JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2019
·
IF 1.479
Gang Fu,Juncheng Jiang,Dan Wei,Lei Ni,Zhan Dou,Qiang Chen,Zhen Cheng
The utilization of solid particles in aqueous foam has a great potential in improving fire fighting efficiency. In this study, aqueous foam supported by micro fly-ash (FA) was prepared and its stability in a specific type of oil was characterized. Firstly, different amount of FA was added to study the influence of FA concentration on foamability. It showed that within a specific extent, foam expansion ratio increased with the increasing of FA concentration. And compared with conventional foams, oil resistance of FA stabilized foams, which was investigated by analyzing drainage rate and evolution process with a self-made apparatus, was remarkably improved when FA concentration exceed 4.8wt.%. Secondly, SiO2 and Al2O3 particles with different median sizes were used to study the effect of particle size on stability. However, the smaller hydrophilic particles didn’t behave better as expected. Moreover, the foam stability in three hydrocarbons was evaluated in the same way. The results indicated that the short chain hydrocarbons had much stronger detrimental effect to both two-phase foam and three-phase foam. But overall, the three-phase foam stabilized by FA exhibited much better oil resistance, so it can be used as a promising material for pool fire extinguishing and prevention.GRAPHICAL
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
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2020
·Vol. 100
·期 6
·2554-2567
·
IF 2.614
Shasha Wang,Guangjing Chen,Kewei Chen,Jianquan Kan
BACKGROUND Carapax Trionycis is the shell of the soft-shelled turtle. It is rich in minerals, amino acid, peptides, and other nutrients. Current processing and consumption of soft-shelled turtle leads to the waste of huge quantities of Carapax Trionycis in the form of spent materials. In this study, the bioavailability, prebiotic activity, and physicochemical properties of Carapax Trionycis using different processing methods were investigated. The vinegar-quenched Carapax Trionycis (V-CT), fine powders (D0.18, D0.10), and superfine powders (D0.05, D0.025) of Carapax Trionycis were prepared by the vinegar-quenching method, common grinding, and the superfine grinding method. RESULTS The average particle sizes of D0.18, D0.10, D0.05, and D0.025 were 147.82, 77.35, 36.65, and 2.24 μm, respectively. Superfine grinding changed the surface morphology of Carapax Trionycis and promoted the release of active ingredients. D0.025 had the highest polypeptide (8.15%), polysaccharide (1.21%), total free amino acid (232.36 mg 100 g −1 ) and water-soluble extract content (10.74%), and showed the highest calcium release rate (55.64%) after in vitro digestion. The apparent permeability (P APP ) of the resulting Carapax Trionycis samples in the dialysis tubing model and the everted intestinal sac model increased significantly with the decrease in the Carapax Trionycis particle sizes. Furthermore, the five Carapax Trionycis samples significantly stimulated the growth of the tested probiotics and increased lactic acids production after 48 h fermentation compared to the control. The Carapax Trionycis powder prepared by superfine grinding displayed better prebiotic activity than other samples as it significantly induced a greater proliferation of probiotic bacteria and higher production of lactic acid, as well as greater release of free calcium. CONCLUSIONS The results showed that Carapax Trionycis superfine powder D0.025 had the highest active ingredient content, calcium bioavailability, and prebiotic activity. Our approach of developing Carapax Trionycis superfine powder as natural calcium supplement or potential prebiotic would therefore broaden the scope of soft-shelled turtle processing waste utilization in an eco-friendly, cost-effective, and sustainable approach in the future. © 2020 Society of Chemical Industry
研究领域:
食品科学
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营养学
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生物技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Fengyi Wang,Xin Wang,Siying Xu,Jie Wang,Hui Zheng,Peng Zheng,Liang Zheng,Yang Zhang
In response to the growing demand for low-cost, thin-flake, thermal technology of the third-generation management materials, diamond-copper alloys are gaining attention in scientific studies. Among these, diamond micro-powder-based composites offer a promising solution by addressing cost challenges and enabling the fabrication of thinner materials. This study explores the preparation of a chromium carbide (Cr 3 C 2 ) layer deposited onto diamond micro-powder via the molten salt technique, with diamond micro-powder and chromium powder as raw materials. The coating quality as well as the Cr 3 C 2 layer thickness were fine-tuned through adjustments to the molar proportion between diamond micro-powder and chromium powder. The best results were achieved at a molar ratio of 100/4.5, yielding a Cr 3 C 2 layer approximately 180 nm thick. Microstructural analysis revealed that the Cr 3 C 2 layer markedly strengthened the interface adhesion linking diamond micro-powder with copper, while enhancing the wettability of the two materials. At the optimal molar ratio of 100/4.5, the highest thermal conductivity of 431 W·m −1 ·K −1 was achieved. Finite element analysis and real-world application tests further validated the exceptional heat conductivity of the diamond-based composites, confirming their suitability for heat dissipation in electronic packaging applications. This research offers important perspectives on the development of diamond-copper composites with reduced thickness and lighter weight, advancing their application in thermal management solutions.
