Engineering Research Express
·
2024
·Vol. 6
·期 2
·025006
·
IF 1.5
GyeChol Sin,KukChol Ri,SangMo Jon,GangHyok Kim
Composite transparent conductive electrodes (TCEs) consisting of silver nanowires (AgNWs) and conductive metal oxides are very promising for flexible optoelectronic devices due to their smooth surface morphology and high chemical stability. However, it is still challenging to ensure high optoelectronic performance and long-term stability in practical applications. Here, we solved these problems by coating antimony-doped tin oxide (ATO) nanoparticles dispersion on ultra-long AgNWs network using waterborne polyurethane (WPU) binder. Ultra-long nanowires occupy less wire-wire junctions and space than short nanowires, thus increasing the optoelectronic performance and flexibility of the composite TCE. WPU improves the adhesion and stability of ATO nanoparticles to the substrate and AgNWs network. The fabricated composite TCE showed a low sheet resistance of 11.9 Ω sq−1, good optical transmittance of 83% at 550 nm and a figure of merit (FOM) of 162 compared to PET/ITO electrode. It also showed excellent mechanical flexibility, adhesion to the substrate and solvent stability. Furthermore, the long-term conductivity was maintained under ambient conditions for 60 days.
研究领域:
材料科学
·
纳米技术
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2025
·
IF 4.3
Liping Liu,Ju Wang,Guanjun Yang,Shuyuan Wang,Jinyi Wang,Zhibo Ren,Weiqi Guo,Peng Liu
Alkaline water electrolysis is considered an optimal technology for large-scale production of green hydrogen because of its economic and mature characteristics. The separator plays a crucial role in the alkaline water electrolysis process, as it fulfills the functions of gas separation and electrolyte transport. Nevertheless, the development of advanced separators with low ohmic resistance, high gas barrier ability, and good durability simultaneously remains a major challenge. Here, we first fabricated a series of high-performance composite separators with a porous bicontinuous structure by employing a nonsolvent-induced phase separation technique using a “weak solvent” (a solvent with a low affinity toward the membrane-forming polymer). The unique porous bicontinuous structure endows the membranes with high porosity, narrow pore size distribution with nanopores, and good hydrophilicity. As a result, the composite separator exhibits not only a low area resistance (0.13 Ω·cm2) but also a high bubble point pressure (5.1 bar). The composite separator also displays excellent durability in both long-term electrolysis and alkaline-aging tests.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Xingang Wang,Jian Fu,Fubing Zou,Hongyun Luo,Jiukai Cai,Yong Yu
According to the chemical composition and structure properties of lepidolite lithium slag (i.e., LS), reinforcing materials were prepared to improve the mechanical properties and flame retardancy of poly(vinyl alcohol) (PVA)/montmorillonite (MMT) aerogels. Specifically, calcium sulfate anhydrous whiskers (CSAW) were synthesized from LS rich in CaO and SO3 (i.e., LS-B), and nanofillers were obtained from LS rich in Al2O3 and SiO2 (i.e., LS-A). A densified columnar-honeycomb structure of composite aerogels was obtained by adding the above CSAW and nano LS-A. The results show that the mechanical properties were improved remarkably, and the peaks of heat release rate, smoke production rate, and total smoke production were decreased significantly with the combined addition of CSAW and nano LS-A. The strength was increased by about 160%, and the modules were increased by about 130%. The fire safety was also promoted significantly, i.e., the peak of heat release rate was 128.37 kW·m–2, and the smoke production rate was cut down about 3.0 times. The enhancing mechanism of the combined effect from CSAW and nano LS-A on mechanical properties and flame retardancy should be due to the columnar-honeycomb structure formed by CSAW and PVA/MMT and the filling effect of nano LS-A. The proportion of LS utilized in the composite aerogels was achieved by more than 40%. The composite aerogel can be potentially applied in flame retardant fields. This study is of great significance for the high value and comprehensive utilization of LS. It also provides an idea for improving the mechanical properties and flame retardancy of PVA/MMT aerogels in the future.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Lin Yu,Jia-Yue Dai,Zhen-Liang Xu,Yin-Xin Fang,Rui Jia,Yong-Jian Tang
Covalent Organic Frameworks (COFs) composite nanofiltration (NF) membrane has high permeation flux and rejection. However, the reaction rate of COFs is relatively slow. Adding acid catalyst is a common method to shorten reaction time. However, the dissatisfactory synthesis rate will lead to irregular structure of COFs materials. In this work, it is the first time to use organobase as a catalyst to prepare COFs composite membrane. The COFs structure will be optimized and the membrane performance can be enhanced. The prepared TpPa-PIP membrane compared with acid catalyzed TpPa-HAc membrane has better permeability, permeance of 89 L m −2 ·h −1 ·bar −1 and CR rejection of 99.54 %. This improvement is because of the TpPa-PIP intermediate made slower reaction speed that improves the overall regularity and crystallinity of COFs. Therefore, it is better method for broadening the application of organobase-catalyzed in preparing membranes.
