PAPERmaking! FROM THE PUBLISHERS OF PAPER TECHNOLOGY Volume 7, Number 1, 2021
products. In this chapter, the first part of the chapter discusses the recent progress in the applications of nanocellulose as a dry- and wet-strength agent. The second part describes the use of nanocellulose in coating and barrier packaging. It needs to provide prospects of nanocellulose by reducing its production cost and post-processing, and explore novel application for paper-based products. NOVEL PRODUCTS “ Functional paper-based materials for diagnostics ”, Laura M. Hillscher, Valentina J. Liebich, Olga Avrutina, Markus Biesalski & Harald Kolmar, ChemTexts , 7, Article 14 (2021). Functional papers are the subject of extensive research efforts and have already become an irreplaceable part of our modern society. Among other issues, they enable fast and inexpensive detection of a plethora of analytes and simplify laboratory work, for example in medical tests. This article focuses on the molecular and structural fundamentals of paper and the possibilities of functionalization, commercially available assays and their production, as well as on current and future challenges in research in this field. PACKAGING TECHNOLOGY “ Fiber characterization of old corrugated container bleached pulp with laccase and glycine pretreatment ”, Guozheng Chen, Junjing Dong, Jinquan Wan, Yongwen Ma & Yan Wang, Biomass Conversion and Biorefinery , (2021). In response to deal with the increasingly serious environmental problems and shortage of fiber raw materials, biological enzyme pretreatment is an effective way to replace a large number of chemical additives to improve the properties of waste paper fibers. Fiber characterization of old corrugated container bleached pulp with laccase and glycine (Lac/Gly) pretreatment was investigated by means of Fourier transform infrared spectroscopy (FTIR), headspace gas chromatography (HSGC), fiber quality measurements (FQA), X-ray diffraction method (XRD), and atomic force microscope (AFM). Results showed that, compared with the control pulp, the whiteness and brightness of the Lac/Gly-treated pulp increased by 16.17% and 7.41%, respectively. And the FTIR showed that Lac/Gly pretreatment promotes the effective removal of lignin by hydrogen peroxide (H2O2) bleaching. The content of carboxyl groups in pulp increased remarkably by 21.92%. The paper physical analysis showed that the paper strength properties have improved remarkably. The fiber quality analyses indicated that the fiber length, coarseness, and curl index changed a little. The XRD analysis showed that the crystallinity decreased by 5.83% due to Lac/Gly treatment. The AFM analysis showed that through Lac/Gly treatment, the lignin and extracts over the fiber surface are decreased significantly. “ Biopolymers and Biocomposites from Agro-Waste for Packaging Applications: 2 - Antimicrobial coated food packaging paper from agricultural biomass ”, Khadija El Bourakadi, Fatima-Zahra Semlali, Aouragh Hassani, Abou El Kacem Qaiss & Rachid Bouhfid, Biopolymers and Biocomposites from Agro-Waste for Packaging Applications , Woodhead Publishing Series in Composites Science and Engineering, 2021, 35-63. Recently, the research and development of novel antimicrobial food packaging paper have been accrued a considerable attention due to their ultimate advantages namely contain food in a cost-effective way that satisfies industry requirements and consumer desires, maintains food safety, and minimizes environmental impact also to increase the shelf life of foodstuff. These unique food packaging papers can be prepared through different materials such as synthetic polymers, nature or bio-polymers owing to their numerous properties. Therefore, in order to enhance the biological properties particularly the antimicrobial activity against the most pathogenic bacteria and
Technical Abstracts
Page 7 of 13
Made with FlippingBook Ebook Creator