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Rod-like and spherical cellulose I and II nanocrystals prepared through acidified lithium bromide molten salt hydrate treatment

文献类型：期刊论文

作者Wang, Yitong1; Hu, Chuanshuang1; Guan, Litao1; Yun, Hong1; Qi, Wei2; Gu, Jin1
刊名CELLULOSE
出版日期2023-10-28
页码18
关键词Cellulose nanocrystals LiBr molten salt hydrate Formic acid Cellulose I and II
ISSN号0969-0239
DOI10.1007/s10570-023-05567-0
通讯作者Hu, Chuanshuang(cshu@scau.edu.cn) ; Gu, Jin(gujin@scau.edu.cn)
英文摘要To achieve large-scale production of cellulose nanocrystals (CNCs), it is crucial to investigate ecologically and environmentally acceptable solvent systems that can effectively hydrolyze cellulose. Lithium bromide molten salt hydrate (LiBr MSH), as a benign cellulose solvent, is thermally and chemically stable, and recyclable with minimal environmental hazard. In this study, microcrystalline cellulose (MCC, cellulose I) was treated with formic acid-acidified LiBr MSH to yield CNCs. Cellulose I and II nanocrystals with tunable morphologies (rod-like and sphere-like) and high yield (up to 71.5%) were isolated. The concentration of LiBr had the most significant influence on the structure of CNCs. With an increased LiBr concentration from 50 to 56%, the CNC allomorph transitioned from cellulose I to a mixture of cellulose I and II and finally to cellulose II. The rod-like CNCs exhibited decreasing lengths from 398.4 nm to 102.9 nm and ultimately transformed into sphere-like nanoparticles. The resulting CNCs showed an overall high crystallinity (up to 65.9%), high thermal stability (Tmax up to 334.6 degrees C), and good suspension stability (no significant settling within 30 days). Therefore, this work provides an environmentally friendly and effective approach to producing CNCs with adjustable size and allomorph.
WOS关键词TEMPO-MEDIATED OXIDATION ; SULFURIC-ACID HYDROLYSIS ; HIGH-YIELD ; NANOPARTICLES ; DISSOLUTION ; NANOFIBRILS ; SIZE
资助项目This project is financially supported by Guangdong Provincial Department of Science and Technology (Project# 2021A1515010863, 2020A1515111106, 2020B1515420005, and 2022A1515010502) and National Natural Science Foundation of China (Project# 22208116).[2021A1515010863] ; This project is financially supported by Guangdong Provincial Department of Science and Technology (Project# 2021A1515010863, 2020A1515111106, 2020B1515420005, and 2022A1515010502) and National Natural Science Foundation of China (Project# 22208116).[2020A1515111106] ; This project is financially supported by Guangdong Provincial Department of Science and Technology (Project# 2021A1515010863, 2020A1515111106, 2020B1515420005, and 2022A1515010502) and National Natural Science Foundation of China (Project# 22208116).[2020B1515420005] ; This project is financially supported by Guangdong Provincial Department of Science and Technology (Project# 2021A1515010863, 2020A1515111106, 2020B1515420005, and 2022A1515010502) and National Natural Science Foundation of China (Project# 22208116).[2022A1515010502] ; Guangdong Provincial Department of Science and Technology[22208116] ; National Natural Science Foundation of China
WOS研究方向Materials Science ; Polymer Science
语种英语
WOS记录号WOS:001088178900001
出版者SPRINGER
资助机构This project is financially supported by Guangdong Provincial Department of Science and Technology (Project# 2021A1515010863, 2020A1515111106, 2020B1515420005, and 2022A1515010502) and National Natural Science Foundation of China (Project# 22208116). ; Guangdong Provincial Department of Science and Technology ; National Natural Science Foundation of China
源URL[http://ir.giec.ac.cn/handle/344007/40018]  
专题中国科学院广州能源研究所
通讯作者Hu, Chuanshuang; Gu, Jin
作者单位1.South China Agr Univ, Coll Mat & Energy, Key Lab Biobased Mat & Energy, Minist Educ, Guangzhou 510642, Peoples R China
2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy, Guangdong Key Lab New & Renewable Energy Res & Dev, Guangzhou 510640, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Yitong,Hu, Chuanshuang,Guan, Litao,et al. Rod-like and spherical cellulose I and II nanocrystals prepared through acidified lithium bromide molten salt hydrate treatment[J]. CELLULOSE,2023:18.
APA Wang, Yitong,Hu, Chuanshuang,Guan, Litao,Yun, Hong,Qi, Wei,&Gu, Jin.(2023).Rod-like and spherical cellulose I and II nanocrystals prepared through acidified lithium bromide molten salt hydrate treatment.CELLULOSE,18.
MLA Wang, Yitong,et al."Rod-like and spherical cellulose I and II nanocrystals prepared through acidified lithium bromide molten salt hydrate treatment".CELLULOSE (2023):18.

入库方式： OAI收割

来源：广州能源研究所

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