College of Engineering, China Agricultural University, Beijing 100083, China.
State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China.
Int J Mol Sci. 2022 Jun 17;23(12):6783. doi: 10.3390/ijms23126783.
Cellulose triacetate (CTA) was successfully synthesized from corn stover cellulose (CSC) in the presence of [PyPS]PWO (IL-POM). The effects of IL-POM contents, reaction temperature, and reaction time on the yield and degree of substitution of CTA were investigated. The synthesized CTA was characterized by SEM, FTIR, and TGA, and the degree of polymerization and solubility in various organic solvents were evaluated. Results showed that the optimum reaction conditions were as follows: 0.04 g of IL-POM, reaction temperature of 140 °C, and reaction time of 45 min, for 0.4 g of CSC and 9 mL of glacial acetic acid. The yield of CTA under optimum reaction conditions was as high as 79.27%, and the degree of substitution was 2.95. SEM and FTIR results showed that the cellulose acetylation occurred, and CTA was synthesized. The TGA results revealed that the decomposition temperature of CTA increased by about 30 °C when compared with that of CSC. A simple, environment-friendly, and efficient process for the preparation of CTA from CSC was constructed, which provides a new pathway for the high-value utilization of corn stover.
成功地在[PyPS]PWO（离子液体-POM）存在的条件下，由玉米秸秆纤维素（CSC）合成了三醋酸纤维素（CTA）。考察了离子液体-POM 含量、反应温度和反应时间对 CTA 产率和取代度的影响。通过 SEM、FTIR 和 TGA 对合成的 CTA 进行了表征，并评估了其聚合度和在各种有机溶剂中的溶解度。结果表明，最佳反应条件为：IL-POM 用量为 0.04 g，反应温度为 140°C，反应时间为 45 min，CSC 用量为 0.4 g，冰醋酸用量为 9 mL。在最佳反应条件下，CTA 的产率高达 79.27%，取代度为 2.95。SEM 和 FTIR 结果表明，纤维素发生了乙酰化反应，合成了 CTA。TGA 结果表明，与 CSC 相比，CTA 的分解温度提高了约 30°C。构建了从 CSC 制备 CTA 的简单、环保、高效的工艺，为玉米秸秆的高值化利用提供了新途径。
