Wide-detection-range, highly-sensitive, environmental-friendly and flexible cellulose-based capacitive humidity sensor

IF 10.7 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers Pub Date : 2025-03-18 DOI:10.1016/j.carbpol.2025.123507

Cheng Huang , Junhao Chen , Yingao Zhang , Chuanyu Jiang , Yongjing Wang , Jiaxiao Qi , Haodong Yang , Kaizheng Gao , Ming Jiang , Feihua Liu

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引用次数: 0

Abstract

Humidity sensors are widely used in industries, agriculture, climate control, and health monitoring, especially in flexible, environmentally friendly wearable electronics. However, existing sensors often suffer from limited detection ranges and low sensitivity. This work reports a flexible, environmentally friendly, highly sensitive humidity sensor with a wide detection range, which is made of cellulose, MXene, and sodium polyacrylate via vacuum filtration and impregnation method. The abundant polar functional groups of the materials enable humidity sensing across a broad range. This study reveals the significant enhancement in sensitivity of capacitive humidity sensors through the construction of multiple water layers that create proton and ion transport channels. The sensor shows a wide detection range (10 % RH to 90 % RH), low hysteresis (1.42 %), sensitivity of 2.11 pF/%RH (10 % RH to 41 % RH), and high sensitivity of 60.97 pF/%RH (41 % RH to 84 % RH). Additionally, it can distinguish breathing patterns and rates, enabling both non-contact and contact sensing, with potential applications in health monitoring. This work offers new insights into the development of flexible, environmentally friendly capacitive humidity sensors with high sensitivity and wide detection ranges.

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来源期刊

Carbohydrate Polymers 化学-高分子科学

CiteScore

22.40

自引率

8.00%

发文量

1286

审稿时长

47 days

期刊介绍： Carbohydrate Polymers stands as a prominent journal in the glycoscience field, dedicated to exploring and harnessing the potential of polysaccharides with applications spanning bioenergy, bioplastics, biomaterials, biorefining, chemistry, drug delivery, food, health, nanotechnology, packaging, paper, pharmaceuticals, medicine, oil recovery, textiles, tissue engineering, wood, and various aspects of glycoscience. The journal emphasizes the central role of well-characterized carbohydrate polymers, highlighting their significance as the primary focus rather than a peripheral topic. Each paper must prominently feature at least one named carbohydrate polymer, evident in both citation and title, with a commitment to innovative research that advances scientific knowledge.