Multifunctional scalable coated paper sheets for UV shielding and sublimation printing applications
Résumé
Abstract Agricultural residues are produced annually; recycling these wastes in various ways is considered economically valuable. In this context, biopolymer-reinforced composite materials were developed to create alternative, eco-friendly, and sustainable resources for different applications. With advancements in innovative chemical techniques, cellulose nanofibers with silica have been simultaneously obtained. Rice residues were transformed into silica-based cellulose nanofibers (SCN NP ) through hydrolysis using ammonium persulfate (APS) under microwave radiation at 70 °C, 1.25 M APS, an irradiation time of 20 min, and a liquor ratio of 1:75. Additionally, rice residue was converted into silica nanostructure SiO 2NP via hydrochloric acid hydrolysis followed by calcination at 600 °C. The principal characterizations of the extracted SCN NP and SiO 2NP were evaluated using FTIR, XRD, BET surface area analysis, SEM, TEM, EDX and ζ-potential measurements. To produce cellulose/silica hybrid composites on a paper matrix, co-processing of the isolated SiO 2NP and/or SCN NP , which contained silica, was considered. Different concentrations of [SiO 2NP (0.25–3%w/v)/SCN NP (0.5%w/v)] nanocomposites were used to modify the fabricated paper sheets, with cationic polyacrylamide (CPAM) serving as a binder. Fabricated paper sheets treated with various concentrations of (CPAM/SiO 2NP /SCN NP ) nanocomposite solutions were prepared. The impact of SiO 2NP and/or SCN NP on the modified paper’s surface structure, strength, barrier, and UV shielding characteristics was examined. To evaluate color properties, the fabricated paper sheets treated with different concentrations of CPAM/SiO 2NP /SCN NP , were silk-screen printed using disperse dye. Under different conditions (temperatures of 170–210 °C and time of 30–60 s.), the printed paper sheets were tested as heat transfer paper in sublimation transfer printing of polyester fabrics. Polyester samples printed using sheets treated with CPAM/0.5% SCN NP and CPAM/3% SiO 2NP showed enhanced color depth. All polyester samples printed with modified sheets demonstrated outstanding fastness properties. Additionally, some treated paper sheets showed remarkable transfer stability during a second printing run.
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