Strong, Tough, Shell-Cross-Linked Aramid Nanofibrous Aerogel Fibers for Thermally-Protective Textiles DOI

Chuxin Yue,

Yinghe Hu,

Youbo Di

et al.

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(9), P. 10886 - 10894

Published: May 1, 2024

Aerogel textiles show remarkable promise for thermal protection under extreme conditions. However, challenges in the mass production of aerogel fibers and their low strength still impede practical applications. Here, we report shell-cross-linked aramid nanofibrous (ScANFAFs) fabricated via a stepwise sol–gel coupled wet-spinning strategy. This strategy enables rapid gelation shell flow nanofiber (ANF) sol through fast reprotonation cross-linking reactions H-lacking ANFs to form strong tough layer, while core undergoes slow obtain porous layer. Given this composite structure, ScANFAFs achieve 83.2 MPa, toughness 15.05 MJ·m–3, high porosity (>96%), specific surface area (286.8 m2·g–1). The mechanical robustness meets requirements weaving by using an automated loom. resulting exhibit conductivity (0.032 W·m–1·K–1), excellent over wide temperature range, outstanding stealth capabilities cold ambient work points promising direction multifunctional textiles.

Language: Английский

Wearable Aerogels for Personal Thermal Management and Smart Devices DOI

Bing Wu,

Qingjie Qi, Ling Liu

et al.

ACS Nano, Journal Year: 2024, Volume and Issue: 18(14), P. 9798 - 9822

Published: March 29, 2024

Extreme climates have become frequent nowadays, causing increased heat stress in human daily life. Personal thermal management (PTM), a technology that controls the body's microenvironment, has promising strategy to address stress. While effective ordinary environments, traditional high-performance fibers, such as ultrafine, porous, highly thermally conductive, and phase change materials, fall short when dealing with harsh conditions or large temperature fluctuations. Aerogels, third-generation superinsulation material, garnered extensive attention among researchers for their applications building energy conservation, transportation, aerospace, attributed extremely low densities conductivity. aerogels historically faced challenges related weak mechanical strength limited secondary processing capacity, recent advancements witnessed notable progress development of wearable PTM. This underscores potential within serving self-powered smart devices sensors. Review offers timely overview PTM particular focus on wearability suitability. Finally, discussion classifies five types based aerogel function: insulation, heating, cooling, adaptive regulation (involving cooling), utilization devices.

Language: Английский

Citations

40
Fire‐Safe Aerogels and Foams for Thermal Insulation: From Materials to Properties DOI Open Access

Jiabing Feng,

Zhewen Ma,

Jianpeng Wu

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 19, 2024

The ambition of human beings to create a comfortable environment for work and life in sustainable way has triggered great need advanced thermal insulation materials past decades. Aerogels foams present prospects as insulators owing their low density, good insulation, mechanical robustness, even high fire resistance. These merits make them suitable many real-world applications, such energy-saving building materials, thermally protective aircrafts battery, warming fabrics. Despite advances, date there remains lack comprehensive yet critical review on the materials. Herein, recent progresses fire-safe thermal-insulating aerogels are summarized, pros/cons three major categories aerogels/foams (inorganic, organic hybrids) discussed. Finally, key challenges associated with existing discussed some future opportunities proposed. This is expected expedite development insulating help sustainable, safe, energy-efficient society.

Language: Английский

Citations

18
Mechanically Robust and Thermal Insulating Silica/Aramid Nanofiber Composite Aerogel Fibers with Dual Networks for Fire‐Resistant and Flexible Triboelectric Nanogenerators DOI Open Access
Jia Li,

Xiangning Hu,

Pan Yao

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 22, 2024

Abstract Aerogel fibers, known for their lightweight and exceptional thermal insulation properties, provide an ideal material solution fabricating triboelectric nanogenerators (TENGs) self‐powered wearable electronics in extreme environments, such as firefighting gear. However, current aerogel fibers face limitations due to poor mechanical properties lack of performance stability under harsh conditions. Herein, a facile strategy preparing silica/aramid nanofiber (ANF) composite with interpenetrated dual networks silica‐dominant component (≈64 wt.%) is demonstrated; the unique structure composition endow high tensile strength (3.4 MPa), low conductivity (0.033 W (m·K) −1 ), large specific surface area (587 m 2 g outstanding fire resistance at 95% porosity, combining best both ANF silica aerogel. Moreover, exhibit excellent flexibility extremely temperatures (−196 °C) maintain structural integrity even when exposed flame up 5 min. Leveraging these fiber‐based TENGs show electrical output before after combustion (>94% retention). The fabrication offers promising opportunities modulating functionalities on demand, holding great potential future applications smart protective fabrics environments.

Language: Английский

Citations

16
Core-shell structured BN/SiO2 nanofiber membrane featuring with dual-effect thermal management and flame retardancy for extreme space thermal protection DOI
Duo Pan,

Ziyuan Han,

Junting Lei

et al.

