• Kong Yue Nanjing Tech University State Key Laboratory of Molecular Engineering of Polymers (Fudan University) http://orcid.org/0000-0002-3039-638X
  • Lu Wang Nanjing Tech University
  • Jiao Xia Beijing Lucency Enviro-tech Co. Ltd., Nanjing Branch
  • Yulong Zhang Beijing Lucency Enviro-tech Co. Ltd., Nanjing Branch
  • Zhangjing Chen Virginia Tech University
  • Weiqing Liu Nanjing Tech University


wood plastic composites, laminating configuration, interface, mechanical properties, bonding performance


In this study, to improve the structural applications of wood plastic composite (WPC) according to its relatively lower MOE, wood veneer and plastic sheets were laminated to form laminated WPC (LWPC). Bonding performance tests were conducted to determine the effects of coupling agent and processing on bonding performance between wood and plastic, followed by mechanical properties tests. The bondlines between wood and plastic were examined using scanning electron microscopy (SEM). The results showed the following. 1) Delamination of untreated LWPCs was converted into wood fracture by adding a coupling agent. 2) The bending strength and tensile strength are both higher than those of the conventional WPCs, and the MOE of parallel multilayered LWPCs was significantly increased. The parallel multilayered LWPC with a density of 0.6 g/cm3 and wood-to-plastic ratio of 3:1 had an MOE of 11,490 MPa, and the bending and tensile strength were 40.36 MPa and 31.47 MPa, respectively. 3) SEM indicated that a strong interfacial connection in LWPC was obtained. This study demonstrated that the configuration of LWPC in combination with laminated veneer lumber and conventional WPC technologies is an effective method to improve mechanical properties. The LWPC can be used as a load-bearing material in timber structure.

Author Biographies

Kong Yue, Nanjing Tech University State Key Laboratory of Molecular Engineering of Polymers (Fudan University)

College of Civil Engineering

Lu Wang, Nanjing Tech University

College of Civil Engineering

Zhangjing Chen, Virginia Tech University

Department of Sustainable Biomaterials

Weiqing Liu, Nanjing Tech University

College of Civil Engineering


Abdelmouleh M, Boufi S, Belgacem MN, Dufresne A (2007)

Short natural-fibre reinforced polyethylene and natural

rubber composites: Effect of silane coupling agents and

fibre loading. Compos Sci Technol 67:1627-1639.

Afrifah KA, Hickok RA, Matuana LM (2010) Polybutene as

a matrix for wood plastic composites. Compos Sci Technol


An SN, Ma XJ (2017) Properties and structure of poly(3-

hydroxybutyrate-co-4-hydroxybutyrate)/wood fiber

biodegradable composites modified with maleic anhydride.

Ind Crops Prod 109:882-888.

Arab SE, Islam MA (2015) Production of mahogany sawdust

reinforced LDPE wood-plastic composites using statistical

response surface methodology. J For Res 26:487-494.

Arbelaiz A, Fernandez B, Ramos JA, Retegi A, Llano-Ponte

R, Mondragon I (2005) Mechanical properties of short flax

fibre bundle/polypropylene composites: Influence of

matrix/fibre modification, fibre content, water uptake and

recycling. Compos Sci Technol 65:1582-1592.

Ashori A (2008) Wood–plastic composites as promising

green-composites for automotive industries. Bioresour

Technol 99:4661-4667.

Ayrilmis N, Jarusombuti S, Fueangvivat V, Bauchongkol P

(2011) Effect of thermal-treatment of wood fibres on

properties of flat-pressed wood plastic composites. Polym

Degrad Stabil 96:818-822.

Ayrilmisa N, Kaymakcia A, Gulec T (2015) Potential use of

decayed wood in production of wood plastic composite.

Ind Crops Prod 74:279-284.

Bal BC (2016) Some technological properties of laminated

veneer lumber produced with fast-growing poplar and

eucalyptus. Maderas Cienc Tecnol 18:413-424.

Bengtsson M, Gatenholm P, Oksman K (2005) The effect of

crosslinking on the properties of polyethylene/wood flour

composites. Compos Sci Technol 65:1468-1479.

Chaudemanche S, Perrot A, Pimbert S, Lecompte T, Faure F

(2018) Properties of an industrial extruded HDPE-WPC:

The effect of the size distribution of wood flour particles.

Constr Build Mater 162:543-552.

CNS (2006) GB/T 20241-2006. Laminated veneer lumber.

Standards Press of China, Beijing, China.

CNS (2011) GB/T 26899-2011. Structural glued laminated

timber. Standards Press of China, Beijing, China.

CNS (2013) GB/T 17657-2013. Test methods for evaluating the

properties of wood-based panels and surface decorated woodbased panels. Standards Press of China, Beijing, China.

CNS (2016) LY/T 2720-2016. Test method for wood failure

percentage in adhesive bonded joints. Standards Press of

China, Beijing, China.

Deka BK, Maji TK (2012) Effect of silica nanopowder on the

properties of wood flour/polymer composite. Polym Eng

Sci 52:1516-1523.

Fang L, Chang L, Guo WJ, Chen YP, Wang Z (2013a)

Manufacture of environmentally friendly plywood bonded

with plastic film. For Prod J 63(7-8):283-287.

Fang L, Chang L,Guo WJ, Ren YP,Wang Z (2013b) Preparation

and characterization of wood-plastic plywood bonded with

high density polyethylene film. Holz Roh Werkst 71:739-746.

Garcıa M, Hidalgo J, Garmendia I, Jaca JG (2009) Woodplastics composites with better fire retardancy and durability performance. Composites Part A 40:1772-1776.

Hosseinaei O,Wang SQ, Enayati AA, Rials TG (2012) Effects

of hemicellulose extraction on properties of wood flour and

wood-plastic composites. Composites Part A 43:686-694.

