Fabrication and performance evaluation of a novel laminated veneer lumber (LVL) made from hybrid poplar
In this study, a fabrication method for laminated veneer lumber (LVL) was developed. The novel LVL (NLVL) was produced with poplar fibrosis veneers and phenolic formaldehyde. Some tests were conducted to evaluate the properties of the NLVL with different densities (ranging from 0.8 to 1.2 g cm−3), such as mechanical properties, water resistance and surface behavior. As a result of the data obtained from the tests, the mechanical properties and water resistance of the NLVL were observed to be superior to those values of the traditional LVL (TLVL) and could be used as engineering materials. In addition, the density played an important role in improving the properties of the NLVL. It can be concluded that the mechanical properties, surface wettability and roughness improved. Conversely, with regard to the surface energy, the calculations carried out by two models unanimously indicated that the total surface free energy declined dramatically on account of the densification process. Finally, the apertures of vessels and the fiber cells decreased with the density increasing. As a consequence, the penetration routes of moisture into the NLVL reduced significantly and in turn enhanced the water resistance.
Yanan Wei performed the experiments, analyzed the data, and wrote the manuscript; Fei Rao helped Yanan Wei in performing the verification experiments after we received the reviews’ comments. Ruiqing Gao contributed to providing experimental equipment and explaining how to use the equipment; Yanglun Yu reviewed the manuscript; Wenji Yu conceived and designed the experiments; Yuxiang Huang directed test operation during experiment process. The authors appreciate the financial support from the National Key R&D Program of China (2017YFD0601205) and Major Science and Technology Program of Hunan Province (2017NK1010).
Compliance with ethical standards
Conflict of interest
The authors declare no conflict of interest.
- American National Standard ASTM 3501 (2005) Standard test methods for wood-based structural panels in compression. American Society for Testing and Materials, Washington DCGoogle Scholar
- Chinese National Standard GB/T 17657 (2013) Test methods of evaluating the properties of wood-based panels and surface decorated wood-based panels. Standard Administration of China, BeijingGoogle Scholar
- Chinese National Standard GB/T 20241 (2006) Laminated veneer lumber standard. Standard Administration of China, BeijingGoogle Scholar
- Cooke L (2000) Reinforced laminated veneer lumber. United States Patent, patent number 6033754Google Scholar
- Cui J, Huang H, Han S, He Y, Jiang G (2016) Influence of glass fiber implantation on the mechanical properties of poplar laminated veneer lumber. J For Eng 1:40–44Google Scholar
- Gu JY (2012) Adhesives and coatings. China Forestry Press, BeijingGoogle Scholar
- Jakub S, Martino N (2005) Wood surface roughness-what is it. Trees and timber research institute, Ivalsa/Cnr. http://www.boku.ac.at/physik/coste35/Rosenheim/article/art_Sandak_COST_E35_Rosenheim_2005.pdf
- Janssen D, Palma RD, Verlaak S, Heremans P, Dehaen W (2006) Static solvent contact angle measurements, surface free energy and wettability determination of various self-assembled monolayers on silicon dioxide. Thin Solid Films 515:1433–1438. https://doi.org/10.1016/j.tsf.2006.04.006 CrossRefGoogle Scholar
- Kilic Y, Colak M, Baysal E, Burdurlu E (2006) An investigation of some physical and mechanical properties of laminated veneer lumber manufactured from black alder (Alnus glutinosa) glued with polyvinyl acetate and polyurethane adhesives. For Prod J 56:56Google Scholar
- Laufenberg TL, Rowlands RE, Krueger GP (1984) Economic feasibility of synthetic fiber reinforced laminated veneer lumber (LVL). For Prod J 34:15–22Google Scholar
- Onyeagoro GN, Enyiegbulam ME (2012) Physico-mechanical properties of cellulose acetate butyrate/ yellow poplar wood fiber composites as a function of fiber aspect ratio, fiber loading, and fiber acetylation. Int J Basics Appl Sci 1:385–397Google Scholar
- Pu J, Tang RC (2007) Nondestructive evaluation of modulus of elasticity of southern pine LVL: effect of veneer grade and relative humidity. Wood Fiber Sci 29(3):249–263Google Scholar
- Qin T, Yan H (2001) A study on effect of esterification and graft copolymerization process on surface free energy of wood. Sci Silv Sin 37:97–100Google Scholar
- Thiphuong N, Cao Y, Zhou X, Dai Z, Quangtrung N (2016) Effects of plasma treatment on properties of poplar LVL. J For Eng 1:26–30Google Scholar
- Wang J, Guo X, Zhong W, Wang H, Cao P (2015) Evaluation of mechanical properties of reinforced poplar laminated veneer lumber. Bioresources 10(4):7455–7465Google Scholar
- Wu Y, Li X, Zuo Y, Li X, Qing Y, Zhang X (2016) Research status on the utilization of forest and agricultural biomass in inorganic wood-based panel. J For Eng 1:8–15Google Scholar
- Yoshihara H (2011) Bending properties of medium-density fiberboard and plywood obtained by compression bending test. For Prod J 61:56–63Google Scholar
- Zhong W, Wang J, Zheng M, Guo X, Cao P (2015) The mechanical properties of reinforced poplar laminated veneer lumber (LVL). J For Eng 29:93–96Google Scholar