JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Kaiyun Wu,Yaxin Chen,Jing Luo,Ren Liu,Guanqing Sun,Xiaoya Liu
This work presented a new concept for designing dual-chamber self-healing microcapsules, which encapsulated both healing and curing species within a single microcapsule via Pickering emulsion photopolymerization . In our strategy, robust SiO 2 spheres encapsulating curing agent were firstly synthesized and used as Pickering emulsifiers to prepare emulsions loaded with self-healing agent and photo-curable monomer . Upon exposure to UV light , the photo-curable monomer underwent photo-crosslinking and converted into microcapsules wall. In the meanwhile, the SiO 2 spheres encapsulating curing agent were trapped in the microcapsule wall. The dual-chamber microcapsule which loaded the healing agent in its core and curing agent within its shell, was thus prepared. The presence of both the encapsulated healing and curing agent within a single capsule was demonstrated by infrared spectrometry and thermogravimetric analysis . Upon fracture, the healing agent and curing agent are released simultaneously from the dual-chamber microcapsule, which facilitates the interaction of the two agents, and enhances the healing efficiency. Up to 85% healing efficiency of the epoxy resin was achieved in 1 h, which was much higher than that of the traditional double microcapsules self-healing system (65%), demonstrating the excellent self-healing performance of the dual-chamber microcapsules. It has been demonstrated that the coating based on dual-chamber microcapsule presented reliable and outstanding self-healing anti-corrosion efficiency. By changing the species of healing agent, curing agent and wall substances (photo-curable monomer), the as-prepared dual-chamber microcapsules can meet different requirements of versatile self-healing system.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
·
2024
·
IF 4.1
Naipin Chen,Fang Wang,Jiajun Wang,Jiaqi Liu,Xinbao Zhu
It has been urgent that timely repair of microdamage generated during long-term service of metal insulation coatings. Hereby, we developed a novel self-healing dual-chamber microcapsule with particle size about 5 μm, in which furfuryl amine modified polystyrene-acrylic acid (PSAF) as shell material and photosensitizer Carbon dots (CDs) as Pickering emulsifier. The synthesized materials were characterized analytically, FTIR and DSC demonstrated the simultaneously existence of healing agent and curing agent in the resultant dual-chamber microcapsule. Experiments also showed microcapsules exhibited satisfying storage stability more than 20 d at room temperature as well as thermogenesis effect that allowing temperature of epoxy composite materials raised to 50 °C in 60s and fractures to be effectively minimized in time. The scratch tensile measurement results demonstrated that epoxy resin composites incorporated with 2 wt% microcapsules exhibited the optimal strength self-healing efficiency, modulus, toughness and anti-fatigue performance. Furthermore, surface characterization and EIS analysis also confirmed the long-lasting healing effect of EP/MC 2% complex coating with outstanding corrosion resistance . Therefore, the photothermal responsive dual-chamber microcapsule designed in this work has application as self-healing material especially epoxy anti-corrosion coating.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2025
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IF 2.8
Naipin Chen,Jiaqi Liu,Lingqi Deng,Fang Wang
Microcapsule-based self-healing systems, capable of remediating epoxy resin fatigue microcracks, present promising prospects for prolonging their service life. However, there is a pressing need to improve the mechanical properties, especially toughness, of the composite resin. Herein, a dual-compartment microcapsule was proposed to ingeniously integrate into the epoxy resin matrix, which could endow the composites with improved toughness and the remarkable capability of self-repair against intrinsic injuries. Preparation methods included the soap-free emulsion polymerization for PSA nanoparticles loaded with the healing agent, alongside the development of PDA nanoparticles encapsulating a catalyst through Pickering emulsion polymerization. Subsequently, a composite microcapsule was assembled via a coupling reaction between PSA and PDA nanoparticles. Self-healing performance indicated that the incorporation of 2 wt% microcapsules could significantly restore the tensile strength of epoxy resin to 68.37%. Remarkably, the long-term anti-corrosion of the epoxy coating with microcapsules was typically improved using electrochemical impedance spectroscopy measurements. The low-frequency impedance logarithm value of the composite coating remained stable at approximately 7.1, whereas the pure epoxy coating has dropped to 4.8. Furthermore, epoxy/microcapsule composite resin exhibited UV aging resistance and commendable storage stability at ambient conditions. This strategy provides epoxy resin with improved toughness, corrosion resistance, anti-UV irradiation, and self-healing performance.
