Journal of Oleo Science
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2025
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IF 1.8
Guangqun Cao,Guofang Gao,Penghui Liang,Junxia Wang,Yilei Ruan,Zhiyong Hu,Hailin Zhu
Surface activity parameters such as critical micelle concentration (CMC), saturation adsorption (Гmax), and limiting molecular area (Amin) of three triazinyl bisquaternary ammonium salts with different hydrophobic chain lengths (C6-2-C6, C8-2-C8 and C12-2-C12) were analyzed from surface tension tests. The results showed that the CMC value of C12-2-C12 was much lower (0.026 mmol/L) than that of C6-2-C6 and C8-2-C8. The corrosion inhibition performances of three triazinyl bisquaternary ammonium salts on Q235 in 1 mol/L HCl solution were investigated by weight loss measurements and electrochemistry measurements. The results showed that the longer the hydrophobic chain length, the better the corrosion inhibition performance at the same concentration. The corrosion inhibition efficiencies of C12-2-C12, C8-2-C8 and C6-2-C6 at 0.2 mmol/L were 98.10%, 96.09% and 94.64%, respectively. Surface analysis and quantum chemical calculations showed that the three triazinyl bisquaternary ammonium salts can be adsorbed on the surface of carbon steel effectively to inhibit the corrosion of the carbon steel surface.
研究领域:
材料科学
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表面化学
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腐蚀与防护
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2019
·
IF 4.784
Qiong Xiao,Guo Chen,Anfeng Xiao
Two types of fatty acid derivatives were used to synthesize agarose fatty acid esters in a heterogeneous medium. Agarose esters with low degree of substitution were synthesized with succinic anhydride, octenyl succinic anhydride, dodecyl succinic anhydride as esterifying agents. Agarose esters with high degree of substitution were synthesized with lauroyl chloride, palmitoyl chloride, and stearoyl chloride as esterifying agents. Scanning electron microscopy revealed that agarose anhydride modification mostly occurred at the surface of the particles, whereas chloride modification occurred at both the surface and interior of the particles. Fourier transform infrared spectroscopy and nuclear magnetic resonance analyses indicated that hydrophobic groups were successfully introduced in agarose, and the hydroxyl group in the C-2 of D-galactose was the preferred location for esterification . The results also showed that agarose esters with long-chain fatty acids and high substitution degree showed higher emulsifying ability and low interfacial tension property than derivatives with short-chain fatty acids and low substitution degree. Compared with commonly used food emulsifiers, such as Tween, sucrose fatty acid ester, and glycerin monostearate, agarose esters were slightly deficient in emulsifying ability but presented high emulsion stability in oil-in-water emulsion.
研究领域:
食品科学
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材料化学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 15
·9077-9086
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IF 4.036
Quan Hongping,Zhen Xuele,Lu Qiangying,Wang Linyuan,Jiang Silong
Acidizing retarders are used to reduce the reaction rate between hydrochloric acid (HCl) and carbonates to increase the efficiency of acidification of oil and gas wells and increase oil and gas recovery. We synthesized two polymeric acidizing retarders (AR-1 and AR-2) to explore ways to improve the efficiency of this process. Retarder AR-1 is based on acrylamide (AM) and allyl polyethylene glycol (APEG-1000), and retarder AR-2 is composed of AM, APEG-1000, and octadecyl dimethyl allyl ammonium chloride (C-18). The molecular structures of AR-1 and AR-2 were characterized by Fourier transform infrared (FT-IR) and 1H nuclear magnetic resonance (1H-NMR). The retarding performance and acid–rock reaction rates of AR-1 and AR-2 were evaluated, and the experimental results indicated that AR-2 had a better retarding performance than AR-1, and the acid–rock reaction rate of AR-1 was higher than AR-2. This could be because AR-2 with its hydrophobic chains forms a thicker adsorbed film. This was confirmed by X-ray photoelectron spectroscopy (XPS) and adsorption behavior studies. The scanning electron microscope (SEM) images, contact angle, and XPS results showed that both retarders form adsorption films on the surface of rocks, indicating that the introduction of AM and APEG-1000 makes the retarder adsorb on rock surfaces. The introduction of hydrophobic chains for AR-2 enhanced the thickness of adsorbed film, indicating that adding hydrophobic chains to the acidizing retarder significantly improves its retarding performance.
