期刊
ADVANCED SCIENCE
卷 9, 期 16, 页码 -出版社
WILEY
DOI: 10.1002/advs.202201287
关键词
chitin nanoribbons; pseudosolvent; self-exfoliation; single molecular layer; sub-nanometric materials
资金
- National Natural Science Foundation of China [52173096, 52103126]
- Open Foundation of Key Laboratory for Deep Processing of Major Grain and Oil (Wuhan Polytechnic University) [2019GYBQGDKFA02]
This study demonstrates a low-cost and scalable method for directly exfoliating chitin SNMs from their natural sources, leading to the discovery of their versatile and intriguing properties. This provides new opportunities for the high value-added utilization of chitin and the study of organic SNMs.
Sub-nanometric materials (SNMs) represent a series of unprecedented size-/morphology-related properties applicable in theoretical research and diverse cutting-edge applications. However, in-depth investigation and wide utilization of organic SNMs are frequently hindered, owing to the complex synthesis procedures, insufficient colloidal stability, poor processability, and high cost. In this work, a low-cost, energy-efficient, convenient, effective, and scalable method is demonstrated for directly exfoliating chitin SNMs from their natural sources through a one-pot tandem molecular intercalation process. The resultant solution-like sample, which exhibits ribbon-like feature and contains more than 85% of the single molecular layer (thickness <0.6 nm), is capable of being solution-processed to different types of materials. Thanks to the sub-nanometric size and rich surface functional groups, chitin SNMs reveal versatile intriguing properties that rarely observe in their nano-counterparts (nanofibrils), e.g., crystallization-like assembly in the colloidal state and alcoplasticity/self-adhesiveness in the bulk aggregate state. The finding in this work not only opens a new avenue for the high value-added utilization of chitin, but also provides a new platform for both the theoretical study and practical applications of organic SNMs.
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