The effect of diammonium phosphate and sodium silicate on the adhesion and fire properties of birch veneer

Tutkimustuotos: Lehtiartikkeli

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@article{305137163ca342a0b0280935a5175a10,
title = "The effect of diammonium phosphate and sodium silicate on the adhesion and fire properties of birch veneer",
abstract = "In built environments the combustibility of wood is a great concern, which limits the use of wood as a building material due to legislation. The reaction-to-fire properties of wood can be altered with the use of fire-retardant chemicals, and most of the commonly used fire retardants already have a long history of use. However, only limited information is available on the impact of different fire retardants on the adhesion properties of wood. Additionally, comparative studies between chemicals from different groups of fire retardants is scarce. The objective of this study was to investigate and compare the effects of twocommonly used fire retardants, sodium silicate (SS) and diammonium phosphate (DAP), on veneer properties, the focus being especially on thermal behavior and adhesion. Thermal properties and combustibility were studied usingthermogravimetric analysis (TGA), flame test and calorimetry. Glue bond strength was analyzed with an automated bonding evaluation system (ABES) and the leaching of chemicals was determined according to EN84. Additionally, the surface characteristics of modified veneers were imaged with scanning electron microscopy (SEM). Results revealed notable differences in the thermal properties of SS and DAP, with DAP having better fire-retardant performance in all thermal testing. SS also affected thermal properties and combustibility of modified veneers, but the effect was only moderate compared to DAP. Neither SS or DAP had any significant resistance against leaching but ABES testing showed a notable increase in the glue bond strength of DAP modified veneers.",
keywords = "adhesion, diammonium phosphate, fire retardant chemicals, sodium silicate, wood combustion",
author = "Saara Hautam{\"a}ki and Michael Altgen and Daniela Altgen and Erik Larn{\o}y and Tuomas H{\"a}nninen and Lauri Rautkari",
year = "2019",
doi = "10.1515/hf-2019-0059",
language = "English",
journal = "Holzforschung",
issn = "0018-3830",
publisher = "Walter De Gruyter",

}

RIS - Lataa

TY - JOUR

T1 - The effect of diammonium phosphate and sodium silicate on the adhesion and fire properties of birch veneer

AU - Hautamäki, Saara

AU - Altgen, Michael

AU - Altgen, Daniela

AU - Larnøy, Erik

AU - Hänninen, Tuomas

AU - Rautkari, Lauri

PY - 2019

Y1 - 2019

N2 - In built environments the combustibility of wood is a great concern, which limits the use of wood as a building material due to legislation. The reaction-to-fire properties of wood can be altered with the use of fire-retardant chemicals, and most of the commonly used fire retardants already have a long history of use. However, only limited information is available on the impact of different fire retardants on the adhesion properties of wood. Additionally, comparative studies between chemicals from different groups of fire retardants is scarce. The objective of this study was to investigate and compare the effects of twocommonly used fire retardants, sodium silicate (SS) and diammonium phosphate (DAP), on veneer properties, the focus being especially on thermal behavior and adhesion. Thermal properties and combustibility were studied usingthermogravimetric analysis (TGA), flame test and calorimetry. Glue bond strength was analyzed with an automated bonding evaluation system (ABES) and the leaching of chemicals was determined according to EN84. Additionally, the surface characteristics of modified veneers were imaged with scanning electron microscopy (SEM). Results revealed notable differences in the thermal properties of SS and DAP, with DAP having better fire-retardant performance in all thermal testing. SS also affected thermal properties and combustibility of modified veneers, but the effect was only moderate compared to DAP. Neither SS or DAP had any significant resistance against leaching but ABES testing showed a notable increase in the glue bond strength of DAP modified veneers.

AB - In built environments the combustibility of wood is a great concern, which limits the use of wood as a building material due to legislation. The reaction-to-fire properties of wood can be altered with the use of fire-retardant chemicals, and most of the commonly used fire retardants already have a long history of use. However, only limited information is available on the impact of different fire retardants on the adhesion properties of wood. Additionally, comparative studies between chemicals from different groups of fire retardants is scarce. The objective of this study was to investigate and compare the effects of twocommonly used fire retardants, sodium silicate (SS) and diammonium phosphate (DAP), on veneer properties, the focus being especially on thermal behavior and adhesion. Thermal properties and combustibility were studied usingthermogravimetric analysis (TGA), flame test and calorimetry. Glue bond strength was analyzed with an automated bonding evaluation system (ABES) and the leaching of chemicals was determined according to EN84. Additionally, the surface characteristics of modified veneers were imaged with scanning electron microscopy (SEM). Results revealed notable differences in the thermal properties of SS and DAP, with DAP having better fire-retardant performance in all thermal testing. SS also affected thermal properties and combustibility of modified veneers, but the effect was only moderate compared to DAP. Neither SS or DAP had any significant resistance against leaching but ABES testing showed a notable increase in the glue bond strength of DAP modified veneers.

KW - adhesion

KW - diammonium phosphate

KW - fire retardant chemicals

KW - sodium silicate

KW - wood combustion

U2 - 10.1515/hf-2019-0059

DO - 10.1515/hf-2019-0059

M3 - Article

JO - Holzforschung

JF - Holzforschung

SN - 0018-3830

ER -

ID: 37082139