MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Zhenhe Wang,Shujin Ge,Shihao Chen,Xia Sun,Wei Chen,Qiuhong Li
Gaseous amines such as trimethylamine and ammonia are characteristic compounds for monitoring the quality of animal foodstuff like salmon meat. However, there is no existing colorimetric film with both hydrophobicity and UV-proof properties for salmon freshness monitoring in humid and light conditions. Addressing this challenge, a new colorimetric film was developed for monitoring salmon freshness by coating W/O Pickering emulsion containing microencapsulated red cabbage anthocyanin solution onto polyvinylidenefluoride film. The W/O Pickering emulsion was obtained using 3-(Trimethoxysilyl)propyl methacrylate modified TiO 2 @SiO 2 as the emulsifier. The ability of UV resistance and preventing anthocyanin from dissolving out of the film were verified by testing the light and water stability of film. The response of the colorimetric film to gaseous amines was investigated, and the performances including selectivity and linear range were evaluated. Based on this, the colorimetric film was successfully employed to monitor the freshness of salmon within 7 days at 4 ℃.
研究领域:
食品科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Yilan Wu,Chan Lei,Jing Li,Yijie Chen,Hongshan Liang,Yan Li,Bin Li,Xiaogang Luo,Ying Pei,Shilin Liu
This study was designed to improve the stability of medium internal phase emulsion by adjusting the electrostatic interaction between gelatin (GLT) and TEMPO-oxidized bacterial cellulose nanofibrils (TOBC). The influences of polysaccharide-protein ratio (1:10, 1:5, and 1:2.5) and pH (3.0, 4.7, 7.0, and 11.0) on the emulsion properties were investigated. The droplet size of TOBC/GLT-stabilized emulsion was increased with the TOBC proportion increasing at pH 3.0–11.0. Additionally, emulsion had a larger droplet size at pH 4.7 (the electrical equivalence point pH of mixtures). However, the addition of TOBC significantly improved the emulsion stability. The emulsions prepared with TOBC/GLT mixtures (mixing ratio of 1:2.5) at pH 3.0–7.0 were stable without creaming during the storage. It was because the formation of nanofibrils network impeded the droplet mobility, and the emulsion viscosity and viscoelastic modulus were increased with the addition of TOBC. These findings were meaningful to modulate the physical properties of emulsions.
研究领域:
食品科学
·
胶体与表面化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 28
·10513-10531
·
IF 5.7
Xiaoqiang Xiong,Xiaodong Jing,Zitao Chen,Qianqian Zhao,Zuoguang Li,Xi Yang,Qun Wang,Tongyun Zhao,Huayang Gong
Using single loss type media as microwave absorbers to simultaneously achieve low reflection loss, wide-band absorption and thin thickness is a huge challenge. In this work, to combine the high dielectric loss of Pr-doped M-type strontium ferrite and the high magnetic loss of W-type hexaferrites, we improved the traditional sol–gel auto-combustion method via increasing an extra sintering process and successfully prepared xSrPr0.5Fe11.5O19/yBaCo2Pr0.5Fe15.5O27 (x : y = 2 : 1, 1.5 : 1, 1 : 1, 1 : 1.5 and 1 : 2) M/W (M-type hexaferrite/W-type hexaferrite) composite materials with a unique “inlay structure”. The M-phase and PrFeO3-type phase were partially wrapped by the huge W-phase, which resulted in enhanced exchange coupling. Benefitting from the exchange coupling and huge grains, the coercivity and anisotropy fields of composite hexaferrites decreased. Therefore, the natural resonance frequencies of some samples reduced to within 18.00 GHz. High magnetic loss occurs while dielectric loss is preserved due to strong resonance interaction and multiple polarization relaxation mechanisms. Hence, the composite hexaferrites exhibit satisfactory microwave absorption performance on account of the magnetic–dielectric synergistic effect. The effective absorption bandwidth of the prepared materials can cover X and Ku bands at thin matching thicknesses (<2.00 mm). The minimum reflection loss reaches −56.30 dB (d = 1.97 mm), and the maximum effective absorption bandwidth reaches 8.17 GHz (d = 1.63 mm). This work will provide new ideas for improving the absorption performance of ferrite composite materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2023
·
IF 5.4
Peng Zhang,Yuhui Zhao,Jiale Huang,Jie Li,Lin Cao,Jianan Liu,Guofeng Han,Wenbo Du,Lihua Chen,Linlin Xiao,Qiwei Wang,Yingfei Yang,Sheng Zhu,Wei Li
Ni-W-SiC composite coatings with mixed nano- and micro-sized SiC particles are prepared by the pulsed electrodeposition . The microstructure, microhardness , wear and corrosion resistances of the composite coatings were studied as a function of the mixed ratios of nano- to micro-sized SiC. The results showed that the nano-sized SiC can be carried by micro-sized SiC during the deposition process, resulting in a greater amount of nano-sized SiC being incorporated into the composite coatings without agglomeration. The wear resistance of the composite coatings with a mixture of nano- and micro-sized SiC is improved. The highest microhardness is obtained on Ni-W-SiC coating containing a ratio of nano- to micro-sized SiC particles of 1:3. However, as a result of the blockage of the Faradaic current by the inert SiC particles, composite coatings with the highest total SiC content exhibited the best corrosion resistance. Discussions are conducted in detail regarding the effects of mixture particles on microstructure, microhardness, wear and corrosion resistance of the composite coatings. Moreover, the interaction between the nano- and micro-sized SiC during the deposition process are also discussed.
