Article
Engineering, Manufacturing
Yanlei Wang, Wanxin Zhu, Baolin Wan, Ziping Meng, Baoguo Han
Summary: This study found that adding carbon nanofibers can significantly improve the water absorption, tensile, and thermodynamic properties of flax fiber-reinforced epoxy laminates under hygrothermal aging conditions.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Polymer Science
Huayin Wen, Min Wang, Shikai Luo, Yuanlin Zhou, Tao Liu
Summary: Aramid fiber (AF)/ethylene-propylene-diene monomer (EPDM) microcellular foams with different AF content were prepared using the supercritical foaming method, and the effects of AF content on the properties of the foams were systematically studied. The addition of aramid fiber improved the thermal stability and mechanical properties of the EPDM foams, with higher viscosity and modulus observed in the AF/EPDM matrix compared to pure EPDM.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Hui-Jun Chen, Qi-Yao Bai, Mei-Chen Liu, Gang Wu, Yu-Zhong Wang
Summary: This study introduces a novel method for recycling aramid fibers into aramid nanofibers with a uniform structure, allowing for rapid large-scale production and investigation into the formation mechanism.
Article
Chemistry, Multidisciplinary
Cheng Chen, Guoliang Yang, Dan Liu, Xungai Wang, Nicholas A. Kotov, Weiwei Lei
Summary: The concept of harvesting osmotic energy from industrial wastewater using aramid nanofibers (ANFs) based membranes with high chemical/thermal stability, mechanical strength, toughness, and surface charge density is a promising approach to achieve high-performance energy harvesting. The use of ANF membranes significantly improves output power density, durability, and proton selectivity, leading to a 10x better performance compared to current state-of-the-art membranes. This innovative technology has the potential for scalable wastewater energy harvesting due to its high output power density retention for large membrane areas and fluoride-free synthesis from recyclable material.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Jianpeng Wu, Yu Wang, Junshuo Zhang, Chunyu Zhao, Ziyang Fan, Quan Shu, Xiaokang He, Shouhu Xuan, Xinglong Gong
Summary: In this study, a lightweight composite material with low thermal conductivity and high impact force dissipation is developed through infiltration and lamination. The versatile nature of this material makes it an ideal candidate for applications in transportation, military, and aerospace fields.
Article
Polymer Science
Bo Zhang, Xiaoming Shao, Tianze Liang, Wencai Wang, Ming Tian, Nanying Ning, Liqun Zhang
Summary: A simple and facile method of aramid nanofiber (ANF) coating was demonstrated to improve the interfacial adhesion between aramid fiber (AF) and rubber matrix. By introducing nanostructures on the fiber surface, the interfacial adhesion was enhanced significantly, with minimal impact on the mechanical properties of the fibers. This method showed advantages of simplicity, feasibility, and time effectiveness, making it significant for industrial applications.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Yukio Cho, Yu-Jin Choi, Samuel J. Kaser, Rebecca Meacham, Ty Christoff-Tempesta, Siyu Wu, Xiaobing Zuo, Julia H. Ortony
Summary: This study introduces diacetylene moiety into aramid amphiphiles, which allows for the self-assembly of various nanoribbon geometries with maintained structural and thermodynamic stability by incorporating rotational freedom into the molecular design.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Construction & Building Technology
Chiara Turco, Adilson de Paula Junior, Elisabete Teixeira, Ricardo Mateus
Summary: This article addresses the doubts raised by the authors of the discussion article and provides recommendations for future studies on stabilized CEBs.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Analytical
Shaohui Wang, Yuzhe Liu, Qian Wang, Peihui Liu, Lin Li, Tonghua Wang
Summary: The study presents a simple method to fabricate high-performance supercapacitor electrode materials derived from discarded aramid fibers through pyrolysis and KOH activation, resulting in excellent electrochemical performance and achieving high energy and power densities in supercapacitors.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Construction & Building Technology
