Silicone nanofilament embedded, superhydrophobic polylactic acid composite aerogel

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160208 - 160208

Published: Feb. 1, 2025

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An Overview of Flame‐Retardant Materials for Triboelectric Nanogenerators and Future Applications

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 21, 2025

Abstract Triboelectric nanogenerators (TENGs) have gained significant attention for ability to convert mechanical energy into electrical energy. As the applications of TENG devices expand, their safety and reliability becomes priority, particularly where there is risk fire or spontaneous combustion. Flame‐retardant materials can be employed address these concerns without compromising performance efficiency TENGs. The primary focus this review on flame‐retardant materials, including polymers, biomaterials, liquid aerogels, carbon‐based materials. fundamental properties are elucidated. characteristics each material type described, along with potential boost importance flame retardancy in advancing technology projected from its usage wearable electronics, self‐powered sensors, smart textiles. Current challenges such as compatibility, fabrication complexity, environmental addressed, proposed strategies overcoming them. This underscores significance strengthening functionality devices, paving way widespread adoption across various industries.

Language: Английский

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Double‐Crosslinked Organic–Inorganic Hybrid Polyimide Aerogel Composites with Ultra‐Robust Toughness for Foldable Mechanical‐Thermal‐Coupled Protection

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 24, 2025

Abstract Aerogels excel in thermal insulation due to their porous structure, but limited mechanical strength restricts broader applications. Thus, the development of aerogel composites for equipment/personnel against and hazards extreme environments necessitates more design paradigm. Herein, a novel double‐crosslinked polyimide composite (PIAC) with an organic–inorganic hybridization approach is prepared. This composite, incorporating amino‐modified SiO 2 nanoparticles reduce shrinkage/density, offers exceptional from ‐110 °C 300 °C, flame resistance, low dielectric constant (1.4), conductivity 0.0357 W (m K) −1 self‐cleaning properties. Meanwhile, PIAC allows be manipulated into various shapes withstand repeated folding unfolding without damage. It boasts tensile 8.5 MPa (2.6‐fold enhancement) nominal elongation at break 54% (17.5‐fold enhancement), representing highest fracture toughness 32.99 × 10 6 kJ m −3 (47.8‐fold observed materials date. With maximum energy absorption reaching 7.46 MJ when dissipating high‐impact forces, its substantial enhancement capacity 60% over predecessor, not only bolster matrix also amplify strain rate strengthening effect. The fabricated poised foldable mechanical‐thermal‐coupled protection where such attributes are highly coveted.

Language: Английский

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Biomimetic functional Aerogels: From design Strategy, preparation to application advances

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160511 - 160511

Published: Feb. 1, 2025

Language: Английский

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3D printed colloidal Aerogels: Principle, Process, Performance, and perspective

Progress in Materials Science, Journal Year: 2025, Volume and Issue: unknown, P. 101456 - 101456

Published: Feb. 1, 2025

Language: Английский

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Gelation‐Constrained Freeze‐Casting Fabrication of Ultra‐Homogeneous Nanocomposite Aerogels with Superelasticity and Harsh Environment Tolerance

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 18, 2025

Abstract Freeze casting is a versatile technique for organizing low‐dimensional building blocks into ordered porous structural materials. However, the freeze‐casting fabrication of materials with robust and topologically elastic skeleton to withstand harsh conditions challenging. Herein, silanized ultra‐homogeneous nanocomposite aerogel fabricated using gelation‐constrained strategy. Diverging from traditional methods employing solution precursor, approach involves process utilizing rational‐designed supramolecular hydrogel as quasi‐solid precursor. The within hydrogel, enclosed in dense hydrogen‐bonded network, effectively mitigate secondary agglomeration caused by ice crystallization concentration enrichment during freeze‐casting. By forming cellular an interconnected nanoparticle resulting aerogels exhibit exceptional mechanical elasticity retaining over 98% height after 10 000 compression cycles, along superior electrical properties showing 78.9% increase conductivity compared conventional aerogels. Wearable piezoresistive sensors these demonstrate outstanding force sensing capabilities, broad linear range (0–17.6 kPa) high sensitivity (1.32 kPa −1 ). When integrated intermediate layer protective garments, offer insulation fire resistance, enabling them endure like repetitive extreme deformations, exposure high‐temperature flames, water‐erosion damages.

