JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 33
·e55847
·
IF 2.7
Chao Zhang,Erlei Yu,Heyun Wang,Dong Huang,Guojun Ding,Zhonghua Zhao,Zhong Wei
In response to the health and environmental concerns associated with the plasticizer dioctyl phthalate (DOP), this research explores the utilization of methyl oleate (MO) derived from plant oil, 1,2,4-Benzeneticarboxylic anhydride (TMA) and isobutyric anhydride (IA) as a precursor for synthesizing a hyperbranched polyester named IA-MO-TMA. This polyester serves as an alternative plasticizer for Polyvinyl chloride (PVC). The chemical structure of IA-MO-TMA was thoroughly characterized using Fourier Transform Infrared Spectrometer (FTIR) and nuclear magnetic resonance hydrogen spectra, and its molecular weight was assessed. The PVC film, plasticized with IA-MO-TMA, underwent comprehensive testing using techniques such as differential scanning calorimetry, scanning electron microscopy, and thermogravimetric analysis. Notably, the glass transition temperature ( T g ) of the plasticized PVC film exhibited a significant reduction from 75°C to −6.7°C. The plasticized film demonstrated an elongation at break of 318.1%, a tensile strength of 19.2 MPa, and a plasticizing efficiency of 109.9%. Moreover, the use of IA-MO-TMA as a plasticizer increased the initial decomposition temperature of PVC film from 235.6 to 264.1°C. Additionally, the extraction rate of IA-MO-TMA in petroleum ether was found to be 35.6% lower than that of DOP.
研究领域:
材料科学
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高分子化学
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环境科学
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DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Li Li,Chao Song,Xiang Chen,Jingji Li,Lei Fan,Jie Han,Rong Guo
Lamellar liquid crystals (LLCs) exhibit significant potential in lubrication due to their unique layered structure. Introducing ionic liquids (ILs) to enhance the lubrication performance of the LLCs is a feasible approach. However, common ILs often demonstrate substantial corrosivity toward metals. In this study, LLCs were formed using oleic acid (OA) as the anion, alcoholamine solvents with corrosion-resistant properties (including monoethanolamine (MEA), diethanolamine (DEA), and triethanolamine (TEA)) as the cation, and glycerol (GL) as the solvent. The results reveal that the synergistic effect between the physical adsorption film and the tribochemical reaction film during friction significantly improves their lubricating performance. Notably, the OA/GL/MEA system outperforms OA/GL/DEA and OA/GL/TEA in lubrication properties, which can be attributed to its tighter intermolecular arrangement and smaller interlayer spacing, thereby providing enhanced mechanical strength. Furthermore, the ionic liquid-based LLCs exhibit negligible corrosiveness to steel, owing to the presence of carboxylic acid groups, unsaturated bonds, and hydroxyl groups in the molecular structure, which strengthen ILs adsorption on metal surfaces. Their combined lubrication efficacy and corrosion resistance render these LLCs highly promising for mechanical lubrication applications.
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DOI
PubMed
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Bin Wang,Kai Gao,Kai Wang,Yujie Wang,Qiuying Chang,He Yang
The tribological behavior of carboxylic acids, especially oleic acid, in boundary lubrication conditions is a subject of interest. This study presents the results of four-ball tribological tests conducted under varying contact pressures and sliding speeds. The findings reveal a critical turning speed within a confined zone, which causes a significant change in the frictional performances of oleic acid, leading to the formation of an ultralow wear tribofilm. This tribofilm, predominantly composed of oxyhydrogen compounds and hydrocarbons with more than five carbon atoms, is generated by the molecular action of oleic acid. Reactive nonequilibrium molecular dynamics simulations demonstrate that the shear speed-dependent decomposition modes of oleic acid and the transformation of the lubrication slip interface are the fundamental processes underlying the formation of this ultralow-wear boundary tribofilm.
研究领域:
材料科学
·
化学工程
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DOI
PubMed
高影响因子
ENERGY & FUELS
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2020
·
IF 3.421
Yulong Yang,Tingting Cheng,Hairong Wu,Zhenjiang You,Dansen Shang,Jirui Hou
Oleic acid-modified titania (OA-TiO2) nanoparticles are synthesized for the application of enhanced oil recovery (EOR) in low-permeability reservoirs. The oleic acid is grafted onto the surface of titania by the esterification reaction under a specific condition. The well-dispersed OA-TiO2 is expected to exhibit an excellent interfacial activity and a strong wettability alteration capability, owing to its amphiphilic features. This work aims to explore the potential of employing OA-TiO2 in EOR and to unveil its mechanisms of displacing oil in porous media. The interfacial properties of OA-TiO2 are systematically investigated by determining its interfacial tension and contact angle. A microfluidic test on a 2.5-D microfluidic model and a series of core floods are carried out to study the oil-displacement efficiency of OA-TiO2 nanofluids. The experimental results demonstrate that oleic acid-modified titania nanoparticles show great potential in not only reducing the injection pressure but also enhancing hydrocarbon recovery in low-permeability reservoirs.