Ghadie Tlaiji, Pascal Biwole, Salah Ouldboukhitine, Fabienne Pennec
Summary: This study aims to determine a mathematical equation for predicting the effective thermal conductivity of straw bales that can be applied to different types of straw in various circumstances. The equation is established based on the size, distribution, and morphology of straw fibers determined from microscopic images, using heat transfer models of porous and fibrous materials. The accuracy of the numerical model is validated through experimental measurements of thermal conductivity by altering the density, relative humidity, and temperature of the straw bales, showing good agreement between the numerical and experimental results.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jiongke Jin, Xun-En Wu, Huarun Liang, Haomin Wang, Shuo Li, Haojie Lu, Peng Bi, Jiali Niu, Yang Wu, Yingying Zhang
Summary: This study addresses the issue of inferior mechanical properties of macroscopic assemblies of nanomaterials by achieving strong interfacial interactions between aramid nanofibers and graphene oxide nanosheets and regulating the topological properties to form a super-strong and super-tough nanofiber film. The film possesses a nacre-like microstructure that deflects microcracks and demonstrates remarkable tensile strength and toughness, as well as excellent tolerance to extreme temperatures and fatigue resistance.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Physical
Shaohui Wang, Yuzhe Liu, Hua Wang, Xiaowen Wang, Lin Li, Tonghua Wang
Summary: In this study, template-free synthesis of porous carbon fibers with tunable mesopores was achieved using discarded aramid fibers. The resulting porous carbon fibers exhibited high specific surface area, abundant tunable mesopores, and N/O enriched surface. The optimized porous carbon fiber showed exceptional specific capacitance and rate performance in a KOH electrolyte, as well as remarkable energy density and cycling stability in a Na2SO4 electrolyte.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Iman Naseri, Morteza Ziaee, Zach N. Nilsson, Danielle R. Lustig, Mostafa Yourdkhani
Summary: In this study, nanostructured heaters based on laser-induced graphene (LIG) were developed by direct writing on nonuniform and porous aramid woven fabric. The synthesized graphene exhibited good electrical properties, and the produced heaters showed high electrothermal efficiency with steady-state temperatures up to 170 degrees C. The LIG-aramid fabric heaters also demonstrated easy impregnation with thermosetting resins, allowing the development of flexible and stiff composites. The results showed consistent electrothermal performance of the flexible composite heater under various conditions and excellent de-icing capability of the LIG-aramid fabric heater for ice melting.
Article
Polymer Science
Philipp Siedlaczek, Gerhard Sinn, Philipp Peter, Julius Jandl, Gyoergy Hantal, Karin Wriessnig, Roman Wan-Wendner, Helga C. Lichtenegger
Summary: This study investigated hygrothermal aging in two particle-filled epoxy-based composites. The composites had comparable filler loadings but differed in filler type (portland cement; quartz). The influence of 10 different climates with varying humidities and temperatures on mechanical properties was examined periodically using tensile tests. The changes in structure and composition were analyzed through microscopy, EDX, TGA, and XRD. It was found that physical aging and the growth of crystals within cement fillers contributed to stiffening effects, while water uptake led to an increase in modulus due to the formation of hydration products. The degradation of Young's modulus was not affected by filler type, but the degradation of tensile strength was substantially influenced.
POLYMER DEGRADATION AND STABILITY
(2023)
Article
Chemistry, Multidisciplinary
Fengxiang Chen, Lisha Zhai, Huiyu Yang, Shichao Zhao, Zonglei Wang, Chong Gao, Jingyi Zhou, Xin Liu, Zhenwei Yu, Yong Qin, Weilin Xu
Summary: The study successfully enhanced the UV resistance and laundering durability of aramid fibers through a dual-layer ultrathin Al2O3-TiO2 coating. During testing with high temperature and intense UV light exposure, the fibers only experienced a decrease in tenacity of approximately 0.85%.