杉木幼龄材和成熟材纤维素纳米晶体的制备及其性能  

Preparation and Properties of Cellulose Nanocrystals from Juvenile and Mature Wood of Chinese Fir

作　　者：郭旭霞[1] 郭娟[1] 殷亚方[1] 

机构地区：[1]中国林业科学研究院,北京100091

出　　处：《东北林业大学学报》2015年第10期103-108,共6页Journal of Northeast Forestry University

基　　金：中央级公益性科研院所基本科研业务费专项(CAFINT2013C08)

摘　　要：选取我国主要商品材树种杉木（Cunninghamia lanceolata（Lamb.）Hook.）为原料,采用超声波辅助硫酸水解法制备纤维素纳米晶体（CNCs）,系统研究幼龄材和成熟材CNCs的形貌和尺寸、结晶度、热稳定性及表面Zeta电位等性能。结果表明,采用分段超声辅助硫酸水解法,制备出呈棒状外观形貌的CNC,长度分布范围为50.1~84.6 nm。宽度分布范围为5.4~7.6 nm。幼龄材和成熟材CNC性能间存在差异,相对于幼龄材CNC,成熟材CNC尺寸及离散性较小,结晶度高,热稳定性较好。水解过程中超声波的应用、m（纤维素）∶m（硫酸）的增大及水解时间的延长均可影响幼龄材CNC和成熟材CNC的尺寸及均匀性和结晶度。Cellulose nanocrystals（ CNCs） were isolated from both juvenile wood and mature wood of Chinese fir（ Cunninghamia lanceolata（ Lamb.） Hook.） by using the sulfuric acid hydrolysis under ultrasonic treatment,respectively. The properties of morphology,crystallinity,thermal property and Zeta potential of juvenile CNCs（ CNC- J） and mature CNCs（ CNC-M） were investigated. The particle-sized CNC can be prepared by using the sulfuric acid hydrolysis under ultrasonic treatment,and the length of CNC varied in 50. 1- 84. 6 nm,while the width range of CNC was in 5. 4- 7. 6 nm. There were differences between CNC- J and CNC- M. CNC- M has smaller size with narrower distribution range,higher crystallinity and better thermal stability in comparison with CNC- J. The hydrolysis conditions containing ultrasound treatment,hydrolysis time,and cellulose-to-acid ratio had effects on CNCs properties including size and crystallinity.

关 键 词：纤维素纳米晶体 幼龄材 成熟材 结构性能 热力学性能 

分 类 号：S781.4[农业科学—木材科学与技术] TQ353[农业科学—林学]