COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Li-Jing Zhu,Ming Yang,Gang Wang,Zhi-Xiang Zeng,Zheng-Feng Jia
Superoleophobic and anti-oil adhesion behavior has been considered the central character of the materials for removing oil from wastewater. Herein, poly(vinylidene fluoride)/poly(N-isopropylacrylamide) (PVDF/PNIPAM) membranes were fabricated by vapor-induced phase separation (VIPS) and then further post-modified by deposition of sulfonated dopamine (SDA). The resulting membrane has a strong underwater superoleophobicity with an underwater toluene contact angle of 163 ± 2° and an ultralow adhesion force (1.9 ± 0.02 µN) between the surface and the oil. Therefore, it can efficiently remove emulsified toluene from water with a flux of 2211 ± 80 L m −2 h −1 bar −1 and an oil rejection of 99.5 ± 0.4%. This work offers a novel technique for the fabrication of porous membranes with excellent anti-oil fouling performance which will be practically used in the treatment of emulsified oils.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2018
·
IF 2.829
Yunrui Han,Zhaoming Yang,Limin He,Xiaoming Luo,Rifeng Zhou,Kaiyue Shi,Jianpeng Su
In this paper, the spread behaviors of the underwater oil droplet on smooth brass substrate and 316L stainless steel (a kind of low-carbon subtype of marine grade stainless steel) substrate were studied from the microscopic view by using high-speed microscopic imaging technology. Chemical modifications were made on the surface of the brass sheet to change the surface properties and the controllable regulation of superoleophilic–superoleophobic wettability gradient surface was achieved successfully. The behaviors of the spreading length and contact angle of the oil droplet rising to different modified surfaces were observed and measured. Taking the influence of water surrounding the oil droplet into consideration, a quantitative relation among droplet dimensionless spreading length, the droplet impact velocity, droplet size, droplet properties, viscosity of the water and surface wettability was acquired through energy analysis for the spreading behaviors of the oil droplet rising to the surfaces. Then an improved spreading dynamic model was established to describe the spreading behaviors of underwater oil droplets on surfaces with different wetting properties.
研究领域:
材料科学
·
流体力学
✓ 已验证
产品关联
DOI
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
·
化妆品科学
·
生物催化
✓ 已验证
产品关联
DOI
高影响因子
Foods
·
2022
·Vol. 11
·期 11
·1661
·
IF 5.561
Ruijia Liu,Nan Qi,Jie Sun,Haitao Chen,Ning Zhang,Baoguo Sun
Fried pepper (Zanthoxylum bungeanumMaxim.) oil (FPO) is widely used in Chinese cuisine because of its unique aroma. To investigate the effects of different frying temperatures and different frying times on the volatile composition and odor characteristics of FPOs, descriptive sensory analysis (DSA), solvent-assisted flavor evaporation–gas chromatography–mass spectrometry (SAFE–GC–MS) and electronic nose (E-nose) were used to analyze the FPOs (FPO1–FPO4 represented the pepper oil fried at 110 °C, 120 °C, 130 °C, and 140 °C; FPO5–FPO7 represented the pepper oil fried for 10 min, 20 min and 30 min). The results showed that FPO3 and FPO6 had strong citrus-like and floral aromas and exhibited significant advantages in sensory attributes. A total of 46 volatile compounds were identified by SAFE–GC–MS; among them, FPO3 and FPO6 had a higher volatile compound content.β-Caryophyllene was detected in only FPO3 and FPO6; linalool was higher in FPO3 and FPO6, which might cause them to exhibit stronger floral and citrus-like aromas. The presence of (2E,4E)-2,4-decanedienal would be one of the reasons for the strong fatty aroma exhibited in FPO4 and FPO7. FPO3 and FPO6 were associated with citrus-like and floral aromas by partial least squares regression (PLSR) analysis, which agreed with the sensory evaluation results.Keywords:fried pepper oil;frying temperatures;frying times;GC–MS;odor;aroma profiles
