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首页> 外文期刊>Journal of Polymers and the Environment >Self-Bonding Boards From Plantain Fiber BundlesAfter Enzymatic Treatment: Adhesion Improvementof Lignocellulosic Products by Enzymatic Pre-Treatment
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Self-Bonding Boards From Plantain Fiber BundlesAfter Enzymatic Treatment: Adhesion Improvementof Lignocellulosic Products by Enzymatic Pre-Treatment

机译：车前纤维束中的自粘合板经过酶处理后：通过酶预处理改善木质纤维素产品的粘合力

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摘要

Self-bonding boards were manufactured with treated fibers at different concentrations of a laccase enzyme. This enzyme induced the generation of phenoxy radicals in the fiber lignin which can generate covalent bonds and cross-linked by radical-radical coupling. The effect of laccase concentration on the properties of obtained fiberboards was evaluated. The formation of free radicals and changes in the lignin macromolecule was measured using scavenging activity test, infrared spectroscopy, electron paramagnetic resonance and scanning electron microscopy. Thermal and mechanical properties of the resulting fiberboards were determined by differential scanning calorimetry, thermo gravimetric analysis and flexion tests. Increased thermal stability, modulus of elasticity and modulus of rupture and also, a reduction in thickness swelling and water absorption, were observed at higher concentrations of laccase. These results are ascribed to the effect of the free radicals that were generated during the enzymatic treatment.
机译：用不同浓度的漆酶酶处理过的纤维制成自粘板。该酶诱导了木质素纤维中苯氧基的产生，该苯氧基可以产生共价键并通过自由基-自由基偶联而交联。评估了漆酶浓度对所得纤维板性能的影响。使用清除活性测试，红外光谱，电子顺磁共振和扫描电子显微镜测量自由基的形成和木质素大分子的变化。通过差示扫描量热法，热重分析和挠曲测试来确定所得纤维板的热和机械性能。在较高的漆酶浓度下，观察到热稳定性，弹性模量和断裂模量增加，并且厚度膨胀和吸水率降低。这些结果归因于酶处理过程中产生的自由基的作用。

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  • 来源
    《Journal of Polymers and the Environment》 |2011年第1期|p.182-188|共7页
  • 作者

    Catalina Alvarez; Benjamin Rojano; Ovidio Almaza; Orlando J. Rojas; Piedad Ganan;

  • 作者单位

    School of Engineering, Mechanical Engineering Program,New Materials Research Group, Universidad PontificiaBolivariana, Circular 1, # 70-01, bloque 11, Medelh'n, Colombia;

    School of Engineering, Agro-Industrial Engineering Program,Universidad Pontificia Bolivariana, Medellfn, Colombia;

    Department of Chemistry, Universidad Nacional de Colombia,Medellfn, Colombia;

    Department of Physics, Universidad Nacional de Colombia,Bogota, Colombia;

    Department of Forest Biomaterials, North Carolina StateUniversity, Raleigh, NC, USA;

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  • 正文语种 eng
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  • 关键词

    self-bonding; plantain fibers; laccase; boards; free radicals;

    机译：自粘;芭蕉纤维;漆酶;自由基;

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