Foods
·
2023
·Vol. 12
·期 2
·345
·
IF 5.2
Yingzhu Zhang,Jinqi Xu,Cuie Tang,Yan Li
Oleogels have been shown as a promising replacer of hydrogenated vegetable oil. Fatty acid glycerides, including some typical mono- and di-glycerides, were used to form oleogels. The concentration effects of fatty acid glycerides on the crystallization behavior and physical properties of oleogels were investigated by using different analysis techniques. The results showed that all the oleogels formed by saturated fatty acid glycerides (glyceryl monostearate (GMS), glyceryl monolaurate (GML), glycerol monocaprylate (GMC)) exhibited a solid-like behavior and were thermally reversible systems, while a higher amount of unsaturated fatty acid glycerides (monoolein (GMO), diolein (GDO)) were needed to form oleogels. The onset gelation concentration of GMS and GMC was found to be 2 wt% (w/w), while that of GML was 4 wt% by the inverted tube method. The crystallization results illustrated that the GMS and GMC formed small needle-like crystals with the presence of β and β′ crystals, while GML formed large flake-like crystals with α crystals in oleogels, and faster cooling rates caused smaller crystals. GMS- and GMC-based oleogels had higher crystallinity, resulting in higher thermal stability and better mechanical properties than GML-based ones at the same monoglyceride (MAG) level. With the increasing MAG content, the oleogels showed a more compact three-dimensional network leading to higher mechanical properties and better thermal stability and resistance to deformations. Hence, MAG-based oleogels, especially GMC ones with medium chain fatty acid, could be a promising replacer for hydrogenation vegetable oils.Keywords:oleogel;monoglyceride;chain length;crystallization;physical properties
研究领域:
食品科学
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材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Zehua Zhang,Yiyuan Zou,Zhiling Tang,Haoran Luo,Yun Zhou,Jia Chen,Guohua Zhao
Monoglycerides are widely used in flour-based products, but the roles of their dispersibility and acyl chain length remain unclear. This study investigated the effects of monoglycerides with different chain lengths (C12, C16, C18) dispersed in deionized water (DW) or 95 % ethanol (EE) on fresh noodle quality. Ethanol (2 mL per 200 g flour) had no significant effect on noodle properties, but monoglycerides in EE significantly altered gluten structure through covalent and non-covalent interactions, forming a denser gluten network, as observed by CLSM. Starch-lipid complex formation was confirmed by FT-IR, Raman, and XRD, enhancing cooking and immersion performance. Monoglycerides in EE were more effective than in DW, with impact orders: DW (C12 > C16 ≈ C18) and EE (C12 < C16 < C18), indicating solvent selection was more critical than chain length. This study refined the application method of monoglycerides, enhancing their functional performance and contributing to elevated noodle performance.
研究领域:
食品科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Hazardous Materials Letters
·
2023
·
IF 0
Ying Lyu,Baohua Wang,Mark L. Brusseau
The impact of chain length on the retention and transport of perfluorocarboxylic acids (PFCAs) in a quartz sand was investigated. Short-chain (C4–C7: PFBA, PFPeA, PFHxA, PFHpA) and long-chain (C8–C10: PFOA, PFNA, PFDA) PFCAs were selected as a representative homologous series. Miscible-displacement transport experiments were conducted under saturated conditions to characterize the magnitudes of sorption mediating retention and transport. Quantitative-structure/property-relationship (QSPR) analysis was applied to characterize the influence of molecular size on sorption. The transport of the long-chain PFCAs exhibited greater retardation than the short-chain PFCAs. The log of the equilibrium sorption coefficient ( K d ) exhibited a biphasic relationship with carbon number and molar volume, with the magnitude of measured sorption for the short-chain PFCAs significantly greater than would be predicted using the QSPR regression developed for the long-chain PFCAs. This is consistent with batch-measured data reported in the literature, and likely reflects the relative influence of different sorption mechanisms for the short-chain vs long-chain PFCAs.
