Biomimetics
·
2022
·Vol. 7
·期 2
·72
·
IF 3.743
Yahua Liu,Zhixin Feng,Haiyang Zhan,Wenna Ge,Yuhang Xia,Junqiu Zhang,Shile Feng
Hot-water repellency is of great challenge on traditional superhydrophobic surfaces due to the condensation of tiny droplets within the cavities of surface textures, which builds liquid bridges to connect the substrate and hot water and thus destroys the surface water-repellence performance. For the unique structural features and scales, current approaches to fabricate surfaces with hot-water repellency are always complicated and modified by fluorocarbon. Here, we propose a facile and fluorine-free one-step vapor-deposition method for fabricating excellent hot-water-repellent surfaces, which at room temperature even repel water droplets of temperature up to 90 °C as well as other normal-temperature droplets with surface tension higher than 48.4 mN/m. We show that whether the unique hot-water repellency is achieved depends on a trade-off between the solid–liquid contact time and hot-vapor condensation time, which determines the probability of formation of liquid bridges between the substrate and hot-water. Moreover, the designed surfaces exhibit excellent self-cleaning performance in some specific situations, such as oil medium, hot water and condensation environments. We envision that this facile and fluorine-free strategy for fabricating excellent hot-water-repellent surfaces could be valuable in popularizing their practical applications.
研究领域:
材料科学
·
表面工程
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 12
·5540-5550
·
IF 3.591
Qiang Wei,Gang Zhang,Jie Yao,Xuejun Chen,Gongying Wang,Xiangui Yang
Dimethyl carbonate (DMC) is well known as an extremely industrially valuable substance. The demand for high-efficiency synthesis of DMC has greatly driven the exploration of novel catalysts and their low-cost preparation methods. Herein, a novel method for the rapid batch preparation of CaO/carbon catalysts using calcium citrate (CaCi) was provided, and these catalysts were used to catalyze the transesterification reaction of methanol and ethylene carbonate (EC) to synthesize DMC and ethylene glycol (EG). Accordingly, the structure and properties of the catalysts were characterized using XRD, FTIR, N2 adsorption–desorption, TG, TG-IR, CO2-TPD, XPS, SEM, TEM and ICP-OES techniques. Meanwhile, the effect of various process conditions such as carbonization temperature, reaction temperature, reaction time and catalyst amount has been extensively evaluated. Under the optimal process parameters, the conversion of EC and the selectivity of DMC and EG were 81.2, 99.3 and 99.5%, while the turnover number (TON) and turnover frequency (TOF) were 54.1 and 162 h−1, respectively. Furthermore, kinetic analysis was carried out, and the value of k (reaction rate constant) was ≈0.159 mol L−1 min−1. The reusability was also investigated.
研究领域:
化学工程
·
催化材料科学
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产品关联
DOI
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Chao Yan,Yiqun Fang,Mengfan Yan,Weihong Wang,Yongming Song,Qingwen Wang
As global energy consumption and environmental pollution are becoming more and more serious, the utilisation of biomass materials is gaining more and more attention. In this study, we introduced a cost-effective and simple method for the preparation of hydrophobic wood using natural balsa wood (NW), which involves in-situ growth of stearoyl chloride on the NW surface through a one-step esterification process, converting its hydrophilic surface into a hydrophobic one (denoted as NW-Ste). The results showed an increase in surface roughness (Rb) from 5.6 to 156.5 nm and a contact angle of over 145.2° on the wood surface. Hydrophobic wood has excellent hydrophobicity, reusability and significant thermal insulation properties. Importantly, the inherent mechanical strength of the hydrophobic NW obtained through the treatment remains unchanged, expanding the range of applications for the wood.
研究领域:
材料科学
·
生物质利用
·
环境科学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 15
·11104-11115
·
IF 2.993
Wei Chenjie,Cheng Qi,Lin Ligang,He Zhifu,Huang Kai,Ma Sisi,Chen Li
A novel one-step strategy is proposed for the recyclable polyimide nanofiltration (PI-NF) membranes. By designing the chain structure, the soluble polyimide polymer with coexisted imide rings and flexible pendant groups are fabricated. With the polyimide polymer as matrix, the NF membranes with integrally skinned asymmetric architecture were obtained by a phase inversion method. The structure evolution was demonstrated by scanning electron microscope and atomic force microscope analyses. The rejections of prepared PI-NF membrane for Rose Bengal, PEG 1000 and typical salts under optimized conditions were 92, 91.78, 98.68%, respectively. The rejections of NF membranes for different salts followed the order: Na 2 SO 4 > MgSO 4 > NaCl > MgCl 2 . Furthermore, the fabricated polyimide-based NF membranes show a stable performance during long-time filtration process and exhibit a confirmed excellent recyclable property.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Chunjie Liu,Jing Wang,Hua Huang,Luyang Li,Liang Chen,Haiyan Zhang
Separation materials have focused on porous particles with a microporous structure and a large specific surface area. However, for specific separation processes such as biomacromolecules, cell fermentation liquid, or high viscosity liquids, large pores can substantially reduce mass transfer resistance and enhance mass transfer efficiency. Therefore, a more detailed investigation is required to develop a simple method for obtaining super-macroporous particles. In this work, we presented a strategy that combined gas-shearing and sulfolane freeze casting to obtain poly (methyl methacrylate) (PMMA)-based cryogel particles with a tunable size (476–1873 μm) and polarity (contact angle of 135°–0°). The cryogel particles had a micron-scale porous structure (16.8–46.8 μm), and the volume shrinkage effect during sulfolane crystallization formed unique surface single pores (93.7–294.6 μm) and an internal hollow structure (218.4–615.6 μm). Cryogel particles with high porosity (>75 %) and good hydrophobicity had a high absorption capacity for organic solvents and oils (>15 g g −1 ). Meanwhile, the cryogel particles exhibited a column effect that was 1.3–3.9 times greater than that of the macroporous resin, along with superior adsorption kinetics. This study provides a novel strategy for obtaining super-macroporous particles with tunable particle size and composition, achieving efficient separation in special systems.
