Characterization of acetylated eucalyptus wood fibers and its effect on the interface of eucalyptus wood/polypropylene composites

Li, Yali

doi:10.1016/j.ijadhadh.2014.01.002

Cited by 9 publications

(1 citation statement)

References 33 publications

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“…Improvements in flexural modulus of up to 54 and 115 % were observed for PLA-or high-density polyethylene (HDPE)-based bio-composites. Li [22] reported that fiber acetylation increased the surface free energy of eucalyptus wood fibers from 24.7 to 38.3 mJ m -2 , higher than PP (29.4 mJ m -2 ). The acetylation facilitates the spreading of PP on the surface of wood fibers, allowing good interfacial adhesion between the acetylated eucalyptus wood fibers and PP.…”

Section: Introductionmentioning

confidence: 99%

Effects of surface modification methods on mechanical and interfacial properties of high-density polyethylene-bonded wood veneer composites

et al. 2016

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To improve interfacial adhesion between wood veneer and high-density polyethylene (HDPE) film, wood veneer was thermally modified in an oven or chemically modified by vinyltrimethoxysilane. The wood veneers were used to prepare plastic-bonded wood composites (PBWC) in a flat-press process using HDPE films as adhesives. The results showed that both modifications reduced veneer hydrophilicity and led to enhancement in shear strength, wood failure, and water resistance of the resulting PBWC. The thermal treatment significantly decreased the storage modulus close to 130°C (the melting temperature of plastic). Thermal-treated wood veneer maintains mechanical interlocking for bonding and veneer strength which then declined under thermal treatment due to hemicellulose degradation and cellulose de-polymerization. In the silanetreated PBWC, enhanced interlocking and a stronger bonding structure resulted from the reaction between the silane-treated veneer and HDPE. This strong bonding structure allowed thermal stability improvement demonstrated by high modulus and low tand values. However, the strength of silane-treated PBWC was still much lower than thermosetting resin-bonded composites at higher temperatures due to the melting behavior of thermoplastic polymer, precluding its use in certain applications.

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Section: Introductionmentioning

confidence: 99%