胶粘剂体系对亚麻纤维增强山毛榉胶合板力学性能和物理性能的影响

Influence of Adhesive Systems on the Mechanical and Physical Properties of Flax Fiber Reinforced Beech Plywood.

作者信息

Jorda Johannes, Kain Günther, Barbu Marius-Catalin, Petutschnigg Alexander, Král Pavel

机构信息

Forest Products Technology and Timber Construction Department, Salzburg University of Applied Sciences, Markt 136a, 5431 Kuchl, Austria.

Department for Furniture and Interior Design, Higher Technical College Hallstatt, Lahnstraße 69, 4830 Hallstatt, Austria.

出版信息

Polymers (Basel). 2021 Sep 13;13(18):3086. doi: 10.3390/polym13183086.

DOI:10.3390/polym13183086

PMID:34577987

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8469923/

Abstract

In order to improve the acceptance of broader industrial application of flax fiber reinforced beech ( L.) plywood, five different industrial applicated adhesive systems were tested. Epoxy resin, urea-formaldehyde, melamine-urea formaldehyde, isocyanate MDI prepolymer, and polyurethane displayed a divergent picture in improving the mechanical properties-modulus of elasticity, modulus of rupture, tensile strength, shear strength and screw withdrawal resistance-of flax fiber-reinforced plywood. Epoxy resin is well suited for flax fiber reinforcement, whereas urea-formaldehyde, melamine urea-formaldehyde, and isocyanate prepolymer improved modulus of elasticity, modulus of rupture, shear strength, and screw withdrawal resistance, but lowered tensile strength. Polyurethane lowered the mechanical properties of flax fiber reinforced plywood. Flax fiber reinforced epoxy resin bonded plywood exceeded glass fiber reinforced plywood in terms of shear strength, modulus of elasticity, and modulus of rupture.

摘要

为提高亚麻纤维增强山毛榉胶合板在更广泛工业应用中的接受度，测试了五种不同的工业应用胶粘剂体系。环氧树脂、脲醛树脂、三聚氰胺 - 脲醛树脂、异氰酸酯MDI预聚物和聚氨酯在改善亚麻纤维增强胶合板的力学性能（弹性模量、抗弯强度、抗拉强度、抗剪强度和抗螺钉拔出力）方面呈现出不同的情况。环氧树脂非常适合亚麻纤维增强，而脲醛树脂、三聚氰胺 - 脲醛树脂和异氰酸酯预聚物提高了弹性模量、抗弯强度、抗剪强度和抗螺钉拔出力，但降低了抗拉强度。聚氨酯降低了亚麻纤维增强胶合板的力学性能。亚麻纤维增强环氧树脂粘结胶合板在抗剪强度、弹性模量和抗弯强度方面超过了玻璃纤维增强胶合板。