Deoxyribonucleic Acid by Post-Diffusion of Hydrotalcite Nanoparticles. Materials (Basel, Switzerland), 10(7). https://doi.org/10.3390/ma10070709
Carosio F, et al. Improving the Flame Retardant Efficiency of Layer By Layer Coatings Containing Deoxyribonucleic Acid By Post-Diffusion of Hydrotalcite Nanoparticles. Materials (Basel). 2017 Jun 27;10(7) PubMed PMID: 28773071.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Improving the Flame Retardant Efficiency of Layer by Layer Coatings Containing Deoxyribonucleic Acid by Post-Diffusion of Hydrotalcite Nanoparticles. AU - Carosio,Federico, AU - Alongi,Jenny, AU - Paravidino,Chiara, AU - Frache,Alberto, Y1 - 2017/06/27/ PY - 2017/04/29/received PY - 2017/06/18/revised PY - 2017/06/23/accepted PY - 2017/8/5/entrez PY - 2017/8/5/pubmed PY - 2017/8/5/medline KW - combustion KW - cotton KW - flame retardancy KW - hydrotalcite KW - layer by layer KW - nanoparticles JF - Materials (Basel, Switzerland) JO - Materials (Basel) VL - 10 IS - 7 N2 - This work deals with the use of hydrotalcite nanoparticle post-diffusion in layer by layer (LbL) coatings with the aim of improving their flame retardant action on cotton. The selected LbL components, which encompass polydiallyldimethylammonium chloride and deoxyribonucleic acid, aim at the deposition of an intumescent coating. Infrared spectra pointed out a super-linear growth of the investigated assembly, indicating the ability to deposit thick coatings while maintaining a relatively low deposition number. A post-diffusion process, performed by exposing the LbL-treated fabrics to two different concentrations of hydrotalcite water suspensions (0.1 or 1 wt %), was carried out to improve the fireproofing efficiency of these coatings. Coatings treated with the lowest concentration suspension partially swelled as a consequence of their structural rearrangements while the use of the highest concentration led to nanoparticle aggregates. Horizontal flame spread tests were used for assessing the achieved flame retardant properties. The post-diffusion performed at the lowest hydrotalcite concentration lowers the minimum number of Bi-Layers required for obtaining cotton self-extinguishment while samples treated with the highest concentration showed detrimental effects on the performances of treated fabrics. This behavior is ascribed to the effects of hydrotalcite particles on the intumescence of LbL coatings, as evidenced by the morphological analyses of post-combustion residues. SN - 1996-1944 UR - https://www.unboundmedicine.com/medline/citation/28773071/Improving_the_Flame_Retardant_Efficiency_of_Layer_by_Layer_Coatings_Containing_Deoxyribonucleic_Acid_by_Post-Diffusion_of_Hydrotalcite_Nanoparticles L2 - http://www.mdpi.com/resolver?pii=ma10070709 DB - PRIME DP - Unbound Medicine ER -
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