研究领域:
材料科学
·
电化学
·
表面工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Qingxiang Wang,Haiying Yang,Jing Cheng,Kai Zhan,Haodong Wang,Yonggui Wang,Dong Wang,Wanli Cheng,Guangping Han
Efficient separation of water-in-oil (W/O) emulsions is essential for wastewater treatment, yet conventional electrospun membranes often suffer from poor mechanical properties, large inter-fiber pores and structural instability. Here, we propose a coaxial electrospinning strategy that combines a PVDF/CNC core with a PDMS shell to construct a hierarchical superhydrophobic membrane. The incorporation of CNC induces nonsolvent-driven microphase separation during electrospinning, generating spindle- and nanosphere-like surface structures while reinforcing the fibrous network. Meanwhile, the PDMS shell contributes to inter-fiber connectivity and enhances surface hydrophobicity. These synergistic effects result in an interlocked porous architecture that supports gravity-driven separation of W/O emulsions. At 4 wt% CNC, the membrane achieves a water contact angle of 158°, an average pore size of 1.93 μm and a flux of 2890 L m −2 h −1 , while maintaining over 94 % separation efficiency over 20 cycles. This work provides a sustainable strategy for tailoring structures for effective W/O emulsion separation.
研究领域:
材料科学
·
环境工程
·
高分子科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Junjie Xu,Wei Sun,Xiang Xiong,Hongbo Zhang,Lingkun Yang
To improve the mechanical properties and ablation resistance of Cf-reinforced ceramic-based materials, ZrC–W cermet composites (C/C–ZrC–W) were prepared in C/C preforms using slurries and low-temperature reactive melt infiltration , and their microstructure, formation mechanism, and mechanical and ablation properties were investigated. The obtained results revealed that the formation of C/C–ZrC–W composites involved the dissolution–precipitation and C diffusion processes. Owing to the precipitation of W nanoparticles in the ZrC phase and interdiffusion of W/ZrC, the fabricated C/C–ZrC–W composites exhibited superior mechanical properties with a flexural strength of 280.65 ± 12.84 MPa and fracture toughness of 13.87 ± 0.56 Mpa.m 1/2 . The formation of a Zr–W–O dense oxide layer resulted in the excellent ablation performance of the C/C–ZrC–W composites in oxyacetylene flame with a temperature of 2200 °C, and their mass ablation rate and linear ablation rate were 1.14 mg/s and 2.42 µm/s, respectively. The described method can be potentially used for preparing high-strength, high-toughness, and ablation-resistant materials at low temperatures.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 30
·23981-23989
·
IF 3.84
Wei Xu,Chao Lin,Huan Liu,Hongbo Yu,Kai Tao,Shenghu Zhou
Tungsten substituted mesoporous FDU-12 (W-FDU-12) catalysts were synthesized by a one-pot hydrothermal process using F127 as the structure directing agent. The studies of TEM, SAXS and BET illustrated that the highly ordered mesoporous structure of FDU-12 was maintained in the doped W-FDU-12 samples. XPS studies revealed that a high concentration of W5+ species appeared in doped W-FDU-12 catalysts whereas supported WO3/FDU-12 and WO3/SiO2 catalysts only contained W6+ species. Tandem catalytic conversion of 1-butene and ethene to propene through isomerization of 1-butene to 2-butene and consecutive cross metathesis of 2-butene and ethene in a fixed-bed reactor at different temperatures and atmospheric pressure was used to evaluate the catalytic performance of the W-FDU-12 catalyst, combined with MgO. The catalytic results showed that the doped W-FDU-12 illustrated a superior catalytic performance relative to the supported WO3/FDU-12 and WO3/SiO2 catalysts. The higher metathesis activity of W-FDU-12 catalysts can be ascribed to the good dispersion of W species and the incorporation of W species into the framework of FDU-12, forming a substantial amount of W5+, which was beneficial for the cross metathesis of 2-butene and ethene to propene.
