高透气性能CNF/环状拓扑形貌CNC复合薄膜的制备与性能研究  

Prepared and Properties of High-permeability CNF/Ring-topologically CNC Composite Film

作　　者：杜鹏 徐永建 李雯晶 古时力 DU Peng;XU Yongjian;LI Wenjing;GU Shili(College of Bioresources Chemical and Materials Engineering,National Demonstration Center for Experimental Light Chemistry Engineering Education,Key Lab of Paper Based Functional Materials of China National Light Industry,Shaanxi Province Key Lab of Papermaking Technology and Specialty Paper,Shaanxi University of Science&Technology,Xi’an,Shaanxi Province,710021)

机构地区：[1]陕西科技大学轻工科学与工程学院,轻化工程国家级实验教学示范中心,中国轻工业纸基功能材料重点实验室,陕西省造纸技术及特种纸品开发重点实验室,陕西西安710021

出　　处：《中国造纸》2023年第5期37-42,125,共7页China Pulp & Paper

基　　金：齐鲁工业大学(山东省科学院)生物基材料与绿色造纸国家重点实验室开放基金资助项目(GZKF202040)。

摘　　要：通过硫酸水解法及高强超声处理获得具有中空环状拓扑形貌的纤维素纳米晶体(RT-CNC),并采用真空抽滤法制备了纤维素纳米纤丝(CNF)/RT-CNC薄膜。结果表明,RT-RNC的环壁宽度约为3.5 nm,长度为10~50 nm,具有明显中空特性,其成膜过程中化学结构并未改变且保持纤维素Ⅰ结晶结构;CNF/RT-CNC薄膜的透气度为6.70μm/(Pa·s),相较于CNF薄膜(2.50μm/(Pa·s))提高了168%,且其热降解性能良好。In this study,ring-topologically cellulose nanocrystal(RT-CNC)was obtained by concentrated sulfuric acid method and high-intensity ultrasonic treatment,and cellulose nanofibril(CNF)/RT-CNC films were prepared by vacuum filtration.The results showed that the ring-wall width and the length of RT-RNC were 3.5 nm and 10-50 nm,respectively,and its had significant hollow feature.The chemical structure of RT-CNC did not change and maintained the crystalline structure of cellulose I during the film formation process.The air permeability of CNF/RT-CNC film was 6.70μm/(Pa·s),which was increased by 168% compared with that of CNF film(2.50μm/(Pa·s)).In addition,the CNF/RT-CNC film had the best thermal degradation performance.

关 键 词：纤维素纳米纤丝 棒状纤维素纳米晶体 中空环状拓扑形貌纤维素纳米晶体 透气性能 力学性能 

分 类 号：TS721[轻工技术与工程—制浆造纸工程]