Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 40
·21379-21389
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IF 14.511
Xi Lu,Yusheng Ye,Wenhui Shang,Simin Huang,Haifei Wang,Tiansheng Gan,Guokang Chen,Libo Deng,Qixing Wu,Xuechang Zhou
Conductive textiles are promising components for next-generation wearable electronics. However, it is still a challenge for current conductive textiles and wearable electronic devices to survive in harsh environments, such as extreme mechanical damages and low/high-temperature stresses. Herein, we report ultrastrong, flame-retardant, intrinsically weldable, and highly conductive metallized Kevlar fabrics (MKFs) fabricated via polymer-assisted electroless deposition (ELD) and electrodeposition (ED) techniques. The combination of ELD and ED techniques effectively metallizes the Kevlar fabrics, enabling ultrahigh conductivity (sheet resistance <0.007 Ω sq−1). More importantly, the deposited metal layers significantly enhance the anti-impact properties of Kevlar fabrics by 2–3 times. Due to the inherent properties of Kevlar and effective metal coatings, the MKFs maintain conductivity while suffering various mechanical damages (GPa-scale tensile strength, cutting, sticking, etc.), high temperatures (∼300 °C), and even flame stresses. Surprisingly, the MKFs show intrinsic weldability with traditional solder materials. The multifunctional applications of such high-performance metallized fabrics are demonstrated as textile-based conductors, heaters, and supercapacitors, all of which could survive in extremely harsh conditions.
研究领域:
材料科学
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纺织工程
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
ACS ES&T Water
·
2022
·
IF 0
Zhao Yang,Shushan Yuan,Yimeng Shi,Yuting Zhang,Shijie Bian,Sha Liang,Keke Xiao,Wenbo Yu,Huijie Hou,Jingping Hu,Bingchuan Liu,Jiakuan Yang
Membrane fouling and acidic environment instability are inevitable problems restricting the widespread application of membranes in wastewater treatment. Herein, we report a polyelectrolyte hydrogel membrane with high acid resistance and antifouling properties synthesized by phase inversion of Kevlar nanofibers solution. The hydrogel membrane, compared to the commercial PVDF membrane, has a higher rejection of Congo Red, Direct Red 23, and Direct Red 80 solutions, and excellent antifouling performance when filtering bovine serum protein or humic acid solution. The high antifouling performance is attributed to a large number of hydrophilic groups in the structure of the hydrogel, which can induce the formation of a protective layer of hydration, thus reducing the pollutants adsorbed on the surface. Besides, the acid resistance ability of the Kevlar membrane was verified by a phosphoric acid (pH = 0) immersion experiment. Due to the superior performance of this membrane and the one-step preparation process, the developed Kevlar membrane has great potential applications for wastewater treatment.
研究领域:
环境科学
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材料科学
·
化学工程
✓ 已验证
产品关联
DOI
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Yanqing Xu,Guibing Peng,Wenfei Li,Yuying Zhu,Zhaohuan Mai,Natalie Mamrol,Junbin Liao,Jiangnan Shen,Yan Zhao
Kevlar aramid nanofibers (KANF) are formed by the nanoscale structure of poly (paraphenylene terephthalamide) chains and are the emerging candidate for organic solvent permeation. However, the KANF membranes have a highly ordered and compact structure with few nanofluidic channels, resulting in low-efficiency solvent transport and undesirable membrane filtration. Here, the aligned composite membranes were fabricated by assembling the amino-polystyrene nanospheres (APN) into the KANF matrix and finally obtained a series of the APN@KANF membranes. These APN disrupted the KANF chain packing and increased the fractional free volume (from 27.7 to 35.6%). The ethanol permeance of the APN@KANF membrane was six times higher than the KANF membrane and maintained its rejection performance. Experiments and molecular simulations indicated that these APN increased the pore interconnectivity, which enhanced solvent permeability and molecular sieving. In addition, these highly stable and rigid resulting APN@KANF composite membranes could be used in extreme polar aprotic and nonpolar environmental conditions. This work highlights a promising application of the APN@KANF membranes in organic solvent nanofiltration .
