Development of functional board and sheet recycled from reutilizing charcoal powder processed at high temperature

摘要

Development has been done to prepare the functional board or sheet made from the charcol powder processed at high temperature, HTCP, which has some functions such as humidity adjustment and gas absorption. The process to prepare board or sheet has been investigated by conjugating HTCP with sodium alginate or chitosan as an adhensive, and also with waste dried rush, waste shell powder, or distillery waste eater from sweet potato shochu as a binder. The composite boards were a thichness of about 10mm and the best compressive strength among them was 109kPa. The binder of waste dried rush was effective to improve the compressive strength of the board. The sheets obtained gave a thickness of 2-3mm, and their best tensil strength and expansion rate were12.7kPa and 128%, respectively. waste dried rush and distillery waste water from sweet potato shochu employed as a binder, and also glycerol employed as a flexibilizer were so effective as to make the sheet with suitable tensil strength and flexibility.