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
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Shihang Guo,Lin Wang,Chenyang Xue,Sumei Lin,Tingxuan Yi,Yuwen Zhu,Donglin Han
Protonic ceramic cells (PCCs) can convert the energy between electricity and fuels efficiently, and are attracting increasing attention. However, the development of PCCs is restricted by the lack of proper positrode materials. In this work, we report a Co-free system with a nominal composition of BaCe 0.2 Fe 0.8 O 3-δ , which is composed of a Fe-rich matrix phase decorated with Ce-rich nanoparticles. The performance of such a dual-phase positrode system is further improved by doping Zn and/or Ni to increase bulk and surficial concentration of oxygen vacancies. The hydration reaction and surficial adsorption of oxygen species are thereby promoted, benefitting the oxygen reduction reaction. The Ni and Zn co-doped composition Ba(Ce 0.2 Fe 0.8 ) 0.85 (Ni 0.5 Zn 0.5 ) 0.15 O 3-δ exhibits lower polarization resistance than the pristine and singly doped systems, enabling the fuel cells to show high peak power densities of 400, 721, and 828 mW cm −2 at 550, 600, and 650 °C, respectively.
研究领域:
材料科学
·
电化学
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2024
·
IF 6.5
Xiu-Zhi Tang,Ziwen Zhao,Zijian Liao,Jianling Yue,Weiping Gong,He Zhang,Yi Wang
The incorporation of magnetic ingredients is critical for ceramic-based microwave absorbers with high efficiency. However, this task is becoming challenging due to the dispersion and oxidation issues. In this study, metal-organic framework (MOF) ZIF-67 was employed as the precursor of magnetic compounds and combined with a polymer solution to fabricate SiC textiles using the electrospinning technique. The microstructure analysis confirmed the successful introduction of MOF particles within the SiC nanofibers. Further examination of chemical compositions and magnetic properties revealed the encapsulation of magnetic compounds in hybrid SiC textiles. Since the applied fabrication approach ensures a superior dispersion and protection of metal compounds in a ceramic matrix, the microwave absorption of SiC fabric with both dielectric loss and magnetic loss exhibits a high reflection loss of −59.4 dB and a wide effective absorption band of 5.70 GHz. The current fabrication strategy for fabricating microwave absorbers with dual loss mechanisms advances the development of ceramic-based microwave absorption materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FOOD ENGINEERING
·
2024
·
IF 5.3
Haohao Hu,Siyu Yao,Ruihao Niu,Zhaojing Huang,Beijia Wan,Qingqing Zhu,Jianwei Zhou,Donghong Liu,Enbo Xu
As an advanced mode of coaxial 3D printing, its outer layer can be designed to shape a soft 2D inner core to a strong stereoscopic structure. Here, we used oil-based Pickering emulsions stabilized by starch nanoparticle as the inner core, with carrageenan gel as the outer layer. Emulsion cores with different rheological properties greatly influence the overall printability (especially 70% oil content), which have been complemented by fluid dynamics simulation of pressure and velocity distributions (at the ratio of inner core to outer layer of 2:3). Vitamin D (V D ) was used as a functional additive embedded into different emulsions of inner cores and protected both by the inner and the outer layers. Particle size and stability analyses demonstrated that emulsions loaded with V D (even higher than 90% with the protection of outer layer after 15 days) still had a stabilized system.
