PAPERmaking! FROM THE PUBLISHERS OF PAPER TECHNOLOGY Volume 4, Number 2, 2018
COATING Photoluminescent spray-coated paper sheet: Write-in-the-dark, Tawfik A. Khattab et al, Carbohydrate Polymers , Vol.200. A simple formulation of an organic-inorganic composite for spray-coating was adopted toward photoluminescent paper sheets. The coating composite layer was composed of a synthetic organic adhesive binder mixed with an inorganic lanthanide-doped strontium aluminate pigment. Such pigment-binder formula was applied effectively onto paper sheets via spray-coating followed by thermal fixation. The spray-coated paper sheets demonstrated good fastness to light and reversible phosphorescence without fatigue. Continuous roll-to-roll coating of cellulose nanocrystals onto paperboard, Rajesh Koppolu et al, Cellulose , Vol.25 (10). There is an increased interest in the use of cellulose nanocrystal (CNC) films and coatings for a range of functional applications in the fields of material science, biomedical engineering, and pharmaceutical sciences. Most of these applications have been demonstrated on films and coatings produced using laboratory-scale batch processes, such as solvent casting, dip coating, or spin coating. For successful coating application of CNC suspensions using a high throughput process, several challenges need to be addressed: relatively high viscosity at low solids content, coating brittleness, and potentially poor adhesion to the substrate. This work aims to address these problems. Compared to other film casting techniques, the process employed in this work deposits a relatively thick coating in significantly less time, and may therefore pave the way toward various functional applications based on CNCs. MOULDED PULP Moulded pulp products manufacturing with thermoforming, Mattia Didone & Guido Tosello, Packaging Technology and Science , Vol.0 (0). Over the past years, eco Ǧ friendly packaging solutions such as moulded pulp have resonated with a growing number of consumers. Among all of them, the thermoformed products make use of the most recent manufacturing approach that produces high Ǧ quality, thin Ǧ walled items. However, it remains an under-researched area, and the development of an efficient and precise manufacturing process is fundamental in order to increase the implementation of sustainable packaging. NANO-SCIENCE Preparation and characterization of antimicrobial films based on nanocrystalline cellulose, Yan Zhang et al, Journal of Applied Polymer Science , Vol.0, (0). Nanocrystalline cellulose (NCC) has great potential in applications in medical and food packaging due to its abundance, high specific surface area, biodegradability, biocompatibility, and reproducibility. N Ǧ Halamine is one of the most effective antibacterial agents, with broad Ǧ spectrum efficacy against microorganisms, good stability, and reproducibility. Due to the nanosize effect and high specific surface area of NCC, N Ǧ halamine Ǧ modified NCC is potentially an excellent biocidal compound. In this paper, an N Ǧ halamine precursor 1 Ǧ hydroxymethyl Ǧ 5,5 Ǧ dimethylhydantoin (HDH) was used to modify NCC with cyanuric chloride (cych) as the bonding agent. Green synthesis of cellulose nanofibers using immobilized cellulose, Mohamed A. Yassin et al, Carbohydrate Polymers , Vol.205. Isolation of cellulose nanofibers (CNF) using cellulase immobilized on cheap and easily formed polymeric gel disks is discussed. Such gel disks based on carrageenan gel coated with hyperbranched polyamidoamine that can covalently bind to cellulase through glutaraldehyde spacer. Thermal and mechanical stability of the coated gel disks were significantly improved. Free and immobilized cellulase exhibited maximum activities at 50 °C and pH 5. However,
Technical Abstracts
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