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
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Fanbin Zhang,Xia Qin,Cuicui Xu,Xiyang Li,Hongyun Ren,Xingwei Tao,Xujie Lan
A novel self-breathing gas diffusion electrode was developed by loading carbon nanotubes (CNTs) and carbon black (CB) onto the surface of graphite felt through vacuum filtration. This electrode features a well-structured mesoporous network and a stable three-phase interface, which enable efficient oxygen mass transfer and enhance the self-breathing capability. The incorporation of carbon nanotubes and carbon black significantly boosts the electrode's catalytic performance. In a dual-chamber reactor operating at a current density of 12 mA/cm 2 and an initial pH of 3, the system achieved an H 2 O 2 concentration of 4,691 mg/L within 1 hour, with an energy consumption of 6.58 kWh/kg H 2 O 2 substantially outperforming conventional gas diffusion electrodes. The dynamic pH regulation in the dual-chamber system optimizes the 2e - ORR pathway, leading to corresponding changes in proton transfer pathways and adsorbed species within the Helmholtz plane. Additionally, the presence of reactive hydrogen (H*) enhances the chemisorption of O 2 and facilitates its hydrogenation to form the *OOH intermediate. The electrode exhibited excellent stability, maintaining H 2 O 2 yields above 4000 mg/L over 5 cycles and nearly complete degradation of the simulated contaminants within 30 min in an electro-Fenton system application. These results highlight the electrode's potential for efficient H 2 O 2 synthesis and environmental remediation.
研究领域:
环境科学
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材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
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2022
·
IF 4.446
Qian Wei,Bowen Li,Xia Zhao,Feng Jiang,Yumin Xu,Xiaoning Jia
The feasibility and superiority of bioelectrochemical systems for the degradation of p -bromoaniline ( p -BrA) have been confirmed previously. In this research, the influences of the cathode potential and initial p -BrA concentration on the performance of microbial electrolytic cells (MECs) were investigated. The degradation performance and degradation kinetics of a MEC and a conventional anaerobic reactor (CAR) were compared to analyze degradation products. The microbial species diversity in the MECs was studied to analyze changes following the introduction of electric potential. The optimized solution had a cathode potential of 0.5 V, an initial concentration of 50 mg/L, and a pH value of 7. Under these conditions, the removal efficiency for p -BrA was 94.94 %. In addition, after transitioning from a CAR to an MEC, the bacterial species diversity of the biocathode took place significant changes. Several types of aniline-degrading bacteria, such as Proteobacteria and Patescibacteria, and methane-producing bacteria, such as Anaerolineaceae, were dominant in the community of the cathodic biofilm. Experimental results showed that the removal of p -BrA degradation products was closely related to the diversity of cathode bacteria.
研究领域:
环境科学
·
微生物学
✓ 已验证
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2022
·
IF 8.047
Xuliang Pang,Hongye Bai,Yifei Huang,Huaiquan Zhao,Guoli Zheng,Weiqiang Fan
The biomass-derived 5-hydroxymethylfurfural (HMF) oxidation holds great significance for the sustainable production of value-added chemicals. However, the construction of active species with efficient oxidative-activity of alcohol/aldehyde still faces a great challenge. In this work, the reconstruction of CuO/Ni MOF successfully implanted CuOOH/NiOOH and deeply clarified their catalytic mechanism for HMF oxidation. It is worth noting that CuOOH/NiOOH exhibited an excellent self-healing ability during HMF oxidation, further realizing the reproducibility and long-term stability of catalyst. Moreover, a two-chamber electrocatalytic system combining HMF oxidation with 4-nitrophenol hydrogenation was established based on the activated CuO/Ni MOF. As a result, the overall reaction achieved a current density of 47.6 mA/cm 2 at 0.55 V vs Ag/AgCl (3.0 h), and the corresponding conversion rate and Faraday efficiency reached nearly 100 %. This study provides new insight into the electrocatalytic-reconstruction strategy to implant active species for alcohol/aldehyde oxidation.
