PAPERmaking! FROM THE PUBLISHERS OF PAPER TECHNOLOGY Volume 4, Number 2, 2018
Characterization of pulp derived nanocellulose hydrogels using AVAP® technology, Stuart Kyle et al, Carbohydrate Polymers , Vol.198. Bioinspiration from hierarchical structures found in natural environments has heralded a new age of advanced functional materials. Nanocellulose has received significant attention due to the demand for high- performance materials with tailored mechanical, physical and biological properties. In this study, nanocellulose fibrils, nanocrystals and a novel mixture of fibrils and nanocrystals (blend) were prepared from softwood biomass using the AVAP® biorefinery technology. It is thought that these materials show great potential in (bio)nanomaterial applications where careful control of microarchitecture, surface topography and porosity are required. Photochromic properties of stimuli-responsive cellulosic papers modified by spiropyran-acrylic copolymer in reusable pH-sensors, Amin Abdollahi et al, Carbohydrate Polymers , Vol.200. Photochromic chemosensors based on spiropyran have attracted great attentions in recent years. Here, stimuli-responsive papers were prepared by chemical attachment of epoxy functionalized latex particles containing spiropyran moieties on the cellulose fibres by a new strategy for design and preparation of an acrylic copolymer pH-sensor. Enhanced antibacterial profile of nanoparticle impregnated cellulose foam filter paper for drinking water filtration, Shikha Jain et al, Carbohydrate Polymers , online. Filtration is a promising water treatment method to purify drinking water. To develop highly efficient drinking water filter paper, water-resistant cellulose foam paper with a high wet strength property was fabricated using diverse metal oxide (e.g., copper oxide (CuO), zinc oxide (ZnO), and silver oxide (Ag2O)) nanoparticles. The antibacterial profile of the cellulose foam filter impregnated with Ag2O nanoparticles, when tested against different types of bacteria, exhibited higher antibacterial activity than the cellulose foam filter impregnated with ZnO and CuO nanoparticles. One-step nanocellulose coating converts tissue paper into an efficient separation membrane, Sunanda Roy et al, Cellulose , Vol.25 (9). This article reports robust technology for converting tissue paper (TP) into an efficient separation membrane by coating with a novel superhydrophobic material that was synthesized by a rapid, one step approach without using any hazardous chemicals viz fluorinated materials or organic/inorganic nanoparticles. The coating was prepared using modified cellulose nanofibers which can readily transform a TP into an excellent oil/water separation membrane as well as a highly efficient dye absorbent upon spray coating. We believe that our ecofriendly versatile superhydrophobic coating material can be a new promising choice for many advanced applications to create more sustainable earth. Conversion of paper to film by ionic liquids: manufacturing process and properties, Atsushi Tanaka et al, Cellulose , Vol.25 (10). In this study, we investigate the “chemical welding” of paper with the ionic liqui d (IL) 1-ethyl-3-methylimidazolium acetate ([EMIM]OAc) using a two- step process. The “chemically welded” paper structure has both elevated dry and wet strength. The treatment conditions can be adjusted to produce both paper-like materials and films. The most severe treatment conditions produce films that are fully transparent and their oxygen and grease barrier properties are excellent. As an all- cellulose material, the “chemically welded” paper is fully biodegradable and is a potential alternative to fossil fuel-based plastics.
Technical Abstracts
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