Zheng Yi, Pan Zhongli, Zhang Ruihong, Jenkins Bryan M, Blunk Sherry
Biological and Agricultural Engineering Department, University of California, Davis, One Shield Avenue, CA 95616, USA.
Bioresour Technol. 2007 Apr;98(6):1304-10. doi: 10.1016/j.biortech.2006.04.036. Epub 2006 Jun 27.
The objective of this research was to characterize the qualities (mechanical properties and water resistance) of particleboard made from saline Jose Tall Wheatgrass (JTW), Agropyron elongatum. For the JTW particleboards made with 4% polymeric methane diphenyl diisocyanate (PMDI), the mechanical properties and water resistance improved with the increase of particleboard density from 0.71 to 0.75 g/cm(3). The particleboards with density of 0.74 g/cm(3) had similar mechanical properties of wood-based particleboards, except for lower internal bond strength. Among the particleboards made with particles of different initial moisture contents from 2% to 10%, the particleboard with the particles of 8% initial moisture content had the highest qualities. The pretreatment using NaOH solution to wash the JTW particles reduced the qualities of finished particleboards bonded with both PMDI and urea formaldehyde (UF) resins. Particleboards made with PMDI showed superior qualities than those made with UF, as shown by the measured contact angle results between the adhesives and JTW.
本研究的目的是表征由盐碱地长穗偃麦草（JTW）制成的刨花板的品质（机械性能和耐水性）。对于用4%的聚合二苯基甲烷二异氰酸酯（PMDI）制成的JTW刨花板，随着刨花板密度从0.71 g/cm³增加到0.75 g/cm³，其机械性能和耐水性得到改善。密度为0.74 g/cm³的刨花板具有与木质刨花板相似的机械性能，只是内结合强度较低。在由初始含水量从2%到10%的不同颗粒制成的刨花板中，初始含水量为8%的颗粒制成的刨花板品质最高。用NaOH溶液对JTW颗粒进行预处理会降低用PMDI和脲醛（UF）树脂粘结的成品刨花板的品质。如所测的胶粘剂与JTW之间的接触角结果所示，用PMDI制成的刨花板比用UF制成的刨花板品质更优。