研究领域:
石油工程
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材料科学
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表面化学
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2018
·
IF 3.141
Zihao Zhang,Zhe Chen,Xin Gou,Hao Chen,Kequan Chen,Xiuyang Lu,Pingkai Ouyang,Jie Fu
Ni/AC (nickel on active carbon) catalysts with different Ni loadings were synthesized and studied for the decarboxylation and aromatization of oleic acid in the absence of H2 or hydrogen donors. Without the use of hydrogen source, the whole deoxygenation process became more economical. Moreover, oleic acid can be saturated using the H2 derived from the production of aromatics, which were also considered as the critical component in aviation biofuels. The structure and properties of the catalysts were investigated using X-ray diffraction, transmission electron microscopy, and temperature-programmed desorption of CH3COOH and CO. The experimental and characterization results revealed that 30% Ni/AC had a higher adsorption capacity of CH3COOH among the other Ni/AC catalysts and highly dispersed and small Ni particles, providing a heptadecane yield of 40.7%. It also contained 13.8% aromatics, which fulfills the requirement of aviation fuels. This Ni/AC catalyst showed good stability even after being reused thrice.
研究领域:
催化化学
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可再生能源
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材料科学
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产品关联
DOI
高影响因子
Nutrition & Metabolism
·
2020
·Vol. 17
·期 1
·1-14
·
IF 3.211
Zeng Xin,Zhu Min,Liu Xiaohong,Chen Xuanmin,Yuan Yujia,Li Lan,Liu Jingping,Lu Yanrong,Cheng Jingqiu,Chen Younan
Background Pyroptosis is a novel programmed cell death. It is identified as caspase-1 dependent and characterized by plasma-membrane rupture and release of proinflammatory intracellular contents inculuding IL-1 beta and IL-18. Pyroptosis is distinct from other forms of cell death, especially apoptosis that is characterized by nuclear and cytoplasmic condensation and is elicited via activation of a caspase cascade. In pyroptosis, gasdermin D (GSDMD) acts as a major executor, while NLRP3 related inflammasome is closely linked to caspase-1 activation. Given that pyroptosis has played a critical role in the progression of non-alcoholic steatohepatitis (NASH), here, we investigated whether the regulation of pyroptosis activation is responsible for the protective role of monounsaturated oleic acids in the context of hepatocellular lipotoxicity.Methods Human hepatoma cell line HepG2 cells were exposed to palmitic acid (PA) with or without oleic acids (OA) or/and endoplasmic reticulum (ER) stress inhibitor tauroursodeoxycholic acid (TUDCA) for 24 h. Besides, the cells were treated with the chemical ER stressor tunicamycin (TM) with or without OA for 24 h as well. The expressions of pyroptosis and ER stress related genes or proteins were determined by real-time PCR, Western blot or immunofluorescence. The morphology of pyroptosis was detected by acridine orange and ethidium bromide (AO/EB) staining. The release of IL-1 beta and tumor necrosis factor alpha (TNF-α) was determined by ELISA. Sprague–Dawley (SD) rats were fed with high fat diet (HFD) for 16 w, then, HFD was half replaced by olive oil to observe the protective effects of olive oil. The blood chemistry were analyzed, and the liver histology and the expressions of related genes and proteins were determined in the liver tissues.Results We demonstrated that PA impaired the cell viability and disturbed the lipid metabolism of HepG2 cells (P < 0.01), but OA robustly rescued cells from cell death (P < 0.001). More importantly, we found that instead of cell apoptosis, PA induced significant pyroptosis, evidenced by remarkably increased mRNA and protein expressions of inflammasome marker NLRP3, Caspase-1 and IL-1beta, as well as cell membrane perforation driving protein GSDMD (P < 0.05). Furthermore, we demonstrated that the PA stimulated ER stress was causally related to pyroptosis. The enhanced expressions of ER stress markers CHOP and BIP were found subcellular co-located to pyroptosis markers NLRP3 and ASC. Additionally,TM was able to induce pyroptosis like PA did, and ER stress inhibitor TUDCA was able to inhibit both PA and TM induced ER stress as well as pyroptosis. Furthermore, we demonstrated that OA substantially alleviated either PA or TM induced ER stress and pyroptosis in HepG2 cells (P < 0.01). In vivo, only olive oil supplementation did not cause significant toxicity, while HFD for 32 w obviously induced liver steatosis and inflammation in SD rats (P < 0.05). Half replacement of HFD with olive oil (a mixed diet) has remarkably ameliorated liver abnormalities, and particularly inhibited the protein expressions of either ER stress and pyroptosis markers (P < 0.05).Conclusion Palmitic acid induced predominant pyroptosis in HepG2 cells, and ER stress may be responsible for the induction of pyroptosis and subsequent cell death. Monounsaturated oleic acids were able to ameliorate hepatocellular lipotoxicity both in vitro and in vivo, and OA mediated inhibition of ER stress and pyroptosis may be the underlying mechanisms.
