本文二维码信息
二维码(扫一下试试看!)
脱水过程中纤维素纳米纤丝微观结构的研究
Study on the Microstructure of Cellulose Nanofibril During Dehydration
收稿日期:2021-09-19  
DOI:10.11980/j.issn.0254-508X.2022.04.010
关键词:  纤维素纳米纤丝  脱水  再分散性  自组装
Key Words:cellulose nanofibril  dehydration  re-dispersibility  self-assembly
基金项目:国家重点研发计划(2020YFC1910301);山东省科教产融合创新试点工程项目(2020KJC-ZD06)。
作者单位邮编
杨硕 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 山东济南250353 250353
李梓源 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 山东济南250353 250353
丁其军 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 山东济南250353 250353
娄江 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 山东济南250353 250353
韩文佳* 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 山东济南250353 250353
摘要点击次数: 2333
全文下载次数: 1332
摘要:本研究首先制备了不同固含量的纤维素纳米纤丝(CNF),探究脱水程度对CNF再分散性的影响及其微观结构的变化。结果表明,由于CNF发生团聚并引起分子间/内氢键的重组,其再分散性受到影响。随脱水程度的增加,当CNF固含量由20.21%提高至41.88%时,Zeta电位迅速下降6.3 mV,其稳定性下降;当CNF固含量由2.38%提高至100%时,其透光率下降至43%,结晶度和晶粒尺寸分别提高50.31%和1.4倍,其再分散性降低。综合分析发现,CNF固含量控制在20%以下,对其微观结构和再分散性的影响较小。
Abstract:In this study, cellulose nanofibril (CNF) with different solid contents after thermal drying were used to investigate the effect of dehydration degree on the re-dispersibility of CNF and their microstructure changes. The results showed that the re-dispersibility of CNF was affected due to the agglomeration of CNF and causing reorganization of inter/intra molecular hydrogen bonds. With the increase of dehydration degree, when CNF solid content increased from 20.21% to 41.88%, the Zeta potential decreased by 6.3 mV, and its stability decreased. When CNF solid content increased from 2.38% to 100%, the transmittance decreased to 43%, the crystallinity and grain size increased by 50.31% and 1.4 times, respectively, whereas its re-dispersibility decreased. Comprehensive analysis found that the solid content of CNF was less than 20%, which had little effect on its microstructwre and re-dispersibility.
查看全文  HTML  查看/发表评论  下载PDF阅读器