Unsaturated Polyester Resin as a Nonformaldehyde Adhesive Used in Bamboo Particle Boards

Zhenzeng Wu; John Tosin Aladejana; Shuqiong Liu; Xinhuai Gong; Xiaodong Alice Wang; Yongqun Xie

doi:10.1021/acsomega.1c05969

Unsaturated Polyester Resin as a Nonformaldehyde Adhesive Used in Bamboo Particle Boards

ACS Omega. 2022 Jan 18;7(4):3483-3490. doi: 10.1021/acsomega.1c05969. eCollection 2022 Feb 1.

Authors

Zhenzeng Wu¹, John Tosin Aladejana², Shuqiong Liu¹, Xinhuai Gong¹, Xiaodong Alice Wang³, Yongqun Xie²

Affiliations

¹ The College of Ecology and Resource Engineering, Wuyi University, No. 16, Wuyi Avenue, Wuyishan City, Fujian 354300, P.R. China.
² The College of Material Engineering, Fujian Agriculture and Forestry University, 15 Shangxiadian Road, Fuzhou, Fujian 350002, P.R. China.
³ The Department of Wood and Forest Sciences, Laval University, Quebec G1V 0A6, Canada.

Abstract

Unsaturated polyester resin (UPR) with good chemical resistance, excellent mechanical properties, and formaldehyde-free shows great potentials in the wood industry. In this study, the mechanical strength, thermostability, dynamic thermomechanical property, and interfacial bonding of bamboo particle boards (BPBs) made from UPR adhesives with toluene diisocyanate (TDI) as the coupling agent were explored. The results showed that covalent bonds were formed among TDI, bamboo particles, and UPR, which could significantly enhance the mechanical strength. The internal bonding strength, modulus of elasticity, and modulus of rupture of treated BPBs were 1.36, 3010, and 19.6 MPa with the increment of 1250, 514, and 833%, respectively, compared to the control samples. Also, the thickness swelling rate of the BPB was 4.6%, much lower than that of the control, with a decrease of 92%. The thermostability of the treated BPB was also improved. As a result, the BPB using UPR as the adhesive and TDI as the coupling agent shows better usability, higher efficiency, and excellent mechanical strength.