研究领域:
药理学
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细胞生物学
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肝病学
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分子生物学
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DOI
PubMed
高影响因子
Catalysts
·
2021
·Vol. 11
·期 12
·1471
·
IF 4.146
Zhenzhen Li,Wei Liu,Guolong Yang
Synthesized oleic acid-based wax esters (e.g., cetyl oleate), which can replace spermaceti oil or jojoba oil, have been widely used in the cosmetic, pharmaceutical and other industries. In this work, 4-dodecylbenzenesulfonic acid (DBSA) has been successfully used as an efficient catalyst to synthesize oleic acid-based wax esters through esterification at 40 °C under solvent-free conditions. A 93.6% conversion rate of cetyl alcohol was obtained under optimal conditions: 10 mol% DBSA, a molar ratio of 1.3:1 oleic acid to alcohol, a reaction temperature 40 °C and a reaction time of 4 h. The effect of water content on esterification was investigated, and it was found that the inhibitory effect of water decreased significantly with increasing temperature. Moreover, DBSA-catalyzed esterification could be applied in the production of various oleic acid-based wax esters and excellent conversion (>90%) to esters was obtained under such mild conditions. DBSA-catalyzed low-temperature esterification is an efficient method for the production of liquid wax esters.Keywords:liquid wax esters;4-dodecylbenzenesulfonic acid;esterification;oleic acid;high-oleic sunflower seed oil
研究领域:
化学工程
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化妆品科学
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生物催化
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
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2022
·
IF 9.231
Rui Liu,Xiaoli Qin,Xiong Liu,Yonghua Wang,Jinfeng Zhong
The physicochemical properties and interactions of the complex of oleic acid (OA) and β-cyclodextrin (β-CD) were studied by experimental and computational methods. Differential scanning calorimetry and X-ray diffraction confirmed the successful preparation of OA/β-CD inclusion complex. The stability of the complex was improved, exhibiting a 61.2 °C higher degradation temperature and a lower peroxide value than OA. Raman and Fourier transform infrared spectroscopy studies revealed that the carboxyl group of OA entered into the β-CD cavity to form hydrogen bonds, which was confirmed by conformational search and weak interactions analysis. Dispersion energy from van der Waals (–290.79 kJ/mol) contributed 87.3% to total interaction energy (–253.88 kJ/mol). Topological analysis showed that four moderate hydrogen bonds were formed between OA and β-CD with the bond energy ranging from –76.05 to –30.25 kJ/mol. This work provided theoretical basis for the development of nutritional supplements containing unsaturated fatty acids encapsulated by β-CD.
研究领域:
物理化学
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材料科学
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药学
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理论化学
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产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Anni Yang,Yumeng Jiang,Huiqun Ju,Tianyu Li,Jiafei Lyu,Xianghai Guo
This study proposed a precise synthetic strategy for tailoring the surface chemistry of magnetic nanomaterials and established a structure–performance relationship between surface hydroxyl density and boric acid adsorption. By modulation of the molar ratio of oleic acid to the iron source in the solvothermal reaction, a gradient control of hydroxyl density on the surface of Fe3O4 nanoparticles was systematically achieved. A novel fluorine substitution XPS method was employed to quantitatively characterize the hydroxyl density, yielding a normalized F/Fe ratio range of 0.195–0.326, which validated the feasibility and controllability of the “fine-tuning” approach. As the hydroxyl density increased, the adsorption capacity of the material increased from 0.7 to 1.5 mmol/g. Comprehensive analysis of boric acid adsorption, including adsorption kinetics, isotherms, thermodynamics, and material characterization before and after adsorption, demonstrated that the adsorption mechanism primarily involved bidentate hydroxyl complexation via a trigonal coordination configuration. These findings provide a reproducible framework for surface modification of magnetic nanomaterials and offer experimental guidance for designing high-performance boric acid adsorbents.
