Geoenergy Science and Engineering
·
2024
·
IF 0
Yuhan Wu,Ming Duan,Qihai Wang,Bin Chen,Huaxin Chen,Xinliang Li,Shenwen Fang
Sand production in oil wells is a common challenge during the oil extraction process. Water-soluble polymers have attracted attention due to their low toxicity, cost-effectiveness, ease of direct injection, and excellent thermal stability. However, the dry polymer injection process commonly used in offshore oil fields is complex. Therefore, this paper employs acrylamide (AM), 2-acrylamide-2-methylpropane sulfonic acid (AMPS), a dihydroxy monomer (DOH), and a functional monomer (DAM) containing ketone groups and self-crosslinking properties as monomers. A polymer latex type sand control agent was prepared through dispersion polymerization for direct application on offshore platforms. This paper utilizes flocculation time and maximum sand free flow rate as inspection indicators and utilizes both the one-factor-at-a-time method and the surface response method to optimize the synthesis conditions of the sand control agent. The optimal synthesis conditions are obtained: total monomer concentration of 9.15 wt%, DOH concentration at 10 wt% of the total monomer concentration, ammonium sulfate (AS) concentration of 27.02 wt%, dispersant concentration of 2.13 wt%, initiator concentration at 0.25 wt% of the total monomer concentration, reaction time of 12 h, and reaction temperature of 40 °C. Under the conditions of concentration ≥2000 mg/L and curing time ≥4 h, the sand control agent is suitable for sand stabilization under formation conditions of temperatures between 50 and 80 °C, pH levels ranging from 3 to 9, salinity <30000 mg/L, and sand particle size of ≥100 μm. The research results of this paper can serve as a valuable reference for the control of oilfield sand production.
研究领域:
石油工程
·
高分子化学
✓ 已验证
产品关联
DOI
JOURNAL OF POLYMER ENGINEERING
·
2024
·Vol. 44
·期 9
·603-614
·
IF 1.7
Chengcheng Liu,Shibin Wang,Fei Jia,Bo Zheng,Shuaishuai Li,Yuheng Yang,Yang Gao,Jinzhou Zhao
A novel hydrophobic association copolymer (PAMA) was synthesized by incorporating acrylamide (AM), 2-acrylamide-2-methylpropanesulfonic acid (AMPS), cationic monomer (MEDDA), and methyl methacrylate (MMA). The properties of MMA copolymers with varying contents were analyzed using infrared spectroscopy, nuclear magnetic resonance spectroscopy, and scanning electron microscopy. Optimal overall performance of the solution was achieved when the MMA content reached 1.4 % w/w. Compared to pure PAAM (without MMA), the PAMA-1.4 % polymer exhibited superior viscoelasticity, temperature resistance, and shear resistance. This enhancement in PAMA performance can be attributed to the significant inhibition of intermolecular water film formation within the polymer matrix by MMA, effectively improving and regulating solution solubility while strengthening molecular chain interactions and enhancing the structural network strength of PAMA polymers. Additionally, the inclusion of MMA transformed rock surfaces from non-wetting to wetting conditions, thereby greatly improving oil displacement efficiency. In displacement experiments, PAMA-1.4 % performed better in terms of enhanced oil recovery, the recovery rate of 0.1 % w/w PAMA-2.4 % solution is only 7.78 %, while the recovery rate of 0.1 % w/w PAMA-1.4 % solution is 13.06 %.
研究领域:
石油工程
·
材料科学
✓ 已验证
DOI
高影响因子
WATER ENVIRONMENT RESEARCH
·
2025
·Vol. 97
·期 7
·e70121
·
IF 1.9
Zhi-Ke Wang,BaoFen Sun,Ting-Ting Li
In this study, an adsorbent capable of rapidly adsorbing heavy metal ions was prepared using PVA crosslinked with PF127DA and AA/AM. The swelling behavior of the hydrogel in salt solutions was investigated based on the Flory–Huggins theory model. The results indicated that the theoretical predictions of the hydrogel's volume swelling ratio, derived from the Flory–Rehner swelling theory and the Donnan equilibrium, were in agreement with the experimental swelling data of the hydrogel in water and salt solutions. With the increase in the amount of crosslinking agent PF127DA, the water absorption swelling ratio of the composite material was reduced by half, with the volume swelling ratio decreasing from 3.56 to 2.33. When the concentration of cations in the salt solution increased from 10 −5 mol/L to 10 −1 mol/L, the volume swelling ratio of the hydrogel showed a decreasing trend, which in turn affected the adsorption performance of the pollutant. Therefore, increasing the amount of crosslinking agent can enhance the colloidal strength, provided that its swelling properties are not compromised. Additionally, the presence of high concentrations of salt can affect the adsorption behavior of the hydrogel, and appropriate measures should be taken in practical applications to avoid its impact on adsorption behavior. Graphical The study prepared adsorbent, analyzed PF127DA's effect on hydrogel, and found it affects swelling and has high Pb adsorption capacity for heavy metal removal.