研究领域:
食品科学
·
化学工程
·
感官分析
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2016
·
IF 3.611
Yuan Xue,Weina Zhao,Peng Ma,Zhicheng Zhao,Guangwen Xu,Chao Yang,Hongyan Chen,Hualin Lin,Sheng Han
This study aims to reduce the cloud point (CP), cold filter plugging point (CFPP) and pour point (PP) of biodiesel from waste cooking oil (BWCO) by ternary complementary blending 0# petro-diesel (PD) and diesel from direct coal liquefaction (DDCL) with BWCO. The cold flow properties of BWCO–PD–DDCL ternary blends, and BWCO–PD, BWCO–DDCL binary blends were comparative evaluated. Ternary phase diagrams were used to present the blending effect on the CP, CFPP, and PP of biodiesel. Results indicated that PD and DDCL exhibited positive synergistic effects on improving the cold flow properties of ternary blends. Ternary blends containing 20% BWCO and 10–40% PD have lower CFPP with respect to BWCO–PD and BWCO–DDCL blends in volume ratio of 20:80. When blends contain up to 60% DDCL and less than 15% BWCO, such fuels could be used in extremely low temperature areas. Other fuel properties were also determined and compared with the ASTM D7467. In addition, to explore the performance mechanism, differential scanning calorimetry and polarizing optical microscopy were used to observe the crystallization behavior and crystal morphology of blends fuel.
研究领域:
能源工程
·
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
FOOD CONTROL
·
2025
·
IF 6.3
Yaoyao Zhang,Zhaohan Feng,Shangde Sun
The 3-monochloropropane-1, 2-diol esters (3-MCPDEs) and glycidyl esters (GEs), which are recognized as contaminants often produced during the deodorization process of refined edible oils, have garnered widespread attention and research interest in recent years due to their potential health risks to humans. Although there have been studies on the formation mechanisms of 3-MCPDEs and GEs, further clarification is still needed in the intrinsic synergistic effects of precursors. Herein, the synergistic effects of acylglycerols, including monoacylglycerols (MAGs), diacylglycerols (DAGs), and triacylglycerols (TAGs) on the formation of 3-MCPDEs and GEs were innovatively investigated through simulated deodorization experiments in model soybean oil systems. Additionally, the effects of simulated deodorization conditions, including temperatures, heating duration, chloride contents, and acylglycerol compositions on the production of 3-MCPDEs and GEs, were also investigated. The results indicated that under the simulated deodorization process and in the presence of chloride ions, the formation of 3-MCPDEs and GEs was facilitated by the synergistic interaction among MAGs, DAGs and TAGs. It is noteworthy that MAGs were more susceptible to forming 3-MCPDEs in the presence of chloride ions, whereas GEs predominantly resulted from the cyclization reaction of DAGs. Concurrently, when the MAGs content was less than 1%, or the presence of DAGs was less than 4% in the model system, the formation of both 3-MCPDEs and GEs was found to be below the EU regulatory limits, thus offering a solid theoretical basis for the control of 3-MCPDEs and GEs in refined oils.
