PAPERmaking! FROM THE PUBLISHERS OF PAPER TECHNOLOGY Volume 4, Number 2, 2018
Nanocellulose-based Multilayer Barrier Coatings for Gas, Oil, and Grease Resistance, Preeti Tyagi et al, Carbohydrate Polymers , online. Cellulose nanofibers (CNF) have been studied for their excellent oxygen and gas barrier properties; however, their performance rapidly decreases in the presence of moisture and higher humidity. Cellulose nanocrystals (CNC) are less sensitive to moisture due to their highly crystalline nature; however, coatings and films made of CNCs are more prone to fractures due to their high brittleness. Our work demonstrates a unique composite barrier coating system of CNF and CNC that synergistically enables oil and grease resistance (a kit rating of 11) comparable to fluorochemicals. The improvements in oil and gas barrier properties were evaluated with respect to the molecular, chemical, and structural properties of the developed coatings. Multifunctional nano-cellulose composite films with grape seed extracts and immobilized silver nanoparticles, Zhengguo Wu et al, Carbohydrate Polymers , online. Nowadays, traditional packaging films with weak activity or single function cannot satisfy the active packaging requirements. In this paper, novel multifunctional films (TNC/GSE/AgNPs) based on TEMPO-oxidized nano-cellulose (TNC), grape seed extract (GSE) and TNC immobilized silver nanoparticles (TNC@AgNPs) are reported. The results showed that transparent TNC/GSE/AgNPs films exhibited better mechanical properties, lower water vapour permeability and oxygen permeability compared to pure TNC films. The prepared films will exhibit multifunction as food packaging to extend storage period. Evaluation of the functionality of bio-based food packaging films, D. Briassoulis & A. Giannoulis, Polymer Testing , Vol.69. The importance of bio-based food packaging films is increasing rapidly. The functionality of selected representative bio-based compostable food packaging films was investigated against that of conventional films. The evaluation of the functionality of food packaging films was based on testing their performance with respect to critical mechanical and other functional properties. The mechanical and other functional characteristics of the bio-based food packaging films offer new design possibilities for targeted food packaging applications. PAPERMAKING Exploring structural variations of hydrogen-bonding patterns in cellulose during mechanical pulp refining of tobacco stems, Deqing Zhao et al, Carbohydrate Polymers , online. Hydrogen bonding and mechanical refining are closely correlated. In this work, structural variations of hydrogen bonding patterns in cellulose during mechanical pulp refining, including the hydrogen bonding energy and distance as well as the content of hydrogen bonds, have been explored by using the second derivative FTIR spectra and deconvolving spectra in the OH stretching vibrational region. Development and utilization of lime Ǧ mud waste as filler for production of green paper, Abd El Ǧ Aziz A. Said et al, Environmental Progress & Sustainable Energy , Vol.0 (0). In this article, the lime Ǧ mud (LM) as a waste generated in the Kraft pulping process was treated to improve its quality to be utilized again as filler. The final treated LM was characterized by different techniques and compared with the currently used calcium carbonate filler.
Technical Abstracts
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