Thursday, September 3, 2009

Value Added: Corn Meal for Plywood Glue

Corn germ meal left over after oil is extracted from corn in biorefineries making corn-ethanol may have a value-added use as a protein extender for plywood glues.

Agricultural Research Service (ARS) scientist chemist Milagros Hojilla-Evangelista has devised a corn-germ formulation for use in sprayline coating, a procedure that applies a liquid adhesive to wood surfaces using overhead nozzles.

In tests, she applied the corn-germ-based glue to one side of 12-inch by 12-inch southern pine veneers, then hot-pressed them following industry-standard conditions to produce three-ply panels. Her analysis of the material found the bonding strength of the corn-germ-based glue to be similar to that of the wheat-flour-based formula used as extender for most plywood glues.

Currently, most corn germ is fed to poultry and other livestock animals. But if America’s biorefineries increase corn-ethanol production from the current 9 billion gallons to 15 billion gallons by 2015, as planned, a surplus of corn germ could be looming on the horizon.

Source: Agricultural Research Service

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