Nanofibrous Kevlar Aerogel Threads for Thermal Insulation in Harsh Environments

Liu, Zengwei; Lyu, Jing; Fang, Dan; Zhang, Xuetong

doi:10.1021/acsnano.9b01094

Cited by 303 publications

(295 citation statements)

References 41 publications

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“…In Figure 3B, Liu et al took advantage of the air‐like low thermal conductivity of aerogel for personal thermal insulation in harsh environment. [ 88 ] Aerogels, due to their low density, large surface area, and ultrahigh porosity, can suppress the thermal conduction, convection, and radiation simultaneously, showing great promise as ideal thermal insulation candidate materials. [ 89 ] Shaping the bulky aerogels into aerogel 1D fibers enables the design and manufacturing of woven textiles.…”

Section: Advanced Strategiesmentioning

confidence: 99%

Emerging Materials and Strategies for Personal Thermal Management

Liu

Shin

et al. 2020

Advanced Energy Materials

325

242

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us warm in cold climates and shielded us from the nakedness for modesty and civilization. [1,2] Cloth is also a platform for artists, designers, and tailors to advance the clothing demands with emerging materials, process, and fashion. [2] While the majority of the functionalities of clothes lie in their physical attributes, such as their softness, breathability, air/ vapor permeability, and, of course the appearance, their role in thermal management is equally, if not more, important. The primary goal of clothing is to satisfy human being's basic needs in thermal comfort, by providing cooling in the hot environment or heating in the cold environment. [1] The energy management aspect of clothing is becoming an increasingly important and attractive aspect due to our increasing awareness to energy consumption and our persisting pursuit of comfort and health. The finite availability and the associated environmental consequence of fossil fuels have motivated us to save energy from virtually all aspects of our daily lives. A suitable thermal envelop is a necessity for our living and working. To create a comfortable indoor environment, the building heating, ventilation, and air conditioning (HVAC) systems are widely used for space cooling and heating at the expense of excessive energy consumption. [3][4][5][6] According to United States In this decade, the demands of energy saving and diverse personal thermoregulation requirements along with the emergence of wearable electronics and smart textiles give rise to the resurgence of personal thermal management (PTM) technologies. PTM, including personal cooling, heating, insulation, and thermoregulation, are far more flexible and extensive than the traditional air/liquid cooling garments for the human body. Concomitantly, many new advanced materials and strategies have emerged in this decade, promoting the thermoregulation performance and the wearing comfort of PTM simultaneously. In this review, an overview is presented of the state-ofthe-art and the prospects in this burgeoning field. The emerging materials and strategies of PTM are introduced, and classed by their thermal functions. The concept of infrared-transparent visible-opaque fabric (ITVOF) is first highlighted, as it triggers the work on advanced PTM by combining it with radiative cooling, and the corresponding implementations and realizations are subsequently introduced, followed by wearable heaters, flexible thermoelectric devices, and sweat-management Janus textiles. Finally, critical considerations on the challenges and opportunities of PTM are presented and future directions are identified, including thermally conductive polymers and fibers, physiological/psychological statistical analysis, and smart PTM strategies.

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Section: Advanced Strategiesmentioning

confidence: 99%

Emerging Materials and Strategies for Personal Thermal Management

Liu

Shin

et al. 2020

Advanced Energy Materials

325

242

View full text Add to dashboard Cite

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“…Processing aerogels into 1D fibers can them fascinating properties such as the desired flexibility and high porosity. [ 79 ] However, common aerogel fibers often suffer from complicated fabrication processes and poor mechanical properties. As shown in Figure A, a wet spinning technology comprising a sol–gel transformation and freeze drying processes was employed to fabricate an ANF aerogel fiber directly from an ANF/DMSO dispersion.…”

Section: Macroscopic Morphologies Of Advanced Anf‐based Materialsmentioning

confidence: 99%

Fabrication, Applications, and Prospects of Aramid Nanofiber

Yang

Wang

Zhang

et al. 2020

Adv Funct Materials

244

175

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Aramid nanofibers (ANFs) are of great interest in various applications due to its 1D nanoscale, high aspect ratio, high specific surface area, excellent strength, and modulus as well as impressive chemical and thermal stabilities. It is considered as one of the most promising nano-sized building blocks with excellent properties and has therefore drawn increasing attention since 2011. However, no review has summarized the research progress and the prospective challenges of ANF. Herein, the methods of ANF fabrication and their relative merits are comprehensively discussed together with the challenges and progress in the deprotonation method for preparing ANF. The fabrication methods and development of ANF-based advanced materials with different macroscopic morphologies, including the 1D ANF aerogel fiber, 2D ANF film/nanopaper/coating, and 3D ANF gel and particle are also described. Furthermore, the applications of ANF in nanocomposite reinforcement, battery separators, electrical insulation nanopaper, flexible electronics, and adsorption and filtration media are presented. Additionally, the possible challenges and outlooks toward the future development of ANF are highlighted. This review indicates that the ANF and ANF-based materials mentioned herein will boost the development of next-generation advanced functional materials.

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“…They investigated the thermal insulation performance of the KNF aerogel textile under harsh environments (i.e., high temperatures of 300 and 350 °C). The results showed that the textile exhibited prominent thermal insulation performance, which benefitted from the low thermal conductivity of Kevlar aerogel …”

Section: Thermal Conduction Of Pcmsmentioning

confidence: 99%

“…The results showed that the textile exhibited prominent thermal insulation performance, which benefitted from the low thermal conductivity of Kevlar aerogel. [150] To summarize, lowering the thermal conductivity of PCMs is beneficial for improving their thermal insulation properties. However, the strategy research on reducing the thermal conductivity is still in its infancy and more potential approaches need to be developed.…”

Section: Thermal Conductivity Reduction Of Pcmsmentioning

confidence: 99%

Engineering the Thermal Conductivity of Functional Phase‐Change Materials for Heat Energy Conversion, Storage, and Utilization

Yuan

Shi

Aftab

et al. 2019

Adv Funct Materials

233

136

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Thermal energy storage technologies based on phase‐change materials (PCMs) have received tremendous attention in recent years. These materials are capable of reversibly storing large amounts of thermal energy during the isothermal phase transition and offer enormous potential in the development of state‐of‐the‐art renewable energy infrastructure. Thermal conductivity plays a vital role in regulating the thermal charging and discharging rate of PCMs and improving the heat‐utilization efficiency. The strategies for tuning the thermal conductivity of PCMs and their potential energy applications, such as thermal energy harvesting and storage, thermal management of batteries, thermal diodes, and other forms of energy utilization, are summarized systematically. Furthermore, a research perspective is given to highlight emerging research directions of engineering advanced functional PCMs for energy applications.

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Nanofibrous Kevlar Aerogel Threads for Thermal Insulation in Harsh Environments

Cited by 303 publications

References 41 publications

Emerging Materials and Strategies for Personal Thermal Management

Emerging Materials and Strategies for Personal Thermal Management

Fabrication, Applications, and Prospects of Aramid Nanofiber

Engineering the Thermal Conductivity of Functional Phase‐Change Materials for Heat Energy Conversion, Storage, and Utilization

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