The variation of green density and bark percentage wasstudied in this *** green density was tested by excluding water, and bark percentage was tested by measuring bulk and weighing quality. The research showed that: ...
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The variation of green density and bark percentage wasstudied in this *** green density was tested by excluding water, and bark percentage was tested by measuring bulk and weighing quality. The research showed that: the green density of fast-growing eucalyptus of five year, six year, seven year was 1.033g/cm3, 1.037 g/cm3,1.036 g/cm3 respectively, and their variation was unremarkable among different age. The bark bulk percentage of five year, six year, seven year was 17.56%、16.29%、13.94% respectively, and their variation wassignificant among different age. The bark quality percentage of five year, six year, seven year was 18.34%、 14.57%、11.21% respectively, and their variation wassignificant among different age.
steam explosion treatments were used to modify straw fiber attributes for panel manufacturing. In particular, the effect of steam temperature and retention time on morphology, acidity, wettability, and ash and silicon...
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steam explosion treatments were used to modify straw fiber attributes for panel manufacturing. In particular, the effect of steam temperature and retention time on morphology, acidity, wettability, and ash and silicon contents of wheat straws wasstudied. The resultsshowed that the pH value of the untreated wheat straw fibre was nearly 7 and the pH values and acid buffer capacities of straws were greatly reduced after steam explosion treatments. This indicated that the acidity of straws increased after steam explosion treatments. The dynamic contact angle of the straws before the treatment was nearly 90 degree, indicating that the straw materials without treatment are more hydrophobic. After steam explosion treatments, the contact angle of straws wassignificantly reduced, showing that the surface wettability of the treated straws was improved. The ash and silicon contents of straws were also significantly reduced by steam explosion treatments. The improved acidity and wettabillity as well as decreased silicon content would contribute to the improved bondability between straw particles and water-soluble adhesive binders.
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