研究领域:
石油工程
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化学工程
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DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2024
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IF 5.3
Jie Ma,Tao Wang,Wei Hou,Zhenhua Wu,Suling Bao,Dan Wu,Wentao Ma,Yu Zhang
The extraction of crude oil generates a significant volume of stable emulsions that can lead to various adverse effects in industrial extraction processes. Therefore, emulsion demulsification is a crucial step. In this paper, PGDA, a low-temperature W/O demulsifier with double hydrophobic chains, was synthesized from poly(ethylene glycol) diacrylate by a simple low-temperature process. The structure of PGDA was analyzed by FTIR and 1 H NMR, and the demulsification performance was evaluated by a bottle-testing method. The results demonstrated that PGDA, at a concentration of 500 mg/L, achieved a demulsification efficiency of 100 % under low-temperature conditions (45 °C) over a 5-hour period. Furthermore, it also showed good demulsifying performance in wide pH range (6–10) and high salinity (100,000 mg/L). In addition, the possible mechanism of demulsification of PGDA was investigated by zeta potential, interfacial tension, and three-phase contact angle, etc. PGDA showed strong competitive adsorption ability with asphaltenes at the interface. PGDA has the ability to navigate rapidly to the oil–water boundary and displace the native surfactants there, thus destabilizing the emulsion and thus promoting the separation of oil and water. PGDA by virtue of the simple synthesis process, low demulsification temperature and high efficiency are of practical application.
研究领域:
化学工程
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石油工程
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产品关联
DOI
高影响因子
Materials Today Communications
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2024
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IF 3.7
Yuchao Niu,Jiannan Li,Weiming Yu,Wanting Chen,Xuemei Wu,Gaohong He,Miao Yu,Tiantian Li
A flexible hydrophilic chain segment with ether bonds and a long hydrophobic tail chain with multiple carbon atoms are designed and grafted on the same side of the polymer backbone, which can not only improve the alkaline stability by preventing the benzyl carbon from being attacked by OH - , but also reduce the hydration degree of the membrane, giving it excellent conductivity, alkaline stability and low swelling ratio. These results show that the prepared anion exchange membranes (AEMs) with a hydrophilic chain segment containing 2 ether bonds exhibits the best overall performance. Its ionic conductivity can reach 90.4 mS cm −1 at 80 °C, the swelling ratio is less than 8%, the tensile strength can reach 14.5 MPa, and the elongation at break is 79.0%. Even after being soaked under alkaline conditions for 672 h, the conductivity of the original membrane still remains over 85%. The peak power density of the fuel cell using this AEM can reach as high as 582 mW cm −2 . The segmented hydrophilic and hydrophobic side chain proposed in this work provides a novel idea to design the AEM materials and improve the performance of anion exchange membrane fuel cell.
研究领域:
材料科学
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燃料电池工程
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DOI
高影响因子
Petroleum Science
·
2024
·
IF 6
Ya-Xing Dai,Xian-Li Zhang,Si-Yuan Liu,Feng-Run-Ze Zhang,Yi-Xi Zhang,Yu-Tong Sang,Jing-Xi Zheng,Zhao-Sheng Liu,Peng Zhang
Two allyldimethylalkyl quaternary ammonium salt (AQAS) monomers, N , N -dimethylallylphenylpropylammonium bromide (AQAS1) and N , N -dimethylallylnonylammonium bromide (AQAS2), were synthesized and used to prepare modified polyacrylamide materials. Two new drag reducers were synthesized from acrylamide (AM), sodium acrylate (NaAA) and a cationic modified monomer (AQAS1 or AQAS2) via aqueous solution polymerization, and the copolymers were named P(AM/NaAA/AQAS1) and P(AM/NaAA/AQAS2), respectively. The structures of the drag reduction agents were confirmed by IR and 1 H NMR spectroscopies. The molecular weight ( M w ) of P(AM/NaAA/AQAS1) was 1.79 × 10 6 g/mol. When the copolymer concentration was 1000 mg/L and the flow rate was 45 L/min, in fresh water the highest drag reduction rate was 75.8%, in 10,000 mg/L NaCl solution the drag reduction rate decreased to 72.9%. The molecular weight of P(AM/NaAA/AQAS2) was 3.17 × 10 6 g/mol. When the copolymer concentration was 500 mg/L and the flow rate was 45 L/min, the drag reduction rate reached 75.2%, and in 10,000 mg/L NaCl solution the drag reduction rate was 73.3%, decreased by approximately 1.9%. The drag reduction rate for partially hydrolyzed polyacrylamide (HPAM) was also investigated, and the results showed that the drag reduction rates for 500 and 1000 mg/L HPAM solutions were merely 43.2% and 49.0% in brine, respectively. Compared with HPAM, both of the above copolymers presented better drag reduction capacities.