研究领域:
化学
·
催化材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2022
·
IF 8.91
Chengze Yu,Jiaqi Hou,Bin Zhang,Shiqi Liu,Xiangrui Pan,Heng Song,Xiangting Hou,Qinghua Yan,Chengzhi Zhou,Guocheng Liu,Yingjie Zhang,Yanjun Xin
The dual-chamber photoelectrocatalytic (PEC) system possess advantages in the degradation efficiency and processing cost of organic contaminants . In this study, TiO 2 nanotube arrays modified by rGO and g-C 3 N 4 (rGO/g-C 3 N 4 /TNAs) photoelectrodes were successfully prepared. The surface micromorphology , chemical structure, crystal structure, and basic element composition of rGO/g-C 3 N 4 /TNAs photoelectrodes were studied by SEM , FTIR, XRD , Raman, and XPS . UV–vis absorption, photoluminescence (PL) spectra, and photoelectrochemical (PECH) tests were used to explore the photoelectrochemical characteristics of rGO/g-C 3 N 4 /TNAs photoelectrodes. Under simulated sunlight illumination, the dual-chamber PEC system with external bias voltage was used to investigate the degradation of oxytetracycline (OTC) on rGO/g-C 3 N 4 /TNAs photoelectrodes. The results showed that rGO and g-C 3 N 4 were successfully loaded on TNAs, and the separation efficiency of electrons and holes at rGO/g-C 3 N 4 /TNAs photoelectrodes was improved. The light absorption range of rGO/g-C 3 N 4 /TNAs photoelectrodes extends to the visible light region and has better light absorption performance. Compared with the photocatalytic process, when 1.2 V bias voltage was applied, the degradation efficiency of OTC in anode and cathode chambers in PEC were increased by 3.28% and 44.01% within 60 min, respectively. In addition, the anode and cathode chambers have different degradation effects on OTC. Both the external bias voltage and initial pH have significant effects in cathode chamber, but have little effect in photoanode chamber. The fluorescence excitation-emission matrix spectra and liquid chromatography-tandem mass spectrometry showed that there were different intermediates in the degradation process of OTC. This study indicated that for the dual-chamber PEC system, rGO/g-C 3 N 4 /TNAs photoelectrodes exhibited excellent photocatalytic performance and have potential application prospects in water environmental remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2025
·
IF 6.3
Min Wang,Jinghong Fang,Baoning Zhang,Yingchao He,Qiong Sun,Liyan Yu,Lifeng Dong
A dual-chamber photocatalytic fuel cell (PFC) was constructed using commercial P25 TiO 2 as the photoanode and a zeolitic imidazolate framework-67-polypyrrole (ZIF-67/PPy) composite as the cathode. The incorporation of ZIF-67 into PPy altered the cathodic oxygen reduction reaction from a 4-electron transfer route to a 2-electron pathway, with H 2 O 2 as the primary product. Under irradiation, the ZIF-67/PPy composite outperformed both bare ZIF-67 and PPy cathodes, achieving the fastest degradation of polyvinyl alcohol (PVA) in both chambers and the highest photoelectrical conversion performance in the PFC. However, the absence of Fe 3+ ions in the cathode chamber significantly hindered the degradation rate. Radical quenching tests confirmed the production of OH· radicals during the cathodic reaction, highlighting the role of the Fenton-like reaction between Fe ions and H 2 O 2 generated from oxygen reduction reactions, alongside other oxidative species such as O 2 −· and h + from the photocatalytic reaction. In summary, the novel ZIF-67/PPy composite cathode demonstrated excellent performance in wastewater purification, photoelectrical conversion, and long-term stability, making it a promising candidate for practical PFC applications.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Heming Wang,Xueyong Song,Huihui Zhang,Pan Tan,Fanxin Kong
An ion exchange membrane (IEM) is an important component in dual-chamber microbial fuel cells (MFCs) to separate cathodic chromium from anode bacteria to avoid toxicity. Common used IEMs (e.g., BPM, CEM, PEM, AEM) have different ionic transfer abilities which could influence MFC performance and chromium removal. Additionally, to distinguish chromium “removal” or “reduction” by MFCs, the chromium removal in this study was further analyzed into cathodic reduction, adsorption on the membrane and permeation through membrane to the anode chamber. It was found that BPM achieved the best performance in removing hexavalent chromium (99.4 ± 0.2 %) and balancing pH and conductivity in both chambers, followed by AEM (97.9 ± 0.8 %) and CEM (95.6 ± 0.8 %), while PEM can not well maintain pH and conductivity leading to the worst anode performance and lowest chromium removal efficiency. However, the adsorption of chromium on the AEM accounts for 91.1 ± 0.7 %, which was much higher than the other three membranes. The permeation of chromium through the membrane were all lower than 0.2% which can be ignored. SEM and EDS results showed that chromium deposits and bacteria were detected on the membrane facing cahtode and anode, respectively, indicating that membrane scaling and fouling were inevitable and happened within 24 h operation.
