三醋酸纤维素的合成：预处理甘蔗渣的一锅法有机催化酯交换反应及脱木质素过程

Suzuki Shiori, Shibata Yoshiki, Hirose Daisuke, Endo Takatsugu, Ninomiya Kazuaki, Kakuchi Ryohei, Takahashi Kenji

Faculty of Natural System, Institute of Science and Engineering, Kanazawa University Kakuma-machi Kanazawa 920-1192 Ishikawa Japan

Department of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University 1-3 Tatara Miyakodani Kyoutanabe 610-0394 Kyoto Japan.

RSC Adv. 2018 Jun 13;8(39):21768-21776. doi: 10.1039/c8ra03859g.

Cellulose triacetate was synthesised by the transesterification reaction of mild acid-pretreated lignocellulosic biomass with a stable acetylating reagent (isopropenyl acetate, IPA) in an ionic liquid (1-ethyl-3-methylimidazolium acetate, EmimOAc) which enabled the dissolution of lignocellulose as well as the organocatalytic reaction. The homogeneous acetylation of pretreated sugar-cane bagasse was carried out under mild conditions (80 °C, 30 min), and the subsequent reprecipitation processes led to enriched cellulose triacetate with a high degree of substitution (DS; 2.98) and glucose purity (∼90%) along with production of lignin acetate.

通过温和酸预处理的木质纤维素生物质与稳定的乙酰化试剂（乙酸异丙烯酯，IPA）在离子液体（1-乙基-3-甲基咪唑乙酸盐，EmimOAc）中进行酯交换反应合成了三醋酸纤维素，该离子液体能够溶解木质纤维素并进行有机催化反应。预处理后的甘蔗渣在温和条件下（80℃，30分钟）进行均相乙酰化，随后的再沉淀过程得到了具有高取代度（DS；2.98）和葡萄糖纯度（约90%）的富集三醋酸纤维素，同时还生成了醋酸木质素。