研究领域:
材料科学
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石油工程
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产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 65
·60138-60144
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IF 3.289
Shaoyu Chen,Chaoxia Wang,Yunjie Yin,Kunlin Chen
To obtain an aqueous foam photo-switch, azobenzene molecules [4-hydroxy-4′-oxoalkyl azobenzene (HCnAzo) n = 4, 8, and 12] were synthesized. The hydrophobic chain length affected both photo-responsive properties and foam stability controllability. trans → cis isomerization of HCnAzo occurred by exposing to UV light for 1 s and the cis → trans process for HC4Azo, HC8Azo and HC12Azo was carried out by visible light irradiation for 12 min, 13 min and 14 min, respectively. The reversible isomerization was repeatable, maintaining high sensitivity. Due to the small steric effect and isomerization barrier, photo-isomerization of HC4Azo was more rapid than HC8Azo and HC12Azo. With the increase of the hydrophobic chain length, the decrease of thermal isomerization barrier resulted in less cis isomer and more trans isomer in photo-stationary state via UV and visible light irradiation, respectively. The combination of visible light and heat can accelerate the cis → trans isomerization speed. trans HC4Azo, HC8Azo and HC12Azo increased foam life from 6.67 min to 10.38, 9.91 and 7.74 min, respectively, resulting from the absorption on the air–water interface and a high affinity. cis HC4Azo, HC8Azo and HC12Azo decreased foam life from 6.67 min to 5.12, 5.49 and 6.02 min, respectively, attributed to the interfacial desorption and increase of surface tension. HC4Azo with sensitive photo-isomerization and effective foam stability controllability was the best choice for an aqueous foam photo-switch.
研究领域:
材料科学
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化学
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产品关联
DOI
高影响因子
FARADAY DISCUSSIONS
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2025
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IF 3.1
Sangshuang Li,Huayang Liu,Yu Fang,Yaoting Li,Laicheng Zhou,Dinghao Chen,Juan Liang,Huaimin Wang
Molecular self-assembly enables the formation of intricate networks through non-covalent interactions, serving as a key strategy for constructing structures ranging from molecules to macroscopic forms. While zero-dimensional and one-dimensional nanostructures have been widely achieved, two-dimensional nanostrip structures present unique advantages in biomedical and other applications due to their high surface area and potential for functionalization. However, their efficient design and precise regulation remain challenging. This study systematically explores how different hydrophobic amino acid linkers impact the microscopic morphology in two-component co-assembly systems with strong electrostatic interactions. The introduction of the AA linker resulted in distinctive 2D nanostrips, which stacked to form bilayer sheets, whereas VV, LL, and NleNle linkers formed one-dimensional fibers. In contrast, GG and PP linkers did not produce stable aggregates. Our findings highlight the role of intermolecular interactions in the development of 2D assemblies, providing new insights into the design and application of 2D materials.
研究领域:
生物化学
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材料科学
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纳米技术
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DOI
PubMed
高影响因子
ACS Applied Bio Materials
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2024
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IF 4.6
Yujun Zhang,Peiling Zhang,Yan Lv,Jing Liu,Yiyu Zhou,Zibin Zhang,Jianying Huang
The increasing number of infections caused by pathogenic bacteria has severely affected human society. More and more deaths were originated from Gram-positive methicillin-resistant Staphylococcus aureus (MRSA) infection each year. The potential and excellent bacteriostatic activity and resistance to biofilm formation of pillar[5]arene with different functional groups attract important attention to further study the relationship between antimicrobial activity and cytotoxicity by varying the length of the hydrophobic chain, the number of positive charges, and the hydrophobic/hydrophilic balance of the molecule. In this work, four pyridinium-based cationic pillar[5]arene (PPs) with linear aliphatic chains of different lengths were synthesized. After systematic characterization, their inhibition activities against S. aureus were investigated. It revealed that PP6 (six methylenes in each linker) exhibited excellent inhibition activity against S. aureus (ATCC 6538) with a minimum inhibitory concentration (MIC) of 3.91 μg/mL and a minimum bactericidal concentration (MBC) of 62.50 μg/mL. As expected, PP6 exhibited the strongest antibiofilm ability and negligible antimicrobial resistance even after the 20th passage. A study of the action mechanism of selected PPs on the bacterial membrane depolarization and permeability by transmission electron microscopy (TEM) disclosed that the cationic pyridine groups of PPs inserted into the negatively charged bacterial membranes, thereby leading to membranolysis, cytoplasmic content leakage, and cell death. Importantly, PPs all showed very low toxicity to mammalian cells (L929 and HBZY-1), which provided a significant reference for the construction of hypotoxic antibacterial biomaterials for multiple drug-resistant bacteria based on pyridinium-grafted cationic macrocycles with controllable hydrophobic chain lengths.
