Novel cellulose nanocrystal modified material for preparing transparent film and preparation method thereof

• Main Authors: YU YAN, CHEN QIFAN, LIN JIE, CHENG DEHONG, HUANG FENGYUAN, WU XIAOJIE, YU ZHICAI, LIU ZHIMEI, LU YANHUA
• Format: Patent
• Language: Chinese; English
• Published: 01.02.2017
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DERIVATIVES THEREOF; GENERAL PROCESSES OF COMPOUNDING; 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; WORKING-UP

The invention provides a novel cellulose nanocrystal modified material for preparing a transparent film and a preparation method thereof. In the preparation method, trifluoroacetic anhydride and long-chain fatty acid form an acylation reagent which is esterified with a cellulose nanocrystal to obtain the novel cellulose nanocrystal modified material. The technical aim of preparing a film forming material directly by use of the cellulose nanocrystal is achieved. The modified material has good solubility in organic solvents such as dichloromethane and chloroform; the prepared film has the characteristics of high tensile strength and breaking strength, good light transmission and good oxygen barrier property; and particularly, in a high-humidity environment, the film formed by the cellulose nanocrystal modified material still has good mechanical properties. 本发明申请提供了种制备透明薄膜用之新型纤维素纳米晶体改性材料及其制备方法。本制备方法由三氟乙酸酐和长链脂肪酸组成酰化试剂，与纤维素纳米晶体酯化制备获得，实现了直接采用纤维素纳米晶体来制取成膜材料的技术目的，该改性材料具有溶解于二氯甲烷、氯仿等有机溶剂的优良溶解特性，制备得到的薄膜具有拉伸强度和断裂强度高、透光性好