γ-戊内酯/水体系预处理竹屑制备L-CNF的研究  

Preparation of L-CNF from Bamboo Sawdust Pretreated withγ-Valerolactone/Water System

作　　者：王欣雨 罗清 李燕 华飞果 戴磊 WANG Xinyu;LUO Qing;LI Yan;HUA Feiguo;DAI Lei(College of Bioresources Chemical and Materials Engineering,National Demonstration Center for Experimental Light Chemistry Engineering Education,Shaanxi University of Science&Technology,Xi’an,Shaanxi Province,710021;Longyou Inspection and Testing Research Institute,Quzhou,Zhejiang Province,324404;Zhejiang Jinjiahao Green Nanomaterials Co.,Ltd.,Quzhou,Zhejiang Province,324404;Key Lab of Ecological Textile,Ministry of Education,College of Textile Science and Engineering,Jiangnan University,Wuxi,Jiangsu Province,214122)

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,陕西西安710021 [2]龙游县检验检测研究院,浙江衢州324404 [3]浙江金加浩绿色纳米材料股份有限公司,浙江衢州324404 [4]江南大学纺织科学与工程学院,生态纺织教育部重点实验室,江苏无锡214122

出　　处：《中国造纸》2025年第1期1-11,共11页China Pulp & Paper

基　　金：国家自然科学基金项目(31901265,22178208);衢州市科技计划项目(2022K02)。

摘　　要：以废竹屑为原料,利用γ-戊内酯(GVL)/水体系预处理结合温和的均质处理,制备了含木质素的纳米纤维素(L-CNF),并探究了反应温度、反应时间、GVL与水的质量比等因素对竹屑纤维的理化性质和木质素含量的影响,并优化制备条件。结果表明,GVL/水体系预处理竹屑并未使纤维结构发生改变,纤维素的初级结晶结构仍保留,木质素含量降低。GVL/水体系预处理竹屑的最佳反应条件为反应温度140℃、反应时间10 h、GVL和水质量比4∶1,在此条件下成功制备了具有纳米尺寸(平均粒径(15.4±4)nm)和较高紫外屏蔽性能(在UVA和UVB区段紫外屏蔽率均在90%以上)的L-CNF。Lignin-containing cellulose nanofibrils(L-CNF)was prepared from waste bamboo sawdust usingγ-valerolactone(GVL)/water system pretreatment combined with mild homogenization.The effects of reaction temperature,reaction time,and mass ratio of GVL to water on the physicochemical properties and lignin content of the bamboo sawdust fiber were investigated,and ultimately the preparation conditions were optimized.The results showed that the pretreatment of bamboo sawdust with GVL/water system did not change the structure of fibers,the primary crystalline structure of cellulose was still retained,and the lignin content was reduced.The optimum reaction conditions for the pretreatment of bamboo sawdust with GVL/water system were that reaction temperature of 140℃,the reaction time of 10 h,and the mass ratio of GVL to water of 4∶1,under which L-CNF with nano-size(the average particle size of(15.4±4)nm)and high UV shielding performance(UV shielding rate of more than 90%in both the UVA and UVB bands)were obtained.

关 键 词：竹屑 γ-戊内酯 木质素 紫外屏蔽 

分 类 号：TS7[轻工技术与工程—制浆造纸工程]