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[目的]为了改善麦秆表面胶接性能以制备大豆分离蛋白胶黏剂麦秆刨花板,分别对麦秆表面进行化学处理和酶处理。[方法]通过接触角测量和计算扩散-渗透系数(K),对未处理(对照试样)和两种化学处理及三种酶处理麦秆的麦秆表面润湿性进行评价分析,并通过X射线光电子能谱(XPS)对处理试样和对照试样进行表面元素分析。[结果]结果表明氢氧化钠处理、过氧化氢处理以及脂肪酶处理后的麦秆表面扩散-渗透系数K值同对照试样相比,分别提高了58.0%,48.7%和83.2%。XPS分析表明处理后的麦秆表面硅元素含量的急剧减少和蜡质层的破坏都为麦秆表面润湿性的改善起到了很重要的作用。[结论]麦秆化学处理和脂肪酶处理为豆胶麦秆刨花板的制备提供了技术支持。
[Objective] The research aimed to improve the gluing performance of wheat straw surface to prepare soy protein isolate wheat straw particleboard. The surface of wheat straw was chemically and enzymatically treated. [Method] The wettability of wheat straw surface treated and untreated (control sample) and two chemical treatments and three enzymatic treatments were evaluated by measuring and calculating the diffusion-permeability coefficient (K) X-ray photoelectron spectroscopy (XPS) performed surface elemental analysis of the treated and control samples. [Result] The results showed that the surface diffusion-permeability coefficient K of wheat straw increased by 58.0%, 48.7% and 83.2% compared with that of the control sample after sodium hydroxide treatment, hydrogen peroxide treatment and lipase treatment. XPS analysis showed that the sharp reduction of silicon content and the damage of waxy layer on the treated straw all play an important role in improving the wettability of wheat straw surface. [Conclusion] The chemical treatment of wheat straw and lipase treatment provided the technical support for the preparation of soybean gluten particleboard.