Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, Shandong, China.
Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, Shandong, China.
Carbohydr Polym. 2021 Dec 1;273:118569. doi: 10.1016/j.carbpol.2021.118569. Epub 2021 Aug 20.
Cellulose films with biodegradability and intrinsically antistatic property have many applications. However, conventional cellulose films show poor toughness and UV-shielding property, and the major sources are high-grade cotton linter or wood pulp. Herein, by using low-cost waste cotton textiles as the raw materials, we successfully fabricated transparent cellulose/aramid nanofibers (ANFs) films, in which in-situ retained ANFs had a diameter of 20-30 nm and a length of several micrometers. Because ANFs and cellulose chains formed strong hydrogen bonding interactions, the tensile strength and elongation of the resultant cellulose/ANFs film with 1.0 wt% ANFs could reach 54.4 MPa and 15.8%, respectively, increased by 63.4% and 154% compared to those of pure cellulose film (33.3 MPa and 6.2%). Meanwhile, the cellulose/ANFs films show excellent UV-shielding properties and irradiation stability. Hence, the novel cellulose/ANFs films with improved mechanical and UV-shielding performance were in-situ prepared leading to enhance the valorization of waste cotton textiles.
具有生物降解性和本征抗静电性能的纤维素薄膜有许多应用。然而，传统的纤维素薄膜表现出较差的韧性和抗紫外线性能，其主要来源是高档棉绒或木浆。在此，我们使用低成本的废旧棉纺织品作为原料，成功制备了透明的纤维素/芳纶纳米纤维（ANFs）薄膜，其中原位保留的 ANFs 的直径为 20-30nm，长度为数微米。由于 ANFs 和纤维素链之间形成了强氢键相互作用，添加 1.0wt% ANFs 的纤维素/ANFs 薄膜的拉伸强度和伸长率分别达到 54.4MPa 和 15.8%，与纯纤维素薄膜（33.3MPa 和 6.2%）相比，分别提高了 63.4%和 154%。同时，纤维素/ANFs 薄膜具有优异的紫外线屏蔽性能和辐照稳定性。因此，通过原位制备具有改善的机械性能和紫外线屏蔽性能的新型纤维素/ANFs 薄膜，提高了废旧棉纺织品的附加值。