研究领域:
食品科学
·
毒理学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2020
·Vol. 12
·期 9
·2165
·
IF 3.426
Jijun Tang,Jinshuai Zhang,Jianyu Lu,Jia Huang,Fei Zhang,Yun Hu,Chengguo Liu,Rongrong An,Hongcheng Miao,Yuanyuan Chen,Tian Huang,Yonghong Zhou
Novel oil-based epoxy acrylate (EA)-like prepolymers were synthesized via the ring-opening reaction of epoxidized plant oils with a new unsaturated carboxyl acid precursor (MAAMA) synthesized by reacting maleic anhydride (MA) with methallyl alcohol (MAA). Since the employed epoxidized oils including epoxidized soybean oil (ESO), epoxidized rubber seed oil (ERSO), and epoxidized wilsoniana seed oil (EWSO) possessed epoxy values of 7.34–4.38%, the obtained epoxy acrylate (EA)-like prepolymers (MMESO, MMERSO, and MMEWSO) indicated a C=C functionality of 7.81–4.40 per triglyceride. Furthermore, effects of the C=C functionality and the addition of hydroxyethyl methacrylate (HEMA) diluent on the ultimate properties of the resulting UV-cured EA-like materials were investigated and compared with those of commercially available acrylated ESO (AESO) resins. As the C=C functionality increased, the storage modulus at 25 °C (E’25), glass transition temperature (Tg), 5% weight–loss temperature (T5), tensile strength and modulus (σandE), and hardness of the coating for both the pure EA and EA/HEMA resins increased significantly as well. These properties indicated similar trends when comparing the EA materials with 30% of HEMA with those pure EA materials. Specially, although ERSO had a clearly lower epoxy value that ESO, both the UV-cured pure MMERSO and MMERSO/HEMA materials showed much betterE’25,Tg,σ, andEthan their AESO counterparts, indicating that the MAAMA modification of epoxidized plant oils was much more effective than the modification of acrylic acid to achieve high-performance oil-based epoxy acrylate resins.Keywords:soybean oil;rubber seed oil;wilsoniana seed oil;epoxy acrylate;UV-curable coatings
研究领域:
材料科学
·
化学工程
·
高分子科学
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Xiaojing Su,Fawei Xie,Junlin Li,Yiyang Huang,Kunquan Li,Huali Xie,Wenjian Wu,Xin Xie
Underwater superoleophobic coatings, known for their anti-oil-fouling properties, have garnered significant interest in the context of oily wastewater remediation. However, these coatings encounter challenges in preventing viscous oil contamination and structural damage, and easily become ineffective when treating crude oil/water pollutants. Additionally, the non-renewable and non-biodegradable components pose a huge risk to environmental safety and sustainable development. Herein, a cellulose-based coating that combines robust underwater superoleophobicity with anti-viscous oil-fouling characteristic is designed via the extraction of micro/nanoscale heteromorphic cellulose crystals (EHCC) and subsequent crosslinking with carboxymethyl chitosan (CCS). Leveraging the hierarchical micro/nanostructures constructed by EHCC and intensified hydration capability facilitated by multiple hydrogen bonding interactions, the EHCC-CCS coating demonstrates excellent superhydrophilicity/underwater superoleophobicity and ultralow-viscous oil-adhesion property. Moreover, the EHCC-CCS coating exhibits robust chemical resistance and mechanical tolerance. Importantly, it adapts effectively to various flat and porous substrates, offering outstanding anti-oil-fouling and self-cleaning performances. Notably, the EHCC-CCS-coated textile is applied in separating immiscible oil/water mixtures with varying oil viscosities, and the EHCC-CCS-coated PVDF membrane achieves to purify surfactant-stabilized crude oil/water emulsion. The findings provide a straightforward and cost-effective approach for large-scale production of fully biobased coatings with durable underwater superoleophobicity and excellent anti-viscous oil-fouling capability for complex oily wastewater remediation.
研究领域:
材料科学
·
环境科学
·
生物材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2022
·
IF 4.331
Xiaoqing Li,Dandan Liu,Hao Sun,Xiaobing Li
In this work, the effect of oil-displacing agent composition on oil/water interface stability of the asphaltene-rich alkali–surfactant–polymer (ASP) flooding-produced water was systematically investigated, especially from the perspective of the interaction between oil displacement agents and asphaltene at the oil/water interface. Primarily, adsorption behavior of the artificial and natural interfacial substances (oil displacement surfactant and asphaltenes) on the oil/water interface was investigated by molecular dynamics simulation. The oil displacement surfactant and asphaltenes formed a cross-linked and compact interfacial film structure, which significantly enhanced the interface stability; the more the oil displacement surfactants adsorbed on the interface, the more stable is the cross-linked structure formed between them and asphaltenes. Then, the interfacial property variations that are originating from the interactions differences between oil displacement agents and asphaltenes were monitored via interfacial tension, zeta potential, and interfacial film rheology tests. Moreover, the effect of oil displacement agent concentrations on the interfacial film thinning and rupture kinetic behavior was further investigated. Finally, cream experiments were conducted to verify the effect of oil displacement agent composition on the oil/water separation efficiencies of asphaltene-rich ASP flooding-produced water. When 5% asphaltenes was added, the creaming oil removal rate reduced from 90.0 to 85.3% at 19 h. The interactions between asphaltenes and oil displacement agents immensely enhance the oil/water interfacial film strength and impede the oil/water separation process.