研究领域:
材料科学
·
环境科学
·
高分子化学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
·
2022
·Vol. 103
·期 2
·837-845
·
IF 4.125
Li Zhou,Yue Ma,Jiaxu Yao,Minghao Zhang,Haiyan Fu,Jian Yang,Jikai Liu,Minjie Zhao,Eric Marchioni
BACKGROUND Chrysanthemum is one of the most important and popular ornamentals over the world. Chrysanthemum drink is a type of traditional healthy drink like Chinese tea. Owing to the differences in the chemical compositions, different chrysanthemum varieties have different medicinal effects on human health. Thus, the identification of different chrysanthemum varieties is very important and necessary. This study aims to distinguish seven chrysanthemum varieties that are widely used in China. First, total lipids were obtained from chrysanthemums. After that, lipid profiles were characterized using ultra-high-performance liquid chromatography hyphenated with a Q Exactive™ high resolution–accurate-mass mass spectrometer. RESULTS A total of 163 lipid molecular species from 17 types of lipid classes in seven varieties of chrysanthemums were determined. Principal component analysis indicated that three lipid molecules, lysophosphatidylethanolamine(18:2) (LPE(18:2)), LPE(16:0), and phosphatidic acid(18:2/18:3) (variable importance in projection >3, P < 0.001), can be used as potential biomarkers to distinguish seven chrysanthemum varieties. Hierarchical cluster analysis showed that the lipid molecular profiles of ‘Gongju’ were most similar to ‘Jinzijianju’, followed by ‘Huaibaiju’, ‘Boju’, ‘Hangbaiju’, ‘Chuju’, and ‘Fubaiju’. CONCLUSION This comprehensive analysis provided a new method to identify chrysanthemum varieties through the perspective of lipidomics combined with chemometrics. © 2022 Society of Chemical Industry.
研究领域:
植物化学
·
代谢组学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 33
·22831-22837
·
IF 3.9
Bin Li,Wenrui Hao,Aolin Wu,Mengjing Zhou,Qinghua Yan,Heng Zhang,Lihua Su
The present study synthesized a deep eutectic solvent (DES) using acrylic acid (AA), acrylamide (AM), and choline chloride (ChCl), and added phytic acid (PA) as a filler. Subsequently, the PA/P(AA-co-AM) composite hydrogel was prepared under ultraviolet irradiation and used a photoinitiator. Characterization of the hydrogels was conducted using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The study aimed to investigate the impact of PA on the mechanical properties, fatigue resistance, and electrical conductivity of the composite hydrogel. The findings demonstrated that as the mass fraction of PA increased, the compressive strength of the composite hydrogel gradually decreased, yet the fatigue resistance of the composite hydrogel increased. Specifically, after 10 cycles of compression, the resilience recovery rate of FP0 dropped from 86.9% to 70.4%, the maximum stress recovery rate of FP1 dropped from 97.9% to 89.4%, the maximum stress recovery rate of FP2 dropped from 94.4% to 86.6%, and the maximum stress recovery rate of FP3 dropped from 97.3% to 93%. Overall, this study offers a straightforward and efficient method for producing composite hydrogels with both fatigue resistance and electrical conductivity.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 9
·5667-5673
·
IF 3.9
Bin Li,Haibo Qin,Ming Ma,Xiaojia Xu,Mengjing Zhou,Wenrui Hao,Zhigang Hu
In this paper, betaine (Bet) was used as a hydrogen bond acceptor (HBA), and acrylic acid (AA) and acrylamide (AM) were used as hydrogen bond donors (HBD) and mixed to form a deep eutectic solvent (DES). Different concentrations of β-cyclodextrin (β-CD) were dispersed in the DES, and a novel β-CD/P(AA-co-AM) hydrogel was prepared by frontal polymerization (FP). The characteristic structure and morphology of the hydrogels were analyzed using Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM), and the properties of the hydrogels were investigated. The results show that the mechanical properties of the hydrogel were improved by β-CD acting as a second cross-linking agent in the polymerization process, thus increasing the cross-link density of the hydrogel. Because the carboxyl groups contained in the acrylic acid dissociate under alkaline conditions, the composite hydrogel shows excellent pH responsiveness under alkaline conditions. Tetracycline hydrochloride was used as a drug model to test the drug loading and drug release performance of the hydrogels. With the increase of β-CD content, the loading capacity of the hydrogels for tetracycline hydrochloride gradually increased. The data of drug release indicated that the hydrogel has good drug delivery performance and has promising applications in drug delivery systems and other areas.