研究领域:
生物分离工程
·
材料科学
·
化学工程
·
高分子材料
·
吸附分离技术
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产品关联
DOI
高影响因子
Nanoscale
·
2015
·Vol. 7
·期 33
·13918-13923
·
IF 7.394
Wenlong Gao,Mei Liu,Limei Liu,Hui Zhang,Bin Dong,Christopher Y. Li
Although artificial micromotors have undergone tremendous progress in recent years, their fabrication normally requires complex steps or expensive equipment. In this paper, we report a facile one-step method based on an emulsion solvent evaporation process to fabricate multifunctional micromotors. By simultaneously incorporating various components into an oil-in-water droplet, upon emulsification and solidification, a sphere-shaped, asymmetric, and multifunctional micromotor is formed. Some of the attractive functions of this model micromotor include autonomous movement in high ionic strength solution, remote control, enzymatic disassembly and sustained release. This one-step, versatile fabrication method can be easily scaled up and therefore may have great potential in mass production of multifunctional micromotors for a wide range of practical applications.
研究领域:
材料科学
·
化学工程
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2022
·Vol. 55
·期 38
·384002
·
IF 3.409
Zhen-yu Wang,Cong Li,Jing-yi Li,Zhen-jiang He,Yi Cheng,Cheng Yan,Jing Mao,Ke-Hua Dai,Xia-hui Zhang,Jun-chao Zheng
Lithium-ion batteries have achieved huge success in the field of energy storage, but they use flammable electrolytes that may cause safety issue. Solid polymer electrolytes have been considered as the final solution to this safety issue, which have received many researchers' attention. However, solid polymer electrolytes still face several challenges, such as low ionic conductivity. Herein, we report a quaternary solid polymer electrolyte to achieve high ionic conductivity, which was synthesized by one-step casting method. This quaternary electrolyte contains two polymers (poly(vinylidene fluoride-co-hexafluoropropylene) and poly(ethylene oxide) diacrylate), one plasticizer (succinonitrile), and one lithium salt (lithium bis(trifluoromethane)sulfonimide). Long-chain polymer is used as matrix, and short-chain polymer and plasticizer are used to increase ionic conductivity. This quaternary electrolyte achieves a high ionic conductivity of 1.49 × 10−4 S cm−1 at room temperature. When assembled into coin cell with lithium iron phosphate cathode and lithium metal anode, this quaternary electrolyte achieves a capacity of 139 mAh g−1 at 0.2 C after 50 cycles and 106 mAh g−1 at 1 C after 160 cycles. Moreover, this facile one-step casting method provides a new route towards the development of solid polymer electrolytes.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL RESEARCH
·
2024
·
IF 1
Hao Wang,Yicheng Zhang,Fangyu Gao,Xinhua Zhu,Quanyi Liu,Xuhong Jia
Preparing fluorocarbon surfactant for aqueous film-forming foam is a complex process. Overcoming steric hindrance when introducing imidazolium to the fluorocarbon chain is a key challenge. In this significant work, we proposed a simple one-step route to prepare imidazolium-contained fluorocarbon surfactant under mild conditions. The FT-IR, 1H NMR, 13C NMR, MS, and TG technologies characterized the imidazolium-contained fluorocarbon surfactant by analyzing functional groups, molecular weight, and thermal stability. An equimolar mixture of imidazolium-contained fluorocarbon surfactant and C6H13NaO3S demonstrated high surface activity, enabling the foam to spread effectively on commercial fuels. The spreading coefficient of foam on n-cyclohexane met the US Military Specification. Coordinatively, the foam drained in time to maintain the stability and completeness of the aqueous layer, with a moderate 25% drainage time of 317 s and a proper foam expansion ratio of 10.5. In extinguishing experiments, the imidazolium-contained fluorocarbon surfactant/C6H13NaO3 mixture extinguished test fires in 65 s, suggesting an essential potential in the aqueous film-forming foam formula.
