Self‐Adhesive Polydimethylsiloxane Foam Materials Decorated with MXene/Cellulose Nanofiber Interconnected Network for Versatile Functionalities

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(48)

Published: July 17, 2023

Abstract Polydimethylsiloxanes (PDMS) foam as one of next‐generation polymer materials shows poor surface adhesion and limited functionality, which greatly restricts its potential applications. Fabrication advanced PDMS with multiple functionalities remains a critical challenge. In this study, unprecedented self‐adhesive are reported worm‐like rough structure reactive groups for fabricating multifunctional nanocomposites decorated MXene/cellulose nanofiber (MXene/CNF) interconnected network by facile silicone foaming dip‐coating strategy followed silane modification. Interestingly, such produces strong interfacial the hybrid MXene/CNF nano‐coatings. Consequently, optimized have excellent super‐hydrophobicity (water contact angle ≈159 o ), tunable electrical conductivity (from 10 −8 to S m −1 stable compressive cyclic reliability in both wide‐temperature range −20 200 C) complex environments (acid, sodium, alkali conditions), outstanding flame resistance (LOI value >27% low smoke production rate), good thermal insulating performance reliable strain sensing various stress modes environmental conditions. It provides new route rational design development versatile multifunctionalities promising applications intelligent healthcare monitoring fire‐safe insulation.

Language: Английский

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Hyperelastic, Robust, Fire‐Safe Multifunctional MXene Aerogels with Unprecedented Electromagnetic Interference Shielding Efficiency

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(49)

Published: Sept. 5, 2023

Abstract MXene aerogels have shown great potential for many important functional applications, in particular electromagnetic interference (EMI) shielding. However, it has been a grand challenge to create mechanically hyperelastic, air‐stable, and durable enabling effective EMI protection at low concentrations due the difficulties achieving tailorable porous structures, excellent mechanical elasticity, desired antioxidation capabilities of air. Here, facile strategy fabricating composite by co‐assembling cellulose nanofibers during freeze‐drying followed surface encapsulation with fire‐retardant thermoplastic polyurethane (TPU) is reported. Because maximum utilization pore structures MXene, conductive loss enhanced multiple internal reflections, as‐prepared aerogel 3.14 wt% exhibits an exceptionally high shielding effectiveness 93.5 dB, ultra‐high efficiency 2977.71 dB g −1 , tripling values previous works. Owing presence hydrogen bonding TPU elastomer, hyperelastic feature additional strength, stability, superior durability, fire safety. This study provides creating multifunctional applications protection, wearable devices, thermal management, pressure sensing, intelligent monitoring.

Language: Английский

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Flexible and Robust Functionalized Boron Nitride/Poly(p-Phenylene Benzobisoxazole) Nanocomposite Paper with High Thermal Conductivity and Outstanding Electrical Insulation

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 16(1)

Published: Nov. 30, 2023

With the rapid development of 5G information technology, thermal conductivity/dissipation problems highly integrated electronic devices and electrical equipment are becoming prominent. In this work, "high-temperature solid-phase & diazonium salt decomposition" method is carried out to prepare benzidine-functionalized boron nitride (m-BN). Subsequently, m-BN/poly(p-phenylene benzobisoxazole) nanofiber (PNF) nanocomposite paper with nacre-mimetic layered structures prepared via sol-gel film transformation approach. The obtained m-BN/PNF 50 wt% m-BN presents excellent conductivity, incredible insulation, outstanding mechanical properties stability, due construction extensive hydrogen bonds π-π interactions between PNF, stable structures. Its λ∥ λ⊥ 9.68 0.84 W m-1 K-1, volume resistivity breakdown strength as high 2.3 × 1015 Ω cm 324.2 kV mm-1, respectively. Besides, it also extremely tensile 193.6 MPa decomposition temperature 640 °C, showing a broad application prospect in high-end management fields such equipment.