研究领域:
材料科学
·
药学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 136
·期 48
·48362
·
IF 2.188
Xianwu Jing,Youquan Liu,Wei Li,Yuan Xu,Zhiyu Huang
A water-miscible nonionic surfmer (AC-TX100) was synthesized based on Triton X-100 and acryloyl chloride. Then, a terpolymer P(AM/AA/AC-TX100) was synthesized by free radical polymerization in aqueous solution and intended to be used as drag reducing agent (DRA). The DRA was defined to be P(AM 87.32 /AA 12.46 /AC-TX100 0.22 ) according to 1 H NMR and elemental analysis, the molecular weight was 2.12 × 10 6 g/mol according to scattering method. DRA shows excellent performance in drag reduction (DR). The highest DR rate of 76% can be obtained when DRA concentration is 0.023% in fresh water; while in brine containing 3% NaCl, DR rate decreases, and it is necessary to increase the concentration to 0.05% to ensure that DR rate is higher than 70%. SEM and cryo-TEM show that DRA forms a network structure in aqueous solution, and the tightness of this structure has a direct influence on DR performance. Specifically, DRA molecules stretch into the whirlpools generated by water at high flow rates, reducing the quantity and intensity of whirlpools, thereby lowering the energy loss and the friction. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 48362.
研究领域:
高分子化学
·
流体力学
✓ 已验证
DOI
高影响因子
AMERICAN MINERALOGIST
·
2020
·Vol. 105
·期 11
·1686-1694
·
IF 2.924
Huan Chen,Hao Cui,Richen Zhong,Yuling Xie,Chang Yu,Zimeng Li,Yifan Ling
Sulfate is traditionally considered to have retrograde solubility in aqueous solutions. However, our recent hydrothermal diamond-anvil cell (HDAC) experiments have shown that the solubility of Na 2 SO 4 changes from retrograde to prograde in the presence of silica, leading to the formation of sulfate-rich solutions at high temperatures, in line with observations on natural geofluids. In this study, we use synthetic inclusions of fused silica capillary capsules containing saturated Na 2 SO 4 solutions and Na 2 SO 4 crystals to quantitatively investigate the solubility of Na 2 SO 4 at different temperatures in the Na 2 SO 4 -SiO 2 -H 2 O system. Sulfate concentrations were measured using Raman spectroscopy and calibrated using Cs 2 SO 4 solutions with known concentrations. The solubility of crystalline Na 2 SO 4 dropped slightly when heated from 50 to 225 °C and dramatically from 225 to 313 °C. At 313 °C, the Na 2 SO 4 crystals began to melt, forming immiscible sulfate melt coexisting with the aqueous solution, with or without solid Na 2 SO 4 . With the formation of sulfate melt, the solubility of Na 2 SO 4 was reversed to prograde (i.e., solubility increased considerably with increasing temperatures). The solubility of Na 2 SO 4 in the measured solution was significantly higher than that predicted in the absence of SiO 2 over the entire temperature range (except for temperatures around 313 °C). This indicates that the presence of SiO 2 greatly changes the dissolution behavior of Na 2 SO 4 , which may be caused by the formation of a sulfate–silicate intermediates such as Si ( OH ) 4 SO 4 2 − . Considering that most crustal fluids are silica-saturated, the solubility curve of Na 2 SO 4 obtained in this study can better reflect the characteristics of geofluids when compared to that of Na 2 SO 4 -H 2 O binary system. At temperatures of 313–425 °C, the solubility of Na 2 SO 4 increases with temperature following the function C sulfate = –3173.7/ T + 5.9301, where C sulfate and T represent the solubility of Na 2 SO 4 in mol/kg H 2 O and temperature in Kelvin, respectively. As an application, this temperature-solubility relationship can be used to evaluate the sulfate contents in fluid inclusions that contain sulfate daughter minerals, based on the temperature of sulfate disappearance obtained from microthermometric analysis. The sulfate concentrations of the ore-forming fluids of the giant Maoniuping carbonatite-related rare earth element (REE) deposit (southwest China) were calculated to be 4.67–4.81 m (mol/kg H 2 O). These sulfate concentrations were then used as internal standards to calibrate the previously reported semi-quantitative results of laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) analysis of REE-forming stage fluid inclusions at this deposit. The calculated Ce concentrations in the REE-mineralizing fluid range from 0.42 to 0.49 wt%. The high fluid REE contents suggest that the sulfate-rich fluids are ideal solvents for REE transport. A mass-balance calculation was carried out to evaluate the minimal volume of carbonatite melt that was required for the formation of the giant Maoniuping REE deposit. The result indicates that the carbonatite dikes in the mining area are enough to provide the required fluids and metals, and thus a deep-seated magma chamber is not necessary for ore formation.
