Mechanical and fire properties of oriental beech impregnated with fire-retardants and coated with polyurea/polyurethane hybrid and epoxy resins

IF 1.2 4区农林科学 Q3 MATERIALS SCIENCE, PAPER & WOOD Maderas-ciencia Y Tecnologia Pub Date : 2022-04-01 DOI:10.4067/s0718-221x2022000100423

Ç. Altay, I. Babahan, Halil Kılıç, Hilmi Toker, Ergun Baysal

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引用次数: 2

Abstract

This study was performed to investigate some mechanical properties such as modulus of rupture and compression strength parallel to grain and some fire properties such as weight loss and temperature values of Oriental beech ( Fagus orientalis ) treated with fire-retardants and coated with polyurethane/polyurea hybrid resin and epoxy resin were investigated. The coatings are based on epoxy and polyurethane\polyurea hybrid resins. Firstly, an impregnation method was applied by using fire-retardants which are boron chemicals and ammonium sulfate before coating process. Oriental beech was impregnated with 3 % aqueous solution of boric acid, borax, boric acid and borax mixture (1:1), and ammonium sulfate. Oriental beech was primed with epoxy resin by using Sikafloor ® -156, and then coated with Sikalastic ® -851, a polyurethane/polyurea hybrid resin. Results showed that modulus of rupture and compression strength parallel to grain values of polyurethane/ polyurea and epoxy resin coated Oriental beech wood were higher than that of un-treated and non-coated (control) group. Fire-retardants treatment before polyurethane/polyurea and epoxy resin coatings caused to decrease modulus of rupture and compression strength parallel to grain values of Oriental beech in some extent. Weight loss and temprature values of polyurethane/polyurea and epoxy resin coated Oriental beech were higher than that of un-treated and non-coated (control) group. Hovewer, fire-retardants treatment before polyurethane/polyurea and epoxy resin coatings improved fire properties of Oriental beech wood.

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用聚脲/聚氨酯复合树脂和环氧树脂包覆阻燃剂浸渍东方山毛榉的机械性能和防火性能

研究了经阻燃剂处理、聚氨酯/聚脲复合树脂和环氧树脂包覆的东方山毛榉(Fagus orientalis)的断裂模量和平行于晶粒的抗压强度等力学性能，以及失重和温度值等防火性能。该涂料是基于环氧树脂和聚氨酯/聚脲混合树脂。首先，采用硼系阻燃剂和硫酸铵浸渍法进行涂层前浸渍。用3%硼酸硼砂水溶液、硼酸硼砂混合物(1:1)和硫酸铵浸渍东方山毛榉。东方山毛榉用sikfloor®-156环氧树脂底漆，然后涂上Sikalastic®-851(一种聚氨酯/聚脲混合树脂)。结果表明:经聚氨酯/聚脲和环氧树脂涂层处理的山毛榉木材的断裂模量和抗压强度均高于未处理和未涂层处理的对照组。聚氨酯/聚脲和环氧树脂涂料前的阻燃剂处理在一定程度上造成了与山毛榉颗粒值相似的断裂模量和抗压强度的降低。聚氨酯/聚脲和环氧树脂包覆的山毛榉失重值和温度值均高于未处理和未包覆的山毛榉(对照组)。然而，在聚氨酯/聚脲和环氧树脂涂料之前进行阻燃剂处理可以改善东方山毛榉木的防火性能。

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来源期刊

Maderas-ciencia Y Tecnologia 工程技术-材料科学：纸与木材

CiteScore

2.60

自引率

13.30%

发文量

审稿时长

>12 weeks

期刊介绍： Maderas-Cienc Tecnol publishes inedits and original research articles in Spanish and English. The contributions for their publication should be unpublished and the journal is reserved all the rights of reproduction of the content of the same ones. All the articles are subjected to evaluation to the Publishing Committee or external consultants. At least two reviewers under double blind system. Previous acceptance of the Publishing Committee, summaries of thesis of Magíster and Doctorate are also published, technical opinions, revision of books and reports of congresses, related with the Science and the Technology of the Wood. The journal have not articles processing and submission charges.