PAPERmaking! FROM THE PUBLISHERS OF PAPER TECHNOLOGY Volume 7, Number 2, 2021
AGRI-FIBRES “ Camellia oleifera Shell as a Potential Agricultural By-product for Paper Production ”, Wenhua Gao, Luyao Huang, Zhihui Lei & Zhiwei Wang, BioResources, 2021, Vol.16(2), pp.3734-3745. The aim of this study was to investigate a potential biorefinery process to realize the high utilization of Camellia oleifera shell (COS), which is an agricultural by-product mainly composed of cellulose, hemicellulose, and lignin. Before treatment by steam explosion, the COS was impregnated with water, 3.0 wt% NaOH solution, or 3.0 wt% H2SO4 solution. The morphological structure and chemical composition of the steam-exploded COS pulp were investigated. The results indicated that the impregnation treatments increased the cellulose content of the steam-exploded COS pulp and decreased the hemicellulose and lignin content. The morphology of steam- exploded COS fiber was short, coarse and stiff. Hydrophobic and colorful handsheets were fabricated by mixing proportional bleached softwood fiber. This study demonstrated that COS was a potential material for the papermaking industry, and the combination of water impregnation and steam explosion treatment for COS was a good pulp process. “ Review on The Paper Making Process From Bamboo As A Paper Product ” , Muhammad Akie Shamsuri, Progress in Engineering Application and Technology , Vol.1(1), (2021). Bamboo is a grass that can grow to 25 m in six months. Every culm emerges from the ground at its final diameter (i.e. its girth does not extend over its lifetime), tapering as it rises in height, and increasing vertically by "telescopically" cell division between nodes (i.e., the distance between nodes increases as it grows). When fully cultivated, it takes normally three to five years to grow to full strength, during which they are silified and lignified. This study aims to review the papermaking process from bamboo as a paper product. The density (for bamboos), fiber dimensions, morphological indices, and chemical composition of the raw materials studied were determined. The Kraft, pulping processes were applied and some of the pulps produced were bleached according to the D0EpD1 bleaching sequences (where D represents chlorine dioxide and Ep represents peroxide reinforced alkaline extraction) bleaching methods. The fiber dimensions were microscopically evaluated. The average fiber length of bamboo is around 2.29 mm for length, 16.4 μm for total width, 6.4 μm for wall thickness, and 3.5 μm for lumen diameter. According to flexibility coefficients, bamboo has higher bonding strength (tensile, burst, double folds). The thicker wall of Gigantochloa scortechinii (9 μm) compared to other bamboo indicated very different morphological indices and behavior. The chemical composition of the raw materials was typical for non-woody plants. They have high ash content and low lignin contents. The very good cellulose content of bamboo can make very good pulp yield. The higher cellulose content (52.7%) of Melocanna Baccifera predicted better yields. The overall chemical composition indicates the suitability of alkaline methods for pulping with reasonable alkali charges and predicted good to excellent yields. This was demonstrated by cooking with different alkali charges. Nonwood Plant Fibers for Pulp and Paper (Book), Pratima Bajpai, Elsevier, 2021. Nonwood Plant Fibers for Pulp and Paper examines the use of nonwood plant fibers for pulp and paper, worldwide pulping capacity of nonwood fibers, categories of non-wood raw materials, problems associated with the utilization of non-wood fibers, pulping, bleaching, chemical recovery and papermaking of nonwood raw materials, the use of nonwood plant fibers in specific paper and paperboard grades, and the advantages and drawbacks of using nonwood fiber for papermaking and future prospects. This book gives professionals in the field the most up-to-date and comprehensive information on the state- of- the-art techniques and aspects involved in pulp and paper making from nonwood plant fibers.
Technical Abstracts
Page 2 of 11
Made with FlippingBook Online newsletter maker