高压均质处理次数对桉木纤维素纳米纤丝性能的影响  

Effects of High-pressure Homogenization Times on Properties of Eucalyptus Cellulose Nanofibrils

作　　者：戢德贤 颜家强 陈嘉川[1] 林兆云 杨桂花[1] 和铭 吉兴香[1] JI Dexian;YAN Jiaqiang;CHEN Jiachuan;LIN Zhaoyun;YANG Guihua;HE Ming;JI Xingxiang(State Key Lab of Bio-based Material and Green Papermaking/Key Lab of Pulp and Paper Science&Technology of Ministry of Education,Qilu University of Technology(Shandong Academy of Sciences),Ji’nan,Shandong Province,250353)

机构地区：[1]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/制浆造纸科学与技术教育部重点实验室,山东济南250353

出　　处：《中国造纸》2022年第10期8-15,共8页China Pulp & Paper

基　　金：山东省重点研发计划项目(2021CXGC010601,2019JZZY010326,2019JZZY010328);国家高端外国专家引进计划(G2021024005L);生物基材料与绿色造纸国家重点实验室开放课题项目(ZZ20190205);泰山学者工程。

摘　　要：采用超微粒研磨技术对漂白桉木浆进行研磨预处理,再利用高压均质技术制备纤维素纳米纤丝(CNF),探讨了高压均质处理对CNF结构及性能的影响。结果表明,增加高压均质次数有利于提高CNF的尺寸均一性及其悬浮液的稳定性;当高压均质处理20次时,CNF的Zeta电位达−29.4mV,直径50~100nm,长度1500~2000nm,悬浮液稳定性较好;且制备的CNF膜保留了较强的亲水性,与水接触90s后接触角仅30.8°。Bleached eucalyptus pulp was pretreated with ultrafine grinding technology,and then high-pressure homogenized to produce cellulose nanofibrils(CNF).Herein,the effect of high-pressure homogenization on the structure and properties of CNF was investigated.The results showed that the size uniformity of CNF and the stability of its suspension improved with times of high-pressure homogenization increased.When the pulp was high-pressure homogenizated for 20 times,the CNF with Zeta potential of−29.4 mV was obtained,of which the diameter and length were 50~100 nm and 1500~2000 nm,respectively.The CNF suspension demonstrated better stability and the prepared CNF film remained strong hydrophilicity with contact angle of only 30.8°after contacting with water for 90 s.

关 键 词：纤维素纳米纤丝 桉木 高压均质 研磨预处理 

分 类 号：TS721.1[轻工技术与工程—制浆造纸工程]