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Deke Li,Zhiguang Guo
Superhydrophobic layers are extremely essential for protecting material surface in various applications. In this study, a stable superhydrophobic mixed matrix surface with a 152.2° contact angle can be fabricated through the technology of layer-by-layer hot-pressing (HoP), and then modified by 1H,1H,2H,2H-perfluorooctyltriethoxysilane (PFOTES) on the ZIF-8@Kevlar fabric surface. The morphology and chemical composition were analyzed by the means of SEM, XRD and FTIR. The obtained superhydrophobic coatings showed excellent antiwear performance and drag reduction under desired working conditions. Moreover, we successfully applied superhydrophobic F-ZIF-8@Kevlar fabric in the alcohol adsorbent with high removal capacity, and it can be reused for several times without serious efficiency loss.
研究领域:
材料科学
·
表面工程
✓ 已验证
DOI
高影响因子
ACS Nano
·
2019
·
IF 13.903
Zengwei Liu,Jing Lyu,Dan Fang,Xuetong Zhang
Aerogel with low density, high porosity, and large surface area is a promising structure for the next generation of high-performance thermal insulation fibers and textiles. However, aerogel fibers suffer from weak mechanical properties or complex fabricating processes. Herein, a facile wet-spinning approach for fabricating nanofibrous Kevlar (KNF) aerogel threads (i.e., aerogel fibers) with high thermal insulation under extreme environments is demonstrated. The aerogel fibers made from nanofibrous Kevlar render a high specific surface area (240 m2/g) and wide-temperature thermal stability. The flexible and strong KNF aerogel fibers are woven into textiles to illustrate the excellent thermal insulation property under extreme temperature (−196 or +300 °C) and at room temperature. COMSOL simulation is applied to calculate the thermal conductivity of a single aerogel fiber and find an effective way to improve the thermal insulation property of the aerogel fiber. Furthermore, a series of functionalized fibers or textiles based on KNF aerogel fibers, such as phase-change fibers, conductive fibers, and hydrophobic textiles, have been prepared. Such KNF aerogel fibers represent a promising direction for the next generation of high-performance fibrous thermal-insulation materials.
研究领域:
材料科学
·
纺织工程
·
热力学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Yongfang Chen,Liping Gan,Hanlin Zhang,Dongya Yang,Fengxian Qiu,Tao Zhang
Heat preservation, breathability, and unidirectional liquid penetration properties of wearable materials are vital for personal thermal management applications. Herein, flexible wearable Kevlar aerogel membranes with breathable and unidirectional liquid penetration properties were fabricated by underwater protection spraying of PDMS-trichlorotoluene onto one side of a Kevlar aerogel membrane and magnetron sputtering of Al nanoparticles on the other side of a Kevlar aerogel membrane PDMS (Al-KAM-PDMS). The results indicated that the PDMS side played an important role in improving the unidirectional liquid penetration property due to the asymmetric wettability property and an aerogel structure. To simulate unidirectional liquid penetration, simulated sweat can be penetrated from the PDMS side to the Al side of Al-KAM-PDMS within 14.4 s, implying excellent permeability. The Al side with high infrared reflectivity (72.77%) demonstrates that infrared radiation can be reflected back to the human body to achieve passive heating. An infrared image shows that Al-KAM-PDMS enables a simulated skin temperature decrease of 5 °C under a low temperature environment as compared to the Kevlar aerogel. The introduction of PDMS into Al-KAM-PDMS endows the membrane with high tensile stress of 5.60 MPa. In addition, Al-KAM-PDMS also possesses excellent breathability, showing its potential in wearable materials. Because of the exceptional unidirectional liquid penetration, breathability, and radiant heat insulation ability, Al-KAM-PDMS is a promising wearable material to help maintain a comfortable microclimate for individuals in outdoor environments.