研究领域:
食品科学
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Sensors
·
2025
·
IF 9.1
Song Xiao,Yuhang Xue,Zhanyuan Li,Chengying Wu,Yifan Zhang,Peng Wu,Ju Tang,Xiaoxing Zhang,Hongye Yuan,Yi Li
Perfluoroisobutyronitrile (C4F7N), an eco-friendly insulating gas, has been extensively utilized in diverse gas-insulated equipment (GIE) to replace the most potent greenhouse gas SF6. Nonetheless, given the low toxicity of C4F7N, the potential leakage risk at a high-pressure operational environment cannot be overlooked, making the development of highly sensitive gas sensors for leak detection essential. Herein, Co3O4 was selected as a specific gas sensing material for C4F7N detection based on the density functional theory screening. The Co3O4-based gas sensor was prepared, and its response performance was systematically evaluated. The interaction mechanism between Co3O4 and C4F7N was also examined by the oxygen vacancy theory. The sensor demonstrates a low detection limit of 0.15 ppm at its optimal operating temperature of 300 °C, exhibiting exceptional selectivity and repeatability, with a stability response time of 55.5 s and recovery time of 1478 s. The sensor’s application potential under actual working settings was validated using a simulated leakage test. Relevant results provide guidance for the leakage monitoring of the C4F7N-based GIE.
研究领域:
材料科学
·
环境科学
·
电气工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DIAMOND AND RELATED MATERIALS
·
2025
·
IF 5.1
Yuanjin Zeng,Yaqi Wang,Longxiang Zhan,Zhuqun Shi,Chuanxi Xiong,Quanling Yang
Traditional electromagnetic shielding materials based on reflection were no longer suitable for the current complex environment. Carbon aerogels have emerged as potential materials for achieving exceptional electromagnetic interference shielding effectiveness (EMI SE) and low reflection. However, it is still a challenge to find a simple method to achieve the heteroatom doping of carbon aerogels. In this work, nitrogen (N)-doped carbon aerogels were successfully obtained using pure chitin serving as the carbon precursor. The obtained carbon aerogels had obvious mesoporous structure, which significantly enhanced impedance matching between the material and air, thereby prolonged the transmission path of electromagnetic waves (EMWs). Furthermore, the doping of N introduced defects that acted as polarization centers, further facilitating the dissipation of EMWs. The chitin-derived carbon aerogels exhibited an impressive EMI SE of 34.4 dB at 900 °C, with effective absorption coefficient exceeding 90 %. This self-doping approach offered valuable insights for enhancing EMI SE in materials and presented a novel strategy for the development of biomass-based carbon aerogels with tunable electromagnetic shielding properties.
