The fiber-containing sludge from trearment of paper mill effluents was used for preparation of nanofibrillated cellulose by multi-stage process. Firstly, the sludge was treated by hydrochloric acid solution and washed for recovery of cellulose. Secondly, as-recovered cellulosic pulp was treated by mixture of sulfuric acid 0.25% and added hydrogen peroxide 0.1% at 140oC for 2 hours. Cellulose pulp then was treated by solution of sodium hydroxide and hydrogen peroxide followed refining. The characteristics of nanofibrillated cellulose with fiber diameter less than 100 nm were determined by SEM, FTIR and XRD. The new method of nanocellulose preparation can be developed for production of value-added products from paper mill solid waste.
Keywords: Paper mill sludge, recovered cellulose, nanocellulose.
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TẠP CHÍ KHOA HỌC VÀ CÔNG NGHỆ Giấy phép số37/GP-BTTTT (15/01/2021) Giấy phép sửa đổi, bổ sung số140/GP-BTTTT (05/3/2021) Đơn vị cấp phép:Bộ Thông tin và Truyền thông Cơ quan chủ quản:Trường Đại học Bách Khoa Hà Nội Phó tổng biên tập phụ trách:GS. Đinh Văn Phong