研究领域:
材料科学
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热能工程
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纺织科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Hu Long,Yaming Hu,Jiaxin Liu,Wei Wang,Guanglan Liao,Anthony Chun Yin Yuen,Guan-Heng Yeoh,Yuan Hu,Tielin Shi
With rapid advancements in aerospace and supersonic aircraft technology, there is a growing demand for multifunctional thermal protective materials. Aerogels, known for their low density and high porosity, have garnered significant attention in this regard. However, developing a lightweight multifunctional aerogel that combines exceptional thermal and mechanical properties through a straightforward and time-efficient method remains a significant challenge. Herein, a facile and universal approach is developed for the preparation of Kevlar/hexagonal boron nitride (h-BN) aerogels, in which a spin-assisted method is applied to create robust microribbons and further accelerate solvent displacement. The resulting microribbon scaffold, with its entangled nanofiber–nanosheet morphologies, exhibits sufficient strength to prevent volume shrinkage during drying, thereby allowing precise control over aerogel density. The porous hybrid aerogels, featuring controllable geometric characteristics and tailored densities ranging from 6.9 to 100 mg cm–3, can be successfully fabricated. These aerogels exhibit excellent thermal insulation properties, and the thermal conductivities of the as-prepared KBX aerogels have a wide distribution in the range of 0.0269–0.0450 W m–1 k–1. The thermal stability of the hybrid aerogels is enhanced to 566 °C. Moreover, the resulting hybrid aerogels exhibit an ultrahigh bearing ratio, supporting more than 2000 times their own weight while maintaining stable structural integrity. These aerogels also demonstrate high compressive strength, hydrophobicity, and excellent sorption performance for various oils and solvents. Additionally, the oil-saturated aerogels can be easily recovered through heat treatment or combustion in air. The features endow hybrid Kevlar/h-BN aerogels with significant potential for applications in thermal management, environmental protection, and neutron protection.
研究领域:
材料科学
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航空航天工程
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Bo Mu,Yun'an Li,Kang Du,Xiaoqin Dai,Li Tian,Junhong Guo,Baoping Yang,Jinfeng Cui,Xuemei Bao
Dimensionally stable and high strength Polyimide(PI)/nKevlar composite aerogels are fabricated by the inclusion of nano Kevlar fibers with PI precursor polyamide acid via solution mixing and subsequent vacuum drying. The rigid macromolecular structure of nKevlars and the intermolecular hydrogen bonding result in lower shrinkage/density and larger porosity. The PI/nKevlar composite aerogels demonstrate a 23.4% reduction in the linear shrinkage. Compared with pure polyimide aerogel, the friction coefficient and wear rate of composite aerogel decreased significantly, with the dry friction wear rate of the PI/nKevlar-1.0 reduced by 34.14% and the friction coefficient of the oil-containing aerogel reduced by 28.29% ascribing to the increased loading bearing of the composite.
研究领域:
材料科学
·
摩擦学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Yi Wang,Xiaofeng Yuan,Jianjun Wang,Jianrong Wang,Ting Zhang,Yi Zheng,Yangtao Xu
The introduction of porous matrix in shape stable phase change materials (PCMs) alters the phase transition behavior of confined molecules. The mechanism by which the matrix affects the thermophysical properties of composite PCMs is still unclear, even there are conflicting understandings of the same phenomenon. According to this, paraffin/Kevlar nanofibrous films (PF/KNF) with different PF contents were fabricated by one step self-assembly method to comprehensively evaluate the regulation of confinement effects on the thermophysical properties and crystallization kinetics of confined PCMs. Due to the strong self-assembly tendency of Kevlar nanofibers in proton environment, paraffin passively wrapped in the network of matrix, forming a sandwich layered structure. The confinement of matrix altered the crystal structure of paraffin, even leading to the amorphous states in films with lower paraffin content. It also leaded to the formation of a non-melting layer at host-guest interface, thereby reducing the latent heat of composite PCMs. The latent heat of PF/KNF-70, the film with the highest paraffin content without leakage, decreased by about 32.7 % compared to the theoretical enthalpy calculated based on the mass percentage of paraffin in composite. In addition, the percentage of non-phase transition layer decreased linearly with the increase of PF content. The results of crystalline dynamics indicate that the matrix plays a dual role in providing nucleation sites and inhibiting molecular motion. When crystallization occurs at higher temperature (48.8 °C in this study), providing nucleation sites and promoting crystallization dominated the process, while inhibiting molecular motion and reducing crystallization rate become more prominent when crystallization temperature decreases.
