Preparation method for acetylation of cotton cellulose nanofiber/polycaprolactone composite material

• Main Authors: SUN YINGYUN, MO SHANGLIN, PANG JINYING, LEE IN-HWAN
• Format: Patent
• Language: Chinese; English
• Published: 02.09.2022
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

The invention discloses a preparation method for acetylating a cotton cellulose nanofiber/polycaprolactone composite material, which comprises the following steps: preparing a cellulose/ionic liquid solution, aCNF, aCNF slurry and the like, and stirring, standing and drying to prepare a film aCNF/PCL composite material. Epsilon-caprolactone and acetylated CNF (aCNF) are subjected to blending polymerization and compounded together through interaction among groups to prepare a basically uniform sheet-shaped film, and the problems of low PCL strength, high crystallinity, slow degradation, poor water solubility and the like are solved by preparing aCNF/PCL composite material films with different proportions, and the application range of PCL is expanded. 本发明公开了一种棉花纤维素纳米纤维/聚己内酯复合材料乙酰化的制备方法，包括制备纤维素/离子液体溶液、aCNF、aCNF浆等步骤，经搅拌、静置、干燥后制成薄膜aCNF/PCL复合材料。本申请将ε-己内酯与乙酰化的CNF(aCNF)共混聚合，通过基团之间的相互作用复合在一起，制备成基本均匀的片状薄膜，通过制备不同配比的aCNF/PCL复合材料膜，改善了PCL强度不高、高结晶性、降解缓慢、水溶性差等问题，扩展PCL的使用范围。