Liu Yujia, Zhang Lina, Ain Qurat Ul, Tong Zhangfa
Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification, Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification, Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China; College of Chemistry and Molecular Sciences, Hubei Engineering Center of Natural Polymer-based Medical Materials, and Key Laboratory of Biomedical Polymers of Ministry of Education, Wuhan University, Wuhan 430072, China.
Int J Biol Macromol. 2024 Nov;281(Pt 2):136306. doi: 10.1016/j.ijbiomac.2024.136306. Epub 2024 Oct 5.
Cellulose acetate (CA) is an important cellulose derivative with a wide range of applications. To adopt a more efficient and environmentally friendly method to synthesize cellulose acetate, a binary ionic liquid mixture of 1-butyl-3-methylimidazole chloride salt (BmimCl) and 1-butyl-3-methyldihydroimidazole phosphate (BmimHPO) was used. Compared to the conventional methods, this approach didn't require pre-activation of cellulose and the process of homogeneous acetylation proceeded without a catalyst. By simply adjusting the reaction conditions, cellulose acetate with a degree of substitution (DS) in the range of 0.83-3.0 was produced by one-step homogeneous acetylation without hydrolysis. Furthermore, the cellulose acetate film produced by solvent casting exhibited smooth surface characteristics, 95 % transparency, and 57.9 MPa tensile strength. Therefore, this study highlights the importance of using binary ionic liquid mixtures for facile synthesis of cellulose acetate. Due to their excellent transparency and mechanical properties, newly synthesized cellulose acetate films could replace commercial films.
醋酸纤维素（CA）是一种重要的纤维素衍生物，具有广泛的应用。为了采用更高效、环保的方法合成醋酸纤维素，使用了1-丁基-3-甲基咪唑氯盐（BmimCl）和1-丁基-3-甲基二氢咪唑磷酸盐（BmimHPO）的二元离子液体混合物。与传统方法相比，该方法不需要对纤维素进行预活化，均相乙酰化过程无需催化剂即可进行。通过简单地调整反应条件，一步均相乙酰化无需水解即可制备取代度（DS）在0.83-3.0范围内的醋酸纤维素。此外，通过溶剂浇铸制备的醋酸纤维素薄膜具有光滑的表面特性、95%的透明度和57.9MPa的拉伸强度。因此，本研究突出了使用二元离子液体混合物简便合成醋酸纤维素的重要性。由于其优异的透明度和机械性能，新合成的醋酸纤维素薄膜可以替代商业薄膜。
