PAPERmaking! g FROM THE PUBLISHERS OF PAPER TECHNOLOGY Volume 1, Number 1, 2015
Click chemistry route to covalently link cellulose and clay, P. Yadav et al , Cellulose , 22 (3). An efficient method for covalently linking of cellulose and clay using a click chemistry based strategy is reported. Azide and alkynyl derivatives of silane were synthesized and used for silanization of cellulose and clay respectively. Functionalised cellulose and clay were then coupled using Cu(I) catalyzed azide – alkyne cycloaddition reaction, resulting in a covalent linkage between them. Modification of wollastonite by acid treatment and alkali-induced redeposition for use as papermaking filler, H. Xue et al , Powder Technology , 276. After acid treatment then alkaline deposition, the wollastonite particles were larger, had a higher zeta potential, and were brighter than were those of the original sample. The properties of paper sheets, especially bulk and brightness, in which a Na 2 SiO 3 -induced redeposited wollastonite sample was used as the filler were superior to those in which the original wollastonite sample or other alkali-induced redeposited wollastonite samples were used. POWER & ENERGY The changing nature of life cycle assessment, M.C. McManus & C.M. Taylor, Biomass and Bioenergy , online. LCA has evolved from its origins in energy analysis in the 1960s and 70s into a wide ranging tool used to determine impacts of products or systems over several environmental and resource issues. This paper examines LCA's on- going evolution and its use within bioenergy deployment. Changes seen in bioenergy LCA will bleed into other LCA arenas, especially where it is important that a sustainable solution is chosen. Recycling of Paper Mill Biosolids: A Review on Current Practices and Emerging Biorefinery Initiatives, M. Pervaiz & M. Sain, CLEAN – Soil, Air, Water , 43 (6). This review presents an holistic overview on current practices in dealing with paper sludge and their environmental and economic implications. Also presented is a comprehensive discussion on emerging biorefinery trends leading to value-added utilisation of primary, secondary and mixed biosolids originating from effluent treatments plants, especially from paper mill operations. PULP Biochemical evaluation of xylanases from various filamentous fungi and their application for the deinking of ozone treated newspaper pulp, P. Chutani & K.K. Sharma, Carbohydrate Polymers , 127. Filamentous fungi, Aspergillus oryzae MDU-4 was selected for xylanase production. The implementation of ozone treatment in the deinking of newspaper pulp resulted in high crystallinity index (72.1%) and more fibrillar surface. Furthermore, the xylanase treated pulp showed significant improvement in optical properties such as brightness (57.9% ISO) and effective residual ink concentration (211ppm). Production of recycled cellulose fibers from waste paper via ultrasonic wave processing, X. Guo et al , Journal of Applied Polymer Science , 132 (19). The objective of this article was to study the production of recycled cellulose fibres from waste paper using ultrasonic wave processing. The physical and chemical properties of recycled cellulose fibres, such as water absorption, specific surface area and pore characteristics, etc., were investigated with various testing methods. The results indicated that the ultrasonic cavitation effect was feasible for the preparation of the secondary fibres.
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Technical Abstracts
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