Recyclable Universal Solvents for Chitin to Chitosan with Various Degrees of Acetylation and Construction of Robust Hydrogels

doi:10.1021/acssuschemeng.6b03055

CORC > 武汉物理与数学研究所 > 中国科学院武汉物理与数学研究所 > 磁共振基础研究部

	Recyclable Universal Solvents for Chitin to Chitosan with Various Degrees of Acetylation and Construction of Robust Hydrogels
	Zhang, Lina 1,2; Lu, Ang 1; Fang, Yan 1; Zhang, Rongrong 1; Duan, Bo 1; Liu, Maili 3
刊名	ACS SUSTAINABLE CHEMISTRY & ENGINEERING
	2017-03-01
卷号	5 期号:3 页码:2725-2733
关键词	Chitin Chitosan Universal Solvents Green Transformation Recycling Of Wastewater
DOI	10.1021/acssuschemeng.6b03055
文献子类	Article
英文摘要	Chitin and chitosan are enticing natural polymers derived from seafood wastes, and their applications mostly depend on the degree of acetylation (DA). For their efficient utilization, a series of universal solvents for the direct dissolution from chitin to chitosan with various DA ranged from 5 to 94% were designed, and robust hydrogels were constructed from their solution-via a physical regeneration, for the first time. The NMR results demonstrated that K+ of KOH interacted easily with C=0 group to break the (NHO)-O-center dot center dot center dot=C intermolecular hydrogen bonds of chitin, whereas Li+ of LiOH could bound with NH2 group to promote the destruction of NH(center dot center dot center dot)06 hydrogen bonds of chitosan. Thus, a series of LiOH/KOH/urea aqueous solutions with weight ratios of LiOH to KOH from 0 to 2.5 were developed to directly dissolve these biomacromolecules with DAs ranging from 5 to 94%. Subsequently, a series of coagulants were also exploited for the regeneration of these chitin/chitosan solutions to construct the robust hydrogels with different DAs. These chitin/chitosan hydrogels exhibited homogeneous network structure consisting of nanofibers with a mean diameter of similar to 30 nm as well as excellent mechanical properties and high transparency. By adding a fluorescent agent with strong affinity with only the-NH2 group, the resulting fluorescent hydrogels with different DAs could be visually recognized because the intensity reflected the different contents of the active amino group. Furthermore, the wastewater after regeneration could be easily recycled via reduced pressure distillation to reuse without consuming any chemicals or producing byproducts, leading to a thoroughly green process. This work opens a new avenue for dissolving biomacromolecules from chitin to chitosan via universal solvents and to construct new materials via green transformation, which would be beneficial for global sustainable development.
WOS关键词	NAOH/UREA AQUEOUS-SOLUTION ; N-ACETYLATION ; IN-VITRO ; STRENGTH ; FIBERS ; FILMS ; DEACETYLATION ; BIOREFINERY ; NANOFIBERS ; NETWORKS
WOS研究方向	Chemistry ; Engineering
语种	英语
WOS记录号	WOS:000395846900076
资助机构	Major Program of National Natural Science Foundation of China(21334005) ; Major Program of National Natural Science Foundation of China(21334005) ; Major International (Regional) Joint Research Project of National Natural Science Foundation of China(21620102004) ; Major International (Regional) Joint Research Project of National Natural Science Foundation of China(21620102004) ; National Natural Science Foundation of China(51203122 ; National Natural Science Foundation of China(51203122 ; Fundamental Research Funds for the Central Universities(2015203020202) ; Fundamental Research Funds for the Central Universities(2015203020202) ; 51573143 ; 51573143 ; 20874079) ; 20874079) ; Major Program of National Natural Science Foundation of China(21334005) ; Major Program of National Natural Science Foundation of China(21334005) ; Major International (Regional) Joint Research Project of National Natural Science Foundation of China(21620102004) ; Major International (Regional) Joint Research Project of National Natural Science Foundation of China(21620102004) ; National Natural Science Foundation of China(51203122 ; National Natural Science Foundation of China(51203122 ; Fundamental Research Funds for the Central Universities(2015203020202) ; Fundamental Research Funds for the Central Universities(2015203020202) ; 51573143 ; 51573143 ; 20874079) ; 20874079)
内容类型	期刊论文
源URL	[http://ir.wipm.ac.cn/handle/112942/10891]
专题	武汉物理与数学研究所_磁共振基础研究部
作者单位	1.Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China 2.Guangxi Univ, Sch Chem & Chem Engn, Nanning 530004, Peoples R China 3.Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Mol Phys, Wuhan 430071, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Lina,Lu, Ang,Fang, Yan,et al. Recyclable Universal Solvents for Chitin to Chitosan with Various Degrees of Acetylation and Construction of Robust Hydrogels[J]. ACS SUSTAINABLE CHEMISTRY & ENGINEERING,2017,5(3):2725-2733.
APA	Zhang, Lina,Lu, Ang,Fang, Yan,Zhang, Rongrong,Duan, Bo,&Liu, Maili.(2017).Recyclable Universal Solvents for Chitin to Chitosan with Various Degrees of Acetylation and Construction of Robust Hydrogels.ACS SUSTAINABLE CHEMISTRY & ENGINEERING,5(3),2725-2733.
MLA	Zhang, Lina,et al."Recyclable Universal Solvents for Chitin to Chitosan with Various Degrees of Acetylation and Construction of Robust Hydrogels".ACS SUSTAINABLE CHEMISTRY & ENGINEERING 5.3(2017):2725-2733.