研究领域:
材料科学
·
生物材料学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2024
·
IF 10.7
Yuhui Ci,Dong Lv,Xiangjian Yang,Haishun Du,Yanjun Tang
Strong interfacial adhesion between cellulose and other polymers is critical to achieve the properties required for specific applications in composite materials. Here, we developed a method for the simultaneous homogeneous dissolution of cellulose and thermoplastic polyurethane (TPU) in 1,8-diazabicyclo (5.4.0) undec-7-ene levulinate/dimethyl sulfoxide ([DBUH]Lev/DMSO) solvent. This process is essential for preparing cellulose/TPU composite films and fibers through interaction-modulated cellulose regeneration. Both cellulose and TPU can be easily dissolved together in [DBUH]Lev/DMSO solvent under mild conditions. The resulting cellulose/TPU solutions exhibited strong temperature sensitivity, shear-thinning behavior and viscoelasticity, making them suitable for cast films and continuous spinning. More importantly, research findings, including density functional theory calculations and experimental characterization, confirmed the high compatibility and interaction modulability of cellulose and TPU in the composite films. The representative C90T10 sample (cellulose/TPU, 90/10) showed high transparency (90 % at 800 nm) and excellent mechanical properties (tensile strength: 176 MPa; elongation at break: 8.1 %). Additionally, the maximum tensile strength and elongation at the break of the composite fiber from C90T10 were 214 MPa and 48.1 %, respectively. This method may provide a feasible approach to design and produce homogeneous environmentally friendly composites of cellulose and other polymers at the molecular level.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jie Wei,Chao Ma,Tingting Zhang,Ziqiang Shao,Yuxia Chen
Smart actuating materials have received tremendous attention due to their promising applications in miniaturized robots, integrated electronics and wearable devices. However, simultaneously achieving sensitive multi-stimuli responsiveness, preferable energy storage capability and adequate mechanical properties by one material in a simple yet efficient way remains a considerable challenge. Herein, we propose a novel multi-responsive nanocomposite film actuator consisting of negatively charged cellulose nanofibers (CNF), polydopamine-chelated MXene-Fe 3 O 4 nanohybrids (PMF) and positively charged carbon nanotubes (CCNT) via a cost-efficient electrostatic self-assembly approach. Benefiting from the laminated porous structure and compositional superiorities, including the water-induced swelling effect of CNF and PMF, conductive CCNT with countless interior hydrophobic channels and magneto-conductive properties of PMF, the optimized nanocomposite film actuator presents a high bending speed (100.5°/s), ultrashort actuation time (2.0 s), long-term stability (1005 cycles) and good magnetic response. These actuators can be assembled into a supercapacitor exhibiting an areal capacitance of 33.5 mF/cm 2 at 0.5 mA/cm 2 and good cycling stability with a capacitance retention of 80.5 % after 5000 cycles. Furthermore, the actuators are designed as soft robots with different motion modes, mechanical grippers for performing consecutive actions and an integrated circuit system to monitor surrounding humidity changes. This work provides inspiration to develop advanced nanocomposite materials for smart devices that require multifunction integration.
研究领域:
材料科学
·
纳米技术
·
智能设备
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2024
·
IF 12.7
Hailong Liu,Yifan Chen,Mingzhuo Chai,Yiqi Wu,Kangle Xue,Li Liu,Yudong Huang
Considering the development of CFRPs , addressing the challenge through the simplistic industrial operational methods to achieve high strength and toughness in carbon fiber-reinforced epoxy resin (EP) composites (CFRPs) is imperative. In this work, an innovative approach introduced to improve the strength and toughness of CFRPs by application of a nano emulsion encapsulated polyhedral oligomeric silsesquioxane (POSS) sizing agent (POE sizing agent). The employment of a POE sizing agent markedly enhanced the surface energy and roughness of carbon fibers (CF) as well as the interface properties of CFRPs. Furthermore, the 10-PCF (10 wt% POE sizing CF) reinforced EP unidirectional CFRPs demonstrated superior strength and toughness. Relative to the DCF (Desizing CF) reinforced EP unidirectional CFRPs, their interlaminar shear strength , flexural strength , and unnotched impact strength increased by 24.9 %, 37.8 %, and 45.6 %, respectively, reaching 99.8 ± 2.3 MPa, 1376.8 ± 21.6 MPa, and 94.9 ± 4.6 kJ/m 2 . Concurrently, the 10-PCF reinforced EP composite laminates exhibited outstanding impact resistance, minimal damage area, and enhanced compressive strength after impact. Additionally, the strength, bundling, and flexibility of the sized CF were maintained, ensuring the processability of CF. The utilization of POE sizing agent for strength and toughness improvement in CFRPs offers a straightforward and industrially feasible approach. This research opens up a novel strategy for high-performance CF and CFRPs preparation.
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
危险品化学品经营许可证（带存储）