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Cellulose nanofibril (CNFs) surface modification examples. (a) Anion luminescent nanocellulose gel [139]; (b) Superhydrophobic modification of cellulose fabric [140]; (c) Cationic modification [141]; (d) Cellulose was esterified and grafted with cyclodextrin [142]; (e) Electrospinning and sulfhydrylated cellulose [143]. Copyright 2019, 2018, 2020, 2017, 2020 respectively. Reproduced with permission from Elsevier.
