具有抗指纹性能的十八烷基胺化-TEMPO 氧化纤维素纳米纤维的自立膜。
Self-standing films of octadecylaminated-TEMPO-oxidized cellulose nanofibrils with antifingerprint properties.
机构信息
Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, 43 Section 4, Keelung Road, Taipei, 10607, Taiwan, ROC.
Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, 43 Section 4, Keelung Road, Taipei, 10607, Taiwan, ROC.
出版信息
Carbohydr Polym. 2021 Mar 15;256:117536. doi: 10.1016/j.carbpol.2020.117536. Epub 2021 Jan 1.
Self-standing films of cellulose nanofibril derivatives were prepared via oxidation by the 2,2,6,6-tetramethyl-1-piperidinyloxy radical and amidation with octadecylamine (ODA). The transparency and rigidity of the films decreased and their flexibility increased as the amide/carboxyl ratio increased. The introduction of the ODA also resulted in rising contact angles of water (from 43.5° to 117°) and oleic acid (from 22.5° to 57.1°). Furthermore, the films exhibited unique oil repellency: a drop of hexadecane slipped without tailing on the surface modified by ODA. This phenomenon was observed after moderate modification (water contact angle: 95-114°) and was absent for the films with the lowest and highest extents of modification. Then, the antifingerprint property of the films was examined by means of the powder test, and a reduction in fingerprints on the films was demonstrated. These results suggest the usefulness of developing transparent, self-standing oil-repellent films without perfluorinated compounds for antifingerprint and other antifouling applications.
通过 2,2,6,6-四甲基-1-哌啶氧基自由基氧化和十八胺（ODA）酰胺化，制备了纤维素纳米纤维衍生物的自立膜。随着酰胺/羧基比的增加，膜的透明度和刚性降低，柔韧性增加。ODA 的引入还导致水（从 43.5°增加到 117°）和油酸（从 22.5°增加到 57.1°）接触角上升。此外，这些薄膜表现出独特的拒油性：在经过 ODA 修饰的表面上，十六烷滴滑过而无尾迹。这种现象在适度修饰（水接触角：95-114°）后观察到，而在修饰程度最低和最高的薄膜中则不存在。然后，通过粉末试验检查了薄膜的抗指纹性能，并证明了薄膜上指纹的减少。这些结果表明，开发无全氟化合物的透明自立型拒油薄膜在用于抗指纹和其他防污应用方面具有实用性。
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