Influence of different hot-pressing conditions on the performance of eco-friendly jabon plywood bonded with citric acid adhesive. Issue 6 (2nd November 2022)

• Record Type: Journal Article
• Authors: Sutiawan, Jajang; Hermawan, Dede; Massijaya, Muhammad Yusram; Kusumah, Sukma Surya; Lubis, Muhammad Adly Rahandi; Marlina, Resti; Purnomo, Deni; Sulastiningsih, Ignasia Maria
• Is Part Of: Wood material science & engineering. Volume 17:Issue 6(2022)
• Page Start: 400
• Page End: 409
• Publication Date: 2022-11-02
• Subjects: Bio-based adhesive -- citric acid -- eco-friendly composite -- jabon -- plywood; Wood -- Periodicals; Wood products -- Periodicals; Building, Wooden -- Periodicals; 624.184
• DOI: 10.1080/17480272.2021.1884898
• Languages: English
• ISSNs: 1748-0272

Abstract

ABSTRACT: The citric acid (CA)-based adhesive, as a new environment-friendly adhesive, has been developed and used for the manufacturing of plywood to resolve the problem of formaldehyde-based adhesive for human health. The effects of pressing time and temperature on physical and mechanical properties of plywood were examined. Three-layer plywood panels were bonded using CA adhesive with a 134 g/m 2 of single glue spread on White jabon wood veneer. The plywood panels were hot-pressed at 5 MPa with three different pressing temperatures, 180°C, 190°C, 200°C, for 10 min, and also different pressing times, 4, 7, 10 min at 190°C. The physical and mechanical properties, such as moisture content, delamination, and shear strength, were evaluated according to JAS 233:2003. The results show that the plywood with pressing temperature of 190°C for 10 min had lower delamination and greater tensile shear strength than those of other plywood panels. Moreover, some properties of the plywood fulfilled the requirement of JAS 233:2003. Based on the FTIR analysis, citric acid plays an important role in the formation of ester linkages (R-COO-R) via esterification between carboxyl groups of citric acid and hydroxyl groups of White jabon wood veneer, resulting excellent properties of plywood.