Highly Transparent, Self-Reinforced, and Hydrophobic Cellulose Acetate Films Fabricated Based on Thermal Stretching and Surface Engineering,Industrial & Engineering Chemistry Research

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Highly Transparent, Self-Reinforced, and Hydrophobic Cellulose Acetate Films Fabricated Based on Thermal Stretching and Surface Engineering
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2022-09-07 , DOI: 10.1021/acs.iecr.2c02689
Juan Qi ₁ , Yuan Chen ₁ , Ling Xu ₂ , Hua-Dong Huang ₁ , Gan-Ji Zhong ₁ , Hao Lin ₁ , Zhong-Ming Li ₁

Affiliation

Imparting cellulose acetate with surface hydrophobicity and self-cleaning function without sacrificing its high transparency and mechanical robustness is a great challenge. In this work, we report a highly transparent, self-reinforced, and hydrophobic cellulose diacetate (CDA) film, prepared by the combination of non-solvent-induced phase separation, uniaxial thermal stretching, and slippery liquid injection (LI). Results indicate that the surface-modified CDA films have hydrophobicity, with the water contact angle (WCA) increasing from ∼58.2 to 105–109°. Meanwhile, by adjusting the draw ratio, the sliding of liquid on the film surface and the WCA hysteresis are effectively improved, especially the sliding angle of CDA-LI-1.7-200 film decreases from 30.5° (for the unmodified CDA film) to 9.4°. Notably, uniaxial stretching provides enhanced mechanical strength for this antifouling CDA film, with up to 60.2% increase in tensile strength (from 37.2 to 59.6 MPa). Meanwhile, it is noted that the modified CDA film also has excellent transparency (≥92%), even slightly higher than that of the unmodified CDA film (∼91.5%). In addition, the surface-modified CDA films show excellent anti-scratching performance and maintain good liquid repellency even after several cycles of severe scratching. The work would provide guidance for the facile preparation of high-performance and multifunctional CDA films.

中文翻译：

基于热拉伸和表面工程的高透明、自增强和疏水醋酸纤维素薄膜

在不牺牲其高透明度和机械强度的情况下赋予醋酸纤维素表面疏水性和自清洁功能是一项巨大的挑战。在这项工作中，我们报告了一种高度透明、自增强和疏水的二乙酸纤维素 (CDA) 薄膜，该薄膜由非溶剂诱导的相分离、单轴热拉伸和滑液注入 (LI) 组合而成。结果表明，表面改性的CDA薄膜具有疏水性，水接触角（WCA）从~58.2增加到105-109°。同时，通过调整拉伸倍率，液体在薄膜表面的滑动和WCA滞后现象得到有效改善，特别是CDA-LI-1.7-200薄膜的滑动角从30.5°（未改性CDA薄膜）降低到9.4°。 °。尤其，单轴拉伸为这种防污 CDA 薄膜提供了增强的机械强度，拉伸强度提高了 60.2%（从 37.2 到 59.6 MPa）。同时，值得注意的是，改性CDA薄膜还具有优异的透明度（≥92%），甚至略高于未改性CDA薄膜（~91.5%）。此外，表面改性的 CDA 薄膜表现出优异的抗划伤性能，即使在多次严重划伤循环后仍能保持良好的拒液性。该工作将为轻松制备高性能和多功能CDA薄膜提供指导。甚至略高于未改性的 CDA 薄膜（~91.5%）。此外，表面改性的 CDA 薄膜表现出优异的抗划伤性能，即使在多次严重划伤循环后仍能保持良好的拒液性。该工作将为轻松制备高性能和多功能CDA薄膜提供指导。甚至略高于未改性的 CDA 薄膜（~91.5%）。此外，表面改性的 CDA 薄膜表现出优异的抗划伤性能，即使在多次严重划伤循环后仍能保持良好的拒液性。该工作将为轻松制备高性能和多功能CDA薄膜提供指导。

更新日期：2022-09-07

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