研究领域:
环境工程
·
化学工程
·
电化学
·
水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2022
·
IF 3.898
Suhang Jiang,Lijuan Tan,Yujia Tong,Lijian Shi,Weixing Li
Hydrogen peroxide synthesis by electro-reduction of O 2 to substitute the current anthraquinone process has attracted a great deal of attention. Low oxygen utilization rate and low hydrogen peroxide production remain obstacles to electro-Fenton application. In situ H 2 O 2 generated by electrochemical reaction depends on the electrochemical performance of the cathode and the structure of the reactor. Here, novel graphite felt (GF) modified by La-doped CeO 2 (La–CeO 2 ) was developed as a cathode. A new double chamber electro-Fenton reactor was proposed, where an organic ultrafiltration membrane was used to prevent H 2 O 2 from spreading to the anode. The effects of hydrothermal temperature, time and urea concentration on the electrochemical properties of graphite felt were investigated. The accumulated concentration of H 2 O 2 on the modified cathode reached 218.4 mg·L –1 in 1 h when the optimal conditions of hydrothermal temperature 120 °C and urea concentration 0.55% (mass) in 24 h. The degradation rate of methyl orange reached 98.29%. The new electro-Fenton reactor can efficiently produce hydrogen peroxide to degrade various organic substances and has a high potential for treating wastewater in the chemical industry.
研究领域:
环境工程
·
化学工程
·
废水处理
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Yi Wang,Ruge Lin,Laiming Zhang,Suqing Lan,Xingqian Ye,Haibo Pan,Shiguo Chen
Phenolic compounds are popular in screening novel hypoglycemic agents, but the impact of oxidative degradation on the determination of α-glucosidase inhibitory activity and bioavailability is unclear. Here we showed 12 phenolic compounds structure-dependently degraded during standard simulated digestion, while in physiological hypoxia their retention rates were all over 87.89 %. This enhancement of digestive stability resulted in the biggest drop of 31.72 % in IC 50 against α-glucosidase and a significant increase in bioavailability. Enzyme kinetic and multi-spectroscopic analysis confirmed oxygen weakened the affinity of compounds to α-glucosidase, but the mechanisms were not changed. Moreover, a two-chamber culture system was designed to meet conflicting demands for oxygen between epithelium and cavity, and better α-glucosidase inhibitory activities (51.61 % maximum reduction in glucose production) and absorption rates (up to 1.10 % from undetectable) were obtained than those of uncontrolled oxygen. Hence, the oxygen level should be monitored to assess the activities of phenolic compounds in vitro .
研究领域:
药理学
·
生物化学
·
营养科学
·
体外测试
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Hejia Sun,Hui Zheng,Qiming Tang,Yuman Dong,Fengmei Qu,Yaolei Wang,Guang Yang,Tao Meng
A simple process is developed for the one-step preparation of dual-compartment alginate microcapsules with controlled size and structure from microfluid-generated water-in-water-in-oil (W/W/O) emulsion droplet. Unlike other methods that rely on transient W/W/O emulsion droplet, we introduce an aqueous two-phase system (ATPS) to form a stable W/W/O emulsion droplet as a template for preparing dual-compartment alginate microcapsules. Two different bioactive molecules are able to be spatially confined encapsulated in the shell and core of alginate microcapsules due to the partitioning effect of ATPS and the high viscosity of alginate solution. Moreover, an enzyme cascade reaction with a spatial confined glucose oxidase and horseradish peroxidase in the shell and core of alginate microcapsules confirms its excellent biocompatibility and high activity. This method provides a green platform for enzyme-catalyzed tandem reactions and controlled sequential release of multiple drugs based on alginate microcapsules.
研究领域:
材料科学
·
生物技术
·
化学工程
·
药学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）