Language: Английский

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Multifunctional Flexible Sensor Based on Cracked Laser-Induced Graphene for Tactile Perception and Self-Healable Applications

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(17), P. 21170 - 21180

Published: Aug. 23, 2024

Flexible sensors are a significant component of flexible electronics for medical activity and human physiology monitoring. However, obtaining multifunctional sensor by simple process is still challenge. Herein, we propose transfer laser-induced graphene (LIG) onto polydimethylsiloxane. The uniform microcracks formed in the LIG layer during process, which enabled sensitive, stable sensing with multiplex functions including stretching, bending, twisting, pressing. properties were investigated. It proved that constructed delivered good performances. BoxLucas1 model, first time, proposed to simulate mechanism perfectly. porous microstructures high-performance sensor. various physical vibration signals motions monitored sensor, proving potential applications fields health movement A touch panel portable signal display system was constructed, sensor's application screen electronics. self-healable also demonstrated.

Language: Английский

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Enhanced thermal performance of 3D hybrid graphene aerogel encapsulating paraffin for battery thermal management

International Communications in Heat and Mass Transfer, Journal Year: 2024, Volume and Issue: 156, P. 107618 - 107618

Published: May 23, 2024

Language: Английский

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Penguin feather-inspired flexible aerogel composite films featuring ultra-low thermal conductivity and dielectric constant

Materials Horizons, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Given extremely high porosity, aerogels have demonstrated remarkable advantages in serving as thermal insulation and wave-transparent materials. Unfortunately, their practical applications are greatly confined by inherent fragility. The recent emergence of polymer presents an ideal platform for the development flexible aerogel films. However, additional cross-linking agents necessitated constructing a robust structure, complicating production process. Herein, we report film based on meta-aramid composites, inspired porous structure penguin feathers. intermolecular hydrogen bonds function natural agents. Their disruption results dissolution fibers, while reconstruction facilitates localized rearrangement chains during sol-gel process, generating closed nanopores. Furthermore, fluorinated hollow glass microspheres filled, compressing nanopores situated near interface to 75-150 nm. This meets critical threshold required Knudsen effect, decreasing conductivity levels below that ambient air. At optimized doping ratio 3 wt%, is 21.6 mW m-1 K-1, achieving low dielectric constant 1.43. Simultaneously, films exhibit enhanced mechanical properties, also show benefits hydrophobicity, colorability, ultralightness, flame retardancy, making themselves multifunctional materials suitable applications.

Language: Английский

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Low Shrinkage and Robust Polyimide/Ultrafine Glass Fiber Aerogel for Efficient Heat Resistance and Oil/Water Separation

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 9, 2025

Polyimide (PI) aerogels have attracted a great deal of attention due to their low density and excellent heat resistance. However, PI produce large, irregular shrinkage during the thermal imidization process, resulting in decreased porosity strength. In this work, silane coupling agent-modified ultrafine glass fibers (mUGF) were mixed with polyamide acid solution, followed by freeze-drying prepare PI/mUGF aerogels. As inorganic reinforced phase, mUGF high aspect ratio can significantly enhance skeleton aerogel, reducing its volume avoiding collapse porous structure imidization. The aerogel exhibits (0.059 g/cm3), (18%), good mechanical properties, stability insulation (thermal conductivity as 31.4 mW/m·K at room temperature, 55.9 300 °C). Additionally, also shows adsorption properties (pump oil temperature: 24 g/g; 200 °C: 17 g/g) structural stability, which be used adsorb oils organic solvents from polluted water. These findings promote design development low-shrinkage robust for oil/water separation insulation.

Language: Английский

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