材料科学
碳化
复合数
壳聚糖
结晶
复合材料
多孔性
气凝胶
纳米晶
化学工程
纤维素
比表面积
纳米技术
化学
催化作用
工程类
生物化学
扫描电子显微镜
作者
So Yeon Ahn,Chengbin Yu,Young Seok Song
出处
期刊:Polymers
[Multidisciplinary Digital Publishing Institute]
日期:2023-08-18
卷期号:15 (16): 3454-3454
被引量:1
标识
DOI:10.3390/polym15163454
摘要
In this study, we fabricated a cellulose nanocrystal (CNC)-embedded aerogel-like chitosan foam and carbonized the 3D foam for electrical energy harvesting. The nanocrystal-supported cellulose foam can demonstrate a high surface area and porosity, homogeneous size ranging from various microscales, and a high quality of absorbing external additives. In order to prepare CNC, microcrystalline cellulose (MCC) was chemically treated with sulfuric acid. The CNC incorporates into chitosan, enhancing mechanical properties, crystallization, and generation of the aerogel-like porous structure. The weight percentage of the CNC was 2 wt% in the chitosan composite. The CNC/chitosan foam is produced using the freeze-drying method, and the CNC-embedded CNC/chitosan foam has been carbonized. We found that the degree of crystallization of carbon structure increased, including the CNCs. Both CNC and chitosan are degradable materials when CNC includes chitosan, which can form a high surface area with some typical surface-related morphology. The electrical cyclic voltammetric result shows that the vertical composite specimen had superior electrochemical properties compared to the horizontal composite specimen. In addition, the BET measurement indicated that the CNC/chitosan foam possessed a high porosity, especially mesopores with layer structures. At the same time, the carbonized CNC led to a significant increase in the portion of micropore.
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