研究领域:
催化化学
·
化工工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 51
·期 2
·541-552
·
IF 4.39
Dong Fang,Linlin Zhang,Yongjian Niu,Yuanyuan Wang,Qingxiao Su,Jiao Wang,Cheng Wang
SnO2 is one of the most promising catalysts for CO2 electroreduction. However, the intrinsic low electrical conductivity and weak CO2 adsorption and activation capability have rendered the reaction kinetically sluggish and inefficient. To surmount these hurdles, herein, W was incorporated into SnO2 nanosheets to modulate the electronic structures. Compared with pristine SnO2, the p-band centre of W-doped SnO2 was elevated towards the Fermi level, accompanied by the reduction in the band gap and work function. As a result, both the CO2 adsorption and the electron transfer process were promoted, thus lowering the activation energy barrier for CO2 reduction. Benefitting from these, a maximum faradaic efficiency of 87.8% was achieved for HCOOH at −0.9 V vs. the RHE. Meanwhile, the current density and energy efficiency approached 20.92 mA cm−2 and 60%, respectively. Such performances could sustain for 14 h without obvious fading and exceeded pristine SnO2 and most reported Sn-based catalysts. Tafel slope and reaction order analyses further suggested that the reaction proceeded following a stepwise electron–proton transfer pathway with the formation of CO2˙− as the rate determining step. This work demonstrated the effectiveness of electronic structure tuning in promoting the catalytic performances of p-block metal oxides and contributed to the development of efficient catalysts for sustainable energy conversion and carbon neutrality.
研究领域:
材料科学
·
电化学
·
催化
·
可持续能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Catalysis
·
2022
·
IF 13.7
Min Huang,Shuyi Zhang,Bo Wu,Yao Wei,Xing Yu,Yongping Gan,Tiejun Lin,Fei Yu,Fanfei Sun,Zheng Jiang,Liangshu Zhong
Direct selective methane photooxidation to liquid oxygenates with high productivity and selectivity under mild reaction conditions is highly urgent but remains challenging. Herein, a Cu and W codoped TiO2 (Cu–W–TiO2) photocatalyst was fabricated to enable aerobic oxidation of methane into oxygenates with limited formation of CO2 under ambient temperature. A high oxygenate productivity of 34.5 mmol g–1 with a remarkable selectivity of 97.1% was achieved over the Cu–W–TiO2 photocatalyst. Based on structural characterizations and mechanism studies, it was suggested that the Cu species acted as hole traps, while oxygen vacancies and the W6+-dopant state worked as electron traps. The inhibited recombination of photogenerated carriers contributed to enhanced photocatalytic efficiency. The modulated electronic and band structure promoted the activation of methane and hindered the overoxidation of oxygenates.