Language: Английский

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Temperature-Arousing Self-Powered Fire Warning E-Textile Based on p–n Segment Coaxial Aerogel Fibers for Active Fire Protection in Firefighting Clothing

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: Oct. 13, 2023

Firefighting protective clothing is a crucial equipment for firefighters to minimize skin burn and ensure safety firefighting operation rescue mission. A recent increasing concern develop self-powered fire warning materials that can be incorporated into the achieve active protection before catches on fireground. However, it still challenge facilely design manufacture thermoelectric (TE) textile (TET)-based electronics with dynamic surface conformability breathability. Here, we an alternate coaxial wet-spinning strategy continuously produce alternating p/n-type TE aerogel fibers involving n-type Ti3C2Tx MXene p-type MXene/SWCNT-COOH as core materials, tough aramid nanofiber shell, which simultaneously flexibility high-efficiency power generation. With such fibers, TET-based sensors high mechanical stability wearability are successfully fabricated through stitching p-n segment fabric. The results indicate containing 50 pairs open-circuit voltage of 7.5 mV density 119.79 nW cm-2 at temperature difference 300 °C. output signal then calculated corresponding based linear relationship between temperature. alarm response time flame-retardant properties further displayed. Such true textiles offer breathability compatibility body movement, demonstrating their potential application in clothing.

Language: Английский

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High-performance, intrinsically fire-safe, single-component epoxy resins and carbon fiber reinforced epoxy composites based on two phosphorus-derived imidazoliums

Polymer Degradation and Stability, Journal Year: 2023, Volume and Issue: 208, P. 110261 - 110261

Published: Jan. 6, 2023

Language: Английский

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Color adjustable, mechanically robust, flame-retardant and weather-resistant TiO2/MMT/CNF hierarchical nanocomposite coatings toward intelligent fire cyclic warning and protection

Composites Part B Engineering, Journal Year: 2023, Volume and Issue: 271, P. 111159 - 111159

Published: Dec. 21, 2023

Language: Английский

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Recent advances in biomass phytic acid flame retardants

Polymer Testing, Journal Year: 2023, Volume and Issue: 124, P. 108100 - 108100

Published: June 2, 2023

With the rapid growth of industrialization, polymers have become widely used in people's daily lives. However, flammability these materials poses a potential threat to safety and property. To support sustainable development, it is important urgent develop high-performance, green flame retardants. One such material that has garnered significant attention flame-retardant field biomass phytic acid, which high phosphorus content excellent biocompatibility. In this review, we focus on use acid plastics, fabrics, other for fire resistance, including its intrinsic properties, phytate metal, ammonium multicomponent compounds. We also discuss proposed mechanisms behind properties explore future trends field.

Language: Английский

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High fire safety thermal protective composite aerogel with efficient thermal insulation and reversible fire warning performance for firefighting clothing

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 477, P. 147187 - 147187

Published: Nov. 10, 2023

Language: Английский

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Thermoelectric and Photoelectric Dual Modulated Sensors for Human Internet of Things Application in Accurate Fire Recognition and Warning

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(41)

Published: June 11, 2023

Abstract The emergence of the Internet Things (IoT) era has necessitated development intelligent wearable electronics for fire warning to mitigate hazards prior ignition. Although significant advancements are achieved in thermoelectric materials and devices, design a specific device precision still remains challenging. In this study, an sensing system human IoT that utilizes novel light/heat dual‐parameter‐responsive single‐walled carbon nanotube/poly(3‐hexylthiophene‐2,5‐diyl) (SWCNT/P3HT) composite is developed. This comprises composite, circuit microcontroller, message transmission system, which together create source device. synergistic effect light heat observed enhance output voltage response time under concurrent stimuli, as compared heating alone. found effectively identify alarm sources, owing high photoelectric performance SWCNT/P3HT precise recognition, ability adjust alarming threshold detecting hazards. study presents new approach designing hold potential applications smart home living environments, including child protection against

Language: Английский

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High-strength, thermal-insulating, fire-safe bio-based organic lightweight aerogel based on 3D network construction of natural tubular fibers

Composites Part B Engineering, Journal Year: 2023, Volume and Issue: 261, P. 110809 - 110809

Published: May 17, 2023

Language: Английский

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