研究领域:
环境科学
·
化学
✓ 已验证
DOI
Agriculture-Basel
·
2019
·Vol. 9
·期 12
·250
·
IF 0
Hua Huang,Yueming Jiang
This study comprehensively analysed the chemical composition of the cuticle in pitaya fruits. The total coverage amount of the waxes versus cutin monomers accumulated at a ratio of 0.6, corresponding to masses per unit of 30.3 μg·cm−2and 50.8 μg·cm−2, respectively. The predominant wax mixtures weren-alkanes in homologous series of C20–C35, dominated by C31and C33; as well as triterpenoids with an abundant amount of uvaol, lupenon, β-amyrinon, and β-amyrin. The most prominent cutin compounds were C16- and C18-type monomers, in which 9(10),16-diOH-hexadecanoic acid and 9,10-epoxy-ω-OH-octadecanoic acid predominated, respectively. The average chain length (ACL) of aliphates in pitaya fruit cuticle (30.5) was similar to that estimated in leaf waxes, and higher than that in most of the fruit and petal waxes that have been reported. We propose that the relatively high ACL and wax/cutin ratio might enhance the cuticular barrier properties in pitaya fruit cuticle to withstand drought.Keywords:pitaya fruit;cuticle;wax;cutin;ACL
研究领域:
植物科学
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农业化学
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产品关联
DOI
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2016
·Vol. 16
·期 6
·5689-5695
·
IF 1.338
Wu Jindan,Jiang Yuelin,Cai Guoqiang,Wang Zhengliao,He Ju,Wang Jiping
With the development of material science, pH-responsive fabric emerges as a novel material in recent years. Effect of chain density and chain length on the conformation transition of surfaceanchored polymers is a fundamental problem which relates to their functionality. In this work,
poly(acrylic acid) (PAA) was grafted onto cotton fabrics through surface-initiated atom transfer radical polymerization (ATRP) technique. The chain length of PAA was modulated by monomer concentration, and the grafting density was regulated by the density of amino groups on the fabric surface.
Contact angle analysis, IR measurement and water uptake observation were employed to study the pH-responsive behavior of the PAA modified cotton. Fabrics with polymers of a larger molecular weight and optimal grafting density exhibited better pH-responsibility. This study provided a structure-property
fundamental understanding on the important parameters influencing the pH-responsibility of PAA modified cotton fabric.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
PubMed
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2020
·
IF 3.784
Jiahang Liu,Jian He,Pan Wu,Chao Yang,Wei Jiang
The preparation of superhydrophobic metal surfaces by one-step immersion in fatty acid solutions is simple and convenient, but the effect of the fatty acid type has not been investigated. In this work, Cu meshes were soaked in ethanol solutions of fatty acids with different carbon chain lengths to obtain surfaces with different wettabilities , which varied from superhydrophilicity to superhydrophobicity. The results showed that the contact angle of the surfaces gradually increased from 2.7 ° for the sample prepared with formic acid to 151.8 ° for the sample prepared with myristic acid. The maximum apparent surface energy and solubility parameter were 82.33 mN/m and 65.79 J 1/2 /cm 3/2 for the C 1 -Cu surface, and the lowest were only 6.3 mN/m and 19.91 J 1/2 /cm 3/2 , respectively, for C 14 -Cu. A simulation confirmed that as the carbon chain length of the fatty acid increased, the solubility parameter decreased, and the hydrophobicity increased. One-step immersion enables facile, inexpensive one-step preparation of membrane surfaces with controllable superhydrophobicity for large-scale industrial applications.
研究领域:
材料科学
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表面工程
✓ 已验证
DOI
高影响因子
Journal of Oleo Science
·
2025
·
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
·
腐蚀与防护
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Soft Matter
·
2015
·Vol. 11
·期 14
·2885-2892
·
IF 4.029
Dashuang Fan,Peizhu Zheng,Yuanming Ma,Tianxiang Yin,Jihua Zhao,Weiguo Shen
The concentration-dependent enthalpies of mixing for water/sodium bis(2-ethylhexyl)-sulfosuccinate (AOT)/n-alkane microemulsions with different water contents ω0 and chain lengths n of n-alkane were determined by isothermal titration microcalorimetry (ITC) and flow-mixing microcalorimetry at 298.15 K and used to calculate the interaction enthalpies (−ΔHC) between the droplets. It was found that −ΔHC increased with ω0, and changed from negative to positive at about ω0 = 10. The investigation of the dependence of −ΔHC on n revealed that the values of −ΔHC were negative and had a minimum for ω0 = 5; while they were positive and had a maximum for ω0 = 15. These phenomena were discussed based on the competition of the overlapping contribution of the surfactant tails between two neighbouring droplets and the penetration contribution of the solvent molecules into the surfactant tails. These results indicated the important role of entropy in the stability of the microemulsion systems.
