中国造纸学报Issue(2)：1-6,6.
木素对TEMPO氧化竹浆制备纳米纤维素的影响
Effect of Lignin on Nanocellulose Preparation by TEMPO-mediated Oxidation from Bamboo Pulp
摘要
Abstract
TEMPO-oxidation cellulose nanofibers (TOCNs) were prepared from unbleached kraft bamboo pulps (SHK,Kappa No.=25.5;SLK,Kappa No.=11.7) by means of TEMPO/NaBr/NaC1O oxidation and subsequent homogenization.The TOCN films were prepared by vacuum filtration.During the TEMPO-oxidation processes,the properties of TEMPO oxidized pulps,TOCNs and TOCN films of SHK and SLK were compared,the effect of lignin on TEMPO-oxidation process and TOCN production was studied.Results showed that the TEMPO-oxidation rate of SHK was faster than SLK,but the carboxyl content of SLK-TEMPO oxidized pulp was 1.01 mmol/g,much higher than SHK-TEMPO oxidized pulp (0.89 mmol/g).The obtained TOCNs exhibited a fibril-like structure,with a narrow width ranging from 5 nm to 8 nm and a high aspect ratio (＞ 100),and the TOCNs were cellulose-I.The suspension transparency and crystalline index of SLK-TOCN were higher than SHK-TOCN.The two kinds of TOCN films displayed good optical and mechanical performance,and the Yong's modules,tensile strength,and the elongation of SLK-TOCN film were 2.6 GPa,92 MPa,and 10.9％,respectively,all of them were higher than the SHK-TOCN film which were 2.4 GPa,90 MPa,and 8.7％,respectively.关键词
未漂竹浆/TEMPO氧化/纳米纤维素/薄膜/强度Key words
unbleached kraft bamboo pulp/TEMPO oxidation/nanocellulose/films/strength分类
轻工纺织引用本文复制引用
杜超,李海龙,蒙启骏,刘梦茹,詹怀宇..木素对TEMPO氧化竹浆制备纳米纤维素的影响[J].中国造纸学报,2017,(2):1-6,6.基金项目
广东省科技计划项目(2015A020215007) （2015A020215007）
国家自然科学基金项目(31370585) （31370585）
中央高校基本科研业务费专项资金项目(2015ZZ048,2015ZM054). （2015ZZ048,2015ZM054）
