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- Title
Effect of Basalt Fiber by Alkali Etching on Bonding Properties of Geopolymer-Based Wood Adhesives.
- Authors
DENG Muling; ZHANG Yang; PAN Dawei; YE Hanzhou; ZHANG Na
- Abstract
As a new environment-friendly inorganic cementitious material, the geopolymer has great application potential in wood-based panel industry. However, the high brittleness limits its bonding property with wood. In order to improve the brittleness of geopolymer matrix and enhance its bonding property, alkali etching modification on the basalt fiber (BF) was used in this study. The basalt fiber was first etched by NaOH solution with different concentrations under different temperatures, and then the basalt fiber etched by alkali (HAF) was mixed with alkali activator, after which the geopolymer modified by basalt fiber (HAFMG) was prepared by adding metakaolin. The effect of alkali etching method on the mechanical property of HAFMG as well as bonding strength between HAFMG and wood was explored. The results show that alkali etching dissolves the silicon and aluminum components on the surface of BF, improves the surface roughness of BF and its interface combination with geopolymer matrix, and finally improves the bonding strength between the geopolymer and wood. Compared with the pure geopolymer, the geopolymer with the addition of HAF (100 t, 0.5 mol/L NaOH) has greater toughness. Its flexural strength increases by 154%, and the compression-flexure ratio is reduced by 41 %. In addition, the shear strength of the geopolymer modified by HAF (100 t, 0.5 mol/L NaOH) is 121% higher than that of the pure geopolymer.
- Publication
Bulletin of the Chinese Ceramic Society, 2021, Vol 40, Issue 6, p2062
- ISSN
1001-1625
- Publication type
Academic Journal