一种完全基于生物的大豆蛋白木材胶粘剂，经过柠檬酸改性，具有高耐水性。

A fully bio-based soy protein wood adhesive modified by citric acid with high water tolerance.

机构信息

Yunnan Key Laboratory of Wood Adhesives and Glued Products, College of Material and Chemical Engineering, Southwest Forestry University, Kunming 650224, China.

出版信息

Int J Biol Macromol. 2023 Dec 31;253(Pt 6):127135. doi: 10.1016/j.ijbiomac.2023.127135. Epub 2023 Oct 5.

DOI:10.1016/j.ijbiomac.2023.127135

PMID:37802444

Abstract

Despite the widespread application prospect of soybean meal flour (SF) as a non-toxic and renewable wood adhesive, the practical application is limited by its poor mechanical properties and water resistance. In this work, a novel SF-based wood adhesive (CSP) was developed using citric acid (CA) as a modifier, which was further designated to produce plywood on a laboratory scale. Moreover, the effects of the mass ratio of CA/SF, hot-pressing temperature, and hot-pressing time on the bonding properties and water resistance of the resulting plywood were investigated in detail. As a result, under the optimal hot-pressing conditions (180 °C, 5 min), high-performance plywood bonded by CSP (CA/SF = 15/100) adhesive was fabricated, whose dry shear strength, cold-water wet shear strength (20 °C for 24 h), and hot-water wet shear strength (63 °C for 3 h) reached 1.65 MPa, 1.99 MPa, and 1.58 MPa, respectively. Due to the easy preparation process, sustainability, and favorable properties, the proposed fully bio-based CSP wood adhesive has great potential for the large-scale fabrication of eco-friendly wood panels in industry.

摘要

尽管大豆粉 (SF) 作为一种无毒且可再生的木材胶粘剂具有广泛的应用前景，但由于其机械性能和耐水性差，实际应用受到限制。在这项工作中，使用柠檬酸 (CA) 作为改性剂开发了一种新型的基于 SF 的木材胶粘剂 (CSP)，并进一步指定在实验室规模上生产胶合板。此外，详细研究了 CA/SF 质量比、热压温度和热压时间对所得胶合板的胶合性能和耐水性的影响。结果表明，在最佳热压条件（180°C，5 分钟）下，用 CSP（CA/SF=15/100）胶粘剂制备的高性能胶合板，其干剪切强度、冷水湿剪切强度（20°C 24 小时）和热水湿剪切强度（63°C 3 小时）分别达到 1.65 MPa、1.99 MPa 和 1.58 MPa。由于制备工艺简单、可持续性和良好的性能，所提出的完全基于生物的 CSP 木材胶粘剂具有在工业中大规模制造环保型人造板的巨大潜力。