研究领域:
材料科学
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热管理技术
✓ 已验证
DOI
高影响因子
Journal of Surface Investigation
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2017
·Vol. 11
·期 4
·827-831
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IF 0
Mikhailov M. M.,Neshchimenko V. V.,Chundong Lee,Utebekov T. A.
A comparative analysis of the structure, phase composition, morphology, and diffuse reflection spectra in the region of 0.2–2.5 μm is carried out. Their changes arising from the bombardment of microand nanopowders of yttrium oxide with 100-keV protons and 100-keV electrons is examined. It is found that the reflectance of the nanopowders in the near-IR (infrared) region is less than that of the micropowders and, upon electron bombardment, their radiation resistance is slightly larger as compared to the micropowders.
研究领域:
材料科学
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物理学
✓ 已验证
产品关联
DOI
JOURNAL OF MEMBRANE SCIENCE
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2021
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IF 8.742
Yudong Shi,Ying Hu,Jiabin Shen,Shaoyun Guo
Advanced functional membranes consisting of low surface energy and tailored micropores are promising materials for oil-water separation applications. However, obtaining a high porosity yet controllable pore sizes to achieve high separation efficiency and flux remains challenging. Herein, four kinds of polytetrafluoroethylene (PTFE) powders with different particle sizes were simply sieved from a commercial resin and corresponding microporous membranes were fabricated through paste extrusion and thermal stretching processes. The microporous structure exhibited that choosing smaller powders caused the decrease of pore size but can still maintain a high porosity in stretched membranes, which was difficult to be realized by controlling processing conditions. The increased contact interfaces among small powders were regarded to promote the fibrillation during extrusion, thereby more entangled sites of fibrils were generated and only required a small amount of extension to get the target deformation during stretching. Consequently, more micropores with a smaller size were owned in the membrane by using smaller powders, which gave rise to superhydrophobicity with an ultrahigh water contact angle of 152° and superfast oil infiltration . As expected, the oil-water separation experiment obtained high separation efficiency closing 100% and the flux of 7500 L/m 2 ·h, which were competitive in comparison to most of previously-reported PTFE microporous membranes. More significantly, such an outstanding separation capacity was suitable for many kinds of oils with different densities and almost stable even after 15 cycles. Meanwhile, the microporous structure of the membrane prepared by using smaller powders was also proven to be deformed more slowly when subjected to a large strain. Accordingly, this work provides a new and practical approach for fabricating PTFE microporous membranes suitable for applying in a wide variety of oil-water separation fields.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
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2023
·
IF 6.4
Mengqing Ren,Weilin Wu,Qingsong Shi,Lili Wu,Chaocan Zhang
The micropowder obtained by cryogenic pulverizing flexible polyurethane foam (FPUF) as a filler is a waste recycling approach which is highly efficient and eco-friendly. Currently, the micropowder has merely been applied roughly and simply in various fields, so it makes sense to study its surface activity in depth to achieve quantitative and efficient reuse. This paper is focused on studying the surface physicochemical properties of the micropowder and its reactivity and compatibility as a filler in polyurethane elastomers. The FPUF was pulverized into a particle of 0–900 μm. The hydroxyl and amine values of the micropowder surface increased from 48.82, 5.99 mg KOH/g to 73.78, 9.12 mg KOH/g, respectively, with the decrease of particle size range from 500-900 μm to 0–100 μm. However, the amount of substance of effective active hydrogens that could react with NCO groups in the polyurethane prepolymer was uncertain due to the viscosity and temperature. Thus, a preliminary attempt was to quantify the effective active hydrogens by FTIR coupled with titration of the NCO content. The mixture with 5% FPUF-1 micropowder had the maximum effective active hydrogens of 3.30 mmol, which could react with NCO groups to form new chemical crosslinking sites. Compared with the pure PU film, microcrosslinking and strong hydrogen bonding are contributors to the good mechanical properties of the composite. Thus, the FPUF micropowder as an organic filler exhibits considerable potential for converting thermoset FPUF into value-added performance materials.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
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2021
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IF 5.551
Jie Gao,Yujun Deng,Linfa Peng,Peiyun Yi,Zhongqin Lin
The preparation of hierarchical microstructured surfaces to obtain different wettability has been studied in both academy and industry. Polytetrafluoroethylene (PTFE) is an ideal material for preparing superhydrophobic surface due to its ultra-low surface energy. However, it is still a challenge to prepare hierarchical structure on the surface of PTFE. In this paper, PTFE films with hierarchical structure were successfully prepared by micro powder hot embossing (mPHE) process. Through characterization, the maximum contact angle and minimum sliding angle can reach up to 164° and 5.3° respectively. The influence of processing parameters and particle size on forming qualities was discussed. A dimensionless indicator was proposed to successfully describe the hierarchical character and characterize the relationship between wetting states and forming quality. Finally, a series of mechanical and chemical durability tests were carried out, verifying the practical application value of the prepared PTFE films.
