Transparent cellulose/aramid nanofibers films with improved mechanical and ultraviolet shielding performance from waste cotton textiles by in-situ fabrication

• Published in: Carbohydrate polymers 2021-12, Vol.273, p.118569-118569, Article 118569
• Main Authors: Xia, Guangmei, Zhou, Qiwen, Xu, Zhen, Zhang, Jinming, Zhang, Jun, Wang, Jie, You, Jiuhao, Wang, Yuanhang, Nawaz, Haq
• Format: Article
• Language: English
• Subjects: Cellulose/aramid nanofibers films; In-situ fabrication; Ultraviolet shielding performances; Valorization; Waste cotton
• ISSN: 0144-8617; 1879-1344
• DOI: 10.1016/j.carbpol.2021.118569

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. •Valorization of waste cotton textiles were realized via an eco-friendly process.•Transparent cellulose/aramid nanofibers films were in-situ fabricated successfully.•The obtained cellulose/ANFs films exhibited good mechanical property.•Cellulose/ANFs films displayed excellent ultraviolet shielding performance.