Aramid nanofiber-based functional composite materials: Preparations, applications and perspectives

Zhang, Hui; Zhang, Meiyun; Li, Jinbao; Yang, Bin; Abbas, Syed Comail; Fu, Chenglong; Chen, Ting; Xia, Yuanyuan; Liu, Jiawei; Du, Xiaoyun; He, Zhibin; Ni, Yonghao

doi:10.1016/j.compositesb.2023.111151

Cited by 16 publications

(1 citation statement)

References 192 publications

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“…Aromatic polyamide fiber, also known as famous aramid fiber, has attracted tremendous attention because of its outstanding performance, such as excellent mechanical properties, high thermal stability, good flame retardancy, corrosion resistance, etc., which is currently the most widely used high-performance fiber in modern weapon and equipment, individual protection, and composite materials. − One of the most important applications of aramid fiber is protective clothing that could protect people in flame hazards or extreme environments. To ensure the safety of relevant personnel in complex temperature environments, higher performance of protective clothing is required with the advancement in cutting-edge industries including aerospace, metallurgy, firefighting, and other thermo-related fields. − From the performance point of view, besides the basic properties of the matrix, the structure of protective materials also poses a great impact on the protective efficiency.…”

Section: Introductionmentioning

confidence: 99%

Strong, Tough, and Recyclable Aramid Aerogel Fibers with Homogeneous Nanoscale Structures for High-Temperature Thermal Insulation Applications

Zhang,

Liu,

Huang

et al. 2024

ACS Appl. Nano Mater.

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Aramid aerogel fibers (AAFs) have attracted tremendous attention recently because of their lightweight, temperature resistance, and flame retarding characteristics, which hold great promise in wearable thermal insulation applications. However, there is still a lack of an efficient method for the fabrication of high-performance AAFs with homogeneous nanoscale structures and optimized thermal/mechanical properties. This paper reports a scalable approach for the continuous spinning of heterocyclic AAFs (HAAFs) by the combination of the "ropes bind rods" reinforcement concept and the "redox responsive sol−gel transition" strategy. The redox reaction responsiveness of the coordination property between cobalt ions and benzimidazole ligand contained in heterocyclic aramid (PABI) is exploited as triggering for sol−gel transition in the spinning process, where the highly dynamic PABI/Co 2+ complex in spinning dope rapidly converts into a highly stable PABI/Co 3+ complex upon extruding into an oxidation bath and forms gel fibers. Incorporating a small amount of flexible benzimidazole-containing polymer further promotes the gelation of PABI/Co 2+ system and strengthens the PABI/Co 3+ cross-linked networks on the basis of a "ropes bind rods" concept on the nanoscale level, which ensures the continuous spinning of HAAFs. The resultant HAAFs demonstrated a homogeneous nanoscale porous structure thanks to the in situ constructed cross-linked networks that prevent the gel skeleton from distortion in subsequent treatment. As a result, the HAAFs show mechanical strength among the highest reported values for AAFs and excellent toughness that is superior to all previous AAFs. The AAFs also exhibit good thermal stability and flame retardancy for thermal insulation applications. The recyclability of HAAFs is finally demonstrated based on the reversible feature of metal coordination bonds. This work is expected to provide an efficient strategy for the design and scalable fabrication of aramid and other high-performance aerogel fibers.

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Section: Introductionmentioning

confidence: 99%

Strong, Tough, and Recyclable Aramid Aerogel Fibers with Homogeneous Nanoscale Structures for High-Temperature Thermal Insulation Applications

Zhang,

Liu,

Huang

et al. 2024

ACS Appl. Nano Mater.

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Aramid Triboelectric Materials: Opportunities for Self‐Powered Wearable Personal Protective Electronics

Chi,

Cai,

Liu

et al. 2024

Adv Funct Materials

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The seamless integration of advanced triboelectric nanogenerators with fiber material has propelled the rapid advancement of intelligent wearable electronics. The overheating and mechanical abrasion associated with prolonged operation poses a significant challenge for conventional fiber‐based triboelectric materials. Aramid fibers, characterized by high thermal stability, ultra‐high mechanical strength, and excellent insulating properties, can effectively compensate for the limitations of triboelectric materials. However, the intrinsic advantages of aramid fiber triboelectric materials and their general structural design strategies have not yet to be comprehensively elucidated. In this review, the synthesis methods and development history of aramid fiber triboelectric materials in recent years are summarized. Importantly, the unique advantages and development potential of aramid fibers as triboelectric materials are systematically discussed, particularly regarding high‐temperature resistance, high strength, and electrical insulation. Furthermore, the latest advancements in the structural design and performance modulation of aramid fiber triboelectric materials are presented. The aramid fiber‐based self‐powered wearable electronics in high‐temperature warning, impact monitoring, and human energy harvesting are summarized. Finally, the challenges and opportunities facing the future development of aramid fiber‐based triboelectric nanogenerators are discussed.

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Highly Strong and Tough Transparent Aramid Nanofiber Aerogel Films for Passive Heating Energy‐Efficient Windows

Wu,

Hu,

Chen

et al. 2024

Adv Funct Materials

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Aerogel energy‐efficient glass can effectively reduce building energy consumption, but the low light transmission and weak mechanical properties greatly limit the application of aerogel in energy‐efficient windows. Herein, a modified aramid nanofiber aerogel with outstanding mechanical strength (1.80 MPa, pull over 30000 times its weight), transparency (94.38% in the infrared region), and resistance to extreme environments (thermal insulation, frost resistance, flame retardancy, and self‐extinguishing) is designed and synthesized using nanowire domain space structure strategy. The aerogel used for energy‐efficient windows to reduce energy consumption in buildings is demonstrated. When the aerogel energy‐efficient windows are applied in winter, the average temperature of the energy‐efficient windows during the period from 10:00 a.m. to 4:00 p.m. is 4.01 and 7.01 °C higher than the ordinary glass house and the outdoor temperature, respectively. Carbon reduction calculations show that even in the coldest provinces of China, poly(terephthaloyl chloride‐co‐phenylenediamine‐co‐2‐(4‐Aminophenyl)‐1H‐benzimidazol‐5‐amine) (PTPA) aerogel for passive heating can reduce CO2 emissions by 94.14 Kg m−2 per year. This study provides a new strategy for synthesizing transparent aramid aerogels and a new way to develop passive heating and warming energy‐efficient windows for the next generation of energy‐efficient and environmentally friendly buildings.

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Aramid nanofiber-based functional composite materials: Preparations, applications and perspectives

Cited by 16 publications

References 192 publications

Strong, Tough, and Recyclable Aramid Aerogel Fibers with Homogeneous Nanoscale Structures for High-Temperature Thermal Insulation Applications

Strong, Tough, and Recyclable Aramid Aerogel Fibers with Homogeneous Nanoscale Structures for High-Temperature Thermal Insulation Applications

Aramid Triboelectric Materials: Opportunities for Self‐Powered Wearable Personal Protective Electronics

Highly Strong and Tough Transparent Aramid Nanofiber Aerogel Films for Passive Heating Energy‐Efficient Windows

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