研究领域:
地球化学
·
矿物学
·
矿床地质
·
热水系统
✓ 已验证
DOI
高影响因子
AMERICAN MINERALOGIST
·
2023
·Vol. 108
·期 7
·1357-1367
·
IF 3.1
Qi Tao,Chaogang Xing,Seungyeol Lee,Long Yang,Qingjin Zeng,Shangying Li,Tianqi Zhang,Guanglie Lv,Hongping He,Sridhar Komarneni
An aluminum-free zinc-bearing smectite (Zn-smectite) was synthesized under hydrothermal conditions, together with its magnesium substituted products. Its layer charge calculated by cation exchange capacity (CEC) is 117.4 mmol/100 g. Powder X-ray diffraction (XRD) revealed turbostratic stacking and showed that the d 06l value of the Zn-smectite was >1.525 Å, indicating that it is trioctahedral. Its d 001 value increased from ca.12.8 Å to ca. 16.0 Å after ethylene glycol (EG) saturation. The Zn-smectite did not irreversibly collapse after heating the Li + -saturated sample to 300 °C, suggesting that its layer charge was generated from octahedral-site vacancies (defects). The Zn-smectite resembles zincsilitelike minerals with interlayer Na + and Zn 2+ . The intralayer structure of zincsilite was confirmed by pair distribution function (PDF) analysis, and the whole crystal structure was built and optimized by DFT calculation in the CASTEP module of the Materials Studio software. Synthetic zincsilite is triclinic, space group P 1, and its optimized unit-cell parameters are: a = 5.294 Å, b = 9.162 Å, c = 12.800 Å, α = 90.788°, β = 98.345°, and γ = 90.399°.
研究领域:
矿物学
·
材料科学
✓ 已验证
DOI
高影响因子
Processes
·
2025
·Vol. 13
·期 3
·922
·
IF 2.8
Xu Chen,Xiangpeng Zhu,Cheng Gan,Yigang Li,Diren Liu
The stability of cement slurries under high-temperature conditions poses a significant engineering challenge in cementing operations. This study explored the development of a novel tetrameric thermosensitive thickening polymer (TTSTC) as a solution to this problem. Aqueous free radical polymerization was employed to synthesize the polymer. The base monomers 2-acrylamido-2-methylpropanesulfonic acid (AMPS) and acrylamide (AM) were employed, in conjunction with the long-chain thermosensitive monomers octadecyldimethylallylammonium chloride (C18DMAAC) and N-vinylpyrrolidone (NVP). The optimal synthesis conditions were determined by orthogonal experiments as follows: monomer molar ratio (AM:AMPS:C18DMAAC:NVP) = 15:10:5:5, initiator concentration of 16 wt%, cross-linker concentration of 0.45 wt%, pH 6, and polymerization temperature of 60 °C. The chemical structure of TTSTC was characterized by Fourier transform infrared spectroscopy (FT-IR), proton nuclear magnetic resonance (1H-NMR), gel permeation chromatography, scanning electron microscopy, Zeta potential, and particle size measurement. The results verified the successful synthesis of the target polymer. Its thermal stability, thermosensitive thickening behavior, and salinity resistance were systematically investigated. Furthermore, the impact of TTSTC on the settling stability, rheological characteristics, and compressive strength of cement paste was assessed. The experimental findings demonstrated that TTSTC displayed noteworthy thermosensitive thickening properties at temperatures up to 279 °C, pH values ranging from 11 to 13, and NaCl/CaCl2concentrations between 0.05 and 0.5 g/L. The optimal performance of TTSTC was observed at mass fractions ranging from 0.6 to 0.8 wt%. When incorporated into the slurry at 0.6–1.0 wt%, TTSTC significantly improved the slurry settling stability, thickening properties, and 28d compressive strength at elevated temperatures compared with the control. When comparing the temperature-sensitive thickening performance of the newly developed treatment agent with that of the commercially available xanthan gum thickener, the results showed that for the cement slurry system containing the new treatment agent at a mass fraction of 0.6%, the reduction in consistency was 30.9% less than that of the cement slurry system with xanthan gum at a mass fraction of 0.6%. These findings indicate that TTSTC has the potential to function as a highly effective additive in cementing operations conducted in extreme environments, thereby enhancing the stability and dependability of such operations.
