Location: Functional Foods ResearchTitle: Properties of composite wood panels fabricated from Eastern Redcedar employing various bio-based green adhesives
|MANKOWSKI, MARK - Forest Service (FS)|
Submitted to: BioResources
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 6/29/2019
Publication Date: 7/2/2019
Citation: Tisserat, B., Eller, F.J., Mankowski, M.E. 2019. Properties of composite wood panels fabricated from Eastern Redcedar employing various bio-based green adhesives. BioResources. 14(3):6666-6685. https://doi.org/10.15376/biores.14.3.6666-6685.
Interpretive Summary: Eastern redcedar (ERC) (Juniperus virginiana L., family Cupressaceae) trees may provide a source of bio-materials for engineered wood lumber (i.e., plywood, particleboard, oriented strand board). Currently such products are fabricated using synthetic adhesive resins which contain cancerous formaldehyde. In this study, alternative bio-based adhesives were substituted for synthetic adhesives. Distiller’s dried grains and solubles (DDGS), Osage orange and Soybean flours exhibited good adhesive properties to fabricate fiberboards. These bio-composite had properties sufficient enough to meet Industry strength standards. The commercial employment of these biobased adhesives would result in industrial uses of low value plant-based by-products in the engineered wood manufacturing industries.
Technical Abstract: Bio-based flours derived from Distillers dried grains with solubles (DDGS), Osage orange seed meal (OOSM) or defatted commercial soybean meal flour-Prolia (PRO) were employed as binding resins with Eastern Redcedar (Juniperus virginiana L.) wood (ERC) to fabricate fiberboards. OOSM and DDGS were defatted with hexane, milled and screened prior to use. PRO was employed as provided. DDGS, OOSM or PRO flour were mixed dry with ERC wood to make fiberboards using the following conditions: molding temperature of 185 oC, ERC particle sizes of -75-1700 um, pressure of 5.6 MPa, and employed in flour dosages of 10 to 75%. Molded composites were evaluated for their flexural properties. Flexural properties of DDGS and OOSM resin flour-ERC composites were similar to composites fabricated using PRO as the resin/adhesive. Dimensional stability properties (water absorption and thickness swelling) of DDGS-ERC, OOSM-ERC and PRO-ERC composites were similar. Biobased-ERC composite properties satisfied several European Committee Industry Standards for commercial acceptable fiberboards in terms of their flexural properties but were decidedly inferior in terms of thickness swelling properties when subjected to water immersion testing. Surface roughness and color analysis of bio-composites were also conducted. There were statistical correlations between surface roughness and color properties and the composition of the bio-composites. ERC bio-composite panels were found to have termite resistance.