JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 15
·12002-12015
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IF 2.779
Wang Wenwei,Hu Yongcai,Li Liangjie,Zeng Jinling,Yao Yingbang
In this study, the contents of ethyl cellulose (EC) as thickener in organic vehicle, which also acts as a binder, was examined using various control experiments; dibutyl phthalate (DBP) and dioctyl phthalate (DOP) were used as plasticizers, and acrylic resin (AR) was used as the thixotropic agent. In addition to thixotropic index, Bigham and Casson yield stress models were used for simulation, and the organic vehicle was dynamically simulated via the three interval thixotropy test; the viscosity recovery of the organic vehicle was investigated on the removal of shear stress. When the contents of the plasticizers, DBP and DOP, were 4 wt% and 6 wt%, respectively, the content of the thickener, EC, was 12 wt% and that of the thixotropic agent, AR, was 2 wt%, the comprehensive performance of the organic vehicle was greatly improved, especially in terms of thixotropy and recovery behavior. Our results demonstrate that the current organic vehicle is promising for the application of silver pastes used as inner electrodes in low-temperature co-fired ceramic (LTCC).
研究领域:
材料科学
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化学工程
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DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2025
·
IF 6.3
Zhaoyang Fan,Xu Jia,Linjing Zhang,Wenjie Yang,Lusong Huang,Wei Li,Lin Bao,Wenyan Zhang,Jun Gan
The printing quality of silver pastes is critically dependent on their rheological properties, particularly for the front-side fine-grid system of TOPCon solar cells. This study investigates the synergistic optimization of printing quality and rheology in front-side fine-grid silver pastes for TOPCon cells. Employing three-stage shear tests (3ITT) and yield stress measurements, we systematically evaluated the effects of A-type short-chain silicone levellers and B-type polyacrylate levellers, across varying dosages, on the paste's initial viscosity, thixotropy, recovery kinetics, and printed grid morphology. Results demonstrate that incorporating 0.2 wt% silicone leveller (A-S-0.2 system) significantly enhances paste recovery, achieving 87 % recovery at 17 s with t 50 < 1 s. This performance markedly surpasses both the control group and B-series samples, ensuring morphological stability during screen printing and pre-sintering. Continuous production-line printing verification revealed that formulations A-S-0.23 and A-S-0.25 achieved aspect ratios of 28.9 % and 34.2 %, respectively. Consequently, series resistance was reduced by 19.2 %–26.9 %, and conversion efficiency increased from 26.19 % to 26.59 %. Analysis indicates that the leveller achieves a precise "shear-softening–structural-reconstruction" balance by reducing particle surface energy and suppressing viscosity hysteresis, thereby effectively inhibiting lateral spreading and morphology collapse. This work provides essential design concepts and a theoretical foundation for high-precision fine-grid printing and the fabrication of highly efficient TOPCon devices.
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高影响因子
Scientific Reports
·
2015
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IF 5.578
Caiao Guo,Liang Ma,Yudan Zhao,Anlin Peng,Biao Cheng,Qiaoqiao Zhou,Ling Zheng,Kun Huang
Amyloid formation is associated with multiple amyloidosis diseases. Human calcitonin (hCT) is a typical amyloidogenic peptide, its aggregation is associated with medullary carcinoma of the thyroid (MTC), and also limits its clinical application. Magnolia officinalis is a traditional Chinese herbal medicine; its two major polyphenol components, magnolol (Mag) and honokiol (Hon), have displayed multiple functions. Polyphenols like flavonoids and their derivatives have been extensively studied as amyloid inhibitors. However, the anti-amyloidogenic property of a biphenyl backbone containing polyphenols such as Mag and Hon has not been reported. In this study, these two compounds were tested for their effects on hCT aggregation. We found that Mag and Hon both inhibited the amyloid formation of hCT, whereas Mag showed a stronger inhibitory effect; moreover, they both dose-dependently disassembled preformed hCT aggregates. Further immuno-dot blot and dynamic light scattering studies suggested Mag and Hon suppressed the aggregation of hCT both at the oligomerization and the fibrillation stages, while MTT-based and dye-leakage assays demonstrated that Mag and Hon effectively reduced cytotoxicity caused by hCT aggregates. Furthermore, isothermal titration calorimetry indicated Mag and Hon both interact with hCT. Together, our study suggested a potential anti-amyloidogenic property of these two compounds and their structure related derivatives.
