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Influence of silane surface modification of veneer on interfacial adhesion of wood-plastic plywood

机译：单板硅烷表面改性对木塑胶合板界面粘合的影响

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摘要

In this study, wood-plastic plywood was fabricated with high density polyethylene (HDPE) film and poplar veneer by hot-pressing. To improve the interfacial adhesion between the wood veneer and HDPE film, silane A-171 (vinyltrimethoxysilane) was used to treat the surface of poplar veneer by spraying. The effects of silane agent on the veneer surface properties as well as the physical-mechanical performance of wood-plastic plywood were evaluated. The adsorption of several prehydrolyzed alkoxysilanes onto the veneer surface and the existence of a covalent bonding between the wood veneer and silane agent were confirmed using FTIR, XPS and contact angle. Silane surface treatment resulted in enhancement of shear strength and water resistance. When one layer HDPE film was used as adhesive, it caused 293.2% increase in shear strength, 34.6% and 40.8% reduction in water absorption and thickness swelling, respectively. In addition, the wood failure also increased from 5% to 100% due to the silane modification. Dynamic mechanical analysis (DMA) results showed that treated plywood have higher storage modulus, lower tan S peak value and lagged temperature for tan S peak value with respect to untreated plywood. Experimental results of interfacial morphology by SEM further revealed better interaction between silane A-l 71 treated veneer and HDPE film.
机译：在这项研究中，木塑胶合板由高密度聚乙烯（HDPE）薄膜和杨木贴面通过热压制成。为了改善木单板和HDPE膜之间的界面粘合力，使用硅烷A-171（乙烯基三甲氧基硅烷）通过喷涂处理杨木单板的表面。评估了硅烷试剂对单板表面性能以及木塑胶合板物理机械性能的影响。使用FTIR，XPS和接触角证实了几种预水解的烷氧基硅烷在单板表面上的吸附以及木材单板与硅烷剂之间存在共价键。硅烷表面处理可提高剪切强度和耐水性。当一层HDPE薄膜用作粘合剂时，其剪切强度增加了293.2％，吸水率和厚度溶胀分别减少了34.6％和40.8％。另外，由于硅烷改性，木材的破坏率也从5％增加到100％。动态力学分析（DMA）结果表明，与未处理的胶合板相比，处理的胶合板具有更高的储能模量，较低的tan S峰值和tan S峰值的滞后温度。通过SEM的界面形态的实验结果进一步揭示了硅烷A-1 71处理的饰面与HDPE膜之间更好的相互作用。

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  • 来源
    《Applied Surface Science》 |2014年第1期|682-689|共8页
  • 作者

    Lu Fang; Liang Chang; Wen-jing Guo; Yongping Chen; Zheng Wang;

  • 作者单位

    Research Institute of Wood Industry, Chinese Academy of Forestry, No 1 Dongxiaofu, Haidian District, Beijing 100091, PR China;

    Research Institute of Wood Industry, Chinese Academy of Forestry, No 1 Dongxiaofu, Haidian District, Beijing 100091, PR China;

    Research Institute of Wood Industry, Chinese Academy of Forestry, No 1 Dongxiaofu, Haidian District, Beijing 100091, PR China;

    Research Institute of Wood Industry, Chinese Academy of Forestry, No 1 Dongxiaofu, Haidian District, Beijing 100091, PR China;

    Research Institute of Wood Industry, Chinese Academy of Forestry, No 1 Dongxiaofu, Haidian District, Beijing 100091, PR China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Wood-plastic plywood; Interfacial adhesion; Silane agent; Surface properties;

    机译：木塑胶合板;界面黏附;硅烷剂;表面特性;

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