研究领域:
化学
·
物理化学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2021
·
IF 4.311
Xuesong Jiang,Jian Shi,Chen Chen,Wangfeng Song,Boyuan Ban,Jingwei Li,Anshu Wang,Jian Chen
In this study, the flotation behavior and adsorption mechanism of quartz flotation using poly (propylene glycol) bis (2-aminopropyl ether) (PEA) with different carbon chain lengths as collectors were studied. The mineral properties and adsorption mechanism were analyzed using XRD, ICP-OES, FTIR, and XPS tests. The results show that the water solubility of the collector is negatively related to the chain length. The insertion of the ether bonds (C─O─C) and the two amine groups (─NH 2 ) improve the water solubility of PEA. Their collection capacity is proportional to the chain length and the insertion of the ether bonds hardly affects their collection capacity. PEA is attached to the quartz surface mainly by electrostatic adsorption, and to a less extent by hydrogen bond adsorption. Based on the above results, PEA-D400 can be used as a collector to separate low-grade quartz into products of different purity levels.
研究领域:
矿物加工工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
LIQUID CRYSTALS
·
2022
·
IF 2.676
Xiang-Yu Ma,Qiu-Cheng Li,Cheng-Han Song,Hong-Shuang Zhang,Yuan-Sen Zhi,Xiao-Zhi He
Fluorescent liquid crystal polymers have attracted much attention because of the combination of fluorescence, liquid crystallinity and processability. In this study, we designed and synthesised two series of photoluminescent cholesteric liquid crystal polysiloxanes, which contained cholesterol mesogens and fluorescein methyl ester with different side chain lengths. The chemical structures and liquid crystal properties of the polymers were investigated by the usual methods. The photoluminescent property were characterised by fluorescence spectroscopy. At the same time, the effects of the lengths of the fluorescent group chains on the liquid crystal and fluorescence properties of the polymers were studied. The results showed that the synthesised polymers possessing very good fluorescent and liquid crystal properties, which may has certain practical value and application prospect.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 9
·3911
·
IF 4.6
Saizhen Jin,Qing Shi,Leming Ou
This work investigated the hydrophobic flocculation of cassiterite using four alkyl hydroxamic acids with varying carbon chain lengths, i.e., hexyl hydroxamate (C6), octyl hydroxamate (C8), decyl hydroxamate (C10) and dodecyl hydroxamate (C12), as collectors. Microflotation tests were performed to investigate the flotation behaviour of cassiterite in the presence of the four alkyl hydroxamic acids. Focused beam reflectance measurement (FBRM) and a particle video microscope (PVM) were used to analyse and monitor the real-time evolution of the particle size distribution of cassiterite and the images of flocs during flocculation. The extended DLVO theory interaction energies between the cassiterite particles were calculated on the basis of the measured contact angle and the zeta potential of cassiterite to determine the aggregation and dispersion behaviour of the cassiterite particles. The microflotation test results suggested that the floatability of cassiterite improved with the increase in the carbon chain length of hydroxamates. FBRM, PVM images and extended DLVO theory calculation results indicated that when C6was used as the collector, the cassiterite particles could not form hydrophobic flocs because the total potential energy between them was repulsive. When C8, C10and C12were used as collectors, the energy barrier amongst particles decreased with increasing hydroxamate concentration. The lowest concentrations of C8, C10and C12that could cause the hydrophobic aggregation of cassiterite were approximately 1 × 10−3, 1 × 10−4and 2 × 10−5mol/L, respectively. The aggregation growth rate and apparent floc size increased with an increasing collector concentration. Hydroxamic acid with a longer carbon chain could induce the cassiterite particles to form larger flocs at a lower concentration in a shorter time.Keywords:fine cassiterite;alkyl hydroxamates;hydrophobic flocculation;carbon chain length
研究领域:
矿物加工工程
·
表面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2014
·
IF 2.045
Yongzhao Zhang,Xia Guo,Jianbing Ji
(2R,3S,4S,5S)-6-(Hydroxymethyl)-tetrahydro-2H-pyran-2,3,4,5-tetraol (d-glucose) solubility in 1-dodecanol, 1-decanol, and 1-octanol from 343.15 K to 393.15 K was determined, respectively. The solubility of d-glucose increased with an increase in temperature and decreased with the increase of fatty alcohol chain length. The modified UNIQUAC model, S-UNIFAC model, and mS-UNIFAC model were applied to predict the solubility data; the interaction parameters were determined. Of the three models, the modified UNIQUAC model showed better prediction accuracy.
研究领域:
化学工程
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）