研究领域:
材料科学
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表面工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2025
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IF 5.6
Jiashuang Zhi,Hongmei Wang,Yong Li,Qingyao Zheng,Chenhong Ma,Yue Liu
Using high-purity silica micropowder as the raw material, sintering experiments were performed at different temperatures using spark plasma sintering (SPS) technology. The phase, micromorphology, and internal pores of the sintered samples were characterized by X-ray diffraction, scanning electron microscopy, X-ray computed tomography and other testing methods. These methods explored the phase evolution and the corresponding morphology characteristics of the silica micropowder under the conditions of SPS. Results demonstrate that the solid-phase sintering of silica micropowder starts at 1030 °C, the densification sintering stage begins at 1200 °C, and the densification is completed at 1440 °C. The temperature increase rate was 100 °C/min, and the holding time was 10 min. When the sintering temperature reached 1400 °C the cristobalite phase appeared, and the content of cristobalite was highest at 1500 °C, reaching 13.1 %. As the sintering temperature reaches 1550 °C, the amorphous phase content begins to increase, the porosity and pore size decrease, and a completely transparent quartz glass is obtained at 1600 °C.
研究领域:
材料科学
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陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
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2024
·
IF 2.5
Xiangyu Yuan,Yebing Tian,Cheng Qian,Shadab Ahmad,Zhen Ma,Ling Li,Zenghua Fan
Magnetorheological shear thickening polishing (MRSTP) has the dual effect of shear thickening and magnetization enhancement, thereby enhancing polishing efficiency. MRSTP fluids (MRSTPFs) were prepared using polyethylene glycol (PEG), silicon dioxide (SiO 2 ), carbonyl iron particles (CIPs), and diamond micro-abrasive particles. MRSTPFs containing diamond particles of various sizes were prepared for rheological tests. A rheological hypothesis was proposed regarding the development of CIPs chains and the ability to aggregate PEG and SiO 2 . Rheological tests results indicated that each sample exhibited shear thickening and magnetization enhancement effects under the magnetic field and shear rate. The shear thickening effect decreased with increasing magnetic flux density, while the overall viscosity and shear stress increased. As the magnetic flux density increased from 0 mT to 112 mT, the thickening ratio of MRSTPFs containing 3 μm diamond particles decreased from 18.94 to 1.37, but the peak viscosity increased from 5.208 Pa·s to 3639 Pa·s. The thickening ratios of MRSTPFs with different abrasive sizes showed a slight variation from 0.11 to 1.76 at the same magnetic flux density of 22 mT, 45 mT, 68 mT, 90 mT, and 112 mT, respectively. It demonstrated that the diamond particle size did not have a significant effect on the rheological properties of MRSTPFs. The correctness of the hypothesis was confirmed. The storage modulus of MRSTPFs exceeded the loss modulus at non-zero magnetic flux density, indicating that the MRSTPFs had become semi-solid. The microscopic mechanism showed that the rheological characteristics were determined by the evolution of the chain structure of CIPs and the binding ability of PEG to SiO 2 . This study provided valuable insights into exploring mechanisms of MRSTPFs and demonstrating the potential application of MRSTP.