研究领域:
药理学
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生物化学
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分子生物学
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中医药
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DOI
PubMed
高影响因子
POWDER TECHNOLOGY
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2025
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IF 4.6
Yi Guo,Jiaqing Zhang,Changhai Li,Shanwen Zhang,Youjie Sheng,Yang Li
While nanoparticles (NPs) are known to enhance the rheological properties of firefighting foams, the impact of different NPs types on the foam thermo-rheological properties has remained unclear. Short-chain fluorocarbon and hydrocarbon surfactants, and three types of NPs (SiO 2 , Al(OH) 3 , and β-Al 2 O 3 ) were used to prepare the foams. The interactions between NPs and surfactants, as well as their effects on foaming ability, foam stability, and foam thermo-rheological properties, were analyzed. Results indicated that NPs can form aggregates with surfactant molecules, thereby affecting surface tension, pH value, conductivity, zeta potential, viscoelasticity, and viscosity of foam dispersion. NPs can reduce the initial foam height of the foam dispersion from 340 mL to 250–260 mL, and significantly decrease the foaming ability. All three NPs could significantly delay foam drainage and enhance foam stability. At 45 °C, the NPs can decrease foam viscosity and viscoelasticity. The thixotropy of all foams at 45 °C showed different trends, and the foam with Al(OH) 3 NPs showed the best thixotropic structure recovery. Hysteresis behavior at 45 °C of the foam with Al(OH) 3 NPs decreased, but increased in the foam containing SiO 2 and β-Al 2 O 3 . In general, all three NPs could enhance the foam stability and foam thermo-rheological properties, with Al(OH) 3 demonstrating the strongest capability. This study can provide theoretical support for the development of firefighting foam stabilized by NPs.
研究领域:
胶体与界面化学
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材料科学
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消防工程
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流变学
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表面活性剂化学
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DOI
高影响因子
Science Advances
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2024
·Vol. 10
·期 40
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IF 11.7
Yijie Fang,Dantian Zhu,Jingyue Wei,Lei Qian,Rongmao Qiu,Taoyu Jia,Kui Huang,Suwen Zhao,Jun Ouyang,Man Li,Shaolin Li,Yang Li
Achilles tendinopathy is often attributed to overuse, but its pathophysiology remains poorly understood. Disruption to the molecular structure of collagen is fundamental for the onset and progression of tendinopathy but has mostly been investigated in vitro. Here, we interrogated the in vivo molecular structure changes of collagen in rat Achilles tendons following treadmill running. Unexpectedly, the tendons’ collagen molecules were not mechanically unfolded by running but denatured through proteolysis during physiological post-run remodeling. We further revealed that running induces inflammatory gene expressions in Achilles tendons and that long-term running causes prolonged, elevated collagen degradation, leading to the accumulation of denatured collagen and tendinopathy development. For applications, we demonstrated magnetic resonance imaging of collagenase-induced Achilles tendon injury in vivo using a denatured collagen targeting contrast agent. Our findings may help close the knowledge gaps in the mechanobiology and pathogenesis of Achilles tendinopathy and initiate new strategies for its imaging-based diagnosis.
研究领域:
运动医学
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生物力学
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分子生物学
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医学影像学
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DOI
PubMed
高影响因子
JOURNAL OF FOOD SCIENCE
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2018
·Vol. 83
·期 2
·565-573
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IF 2.018
Lingying Luo,Yun Bai,Guanghong Zhou
3-Amino-1,4-dimethyl-5H-pyrido[4,3-b]indole (Trp-P-1) is a group 2B carcinogen characterized by the International Agency for Research on Cancer (IARC) and great efforts have been taken to reduce Trp-P-1 mutagenicity to humans. In this study, the effect of a reduction of Trp-P-1 on intestinal absorption as a promising strategy was investigated. The data showed that when 20 mM Trp-P-1 cotransported with 10 mM of sodium carboxymethyl cellulose (CMC), xanthan gum, or carrageenan, the absorption rate of Trp-P-1 was reduced by 31.5%, 49.5%, or 72.9% in MDCK-MDR1 cell monolayer, respectively; and 64.6%, 83.4%, or 64.1% in rat intestinal tissues, correspondingly. These 3 polysaccharides also reduced pharmacokinetic parameters, that is, C max , AUC 0-t , and AUC 0-∞ , after Trp-P-1 was given to rats intragastrically. However, gum arabic did not exhibit similar effects on Trp-P-1 absorption in vitro or in vivo . The Ames test showed that these 3 polysaccharides reduced Trp-P-1 mutagenicity to Salmonella typhimurium TA98, but gum arabic did not. Isothermal titration calorimetry assay indicated that Trp-P-1 interacted with these 3 polysaccharides. Thermodynamic study showed that the actual value of △ H <0, but its absolute value greater than the corresponding value of T∆S, suggest a specific interaction between Trp-P-1 and these 3 polysaccharides, probably through the hydrogen bond and/or ion interaction. Reduction of Trp-P-1 intestinal absorption using food additives could be one of the strategies to suppress Trp-P-1-induced carcinogenesis in human. Practical Application 1. This study provides insightful information for the food industry how gum arabic, xanthan gum, kappa carrageenan, and sodium carboxymethyl cellulose affect the absorption of Trp-P-1. 2. This study also provides novel information regarding a better formulation for meat products to reduce Trp-P-1 absorption.