研究领域:
环境科学
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纳米材料
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吸附化学
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表面工程
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DOI
PubMed
高影响因子
MINERALS ENGINEERING
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2025
·
IF 5
Zhihui Shen,Jianlong Wang,Hao Zhang,Qingxia Liang,Song Mao,Hui Xie
Enhanced flotation of rhodochrosite fines via hydrophobic agglomeration offers a viable strategy for utilizing manganese carbonate ores and minimizing electrolytic manganese residue. Understanding the mechanism of hydrophobic modifiers is essential for controlling agglomeration behavior. This study investigated the synergistic effect of oleic acid (OA) and kerosene in enhancing rhodochrosite agglomeration through analysis of agglomerates properties, interfacial wettability, adsorption behavior, and interaction forces. The results show that kerosene alone exhibits negligible agglomeration effects on rhodochrosite at a lower concentration of 0.03 wt%, due to the weak adhesion and easy detachment of oil droplets on particles under shear. As kerosene increases to 0.3 wt%, coverage of oil droplets on rhodochrosite increases. However, the limited deformability and the greater critical coalescence force of oil droplets in aqueous solution result in weak agglomeration. Interestingly, agglomerates become larger and more compact with addition of OA-emulsified kerosene, mainly attributed to the dual significant enhancement of rhodochrosite hydrophobicity and bridging effect of oil droplets between particles. Hydrophobic association between OA nonpolar tail and kerosene, along with the strong adsorption of its polar head onto rhodochrosite, results in the improved deformability and spreading of oil droplets, further enhancing rhodochrosite hydrophobicity. Furthermore, changes in OA concentration at the oil–water interface during collision cause tension gradient, inducing stable oil bridges at lower critical coalescence forces. As a result, the co-effect of OA and kerosene enhances rhodochrosite agglomeration. This study offers fundamental insights into the synergistic mechanism of OA and kerosene in promoting the agglomeration of rhodochrosite and other fine particles.
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DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 15
·8766-8772
·
IF 3.119
Qiuyun Zhang,Dandan Lei,Qizhi Luo,Jialu Wang,Taoli Deng,Yutao Zhang,Peihua Ma
According to the need of sustainable development, solid catalysts are critical materials for green biodiesel production. In this study, a hydrothermal method was used to develop a reusable and highly active Fe-BTC and UiO-66 metal–organic framework encapsulated Zr-doped polyoxometalate nano-hybrid catalysts (ZrSiW/Fe-BTC and ZrSiW/UiO-66) for the acid-catalyzed esterification of oleic acid with methanol. The structural and compositional characterization of the synthesized catalysts were characterized using various techniques such as Fourier transform infrared spectrometry (FT-IR), X-ray diffraction (XRD), nitrogen adsorption–desorption, scanning electron microscopy (SEM), and thermogravimetric (TG) and temperature programmed desorption (NH3-TPD) analysis. The as-prepared ZrSiW/UiO-66 had excellent catalytic activity in the esterification of oleic acid with methanol, higher than that of ZrSiW/Fe-BTC catalyst, owing to the fact that ZrSiW/UiO-66 nano-hybrids have high acidity, large specific surface area and pore volumes, and relatively large average pore sizes. Furthermore, the reusability and stability of nano-hybrids were also evaluated, and it was found that the stability of ZrSiW/UiO-66 catalyst was better.
研究领域:
化学工程
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材料科学
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可再生能源
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2026
·
IF 2.5
Chang Zhou,Guangliang Zhang,Xiumei Tai,He Jiang,Lianbing Cui
Compared to single-function inhibitors, the novel multifunctional corrosion inhibitor developed in this study—oleic acid polyethylene glycol ester phosphate (OPP400)—achieves synergistic corrosion inhibition through molecular engineering that integrates multiple active functional segments. Its corrosion inhibition behavior and mechanism on Mg and Mg alloy in 3.5 wt% NaCl solutions were systematically investigated. The corrosion inhibition performance of OPP400 was evaluated using a combination of EIS, PDP, SEM, AFM, and contact angle measurements. The results demonstrate that at the optimal concentration of 100 mg L−1, OPP400 achieves corrosion inhibition efficiencies of 89.07% for pure Mg and 79.55% for Mg alloy. The PDP curves reveal OPP400 to be a mixed-type corrosion inhibitor. EIS reveals a marked increase in charge transfer resistance and a marked decrease in double-layer capacitance, which indicates the formation of a dense adsorbed film on the metal surface. Mott–Schottky analysis further corroborates that OPP400 selectively blocks Cl− ions by reducing the carrier density in the oxide film and enhancing the energy barrier of the passivation film. Surface analysis reveals that OPP400 significantly reduces the surface roughness of the substrate and enhances its hydrophobicity, thereby increasing the water contact angle from 37° to more than 66°. The inhibition mechanism is attributed to the synergistic effects of chemical adsorption, hydrophobic layer formation, and ionic barrier action, which collectively block the penetration of corrosive species (e.g., Cl− and H3O+). This study offers critical theoretical basis and practical guidance for the molecular design of corrosion inhibitors targeting Mg and Mg alloy.
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高影响因子
危险品化学品经营许可证（带存储）