Effect of three tree species on UV weathering of wood flour-HDPE composites

查看全文 作　　者：Van Dinh [1]Nguyen;Tat Thang [1]Nguyen;Aihong [1]Zhang;Jianxiu [1]Hao;Weihong [1]Wang

机构地区：[1]Key Laboratory of Biobased Material Science&Technology(Ministry of Education),Northeast Forestry University,Harbin 150040,China

出　　处：《Journal of Forestry Research》索引2020年第31卷第3期,共9页

基　　金：supported by the Key Natural Science Foundation of Heilongjiang Province(No.ZD 2016002);the Fundamental Research Funds for the Central Universities(No.2572017ET05)。 摘　　要：Eucalyptus urophylla, Acacia mangium, and Pinus caribaea are the primary species for the wood industry in Vietnam. Wood residues of these species were used to reinforce high-density polyethylene(HDPE) composites. The flexural or bending property, impact strength and surface color were evaluated after exposure to accelerated ultraviolet weathering up to 2000 h. The weathered surface was characterized by scanning electron microscopy(SEM) and Fourier transform infrared(FTIR) spectroscopy. The results indicate that A. mangium/HDPE composites had the lowest color change and least fading,and remained stable after 1500 h exposure. FTIR spectroscopy showed that the oxidation of the composites increased in parallel with duration of exposure by assessing the concentration of carbonyl groups on the surfaces. SEM showed that all three species reinforced composites exhibited similar severe cracks after 1000 h;however, at the end of the weathering test, E. urophylla and P. caribaea composites were more severely cracked than A. mangium composites. A. mangium also had the highest flexural strength, impact strength and crystallinity duringweathering. A. mangium is the most preferable among the three species to reinforce HDPE. 关键词：EUCALYPTUS urophylla ACACIA mangium PINUS caribaea POLYETHYLENE WEATHERING Color Mechanical property

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Effect of three tree species on UV weathering of wood flour-HDPE composites

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