PAPERmaking! FROM THE PUBLISHERS OF PAPER TECHNOLOGY Volume 2, Number 1, 2016
improved the degradation rate of the nanocomposite and particularly ACNFs reduced degradation rate of the nanocomposite toward fungal degradation. Surface grafting of cellulose nanocrystals with natural antimicrobial rosin mixture using a green process, Daniele Oliveira de Castro et al , Carbohydrate Polymers , 137. Surface functionalisation of cellulose nanocrystals (CNCs) aims to improve their properties. The main objective of this study was the esterification of the surface of CNCs using nontoxic resin acids. The antimicrobial activities of the modified and neat CNC were investigated; the rosin-grafted CNC exhibited a strong antibacterial activity against Gram- negative bacteria and a modest antibacterial activity against Gram-positive bacteria. Extraction and comparison of carboxylated cellulose nanocrystals from bleached sugarcane bagasse pulp using two different oxidation methods, Kaitao Zhang et al , Carbohydrate Polymers , 138. Two kinds of carboxylated cellulose nanocrystals and the effects of oxidant content on the yield, carboxyl content, degree of polymerization (DPv) and morphology of the oxidised celluloses in the two oxidation methods were studied. Nanofibrillated cellulose (CNF) from eucalyptus sawdust as a dry strength agent of unrefined eucalyptus handsheets, María Evangelina Vallejos et al , Carbohydrate Polymers , 139. Nanofibrillated cellulose has been obtained from the cellulosic fraction of eucalyptus sawdust. The obtained CNF was subsequently used as a dry strength agent on unbleached unrefined eucalyptus pulp. The addition of 3, 6 and 9wt.% of CNF increased lineally the tensile index of handsheets, compatible with papermachine runnability. The other mechanical properties also increased substantially, and porosity decreased moderately. PLLA-grafted cellulose nanocrystals: Role of the CNC content and grafting on the PLA bionanocomposite film properties, Erlantz Lizundia et al , Carbohydrate Polymers , 142. Cellulose nanocrystals (CNC), extracted from microcrystalline cellulose by acid hydrolysis, were grafted by ring opening polymerization of l-Lactide at two different CNC:l-lactide ratios. The resulting CNC-g-PLLA nanohybrids were incorporated in poly(lactic acid) (PLA) matrix by an optimised extrusion process at two different content and obtained bionanocomposite films were characterised by thermal, mechanical, optical and morphological properties. Microfibrillated cellulose and borax as mechanical, O2-barrier, and surface- modulating agents of pullulan biocomposite coatings on BOPP, Carlo A. Cozzolino et al , Carbohydrate Polymers , 143. Multifunctional composite coatings on bi-oriented polypropylene (BOPP) films were obtained using borax and microfibrillated cellulose (MFC) added to the main coating polymer. The deposition of the coatings yielded an increase in the elastic modulus of the entire plastic substrate, a decrease of both static and kinetic coefficients of friction, dramatically increased the oxygen barrier performance of BOPP, especially under dry conditions, and highly wettable surfaces. Fabrication of flexible self-standing all-cellulose nanofibrous composite membranes for virus removal, Weijuan Huang et al , Carbohydrate Polymers , 143. All-cellulose nanocomposite membranes with excellent performance were successfully fabricated as novel filtration system to remove nanoparticles and virus from aqueous medium. These membranes were composed of two combined layers: an electrospun cellulose nanofabric layer treated by hot-pressing to provide mechanical support and a coating of regenerated cellulose gel with tiny inter-connected pores as barrier.
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Technical Abstracts
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