研究领域:
化学
·
材料科学
·
环境科学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2025
·Vol. 8
·期 6
·394
·
IF 21.8
Wu Chongji,Yang Lu,Qian Zhu,Yan Zupeng,Sun Xia,Hu Weiqiang,Ma Zongqing
The conventional sintered W-Ni-Fe alloy encounters challenges in achieving both high strength and plasticity simultaneously, primarily due to its inadequate organizational compatibility. To address this issue, we developed a novel approach combining in situ freeze-drying and straightforward liquid-phase sintering techniques to effectively control the microstructure of 93W-4.9Ni-2.1Fe alloys. The corresponding W-Ni-Fe alloy in this work simultaneously takes into account ultrafine W grains (28.3 µm), low W-W connectivity (CW-W = 0.31), and suitable γ phase volume fraction (20.2%), which is currently difficult for traditional W-Ni-Fe alloys to achieve. The minute dimensions of nanopowder play a crucial role in inhibiting Ostwald ripening and facilitating W grain refinement. Additionally, the extensive surface area of nanopowder enhances capillary penetration, leading to effective homogenization of high γ phase volume. As a result, the freeze-dried W-Ni-Fe alloy simultaneously achieves high strength (1010 MPa) and high plasticity (31%), which provides a new insight for the further development of W-Ni-Fe alloy industries.
研究领域:
材料科学
·
冶金学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Jian Zhang,Xiujun Wang,Qiang Liang,Ming Duan,Shenwen Fang,Chunsheng Zhang,Jiaqing Chen
Hydrophobically modified polyacrylamide (HMPAM) is one of the commonly used polymers for polymer flooding. Because it is water soluble, there are many reports on the impact of HMPAM on the stability and treatment of produced water (it is O/W emulsion), but few reports on its influence on the demulsification of W/O crude oil emulsion. In this paper, firstly, three types of HMPAM containing cationic, anionic, and nonionic hydrophobic monomers (abbreviated as P(AM-AANa-N)Cn, P(AM-AANA-S)Cn, and P(AM-AANA-O)Cn, respectively) were synthesized; Then, demulsification experiments and interface behavior experiments (including dynamic interfacial tension, dilatational rheology and dynamic coalescence time measurement) were conducted to investigate the influence of HMPAM on the demulsification performance of a W/O heavy oil emulsion demulsifier D1. The demulsification results showed that HMPAM reduced the dehydration speed of D1, the type of hydrophobic monomer and the length of hydrophobic chain in HMPAM can affect the final water separated of D1. P(AM-AANa-S)Cn, P(AM-AANa-N)Cn with long hydrophobic chain, and P(AM-AANa-O)Cn with short hydrophobic chains had the negative effect on performance of D1. The results of dynamic interfacial tension experiments indirectly showed that HMPAM had the influence on the D1′s conformation and speed of rearrangement at the W/O interface during the water droplet coalescence process, thereby affecting the reduction of elastic modulus ( G ′ ) of W/O interface and the coalescence rate of water droplets. When there was HMPAM in water, the coalescence time of water droplets increased, resulting in the decrease of dehydration rate. At the meantime, HMPAM had an impact on the lg ( G 1 ′ / G demulsifier ′ ) / lg G 1 ′ , thereby affecting the final water separated of D1.
研究领域:
化学工程
·
石油工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
DRUG DEVELOPMENT AND INDUSTRIAL PHARMACY
·
2018
·
IF 1.883
Yi Chen,Qianming Du,Qianqian Guo,Jing Huang,Lina Liu,Xiangchun Shen,Jianqing Peng
The CaCO3 encapsulated liposome with pH sensitivity is an efficient carrier for the delivery of chemotherapeutic drugs. Herein, we provided an innovative method that take advantage of a W/O emulsion to prepare CaCO3 encapsulated liposomes for the delivery of curcumin. The liposomes with both CaCO3 and curcumin encapsulated (LCC) showed high sensitivity to reduced pH (the environment of lysosomes). Due to the inherent pH sensitivity of CaCO3, LCC swelled and released the encapsulated curcumin rapidly in acidic medium. The lysosome escape capability and promoted accumulation of curcumin in the cytosol from LCC was verified with respect to that of curcumin loaded liposomes (CLIPO). Despite the similar cytotoxicity within curcumin preparations in vitro at high concentration, LCC exhibited optimal antitumor effect in an azoxymethane (AOM)/dextran sodium sulfate (DSS)-induced colorectal cancer model, which was attributed to the long circulation time and efficient intracellular delivery of curcumin from LCC. It is suggested that the solubility and cytosolic delivery of curcumin are greatly improved by LCC, which accounts for the increased pharmacodynamic effect of curcumin. Thus, the CaCO3 encapsulated liposomes developed in this study is an ideal carrier for the hydrophobic drugs in potential clinical application.
研究领域:
药学
·
癌症研究
·
药物递送系统
✓ 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）