POWDER TECHNOLOGY
·
2025
·
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
·
材料科学
·
消防工程
·
流变学
·
表面活性剂化学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2022
·
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
·
生物材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Applied Sciences-Basel
·
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
✓ 已验证
产品关联
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
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Minerals
·
2025
·Vol. 15
·期 3
·251
·
IF 2.2
Jiajun Zhang,Guanzheng Zhuang,Jinrong Chen,Wenxiao Fan,Jixing Fan,Zhuhua Kuang,Dong Liu
This study systematically investigates the colloidal stability, rheological properties, and filtration behavior of palygorskite–montmorillonite mixed clays in both freshwater and seawater systems. By varying the mass content and dispersion medium (freshwater/seawater), we analyze the colloidal stability, zeta potential, flow curves, viscosity, shear-thinning behavior, thixotropy, and fluid loss of the dispersions. The results show that palygorskite exhibits good rheological performance in both freshwater and seawater, while montmorillonite performs better in freshwater but suffers a significant decline in seawater. However, palygorskite demonstrates high fluid loss, which is unfavorable for drilling fluid function. Mixed clays can mitigate the limitations of individual clays to some extent, but the specific performance depends on the clay mineral content and dispersion medium. In freshwater, a small amount of montmorillonite improves the viscosity and shear-thinning behavior of the dispersion, with optimal montmorillonite contents of 22% and 38%, respectively. The thixotropy and fluid loss reduction in the mixed clays are positively correlated with montmorillonite content. In seawater, the rheological performance inversely correlates with Mt content due to montmorillonite’s high sensitivity to electrolytes. The addition of Pal enhances the colloidal stability and rheological properties of the mixed clays in seawater. This work provides theoretical insights into the behavior of mixed clays in different media, offering valuable guidance for the design of seawater-based drilling fluids.
研究领域:
地质学
·
材料科学
✓ 已验证
DOI
高影响因子
PETROLEUM SCIENCE AND TECHNOLOGY
·
2024
·
IF 1.3
Haiyang Tian,Yunfeng Shi,Hongping Quan,Zhiyu Huang
The crosslinked polymer acid solution relies on a crosslinking agent to form a high-viscosity gel under the condition of weak hydrochloric acid concentration (pH value of about 2–4), and it is difficult to form a high-viscosity gel at high hydrochloric acid concentration. In this work, calcium chloride was investigated as a promoter to enhance the thickening and rheological ability of a self-thickening agent, at high temperature and high concentrations of hydrogen chloride. The results demonstrated that 10 wt.% of calcium chloride can greatly increase the viscosity of a self-thickening acid in the range of high concentration acid (15–10wt.% of hydrogen chloride), which is conducive to the early diversion of the acid solution and better realizes the deep acidification of low permeability formation. Thus, this study provides a novel perspective for developing new self-diverting agents.