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 ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Ajiao Liu,Zhe Tang,Lexing Liang,Yucheng Ye,Shiwei Deng,Haifeng Yuan,Jianqi Qi,Tiecheng Lu
Via a powder pretreatment process, transparent La 0.4 Gd 1.6 Zr 2 O 7 ceramics were successfully fabricated through the aqueous AM (acrylamide) gel-casting technique. Our research shows that the water absorption of La 2 O 3 has significant influence on the viscosity of slurry, leading to low density of the green body and poor transparency of ceramic. By pretreating the mixed powder via a solid-state reaction, the viscosity and pH results have shown that the single-phase pretreated powder has a positive improvement on the gel-casting process. Compared with the mixed powder, the pretreating method has effectively improved the slurry with higher solid content and lower viscosity. Therefore, the pretreated powder combined with gel-casting method have a positive influence on the density of green body and the optical quality of obtained La 0.4 Gd 1.6 Zr 2 O 7 ceramics. The polished ceramics with 40 mm in diameter (Ø = 40 mm) and 1.5 mm in thickness (δ = 1.5 mm) exhibited the in-line transmittance of 78% at 1100 nm and a maximum transmittance of about 80% in the infrared region, as well as a wide range of high stable transmittance among 0.6–6.0 µm wavelength. Our work opens a way for highly transparent ceramic preparation by aqueous AM gelling system with hygroscopic rare earth oxide as raw materials.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2019
·
IF 5.108
Shisheng Zhang,Tao Lin,Wei Chen,Hang Xu,Hui Tao
The residues of pharmaceuticals and personal care products (PPCPs) in environmental waters have been widespread concerned. Metronidazole (MNZ), normally employed to treat inflammation and infection, was chosen as one model PPCP. The degradation of MNZ by chlorination could be fitted by pseudo-first-order kinetics as the observed pseudo-first-order rate constants increasing from 0.0302 min −1 to 0.2872 min −1 . However, the kinetics during chloramination of MNZ followed pseudo-second-order reaction, whose estimated half-live was approximately 6–8 times longer than chlorination. The chlor(am)ination of MNZ especially formed chloroform (CF), dicholoacetamide (DCAcAm), tricholoacetamide (TCAcAm) and dichloroacetonitrile (DCAN), and their yields were overall lower under chloramination than chlorination. During chlorination, the yield of CF was increased from 0.35 ± 0.02% to 2.06 ± 0.12% with 1–20 chlorine/MNZ molar ratio, whereas the formations of DCAcAm, TCAcAm and DCAN increased firstly and then decreased. Increasing chloramine dosage promoted the concentrations of scheduled disinfection byproducts (DBPs). CF and TCAcAm kept continuous generation in chlor(am)ination versus reaction time. Compared with the chlorination, the chloramination of MNZ was more dependent on pH value due to the self-degradation of chloramine. Faintly acidic condition favored N-DBPs' formation in MNZ when it was subjected to chlor(am)ination. The chloramination of MNZ produced cytotoxicity and genotoxicity by 10–15 folds lower than chlorination, and DCAN formed during chloramination dominated both DBPs' yields and toxicity contribution. Opposite to chlorination, the integrated toxicity of MNZ during chloramination varied linearly versus N-DBPs' yields.
研究领域:
环境科学
·
毒理学
✓ 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）