超临界流体环境中纤维素的活化

• Format: Patent
• Language: Chinese
• Published: 22.08.2017
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; COMPOSITIONS BASED THEREON; DERIVATIVES THEREOF; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; POLYSACCHARIDES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR PREPARATION OR CHEMICAL WORKING-UP

种新的超临界流体活化纤维素的方法，其中超临界流体环境中包含非极性超临界流体溶剂和极性共溶剂，或者超临界流体环境中包含极性超临界流体及任选的极性共溶剂。本发明采用的纤维素进行活化方法，方法简单，容易操作，无毒无害，绿色环保，并且超临界流体回收方便，可以重复利用，降低生产成本。与化学法相比，其优势在于不会对纤维素的链结构造成破坏，使纤维素降解。由于活化过程使纤维素的结晶度降低、反应性提高，在化学改性过程中，纤维素更易于与试剂进行反应，可有效降低试剂的用量，降低生产成本，且有利于环境保护。