研究领域:
材料科学
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流变学
✓ 已验证
DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
You Xu,Tong Zheng,Gongbao Guo,Jiahang Li,Hanjing Luo,Haosong Jiang,Weidong Ai,Yue Li,Cundi Wei
As a by-product of coal chemical industry, highly-discharged coal gasification fine slag has caused environmental problems such as land occupation and dust pollution. In this work, a high-ash coal gasification fine slag (AFS) and its ball milling products were selected to replace commercial precipitated silica (P-silica) and Micro-silica (M-silica) to fill Styrene-butadiene rubber (SBR) and Natural rubber (NR), respectively. The results showed that the filler network type of SBR changed from Particle Direct Contact Network (PDCN) to Rubber Shell Contact Network (RSCN) due to the replacement of P-silica by AFS fillers and the vulcanization speed improved. However, the replacement of M-silica by AFS-filler didn't change the filler network type of NR composites and resulted in a decrease of vulcanization speed. In both SBR and NR composites, the vulcanization speed, tensile strength, and activation energy of rubber molecular chain movement increased with the decrease of AFS-filler's particle size, which indicates that the reduction of AFS-filler's particle size is beneficial to the improvement of vulcanization speed and reinforcement. In addition, the T 90 of SBR filled with AFS fillers at 5 phr substitution was reduced by 29.0 %–43.3 % and the tensile strength was increased by 4.6 %–44.6 % compared to pure P-silica filled SBR. More importantly, the substitution of commercial silica by AFS reduces energy consumption in the rubber industry and opens up new ideas for improving the universality of coal gasification fine slag as rubber fillers.
研究领域:
材料科学
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环境科学
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高分子化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Chen Tang,Tuhe Shi,Guohua Xu,Jingbo Yin,Shifeng Yan,Xiaogang Bao
Acquiring rapid and effective hemostasis remains a critical clinical challenge. Current researches focus on concentrating blood components to speed up the hemostatic while ignore the effect of anti-fibrinolysis in promoting blood coagulation. Herein, we designed a novel tranexamic acid (TA)-loaded physicochemical double cross-linked multifunctional catechol-modified hyaluronic acid-dopamine/carboxymethyl chitosan porous gel micropowders (TA&Fe 3+ @HA-DA/CMCS PGMs) for rapid hemostasis and wound healing . TA&Fe 3+ @HA-DA/CMCS PGMs exhibited high water absorption rate (505.9 ± 62.1 %) and rapid hemostasis (79 ± 4 s) in vivo . Catechol groups, Fe 3+ and the protonated amino groups of CMCS induced bacterial death. Moreover, TA&Fe 3+ @HA-DA/CMCS PGMs displayed sufficient adhesion to a variety of wet rat tissues. TA&Fe 3+ @HA-DA/CMCS PGMs on various bleeding wounds , including rat liver injury and tail severed models showed excellent hemostasis performance. The TA&Fe 3+ @HA-DA/CMCS PGMs could promote the healing of full-thickness skin wounds on the backs of rats. The advantages of TA&Fe 3+ @HA-DA/CMCS PGMs including rapid hemostasis, effective wound healing, good tissue adhesion , antibacterial properties and ease of use make it potentially valuable in clinical application.
研究领域:
生物材料
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止血
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伤口愈合
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2022
·
IF 7.425
Sijia Yin,Tisong Liang,Shunshan Jiao,Pu Jing
Micronization affects physicochemical and functional properties of materials and hence might improve the quality of rice bran, following stabilization treatments. The micronization effects of stabilized rice bran via extrusion or radio frequency treatments on their morphology and functional properties, and releasable capability were investigated. Micronization reduced particle size, water binding capacity and swelling capacity of rice bran, and increased their whiteness, water solubility index, and nutrient releasability. However, no significant changes in oil binding capacity and thermal index after micronization were observed. Moreover, micronization could decrease the bulk density of rice bran stabilized by extrusion. The releasability of phenolics, flavonoids, γ-oryzanol, and minerals (K, Mg, Zn and Fe) from rice bran after micronization was improved based on in vitro digestion models. These findings suggested that micronization of rice bran following stabilization, especially extrusion treatment, could improve its functional and nutritional properties. The types of stabilization processing of rice bran, followed by micronization, should be considered practically for functional and nutritional properties.
研究领域:
食品科学
·
营养学
·
化学工程
✓ 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）