研究领域:
微生物学
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药物化学
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材料科学
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DOI
PubMed
高影响因子
Soft Matter
·
2017
·Vol. 13
·期 18
·3352-3358
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IF 3.889
Xiuyan Ren,Chang Huang,Lijie Duan,Baijun Liu,Lvjun Bu,Shuang Guan,Jiliang Hou,Huixuan Zhang,Guanghui Gao
Toughness, strechability and compressibility for hydrogels were ordinarily balanced for their use as mechanically responsive materials. For example, macromolecular microsphere composite hydrogels with chemical crosslinking exhibited excellent compression strength and strechability, but poor tensile stress. Here, a novel strategy for the preparation of a super-tough, ultra-stretchable and strongly compressive hydrogel was proposed by introducing core–shell latex particles (LPs) as crosslinking centers for inducing efficient aggregation of hydrophobic chains. The core–shell LPs always maintained a spherical shape due to the presence of a hard core even by an external force and the soft shell could interact with hydrophobic chains due to hydrophobic interactions. As a result, the hydrogels reinforced by core–shell LPs exhibited not only a high tensile strength of 1.8 MPa and dramatic elongation of over 20 times, but also an excellent compressive performance of 13.5 MPa at a strain of 90%. The Mullins effect was verified for the validity of core–shell LP-reinforced hydrogels by inducing aggregation of hydrophobic chains. The novel strategy strives to provide a better avenue for designing and developing a new generation of hydrophobic association tough hydrogels with excellent mechanical properties.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Xuening Feng,Huanyu Liu,Hanjun Liu,Xuebin Jiang,Liwei Shen,Yuqi Tang,Qian Qu,Dong Xiang,Xuemin Yan,Yuanzhu Mi
A new type of ionic liquid demulsifier with double hydrophilic and hydrophobic chains (HDEA-TFA) was synthesized through the quaternization and replacement reaction. The chemical structure of HDEA-TFA was identified by 1 H NMR and FT-IR. It could be applied as an excellent demulsifier for two water-in-crude oil (W/O) emulsions (m water :m oil = 70:30 and m water :m oil = 30:70). The effect of demulsification conditions such as concentration of HDEA-TFA, settling time, demulsification temperature, pH value and salinity on the demulsifying efficiency (DE) of the W/O emulsions were discussed in detail. The results showed that the demulsifying efficiency (DE) of HDEA-TFA in the two W/O emulsions could reach 100 % with the concentration of 500 mg/L at 60 °C within 120 min. Also, HDEA-TFA had excellent acidic, alkaline and salt resistance. Moreover, several commercial demulsifiers were compared to evaluate the demulsifying performance of HDEA-TFA. The dynamic interfacial tension (IFT), surface tension (ST), three-phase contact angle (CA), elasticity modulus (EM) and zeta potential were used to investigate the demulsifying mechanism. The current study developed a new type of ionic liquid demulsifier with excellent performance and provided a reference for the research of demulsification mechanism.
研究领域:
化学工程
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石油工程
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 54
·期 23
·14309-14319
·
IF 3.442
Zhou Zekun,Shao Yun,Gao Xiang,Liu Zhitian,Zhang Qi
Nanostructures of polypyrrole with controlled uniform morphologies have been synthesized using assembled surfactant aggregates as templates. The effects of hydrophobic chain length of surfactant on particle size and electrochemical performance of polypyrrole nanospheres are systematically studied. The particle size and morphology of the nanospheres are observed by scanning electron microscope and transmission electron microscope, and at the same time, the nitrogen adsorption and desorption test of polypyrrole spheres are carried out. The results show that changing the length of hydrophobic chain of surfactant is not only an effective control of particle size and morphology, but also a significant improvement on the pore structure. With the increase in alkyl chain length, the particle size decreases, and the specific surface area and pore volume increase. The polypyrrole nanosphere prepared by long hydrophobic chain surfactant shows small impedance and high electrochemical capacity about 232 F g −1 at 1.0 A g −1 , and the results suggest that we can fabricate high specific surface area polypyrrole nanosphere which has excellent electrochemical performance by the regulation of hydrophobic chain length. Our work provides a novel synthetic strategy for the fabrication of nanospheres for the construction of high-performance supercapacitors by optimizing the hydrophobic chain length.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）