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Morphological and interfacial properties of chemically-modified tropical hardwood

机译：化学改性热带硬木的形态学和界面性质

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摘要

Chemical modification of wood with acetic anhydride is an environmentally friendly process to sustain and improve wood properties over a longer term than naturally allowed. Such an approach offers many potential and attractive product avenues for the wood industry. In this study, obeche tropical hardwood (Triplochiton scleroxylon) was acetylated with acetic anhydride to improve its mechanical and interfacial properties relative to unmodified wood; specifically, dimensional stability in terms of anti-swelling efficiency (ASE), water repellent efficiency (WRE), and hydrophobicity were the target properties of interest. The chemical modification was carried out at 120 degrees C with five varying reaction times (1-5 h) to optimize the reaction based on weight percent gain (WPG). It was found that as the reaction time increased, the WGP and hydrophobicity increased, but the percentage of water absorption and volumetric swelling diminished. In total, acetylation provided the hardwood with good dimensional stability. The chemically-modified wood was characterized by Fourier transform-infrared (FT-IR), dynamic contact angle, and an Owens-Wendt surface energy analysis.
机译：用乙酸酐的木材化学改性是一种环保的过程，可以在长期内维持和改善木质性质而不是自然允许的。这种方法为木业提供了许多潜在和有吸引力的产品途径。在这项研究中，高级热带硬木（Triplochiton scleroxylon）用乙酸酐乙酰化，相对于未修饰的木材改善其机械和界面特性;具体地，在抗溶胀效率（ASE），防水效率（WRE）方面的尺寸稳定性是感兴趣的目标性质。化学改性在120℃下进行，具有五个不同的反应时间（1-5小时），以优化基于重量百分比增益（WPG）的反应。结果发现，随着反应时间增加，WGP和疏水性增加，但吸水率和体积肿胀减少的百分比。总共，乙酰化提供了硬木，具有良好的尺寸稳定性。化学改性木材的特征在于傅里叶变换 - 红外（FT-IR），动态接触角和欧文斯 - Wendt表面能分析。

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  • 来源
    《RSC Advances》 |2016年第8期|共6页
  • 作者

    Adebawo F. G.; Naithani V.; Sadeghifar Hasan; Tilotta D.; Lucia L. A.; Jameel Hasan; Ogunsanwo O. Y.;

  • 作者单位

    N Carolina State Univ Dept Forest Biomat Campus Box 8005 Raleigh NC 27695 USA;

    N Carolina State Univ Dept Forest Biomat Campus Box 8005 Raleigh NC 27695 USA;

    N Carolina State Univ Dept Forest Biomat Campus Box 8005 Raleigh NC 27695 USA;

    N Carolina State Univ Dept Forest Biomat Campus Box 8005 Raleigh NC 27695 USA;

    N Carolina State Univ Dept Forest Biomat Campus Box 8005 Raleigh NC 27695 USA;

    N Carolina State Univ Dept Forest Biomat Campus Box 8005 Raleigh NC 27695 USA;

    Univ Ibadan Dept Forest Resources Management Ibadan Nigeria;

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  • 正文语种 eng
  • 中图分类 化学;
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