The Effect of Nanofibrillated Tempo-oxidized Cotton Linters on the Strength and Optical Properties of Paper

This study elaborates the application of composite films based on nanofibrillated cellulose obtained from cotton linters oxidized in the 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO)/NaBr/NaClO system, with the use of CaCО3 and/or Al(OH)3 as fillers, and glycols as plasticizers, to improve the mechanical, optical, and sorption properties of paper. The paper coating with nanofibrillated cellulose-based films, without additional adhesive, depending on the concentration of nanofibrillated cellulose in the dispersion and the type of filler, improves the mechanical properties of paper, and decreases sorption properties, while no significant changes were observed in optical properties compared to the initial papers.本研究阐述了以经2,2,6,6-四甲基哌啶-1-氧自由基（2,2,6,6-tetramethylpiperidine-1-oxyl radical，TEMPO）/NaBr/NaClO体系氧化所得棉短绒制备的纳米原纤化纤维素（nanofibrillated cellulose）为基材的复合薄膜的应用，该复合薄膜以碳酸钙（CaCO₃）和/或氢氧化铝（Al(OH)₃）为填料、二醇类物质为增塑剂，旨在改善纸张的力学、光学与吸附性能。采用该纳米原纤化纤维素基薄膜直接对纸张进行涂布（无需额外粘合剂），其涂布效果取决于分散液中纳米原纤化纤维素的浓度与填料种类，可提升纸张的力学性能并降低其吸附性能，而与原纸相比，涂布后纸张的光学性能无显著变化。