PAPERmaking! FROM THE PUBLISHERS OF PAPER TECHNOLOGY Volume 7, Number 2, 2021
“ Hydrophobic, moisture resistant and biorenewable paper coating derived from castor oil based epoxy methyl ricinoleate with repulpable potential ” , P.A. Parvathy & Sushanta K. Sahoo, Progress in Organic Coatings , Vol.158, September 2021. After ban on single-use plastics, completely bio-based coating on paper is in great demand to replace the plastic liner and other organic-inorganic hybrid coating. To resolve the issues like moisture, hydrophilicty and repulpability after use, a green, sustainable and hydrophobic bio-coating material for paper substrate has been developed. In this work, silanized castor oil (SCO) and silanized methyl ricinoleate (SMR) bio-resins are synthesized by structural modifications of epoxidized castor oil through transesterification and silanization process, Subsequently, the silylated bio-resins are hydrolysed and subjected to crosslinking with cellulosic paper substrate through condensation process. The coated papers showed hydrophobicity with water contact angle (WCA) up to 97° and strongly moisture resistant (moisture content of 2 – 3%) nature. Scanning electron microscopy analysis with energy dispersive X-ray spectra confirms the uniform coating of SMR resin with better texture and higher degree of silane grafting. The water vapor transmission rate (WVTR) decreased by 77.5% after coating because of blockage of pores and strong bonding with the cellulosic fibers. Further the coated papers showed adequate thermal stability and better tensile strength for commercial packaging. These coatings are removed by exposing to strong alkali solution at 90 °C and the recyclability potential of the paper is confirmed for reuse. These renewable resourced and eco-friendly coating materials are found to be suitable alternative for paper packaging and other coating applications with circular economy approach. ENVIRONMENT Bio Ǧ based Packaging: Material, Environmental and Economic Aspects , Chapter 22 “ Life Cycle Assessment of Bio-Based Packaging Products ” , H.N. Salwa, S.M. Sapuan, M.T. Mastura, M.Y.M Zuhri & R.A. Ilyas, (Book Editor(s): S.M. Sapuan, R.A. Ilyas). Life cycle assessment (LCA) can be utilized to evaluate the technical solutions employed in the production process to identify impacts originating not only from the production itself but also from the phases of use and end-of-life (EOL) issues. This chapter discusses thoroughly each phase of the LCA outline and reviews recent different LCA studies conducted on packaging products constructed from bio-based materials. The main elements in the first phase of LCA operation are illustrated. Life cycle inventory (LCI) is the second phase of LCA where usage of resources and materials and the consumption of fuels and energy need to be quantified. Packaging materials go through different life cycles, which then generate certain environmental impacts at different stages of the supply chain and for different environmental indicators. The third phase of the LCA framework is the life cycle impact assessment, which focuses on evaluating and understanding the environmental impacts established by the LCI analysis. MOULDED PULP “ Design and development of eco-friendly cutlery out of paper waste through molding next generation waste management ” , Richa Pandey, Rahul Singh, Phuleshwar Baitha & Roshan Topno, Materials Today Proceedings , 43(3), 2021, pp.1557-1561. The waste of paper or the paper dump is a serious problem and its occurrence is widespread in various institutions. Wastepaper can be recycled to produce some important and usable products that are ecological and biodegradable. For example, it is used to extract new paper from the old by chemical decomposition. Other products such as paper plates, paper cups, paper spoons, tiles, toys, crafts, etc. can be formed from the slurry. This project also initiates a mould that makes cups and plates from the wastepaper management circuit. With learning institutions being the main consumers,
Technical Abstracts
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