Ultrasensitive Piezoelectric Sensor based on Polyimide Foam for Sound Recognition and Motion Monitoring

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Фев. 7, 2025

The ultrasensitive piezoelectric sensors with the capability of sound recognition have attracted extensive attention due to their unique characteristics. However, fabrication acoustic favorable flexibility and sensitivity via simple controllable methods remains a significant challenge. Herein, an adaptive sensor based on polyimide (PI) composite foams containing fluorine groups is developed. uniform porous morphology endows foam-based remarkable 0.9536 V/N over broad pressure range (2.5–12.5 N), rapid response recovery times (18 15 ms, respectively), outstanding durability (over 19,000 cycles). Moreover, are capable effectively monitoring human motions, generated output voltages reached ∼30 V for practical applications as intelligent household devices. In particular, exhibit excellent detecting wide sounds, indicating exceptional sensitivity. This work offers promising opportunities design development high-performance recognition, motion monitoring, self-powered wearable devices in extreme environments.

Язык: Английский

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Chemical Imidization Enables Polyimide Aerogels with Topological Porous Hierarchy and Ultralow Thermal Conductivity

ACS Applied Polymer Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 4, 2025

Polyimide (PI) aerogel with high thermal stability and low conductivity exhibits significant application value in the aerospace field. Nevertheless, traditional preparation methods of PI face challenges a complicated manufacturing process mechanical strength, which severely restrict their industrial scalability. Herein, series aerogels stable topological porous hierarchy were designed fabricated through synergistic chemical imidization salt template strategies. This is composed micropores sizes 5–15 μm macropores 200 μm–1000 μm, respectively. The show lightweight (0.03–0.06 g/cm3), exceptional flame-retardant properties. In particular, ultralow 0.028 W/(m·K), demonstrating outstanding insulation characteristics. Moreover, conductive PI@PPy composite by depositing pyrrole (PPy) within matrix aerogels, potential applications as flexible piezoresistive sensors photothermal conversion devices investigated. prepared demonstrate great fields microelectronics.

Язык: Английский

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Advanced Textiles Inspired by Leaf Structure for Enhanced Personal Electromagnetic Protection and Thermal Management

ACS Applied Nano Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 27, 2025

In response to the growing challenges posed by increasingly severe electromagnetic radiation environments and diverse personal thermoregulation requirements, development of wearable devices integrating interference (EMI) shielding thermal management functionalities has become critical for enhancing human comfort safety. Inspired hierarchical structure natural leaves, we present a multifunctional material composed MXene/polyaniline (PANI)/polydopamine (PDA) on flexible activated carbon fabric (ACC) substrate. This is fabricated through facile yet efficient mixed-dimensional assembly strategy, combining two-dimensional (2D) MXene nanosheets with one-dimensional (1D) PANI. The architecture mimics biological ACC serving as robust xylem-like substrate, PANI acting phloem-like supporting layer, forming protective outer layer. amino groups ( (−NH2) function binding sites, facilitating formation hydrogen bonds both PDA MXene, thereby interfacial adhesion mechanical stability. Furthermore, synergistic combination PANI's inherent conductivity MXene's exceptional electrical properties significantly improves overall conductive network fabric. resulting MXene/PANI/PDA@ACC (MPPA) demonstrates outstanding performance, including high (384.6 S/m), superior EMI effectiveness (average 45.81 dB), Joule heating (reaching 94 °C at 5 V), excellent camouflage capabilities (infrared emissivity 0.421). Notably, retains flexibility, durability, breathability, moisture permeability, ensuring even under complex environmental conditions. These combined position MPPA promising candidate next-generation technologies, addressing dual demands protection adaptive management.

Язык: Английский

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Piezoelectric spray for rapid fabrication of self-powered sensor based on sustainable textiles

Composites Part A Applied Science and Manufacturing, Год журнала: 2025, Номер unknown, С. 108979 - 108979

Опубликована: Апрель 1, 2025

Язык: Английский

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Polyimide composite fiber containing fluorine for respiratory monitoring and wearable electronics

Polymer, Год журнала: 2025, Номер unknown, С. 128479 - 128479

Опубликована: Май 1, 2025

Язык: Английский

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