Hu YC,Nakao T, Nakai T,Gu JY, Wang FH (2005) Vibrational

properties of wood plastic plywood. J Wood Sci 51:13-17.

Islam MS, Hamdan S, Jusoh I, Rahman MR, Ahmed AS

(2012) The effect of alkali pretreatment on mechanical and

morphological properties of tropical wood polymer

composites. Mater Des 33:419-424.

Kılıç M (2011) The effects of the force loading direction on

bending strength and modulus of elasticity in laminated

veneer lumber (LVL). BioResources 6:2805-2817.

Kord B (2011) Influence of maleic anhydride on the flexural,

tensile and impact characteristics of sawdust flour reinforced

polypropylene composite. World Appl Sci J 12:1014-1016.

Krzysik AM, Youngquist J (1991) Bonding of air-formed

woodfiber/polypropylene fiber composites. Int J Adhes

Adhes 11:235-240.

Lee B, Kim HJ, Park HJ (2002) Performance of paper sludge/

polypropylene fiber/linocellulosic fiber composites. J Ind

Eng Chem 8:50-56.

Leu SY, Yang TH, Lo SF, Yang TH (2012) Optimized

material composition to improve the physical and mechanical

properties of extruded wood–plastic composites (WPCs). Constr Build Mater 29:120-127.

Li X, Lei BR, Lin ZD, Huang LH, Tan SZ, Cai X (2013) The

utilization of organic vermiculite to reinforce wood-plastic

composites with higher flexural and tensile properties. Ind

Crops Prod 51:310-316.

Maiti SN, Singh K (1986) Influence of wood flour on the

mechanical properties of polyethylene. J Appl Polym Sci


Maldas D, Kokta BV (1989) Improving adhesion of wood

fiber with polystyrene by the chemical treatment of fiber

with a coupling agent and the influence on the mechanical

properties of composites. J Adhes Sci Technol 3:529-539.

Maldas D, Kokta BV (1993) Performance of hybrid reinforcements in PVC composites. II: Use of surface-modified

mica and different cellulosic materials as reinforcements.

J Vinyl Technol 15:38-44.

Melo RR, Menezzi CHS (2014) Influence of veneer thickness

on the properties of LVL from Parica (Schizolobium

amazonicum) plantation trees. Holz Roh Werkst 72:191-198.

Nourbakhsh A, Ashori A (2008) Fundamental studies on

wood-plastic composites: Effects of fiber concentration

and mixing temperature on the mechanical properties of

poplar/PP composite. Polym Compos 29:569-573.

Pendleton DE, Hoffard TA, Adcock T, Woodward B,

Wolcott MP (2002) Durability of an extruded HDPE/wood

composite. Int J Agric Biol Eng 52:21-27.

Raj RG, Kokta BV, Daneault C (1989) Effect of chemical

treatment of fibers on themechanical properties of polyethylenewood fiber composites. J Adhes Sci Technol 3:55-64.

Schirp A, Shen S (2016) Effectiveness of pre-treated wood

particles and halogen-free flame retardants used in woodplastic

composites. Polym Degrad Stabil 126:81-92.

Segerholm BK, Ibach RE, Westin M (2012) Moisture

sorption, biological durability, and mechanical performance

of WPC containing modified wood and polylactates.

BioResources 7:4575-4585.

Soccalingame L, Bourmaud A, Perrin D, Benezet J, Bergeret

A (2015) Reprocessing of wood flour reinforced polypropylene

composites: Impact of particle size and coupling

agent on composite and particle properties. Polym Degrad

Stabil 113:72-85.

Srivabut C, Ratanawilai T, Hiziroglu S (2018) Effect of

nanoclay, talcum, and calciumcarbonate as filler on properties

of composites manufactured from recycled polypropylene

and rubberwood fiber. Constr Build Mater 162:450-458.

Stark NM, Rowlands RE (2007) Effects of wood fiber

characteristics on mechanical properties of wood/

polypropylene composites. Wood Fiber Sci 35:167-174.

Stark NM, White RH, Mueller SA, Osswald TA (2010)

Evaluation of various fire retardants fire retardants for use

in wood flour polyethylene composites. Polym Degrad

Stabil 95:1903-1910.

Wang Z, Bao F, Guo W (2003) The effect of the process

factors on the properties of wood-plastics composites

panels. Linye Kexue 39:87-94 [in Chinese].

Wei LQ, Mcdonald AG, Freitag C, Morrell JJ (2013a) Effects

of wood fiber esterification on properties, weatherability

and biodurability of wood plastic composites. Polym

Degrad Stabil 98:1348-1361.

Wei P, Wang B, Zhou D, Dai C, Wang Q, Huang S (2013b)

Mechanical properties of poplar laminated veneer lumber

modified by carbon fiber reinforced polymer. Bio-

Resources 8:4883-4898.

Winandy J (2013) State of the art paper: Effects of fire retardant

treatments on chemistry and engineering properties of wood. Wood Fiber Sci 45:131-148.

Yang TH, Yang TH, Chao WC, Leu SY (2015) Characterization

of the property changes of extruded wood-plastic composites during year round subtropical weathering. Constr Build Mater 88:159-168.

Yue K, Chen ZJ, LuWD, LiuWQ, Li MY, ShaoYL, Tang LJ,

Wan L (2017) Evaluating the mechanical and fire-resistance

of modified fast-growing Chinese fir timber with boricphenol-

formaldehyde resin. Constr Build Mater 154:956-962.

Yue K, Liu WQ, Chen ZJ, Lu XN, Lu WD (2016) Investigation

of the creep property of fast-growing poplar

wood modified with low molecular weight resins. Bio-Resources 11:1620-1633.





Research Contributions