PAPERmaking! FROM THE PUBLISHERS OF PAPER TECHNOLOGY Volume 3, Number 2, 2017
A new quality index for benchmarking of different cellulose nanofibrils, Johanna Desmaisons et al , Carbohydrate Polymers , 174. From a single plant source, a wide range of mechanically-deconstructed cellulose nanomaterials can be obtained due to the large number of possible combinations of pre-treatments, mechanical disintegration process, and post-treatments. It leads to the existence of a variety of cellulose nanofibrils with different shapes, morphologies, and properties on the market. This method also allows for the benchmarking of different commercial nanocellulose products. NOVEL PRODUCTS Simple and green fabrication of AgCl/Ag-cellulose paper with antibacterial and photocatalytic activity, Lin Dai et al , Carbohydrate Polymers , 174. A green in situ technique to prepare a kind of multifunctional hybrid paper, AgCl/Ag particles hybrid cellulose-paper (AgCl/Ag-paper), was established. The AgCl/Ag-paper was obtained from a facile ultrasound agitation procedure. Overall, this work provided a simple and green approach for the preparation of a new paper-based material with effectively antibacterial, photocatalytic activity, and biocompatibility for various applications and also showed the potential of scale-up production. Combination of microsized mineral particles and rosin as a basis for converting cellulosic fibers into “sticky” superhydrophob ic paper, Xiaoyan Yu et al , Carbohydrate Polymers , 174. In the paper industry, microsized mineral particles are widely used in the production of printing/writing paper grades, while rosin derived from trees is the earliest internal sizing agent for paper hydrophobication. Internal filling of cellulosic networks with mineral particles was basically used to hold out the mineral particles added at the surface, and the delicate integration of wet-end/surface applications of mineral particles with paper surface engineering with rosin/alum led to the development of “sticky” superhydrophobicity, i.e., ultrahigh water -repellency and strong adhesion to water. This proposed concept may provide valuable implications for expanding the use of paper-based products to unconventional applications, e.g., ultrahigh-performance ink jet printing paper for mitigating the “coffee - ring effect” and paper -based microfluidic devices for biomedical testing. Magnetic cellulose nanocrystal nanocomposites for the development of green functional materials, E. Lizundia et al , Carbohydrate Polymers , 175. A magnetic cellulosic material composed of cellulose nanocrystals (CNC) and cobalt ferrite (CoFe2O4) nanoparticles was developed through evaporation-induced self-assembly (EISA). Those features obtained in a non-petroleum-based composite provide insight into the development of the next generation of functional materials from natural origin. Comparative study of ultra-lightweight pulp foams obtained from various fibers and reinforced by MFC, Y. Liu et al , Carbohydrate Polymers , 182. A range of cellulose- based, ultra-lightweight pulp foams with different morphologies were prepared and reinforced with microfibrillated cellulose (MFC). By careful design of the pulp foam forming process, free-standing ultra-lightweight pulp foams were obtained through high velocity mixing and air/oven drying from cellulose fibre in the presence of surfactant, MFC, and retention aid. The effects of different types of fibres and surfactants on the air uptake volumes and mechanical properties of the foam were systematically investigated. The process developed in this work provides a cost effective approach to fabricate the strong and ultra-lightweight pulp foam, with a density lower than 0.02 g/cm3, using a standard handsheet former.
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Technical Abstracts
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