研究领域:
材料科学
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热能工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2023
·
IF 8.7
Bing Liu,Quan Liu,Yucheng Pan,Jianyu Zhou,Junshuo Zhang,Shuai Liu,Ziyang Fan,Huaxia Deng,Yuan Hu,Xinglong Gong
An intelligent material with shear thickening, flame-retardant and sensing properties was prepared by introducing mesoporous silica and carbon nanotubes to ionic liquids. By impregnating the conductive shear thickening fluid (STF) on Kevlar fabric and drying in an oven, CNTs/STF/Kevlar composite was obtained. Due to the rate-sensitive performance of STF, the yarn pull-out force of CNTs/STF/Kevlar increased 3–4 times compared with that of neat Kevlar, once the impregnation weight gain is 55 wt%. Furthermore, the CNTs/STF/Kevlar composite can maintain intact at 110 m/s incident velocity of bullet, whereas neat Kevlar fabric was penetrated at the same velocity, and exhibited the flame resistance as well due to the thermal insulation property of mesoporous silica and flame-retardant performance of ionic liquids. Then, CNTs/STF/Kevlar composite also performed obvious sensing characteristic due to the introducing of carbon nanotubes, and showed the application potential in the field of safe wearable equipment.
研究领域:
材料科学
·
安全工程
·
纺织科学
✓ 已验证
DOI
高影响因子
ACS Nano
·
2021
·
IF 15.881
Yaqian Bao,Jing Lyu,Zengwei Liu,Yi Ding,Xuetong Zhang
Smart and functional fibers have demonstrated great potentials in a wide range of applications including wearable devices and other high-tech fields, but design and fabrication of smart fibers with manageable structures as well as versatile functions are still a great challenge. Herein, an ingenious bending-stiffness-directed strategy is developed to fabricate smart phase-change fibers with different bending stiffnesses for diverse applications. Specifically, the hydrophobic Kevlar aerogel-confined paraffin wax fibers (PW@H-KAF) are fabricated by employing hydrophobic Kevlar aerogel fibers (H-KAFs) as the porous host and paraffin as the functional guest, where the H-KAF is obtained by applying a two-step process to functionalize Kevlar nanofibers (KNFs) with a special coagulation bath containing a mixture of ethanol and n-bromobutane. The prepared PW@H-KAFs exhibit high latent heat (135.1–172 J/g), outstanding thermal cyclic stability and satisfactory mechanical properties (30 MPa in tensile strength and 30% in tensile strain). In addition, the PW@H-KAFs with bending stiffness was lower than the critical one (1.22 × 10–9 N·m2) even in a solid state of paraffin wax exhibits high flexibility, washable performance, and high thermal management capability, showing great potential for smart temperature-regulating fabrics. PW@H-KAFs with a bending stiffness higher than the critical one at a solid state of paraffin wax can be utilized as shape memory materials, attributed to the transition between rigidity and flexibility caused by the phase transition. As a proof of concept, a dynamic gripper is designed based on the PW@H-KAF (400 μm in diameter) for transporting items by gripping in the rigid state and releasing in the flexible state. This work realizes versatile applications with the PW@H-KAFs through the bending stiffness-directed method, providing ideas for the application of phase-change composites.
研究领域:
材料科学
·
智能纤维技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Pengxin Shen,Junbin Liao,Quan Chen,Huimin Ruan,Jiangnan Shen
The development of organic solvent resistant ion exchange membranes (IEMs) with high ion conductivity is of significance for broader electrodialysis (ED) applications. In this work, a series of organic solvent resistant cation exchange membranes (CEMs) has been fabricated by splitting Kevlar fabrics into small and short nanofibers , followed by modifying with 4-amino-benzenesulfonic acid monosodium salt (ABS) and poly(4-styrenesulfonic acid- co -maleic acid) sodium salt (PSSMA) eater via amide condensation. By tuning the content of ABS, the as-prepared poly- p -phenylene terephthalamide sulfonated polymer (PAP) CEMs (PAP-CEMs) show high ion exchange capacities (up to 2.23 mmol⋅g −1 ), good electrochemical performance and desired capacity of cation/anion separation in ED. To evaluate the organic solvent resistance of as-prepared CEMs, PAP-CEMs were immersed in ethanol and acetone aqueous solutions for 48 h at room temperature, respectively. The investigation demonstrates that ED with the treated CEM (the optimized PAP-0.50 CEM) still exhibits high desalination efficiencies (81.2%, in 60% (V ethanol /V water ) ethanol solution; 82.3%, in 60% (V acetone /V water ) acetone solution) and concentration efficiencies (57.4%, in 60% ethanol solution; 50.9%, in 60% acetone solution). As a result, it is believed that the study here highlights a design of simple route for the preparation of CEMs, which can be potentially applied in ED for organic solvent solution systems.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）