Cellulose nanocrystal blended with carbon nanotube as flexible supercapacitor and diclofenac sodium sensor

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B Pub Date : 2025-09-02 DOI:10.1016/j.mseb.2025.118733

Jiaming Yu, Jinzhi Cao, Kaihuai Duan, Huiyun Hu, Hu Yang, Zhenliang Xu

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Abstract

Cellulose nanocrystals (CNCs) prepared at the optimal condition were blended with carboxyl-functionalized carbon nanotubes (CNTs) as electrode. Molecular simulation revealed a low affinity between CNT and CNC, leading to a loose packing structure with a larger surface area and pore size. The CNC-CNT electrode with a 1:4 ratio showed a capacitance of 68.8 mF/cm², higher than that of CNT. But its water stability is low. Therefore, an amphiphilic acrylate copolymer was synthesized to increase its water stability and make it flexible. The specific capacitance reached 66.7 mF/cm². The flexible supercapacitor device maintained good stability over 2,000 cycles, and exhibited acceptable capacitance across various bending angles. Moreover, CNC-CNT electrode as DFS sensor, exhibited high selectivity, with a linear detection range of 12.5 to 350 µM and a detection limit of 0.034 µM. Overall, this study reveals the potential of CNC-CNT electrode in energy and environmental field.

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纤维素纳米晶体与碳纳米管混合作为柔性超级电容器和双氯芬酸钠传感器

以羧基功能化碳纳米管（CNTs）为电极，在最佳条件下制备纤维素纳米晶体（CNCs）。分子模拟表明，碳纳米管与CNC之间的亲和力较低，导致其具有较大的表面积和孔径的松散堆积结构。1:4比例的CNC-CNT电极的电容值为68.8 mF/cm2，高于CNT。但它的水稳定性很低。因此，合成了一种两亲性丙烯酸酯共聚物，以提高其水稳定性和柔韧性。比电容达到66.7 mF/cm2。该柔性超级电容器器件在2000次循环中保持了良好的稳定性，并且在各种弯曲角度下都表现出可接受的电容。此外，CNC-CNT电极作为DFS传感器具有较高的选择性，线性检测范围为12.5 ~ 350µM，检出限为0.034µM。总之，本研究揭示了CNC-CNT电极在能源和环境领域的潜力。

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来源期刊

Materials Science and Engineering: B 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.