研究领域:
石油工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2025
·
IF 7.7
Wei Wang,Hong Cao,Jian You,Yongzhao Li,Weihe Yu,Huaiyin Chen,Longmin Liu,Meihua Wu,Yuekun Lai,Weilong Cai
As the raw material for fabricating polyphenylene sulfide (PPS) fibers, PPS resin exhibits great processing and application value. However, the oxidative cross-linking among PPS molecules at high temperatures causes increasing melt viscosity and decreasing fluidity, making PPS processing difficult and lower production quality and efficiency. In this research, we realize the dual improvement of PPS resin in the fluidity and oxidation resistance by introducing a new AO-g-C 3 N 4 composite modifier. First, an antioxidant (AO) was grafted onto the surface of graphitic carbon nitride (g-C 3 N 4 ) through amination to synthesize AO-g-C 3 N 4 . Subsequently, AO-g-C 3 N 4 was incorporated into PPS resin using the melt extrusion process, yielding a novel flow-enhancing and antioxidant PPS-based composite material. It is found that the AO-g-C 3 N 4 /PPS material possesses excellent properties with a significantly raised melt index (>50 %) and notably decreased shear viscosity (>20 %). Besides, the dynamic oxidation induction temperature of AO-g-C 3 N 4 /PPS has increased, indicating inhibited oxidative cross-linking, while the crystallinity has increased. These suggest that the incorporation of AO-g-C 3 N 4 into PPS resin can enhance its fluidity and antioxidation properties, providing valuable insight for the modification research of PPS resin. The AO-g-C 3 N 4 /PPS exhibits the characteristic of easier processing, which offers promising prospects for developing the downstream industry of PPS resin.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
RHEOLOGICA ACTA
·
2024
·
IF 2.3
Sun Li,Wang Geng,Zhang Chunwei,Liang Tianqi
We have found that the unique particle properties of fly ash can be applied to the modification of shear thickening fluid. In this paper, rheological properties and microscopic thickening mechanism of fly ash/silicon-based shear thickening fluid (subsequently abbreviated as FA/SiO 2 -STF) are studied. Ultrasonic technology and mechanical stirring method were used to prepare FA/SiO 2 -STF with different mass fractions of fly ash, and then rheometer was used to carry out steady-state rheological testing for FA/SiO 2 -STF, and 4%FA/SiO 2 -STF dynamic rheological test and temperature sensitivity testing, respectively. The thickening mechanism of FA/SiO 2 -STF was analyzed by scanning electron microscope. The rheological test results show that the FA/SiO 2 -STF with 4% fly ash content exhibits remarkable shear thickening effect. Finally, the relationship between the viscosity and shear rate of FA/SiO 2 -STF is numerically described by a mathematical model, which can accurately reflect the viscosity thickening effect.
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
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2020
·
IF 1.701
Kai Zheng,Yilin Deng,Hui Cao
To improve the properties of xanthan gum (XG), 3-chloro-2-hydroxypropyltrimethylammonium chloride and propylene oxide were used as modifiers to etherify XG and to obtain cationic hydroxypropyl xanthan gum (HCXG), and cationic hydroxypropyl xanthan gum (CHCXG), further optimized by super-gravity reaction. The structure of the product was characterized by infrared spectroscopy and nuclear magnetic resonance. The rheological properties of XG, HCXG, and CHCXG solutions and their performance as fracturing fluids were studied. Infrared and nuclear magnetic test results showed that the cationic etherification agent and hydroxypropyl group were successfully connected to XG, and the degree of substitution of CHCXG was higher. The rheological properties of the CHCXG solution and the performance of the fracturing fluid base fluid were superior to those of the XG and HCXG solutions. The viscosity of the solution after the super-gravity modification was further increased, and the apparent viscosity of the 0.4% CHCXG solution was 28.96% higher than that of the HCXG solution. After XG modification, the solution strength, yield stress, viscoelasticity, temperature resistance, and shear resistance were all significantly improved. The rheological properties of the HCXG solution and the performance of the fracturing fluid base fluid are good and can be used for fracturing fluid thickener.
研究领域:
生物化学
·
材料科学
·
石油工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
·
2022
·Vol. 34
·期 7
·04022148
·
IF 3.651
Min Qiao,Jian Chen,Nanxiao Gao,Guangcheng Shan,Jingzhi Wu,Bosong Zhu,Qianping Ran
To explore the potential application of high-performance viscosity-modifying admixtures (VMAs) is of great importance. In this work, the effects of the adsorption group and molecular weight of VMAs on the properties of fresh cement paste were studied. A series of copolymers having similar molecular weights but different adsorption groups (carboxyl, sulfonic, and quaternary ammonium groups) were compared for the first time. A series of copolymers having the same chemical structure but different molecular weights were also compared. The adsorption, fluidity, bleeding, and rheological properties of the fresh cement paste mixed with different copolymers were tested. The results show that the copolymer, having stronger adsorption group (carboxyl group) and higher molecular weight, could decrease the bleeding and fluidity while enhancing the stability of the fresh cement paste more effectively. The study may help explore ideal materials for the design and preparation of synthetic polymer VMAs.