研究领域:
营养学
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毒理学
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食品科学
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DOI
PubMed
高影响因子
Nutrients
·
2016
·Vol. 8
·期 12
·799
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IF 3.759
Shu-Fang Xia,Guo-Wei Le,Peng Wang,Yu-Yu Qiu,Yu-Yu Jiang,Xue Tang
Myricetin is an effective antioxidant in the treatment of obesity and obesity-related metabolic disorders. The objective of this study was to explore the regressive effect of myricetin on pre-existing hepatic steatosis induced by high-fat diet (HFD). C57BL/6 mice were fed either a standard diet or a HFD for 12 weeks and then half of the mice were treated with myricetin (0.12% in the diet,w/w) while on their respective diets for further 12 weeks. Myricetin treatment significantly alleviated HFD-induced steatosis, decreased hepatic lipid accumulation and thiobarbituric acid reactive substance (TBARS) levels, and increased antioxidative enzyme activities, including catalase (CAT), superoxide dismutase (SOD), and glutathione peroxidase (GPx) activities. Microarray analysis of hepatic gene expression profiles showed that myricetin significantly altered the expression profiles of 177 genes which were involved in 12 biological pathways, including the peroxisome proliferator activated receptor (PPAR) signaling pathway and peroxisome. Further research indicated that myricetin elevated hepatic nuclear Nrf2 translocation, increased the protein expression of heme oxygenase-1 (HO-1) and NAD(P)H quinone dehydrogenase 1 (NQO1), reduced the protein expression of PPARγ, and normalized the expressions of genes that were involved in peroxisome and the PPAR signaling pathway. Our data indicated that myricetin might represent an effective therapeutic agent to treat HFD-induced hepatic steatosis via activating the Nrf2 pathway and the PPAR signaling pathway.Keywords:myricetin;hepatic steatosis;Nrf2;PPARγ;oxidative stress
研究领域:
药理学
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分子生物学
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营养学
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DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
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2022
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IF 10.723
Rui Yuan,Kai Wu,Qiang Fu
Direct ink writing, as a prospective three-dimensional (3D) printing technique, opens opportunities for offering high freedom to process cellulose into complex shapes. Current challenges are the accomplishment of dimensional accuracy of printed object and its truly 3D configuration, which put stringent requirements to the ink rheology that should be easily flowable under a suitable shear force while can rapidly recover to solid state after the force is removed. In this study, benefiting from the exquisite regulation of residual cellulose microfiber in a dissolved cellulose solution, a remarkable ink with excellent thixotropic property is prepared, which elaborately balance the traditional rheology tradeoff (extrudability and self-supporting) upon the formation of interconnected microfiber network. As a result, the optimized cellulose ink allows the printed object to successfully display arbitrary and truly 3D configurations, such as anatomical heart, ear, rabbit, lamp, and cup, and exhibit fine microstructure with a resolution of 250 μm.
研究领域:
材料科学
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生物材料
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DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2022
·
IF 3.656
Tao Zhang,Qinggang Li
NH 4 VO 3 is an important vanadium source for the preparation of VO 2 . In the previous studies, the extra gas or solid reagents consumption is necessary for the preparation of VO 2 by using NH 4 VO 3 as vanadium source. The current work proposed a facile way for the fabrication of VO 2 (M) by the thermolysis of NH 4 VO 3 under the sealed atmosphere without extra gas or solid reagents consumption. The VO 2 (M) could be successfully synthesized by two step—thermolysis of NH 4 VO 3 at 400 °C under the sealed condition and heat treatment of VO 2 (B) at 500 °C under the N 2 condition. The dosage of NH 4 VO 3 and decomposition temperature had significant influences on the thermolysis process under the sealed condition. The NH 3 produced by the thermolysis provided a protective atmosphere that prevented the oxidization of VO 2 (B) by residual O 2 in the sealed reactor. Furthermore, the VO 2 (M) could be prepared directly under the sealed atmosphere by increasing reaction temperature to 700 °C. In this process, NH 4 VO 3 underwent a phase transition as the follows: NH 4 VO 3 →ammonium vanadium bronze→VO 2 (B)→VO 2 (M). The directly synthesized VO 2 (M) at 700 °C by the thermolysis of NH 4 VO 3 under the sealed condition showed great environmental stability and phase transition performance.
