Production of a highly dispersed filler for building composites from flax processing waste

Introduction. The study investigates the possibility of extracting valuable compounds from flax processing waste (flax shives) for subsequent use as a highly dispersed filler in building composites. Materials and methods. The following chemical reagents were used for synthesis: H2SO4 93.64 % (C.P.), NaOH (C.P.), H2O (distilled), H2O2 ~30 % (C.P.) as well as flax shives powder crushed in a cryogenic mill. Results and discussion. The characteristics of the raw materials confirmed the presence of useful components in the material – cellulose, silicon dioxide and lignin. A technology for the chemical treatment of flax shives was developed, thereby enabling the extraction of valuable components. Conclusion. A method for obtaining cellulose, silicon dioxide and lignin from flax shives has been worked out. Further practical application of the obtained materials for building compositions is possible after the use of special purification methods.