研究领域:
材料科学
·
土木工程
✓ 已验证
DOI
高影响因子
ACS Omega
·
2020
·
IF 2.87
Bahati Adnan Hamad,Miao He,Mingbiao Xu,Weihong Liu,Musa Mpelwa,Shanfa Tang,Lijun Jin,Jianjian Song
Exploring deep and ultradeep wells has rapidly become more significant to meet the global demand for oil and gas. The study of rheological and filtration-loss properties is essential to designing drilling muds and determining their performance under operational conditions. Rheological and filtration-loss properties of drilling muds were found to have a negative impact when exposed to elevated temperatures in the wells. In this study, an amphoteric polymer (abbreviated to PEX) was synthesized and characterized using a combination of analyses: FTIR, SEM, 13CNMR, and TGA. The synthesized PEX was used as an additive in water-based drilling muds to improve rheological properties and reduce fluid loss at elevated temperatures (180–220 °C). The experimental results demonstrated that inclusion of an optimal concentration of PEX (0.3 wt %) into the drilling mud formulation increased the rheological properties by 62.3% and decreased the filtration loss by 63.5% at an aging temperature of 180 °C. Moreover, PEX was found to perform superbly compared to polyanionic cellulose (PAC-LV) and polyacrylamide (PAM), the widely used drilling mud additives. PEX not only improved the rheological properties and reduced the filtration loss behavior but also bolstered the thermostability of the drilling mud formulation. It was concluded that the rigidity and amphoteric nature of PEX accounted for the exceptional performance and temperature resistance for PEX-drilling mud formulations. Succinctly, PEX exhibits admirable properties in smart drilling mud formulations for drilling operations under high-temperature geothermal conditions. Moreover, in terms of rheological models, the Herschel–Bulkley model adequately described the rheological properties of all the studied drilling mud formulations.
研究领域:
石油工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2020
·
IF 2.87
Jingyuan Ma,Boru Xia,Peizhi Yu,Yuxiu An
Acrylamide polymers were widely used as oilfield chemical treatment agents because of their wide viscosity range and versatile functions. However, with the increased formation complexity, their shortcomings such as poor solubility and low resistance to temperature, salt, and calcium were gradually exposed. In this paper, acrylamide (AM)/2-acrylamide-2-methyl-1-propane sulfonic acid (AMPS) copolymers were synthesized by aqueous solution polymerization and inverse emulsion polymerization, respectively. The aqueous polymer (W-AM/AMPS) and the inverse emulsion polymer (E-AM/AMPS) were characterized by Fourier transform infrared (FTIR) spectroscopy, nuclear magnetic resonance (1H NMR), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and particle size analysis. The rheological properties, filtration properties, and sodium ion (Na+) and calcium ion (Ca2+) resistance were investigated. The results showed that E-AM/AMPS not only had a dissolution speed 4 times faster than that of W-AM/AMPS but also had superior shear-thinning performance both before and after aging. The filtration property of the bentonite system containing 2 wt % E-AM/AMPS was also better than that of the bentonite system containing 2 wt % W-AM/AMPS. In addition, E-AM/AMPS also exhibited extremely high tolerance for Na+ and Ca2+. The huge difference between rheological and filtration properties of E-AM/AMPS and W-AM/AMPS in drilling fluid can be attributed to the differences in the polymer microstructure caused by the two polymerization methods. Both FTIR and 1H NMR results showed that more hydrogen bonds were formed between E-AM/AMPS molecular groups and molecular chains, which led to a cross-linked network structure of E-AM/AMPS which was observed by TEM. It was this cross-linked network structure that made E-AM/AMPS have a high viscosity and allowed it to be better adsorbed on bentonite particles, thus exhibiting excellent rheological and filtration behavior. In addition, E-AM/AMPS powder had a high specific surface area so that it can be dissolved in water faster, greatly reducing the time and difficulty of configuring drilling fluid.
研究领域:
化学工程
·
材料科学
✓ 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）