研究领域:
石油工程
·
界面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2015
·
IF 3.512
Pu-You Jia,Cai-Ying Bo,Li-Qiang Zhang,Li-Hong Hu,Meng Zhang,Yong-Hong Zhou
Epoxidized castor oil (ECO) and castor oil phosphate ester (COPE) were synthesized. Structure of two functionalized castor oil was characterized with FTIR and 1 H NMR. Property of poly (vinyl chloride) PVC blends plasticized with ECO and (COPE) as secondary plasticizer was studied. The results indicated that thermal stability of plasticized PVC blends was improved, LOI value of PVC blends cooperated with COPE could reach 27.8%, flame retardant performance of COPE was put into effect by promoting polymer carbonization and forming a consolidated and thick flame retardant coating, which is effective to prohibit the heat flux and air incursion.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yajun Zhao,Min Huang,Xialing Wang,Yu Ding,Lingrui Chen,Qian Qu,Yuqi Tang,Yuanzhu Mi
In this paper, two demulsifiers (PDA-L and GDA-L) were synthesized by grafting lauric acid on polyethylene glycol diglycidyl ether or glycerol triglycidyl ether. The structure of PDA-L and GDA-L were analyzed by FTIR and 1 HNMR, and the demulsification performance in water-in-oil emulsion was detailly evaluated by the bottle test. The results showed that PDA-L exhibited higher demulsification efficiency (DE) compared to GDA-L, attributed to its more appropriate amphiphilic characteristics. Judging by the results, when the dosage of PDA-L was 500 mg/L, the DE could achieve 100 % within 4 h at a temperature of 50 °C, and it also had excellent demulsification performance in a wide pH range (4–10) and high salinity. The competitive adsorption behavior of asphaltenes and PDA-L at the oil–water interface was studied by interfacial tension and three-phase contact angle. Moreover, the effect of PDA-L on the interfacial film strength was studied by coalescence time of droplets and viscoelastic modulus. Based on previous tests, a possible demulsification mechanism was proposed. PDA-L features a hydrophilic core and two extended hydrophobic alkyl chains, allowing it to readily move to the oil–water interface. This process facilitates the replacement of asphaltene and the formation of an unstable composite film, thereby promoting demulsification.
研究领域:
化学工程
·
石油工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Oleo Science
·
2020
·
IF 1.304
Luyang Lu,Ping Yang,Tian Chen,Yanfu Shen,Qian Yao,Jun Yan
Activity changes after olive oil (OO), pomegranate seed oil (PSO), and grape seed oil (GSO) were formulated into self-nanoemulsifying systems (SNES), were examined in this study. Only GSO SNES dramatically enhanced antioxidant activity of GSO. SNES from OO and PSO did not exert obvious impact on radical quenching ability of the oils. Though PSO exhibited significantly stronger strength over OO in suppressing E. coli (p < 0.05), the inhibitory effect of OO SNES against E. coli became slightly higher than that of PSO SNES. Similar phenomenon happened in GSO, OO, and their SNES for preventing Yeast growth. The study indicated that SNES sometimes reversed the strength order of the original oils in inhibiting bacteria.
研究领域:
食品科学
·
生物学
✓ 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）