新型炭材料（中英文）2026，Vol.41Issue(4)：1010-1025,16.DOI:10.1016/S1872-5805(26)61103-1
双向冷冻四足氧化锌桥联碳气凝胶用于高性能压力传感
A bidirectionally frozen carbon aerogel reinforced by tetrapod ZnO bridges for high-performance pressure sensing
王一臣 1所放 2本祎航 1郭瑞 3姚永涛 2刘镇波1
作者信息
- 1. 东北林业大学 生物质材料科学与技术教育部重点实验室,黑龙江 哈尔滨 150040
- 2. 哈尔滨工业大学 特种环境复合材料技术国家级重点实验室,黑龙江 哈尔滨 150080
- 3. 上海空间电源研究所 空间电源国家重点实验室,上海 200245
- 折叠
摘要
Abstract
The development of flexible pressure sensors that simultaneously achieve high sensitivity,mechanical strength,and long-term stability remains challenging,particularly for biomass-de-rived carbon aerogels that are intrinsic-ally brittle and prone to structural collapse.We have used bidirectional freezing to reorganize randomly distributed cellulose nanofibers,pre-synthesized nitrogen-doped carbon nanosheets,and tetrapod-shaped ZnO whiskers(T-ZnOWs)into a mechanic-ally stable load-bearing network of parallel layers.T-ZnOWs were incorporated as rigid interlayer pillars bridging adjacent car-bon lamellae,forming a mechanically stable"layer-support"structure that enables efficient and directional stress transfer while suppressing interlayer slippage and structural instability,thereby promoting cooperative deformation of the lamellar units.The nitrogen-doped carbon nanosheets introduce defect-rich conductive paths that increase the piezoresistive response,while the T-ZnOWs function as both rigid interlayer pillars and piezoelectric activation units.Because of the modulus mismatch between the supports and carbon layers,any applied stress is preferentially concentrated at the layer/support interfaces,generating local-ized high-stress regions.Consequently,small mechanical stimuli induce pronounced electrical resistance changes,resulting in an amplified electrical signal.To improve the device durability,it was infiltrated with polydimethylsiloxane(PDMS)to form a conformal elastic encapsulating layer.The resulting aerogel sensor has a high gauge factor of 34.4,an ultrahigh sensitivity of 248.41 kPa-1 over a broad pressure range(0-19 kPa),fast response(24 ms)and recovery(69 ms)times and stable operation over 5000 loading-unloading cycles.The sensor reliably detects physiological signals and joint motions,demonstrating its po-tential for wearable and intelligent sensing applications.This work provides a way to improve the mechanical reliability and sensing performance of biomass-derived carbon aerogels.关键词
纤维素衍生碳气凝胶/分级多孔结构/结构工程/可穿戴传感器Key words
Cellulose-derived carbon aerogels/Hierarchical porous structure/Structural engineering/Wearable sensors分类
通用工业技术引用本文复制引用
王一臣,所放,本祎航,郭瑞,姚永涛,刘镇波..双向冷冻四足氧化锌桥联碳气凝胶用于高性能压力传感[J].新型炭材料（中英文）,2026,41(4):1010-1025,16.
