|Zheng, Yi - UC DAVIS, DAVIS, CA|
|Zhang, Ruihong - UC DAVIS, DAVIS, CA|
|Jenkins, Bryan - UC DAVIS, DAVIS, CA|
|Blunk, Sherry - UC DAVIS, DAVIS, CA|
Submitted to: Bioresource Technology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: April 1, 2006
Publication Date: April 1, 2007
Citation: Zheng, Y., Pan, Z., Zhang, R., Jenkins, B.M., Blunk, S. 2007. Particleboard Properties of Saline Jose Tall Wheatgrass and Effect of Chemical Treatment. Bioresource Technology. 98:1304-1310. Interpretive Summary: The objectives of this study were to (1) characterize the mechanical properties and water resistance of particleboard made from Jose Tall Wheatgrass (JTW) as affected by adhesives (PMDI and UF), NaOH treatment, initial MC of JTW particles, and density of particleboards; and (2) determine the contact angles between the adhesives (PMDI and UF) and JTW (with and without NaOH treatment) and investigate the relationship between the contact angle and particleboard properties.
Technical Abstract: 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/cm3. The particleboards with density of 0.74 g/cm3 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.