Method for Preparing a Powder from Brown Macroalgae and Method for Fabricating Rigid Objects from Said Powder

摘要

A method is provided for fabricating a rigid object from a powder produced from brown macroalgae treated with weak acids. The powder presents a particle size of between 0.5 and 1.5 millimeters and a residual moisture content of less than or equal to 26%. The method includes a step of thermocompressing the powder into a mold, the powder being brought to a temperature of between 50 and 180° C. and subjected to a pressure of between 10000 and 100000 bar for 50 to 200 seconds. A method is also provided for preparing the powder.

主权项

1. A method for preparing a powder from brown macroalgae, intended for the fabrication of rigid objects, characterized in that the method comprises the following steps, in this order:
harvesting and washing the brown macroalgae; treating the brown macroalgae with weak acids, by immersion of said macroalgae in a weak acid bath and/or spraying the weak acid onto said macroalgae; grinding the brown macroalgae; filtration, so as to extract a residue of non-solubilized algae; grinding the residue and then drying the residue for 5 to 48 hours at a temperature of 30° C. and 60° C., so as to obtain a powder with a particle size of between 0.5 and 1.5 millimeters and presenting a residual moisture content equal to or less than 26% by mass.