Science Bulletin, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

Citations

4
Poly(p-Phenylene Benzobisoxazole) Nanofiber: A Promising Nanoscale Building Block Toward Extremely Harsh Conditions DOI
Baolong Yuan, Bin Yang, Ping Xu

et al.

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 6, 2025

Since the invention and commercialization of poly(

Language: Английский

Citations

2
Chemical‐Physical Synergistic Assembly of MXene/CNT Nanocoatings in Silicone Foams for Reliable Piezoresistive Sensing in Harsh Environments DOI

Zuan‐Yu Chen,

Shuai‐Chi Liu,

Yu‐Xi Wu

et al.

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 30, 2024

Abstract Owing to their high sensitivity across a wide stress range, mechanical reliability, and rapid response time, flexible polymer foam piezoresistive sensors have been extensively used in various fields. The reliable application of these under harsh environments, however, is severely limited by structural devastation poor interfacial bonding between polymers conductive nanoparticles. To address the above issues, robust MXene/CNT nanocoatings on surface, where chemical assembly MXene nanosheets physical anchoring CNTs lead strong bonding, are designed described, which endows foams with reliability unexpected multi‐functionalities without compromising instinct properties. optimized nanocomposites thus maintain outstanding wide‐temperature flexibility (−60–210 °C) elasticity (≈3% residual strain after 1000 cycles). Moreover, display good at relatively range 0–70% remarkable stability acidic alkaline settings. Furthermore, exceptional fire resistance (UL‐94 V‐0 rating) can provide stable sensing behavior (over 300 cycles) even being exposed flames for 5 s, making them one most materials so far. Clearly, this work widens applications based silicone environments.

Language: Английский

Citations

14
Wet Spinning Technology for Aerogel Fiber: Pioneering the Frontier of High-Performance and Multifunctional Materials DOI
Xue Guo, Yuxin Zhang, Jie Li

et al.

Advanced Fiber Materials, Journal Year: 2024, Volume and Issue: unknown

Published: July 10, 2024

Language: Английский

Citations

13
Loofah‐Inspired Ultralight and Superelastic Micro/Nanofibrous Aerogels for Highly Efficient Thermal Insulation DOI
Wei Zhang, Guoqiang Liang,

Sai Wang

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: July 25, 2024

Abstract Extreme cold events are becoming more frequent and intense around the world, imposing a huge burden on human health global economy. However, developing fibrous materials featuring ultralight weight, high shape retention, thermal insulation to withstand extreme conditions remains great challenge. Herein, inspired by natural porous loofah, an superelastic micro/nanofibrous aerogel (MNFA) that integrates hierarchical pores stable physical entanglements is directly synthesized via gelation electrospinning technology. By manipulating solution/water molecules interaction of charged jets, structure consisting networks microfibers developed, which endows MNFA with porosity (99.7%). Benefiting from entanglement between rigid flexible nanofibers, resulting can large tensile stress (4000 times its weight) 1000 compression cycles without being damaged. Moreover, exhibits feature (3 mg cm −3 ) performance (low conductivity 25.3 mW m −1 K ), making promising contender for highly efficient insulation. This work offer fresh perspectives design advancement advanced aerogels variety uses.

Language: Английский

Citations

13
Multifunctional Carbon Fiber@TiO2/C Aerogels Derived from MXene for Pressure Tunable Microwave Absorption DOI
Fushuo Wu, Feiyue Hu,

Peiying Hu

et al.

Carbon, Journal Year: 2024, Volume and Issue: unknown, P. 119644 - 119644

Published: Sept. 1, 2024

Language: Английский

Citations

12
Pottery‐Inspired Flexible Fire‐Shielding Ceramifiable Silicone Foams for Exceptional Long‐Term Thermal Protection DOI Open Access

Zuan‐Yu Chen,

Yu‐Yue Wu,

Shuai‐Chi Liu

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 31, 2024

Abstract Owing to their preeminent properties, including mechanical flexibility, thermal insulation, and low cost, silicone foams are widely used in industrial fields. However, flame‐induced structural failure greatly restricts practical applications. It is challenging for flexible realize reliable protection thermo–mechanical–oxidative environments. Inspired by traditional pottery, a multiscale‐filler synergistic ceramifiable strategy creating foam nanocomposites with flexibility long‐term fireproofing proposed herein. The materials not only maintain elasticity (≈2% residual strain after 1000 cycles) at temperature range of −60–210 °C but also exhibit exceptional (>30 min) insulation upon exposure ≈1300 oxidative environments because ability form gradient robust porous ceramic structure. Moreover, the material can provide stable electric cables lithium‐ion battery packs, making it one most so far. This work broadens applications emerging fields where buffering required.

Language: Английский

Citations

12