研究领域:
材料科学
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化学工程
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高影响因子
Applied Sciences-Basel
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2022
·Vol. 12
·期 23
·12062
·
IF 2.838
Hua Yan,Lifan Wu,Pingyang Li,Xuan Li,Junxin Zhao,Xiaomin Dong
In this paper, magnetorheological (MR) porous fabric composites were prepared by using non-woven fabrics pretreated with lithium stearate. Due to the porous structure of non-woven fabric and the good stability of lithium stearate, the mechanical properties and sedimentation stability of the composite have been improved. The viscosity, shear stress and dynamic viscoelasticity of different samples were analyzed by rheological properties tests. The results indicate that the mechanical properties of the composite samples containing lithium stearate are improved compared with the MRF (magnetorheological fluid) sample, and its sedimentation stability under non-working conditions is also improved. However, with the increase of lithium stearate content, the improving effect of material performance gradually decreased. The experimental results show that when the magnetic flux density is 0.31 T, the shear stress of the MR porous fabric composite with 1 wt% lithium stearate is about 27 kPa, which increases by 51.1% compared with the MRF sample.Keywords:magnetorheological fluid;rheological properties;composite;pretreatment
研究领域:
材料科学
·
力学
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DOI
高影响因子
Foods
·
2022
·Vol. 11
·期 19
·3020
·
IF 5.561
Furong Hou,Shuhui Yang,Xiaobin Ma,Zhiqing Gong,Yansheng Wang,Wenliang Wang
In this paper, emulsions stabilized byTremella fuciformispolysaccharides (TFP) were prepared and the physiochemical properties were assessed. Results showed that the TFP emulsions illustrated the highest emulsifying activity (EAI) and emulsifying stability (ESI) when the concentration of TFP and oil were 0.8% and 10% (wt%). The higher pH value was in favor of the emulsifying properties, while the addition of NaCl impaired the stability, and the greater the concentration, the lower the EAI and ESI. Besides, the emulsifying and rheological properties and stability analysis were evaluated in comparison with gum arabic, pectin, and carboxymethyl cellulose emulsions. It was discovered that TFP illustrated better storage and freeze-thaw stability, which was proved by the result of zeta-potential and particle size. The rheological measurement revealed that all the emulsions behaved as pseudoplastic fluids, while TFP displayed a higher viscosity. Meanwhile, TFP emulsions tended to form a more stable network structure according to the analysis of the parameters obtained from the Herschel–Bulkley model. FTIR spectra suggested that the O-H bond could be destructed without the formation of new covalent bonds during the emulsion preparation. Therefore, this study would be of great importance for the research of emulsions stabilized by TFP as a natural food emulsifier.Keywords:Tremella fuciformispolysaccharides;emulsifying properties;rheological properties;stability
研究领域:
食品科学
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生物化学
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DOI
PubMed
高影响因子
Frontiers in Pharmacology
·
2022
·
IF 5.988
Dong Zhen,Tang Shu-sheng,Ma Xiao-lan,Tan Bin,Tang Zhao-shan,Li Chang-hong,Yang Zi-hui,Zeng Jian-guo
The protopine alkaloids are widely distributed within the opium poppy family and have a wide range of pharmacological effects. MPTA is a product of the protopine total alkaloids extracted from the Macleaya cordata (Willd.) R. Br. Previously, we reported good anti-inflammatory activity of MPTA as well as oral acute and sub-chronic toxicity studies in rats. In order to perform a systematic toxicological safety assessment of MPTA, oral acute toxicity, genotoxicity (bone marrow cell chromosome aberration test, sperm abnormality test, bone marrow cell micronucleus test, and rat teratogenicity test), and chronic toxicity in mice were performed in this study. In the oral acute toxicity test, the LD50 in ICR mice was 481.99 mg/kg, with 95% confidence limits ranging from 404.27 to 574.70 mg/kg. All three mutagenicity tests tested negative in the range of 60.25–241.00 mg/kg. The results of the teratogenicity test in rats showed no reproductive or embryonic developmental toxicity at only 7.53 mg/kg, which can be considered as a no observed effect level (NOEL) for the teratogenicity test. Therefore, MPTA is safe for use at the doses tested, but attention should be paid to the potential risk to pregnant animals and the safety evaluation and toxicity mechanisms in target animals should be further investigated.
研究领域:
毒理学
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药理学
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遗传学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）