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Synergistic Effects and Mechanism of Modified Silica Sol Flame Retardant Systems on Silk Fabric

The nano-silica sol was prepared by sol-gel method, and the boric acid, urea, cyanoguanidine, melamine cyanurate (MCA), 1-hydroxyethane 1,1-diphosphonic acid (HEDP), and 6H-dibenz (C,E) (1,2) oxaphosphorin-6-oxide (DOPO) were added to the silica sol to modify the flame retardant through physical dop...

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Autores principales: Liu, Chun, Xing, Tieling, Wei, Bingju, Chen, Guoqiang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6212991/
https://www.ncbi.nlm.nih.gov/pubmed/30262743
http://dx.doi.org/10.3390/ma11101842
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author Liu, Chun
Xing, Tieling
Wei, Bingju
Chen, Guoqiang
author_facet Liu, Chun
Xing, Tieling
Wei, Bingju
Chen, Guoqiang
author_sort Liu, Chun
collection PubMed
description The nano-silica sol was prepared by sol-gel method, and the boric acid, urea, cyanoguanidine, melamine cyanurate (MCA), 1-hydroxyethane 1,1-diphosphonic acid (HEDP), and 6H-dibenz (C,E) (1,2) oxaphosphorin-6-oxide (DOPO) were added to the silica sol to modify the flame retardant through physical doping and chemical bonding. According to the formula proposed by Lewin, the calculation of flammability parameters were obtained by the limiting oxygen index meter, the micro calorimeter, the vertical burner, and the thermogravimetric analyzer proved that there was a synergistic or additive effect between the B/N/P flame retardant and the silica sol. Fourier transform infrared (FT-IR) spectrum, scanning electron microscopy, and pyrolysis gas chromatography-mass spectrometry were used to characterize the morphology, structure, and pyrolysis products of treated silk fabric and residues after combustion. The results show that the flame retardancy of silica-boron sol is mainly caused by endothermic reaction and melt covering reaction. Silicon-nitrogen sol acts as a flame retardant through endothermic reaction, release of gases, and melting coverage. Silicon-phosphorus sol achieves flame retardancy by forming an acid to promote formation of a carbon layer and melting coverage. Silica sol and other flame retardants show excellent flame retardanty after compounding, and have certain complementarity, which can balance the dosage, performance, and cost of flame retardants, and is more suitable for industrial development.
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spelling pubmed-62129912018-11-14 Synergistic Effects and Mechanism of Modified Silica Sol Flame Retardant Systems on Silk Fabric Liu, Chun Xing, Tieling Wei, Bingju Chen, Guoqiang Materials (Basel) Article The nano-silica sol was prepared by sol-gel method, and the boric acid, urea, cyanoguanidine, melamine cyanurate (MCA), 1-hydroxyethane 1,1-diphosphonic acid (HEDP), and 6H-dibenz (C,E) (1,2) oxaphosphorin-6-oxide (DOPO) were added to the silica sol to modify the flame retardant through physical doping and chemical bonding. According to the formula proposed by Lewin, the calculation of flammability parameters were obtained by the limiting oxygen index meter, the micro calorimeter, the vertical burner, and the thermogravimetric analyzer proved that there was a synergistic or additive effect between the B/N/P flame retardant and the silica sol. Fourier transform infrared (FT-IR) spectrum, scanning electron microscopy, and pyrolysis gas chromatography-mass spectrometry were used to characterize the morphology, structure, and pyrolysis products of treated silk fabric and residues after combustion. The results show that the flame retardancy of silica-boron sol is mainly caused by endothermic reaction and melt covering reaction. Silicon-nitrogen sol acts as a flame retardant through endothermic reaction, release of gases, and melting coverage. Silicon-phosphorus sol achieves flame retardancy by forming an acid to promote formation of a carbon layer and melting coverage. Silica sol and other flame retardants show excellent flame retardanty after compounding, and have certain complementarity, which can balance the dosage, performance, and cost of flame retardants, and is more suitable for industrial development. MDPI 2018-09-27 /pmc/articles/PMC6212991/ /pubmed/30262743 http://dx.doi.org/10.3390/ma11101842 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Liu, Chun
Xing, Tieling
Wei, Bingju
Chen, Guoqiang
Synergistic Effects and Mechanism of Modified Silica Sol Flame Retardant Systems on Silk Fabric
title Synergistic Effects and Mechanism of Modified Silica Sol Flame Retardant Systems on Silk Fabric
title_full Synergistic Effects and Mechanism of Modified Silica Sol Flame Retardant Systems on Silk Fabric
title_fullStr Synergistic Effects and Mechanism of Modified Silica Sol Flame Retardant Systems on Silk Fabric
title_full_unstemmed Synergistic Effects and Mechanism of Modified Silica Sol Flame Retardant Systems on Silk Fabric
title_short Synergistic Effects and Mechanism of Modified Silica Sol Flame Retardant Systems on Silk Fabric
title_sort synergistic effects and mechanism of modified silica sol flame retardant systems on silk fabric
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6212991/
https://www.ncbi.nlm.nih.gov/pubmed/30262743
http://dx.doi.org/10.3390/ma11101842
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AT xingtieling synergisticeffectsandmechanismofmodifiedsilicasolflameretardantsystemsonsilkfabric
AT weibingju synergisticeffectsandmechanismofmodifiedsilicasolflameretardantsystemsonsilkfabric
AT chenguoqiang synergisticeffectsandmechanismofmodifiedsilicasolflameretardantsystemsonsilkfabric