研究领域:
化学工程
·
材料科学
·
消防技术
✓ 已验证
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2025
·
IF 5.1
Tengfei Han,Shufen Zhang,Benzhi Ju
Stalk is an important biomass resource and converting it directly into high value-added products is a major challenge. Herein, we have cleverly utilized three novel techniques, mechanochemistry, Deep eutectic solvents (DES), and dynamic cross-linking, to achieve one-step in-situ plasticization of virtually worthless corn stalk into reprocessable thermoset plastics. This preparation strategy has many advantages, such as cheap and easy availability of raw materials, no need for catalysts, no need for pretreatment of raw materials, and no need for separation and purification of products. The stalk plastics have good mechanical strength, thermal stability, plasticity and reprocessability. In addition, cellulose plastic was prepared as a control experiment for stalk plastic, and the constitutive relationship between the structure of various components in stalk and the performance of plastic was deeply investigated. This strategy of developing new plastics from agricultural and forestry waste in a simple and environmentally friendly way will open up a whole new avenue for the production of more competitive bio-based plastics.
研究领域:
材料科学
·
高分子科学
·
绿色化学
·
生物质利用
·
农业废弃物管理
✓ 已验证
产品关联
DOI
高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
·
2022
·
IF 2.216
Feifei Shao,Tao Xue,Yijing Wang,Yesheng Xu,Xinjie Wang,Xinxin Li
The smart responsive materials have become one of the hottest areas of research in oil/water separation field and there are various studies on preparation technologies. However, most of the materials reported were prepared by coating or coupling to attach functional polymer to substrates, which generally had unstable physical and chemical properties and were difficult to be applied in harsh environments. In this work, we fabricated a smart and durable oil/water separation material by one-step foaming method to graft pH-responsive copolymer onto a polyurethane foam (PUF) substrate. The foam exhibited reversible wettability under different pH environments, had excellent oil adsorption capacity (24.78–64.27g/g) and high oil/water separation efficiency (above 98%). Besides, the foam also showed stable performance and excellent recyclability in a series of durability experiments, including mechanical abrasion, light radiation and chemical immersion. The foam with simple preparation process and excellent stability will have promising application prospects in the field of oil/water separation.
研究领域:
材料科学
·
化学工程
·
环境科学
·
高分子科学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Wei Yang,Chenyuan Weng,Xiaoyun Li,Hongliang He,Jianwen Fei,Wei Xu,Xiaoqiang Yan,Wanying Zhu,Hongsong Zhang,Xuemin Zhou
At present, artificial mimic enzyme has become a powerful substitute for natural enzyme. In particular, the biosensors based on nano-enzymes have been the focus of current research. Herein, a novel magnetic ternary nanocomposite hemin-Fe 3 O 4 @polypyrrole (h-Fe 3 O 4 @ppy) was synthesized by chemical oxidation polymerization. The results showed that the h-Fe 3 O 4 @ppy had stronger peroxidase activity than Fe 3 O 4 nanoparticles (Fe 3 O 4 NPs) and h-ppy NPs, and was indicated by Michaelis-Menten constant (K m ) and maximum initial velocity (V max ). Therefore, we used h-Fe 3 O 4 @ppy catalyzing H 2 O 2 to oxidize the chromogenic substrate TMB, and built Hydrogen peroxide (H 2 O 2 ) and Glutathione (GSH) colorimetric biosensors with the help of signal intrinsic exponential amplification and easy operation. The controllable catalysis was realized by h-Fe 3 O 4 @ppy which was prone to separation. The method of removing h-Fe 3 O 4 @ppy by magnetic separation effectively eliminated the effect of residual catalysis when terminating the reaction. The sensor was then applied to the determination of GSH in biological samples from acute coronary syndrome patients. The linear ranges of H 2 O 2 and GSH were 0.2–100 μM and 0.5–80 μM, respectively. The detection limits of H 2 O 2 and GSH are 0.18 μM and 0.15 μM, respectively. This research not only proposes a new type of nanoenzyme, but also shows the multiple advantages of magnetic nano-enzymes for the construction of biosensors.
研究领域:
分析化学
·
生物化学
·
纳米技术
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Sustainable Systems
·
2025
·
IF 6.1
Zhuhan Xu,Long Li,Mengting Ye,Zhaojun Dong,Luyao Huang,Zhan Liu,Jun Li
Flame retardant properties are critical for the use of foams in packaging and transportation applications. However, the process of preparing conventional flame retardant foams is complex and adversely affects their thermal insulation and mechanicl properties. Here, a convenient and scalable synergistic strategy is reported to prepare synergistic flame-retardant, heat-insulating cellulose-based foams with stabilized laminar structures through a one-step physical blending of ammonium polyphosphate (APP) and vacuum glass microspheres (HGMs), which exhibit lightweight (72.18 mg cm −3 ), enhanced flame retardant properties (pHHR reduced from 109.6 to 67.3 kW m −2 ), excellent barrier effect (E Barrier increased by 45.82%), excellent thermal conductivity (with a thermal conductivity of 59.9 mW mK −1 ) and good mechanical properties (stress of 57.53 kPa at 80% strain). In addition, the foam can be recycled by easy methods. Therefore, the present work provides a feasible approach for flame retardant and heat-insulating bio-based foams and has a wide range of applications in packaging and construction materials.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）