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Preparation and Flame Retardant Properties of Calcium–Aluminium Hydrotalcite with Root Cutting Silicate Layers as Bamboo Flame Retardants

Authors :
Chungui Du
Qi Li
Shiqin Chen
Hongwei Yu
Chunlin Liu
Yating Hua
Ailian Hu
Yingying Shan
Source :
Materials, Materials; Volume 14; Issue 23; Pages: 7319, Materials, Vol 14, Iss 7319, p 7319 (2021)
Publication Year :
2021
Publisher :
MDPI, 2021.

Abstract

Bamboo has been widely used in architecture, decoration and other fields because of its advantages of short growth period, high strength and degradability. However, bamboo, as a combustible material like wood, are easy to burn and cause building fires. However, the existing bamboo water-based flame retardants have some shortcomings, such as strong hygroscopicity and easy loss, which limits the application of bamboo products. In order to improve the flame retardant performance of bamboo, CaAl-SiO2 layered double hydroxide (LDH) as bamboo flame retardant was synthesised by coprecipitation method. The influence of preparation technology on CaAl–SiO3–LDH structures and properties as well as the flame retardant and smoke suppression characteristics of flame retardant-treated bamboo was discussed. The results revealed that the crystallisation temperature, crystallisation time and crystallisation concentration of CaAl–SiO3–LDHs considerably affected its structure and properties. The optimum technological parameters for preparing CaAl–SiO3–LDHs by using the coprecipitation method are as follows: crystallisation temperature of 100 °C, crystallisation time of 9 h and Ca2+ solution molar concentration of 0.33 mol/L. Compared with nonflame-retardant wood, CaAl–SiO3–LDH flame retardant treatment delayed the peak time of the heat release rate by 20 s and the ignition time by 77.78% and increased the carbon residue rate by 9.54%. This study can provide reference for the research of new flame retardant for bamboo products.

Details

Language :
English
ISSN :
19961944
Volume :
14
Issue :
23
Database :
OpenAIRE
Journal :
Materials
Accession number :
edsair.doi.dedup.....22ece3150c7986013a2105087c8bfd6b