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
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DOI
高影响因子
CHEMOSPHERE
·
2017
·
IF 4.208
Jie Zhang,Tiehua Zhang,Tianzhu Guan,Ping Ruan,Dayong Ren,Weichang Dai,Hansong Yu,Tiezhu Li
A fluorescence polarization (FP) assay for the simultaneous determination of bisphenol A (BPA), bisphenol F (BPF), bisphenol A diglycidyl ether (BADGE) and bisphenol F diglycidyl ether (BFDGE) was developed. The method was based on the competition between bisphenols (BPs) and fluorescein-labeled dexamethasone derivative (Dex-fl) for mouse peroxisome proliferator-activated receptor α ligand binding domain (mPPARα-LBD). A recombinant soluble protein derivative mPPARα-LBD* was prepared, then in vitro binding of 4 BPs to mPPARα-LBD* was investigated. Fluorescence polarization assay showed that these compounds exhibited different binding potencies with mPPARα-LBD*. Additionally, molecular dynamics simulations were performed to further understand the mechanism of BPs binding affinity for mPPARα-LBD*. Docking results elucidated that the driving forces for the binding of BPs to mPPARα-LBD* were predominantly dependent on hydrophobic and hydrogen-bonding interactions. Comparison of the calculated binding energies vs. experimental binding affinities yielded a good correlation (R 2 = 0.7258). The proposed method has potential for multi-residue detection of BPA, BPF, BADGE, and BFDGE.
研究领域:
生物化学
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环境科学
·
毒理学
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DOI
PubMed
高影响因子
CHEMISTRY OF NATURAL COMPOUNDS
·
2019
·Vol. 55
·期 1
·172-174
·
IF 0.567
Zhang H.,Wu J.,Zhu F.,Zhang X.,Zhu X.
P. N. Reddy, S. Mohanty, and S. K. Nayak, Technol. Eng.,
53, 1723 (2014).
Google Scholar
V. P. Kommula, K. Obi Reddy, S. Mukul, M. Tshilidzi, and V. A. Rajulu, Int. J. Polym. Anal.,
19, 693 (2014).Article
CAS
Google Scholar
a) D. S. Ogunniyi, Bioresour. Technol., 97, 1086 (2006); b) U. Biermann, W. Friedt, and S. Lang, Angew. Chem. Int. Ed., 39, 2206 (2000); c) U. Biermann and J. O. Metzger, Top. Catal., 27, 119 (2004); d) M. M. Conceicao, R. A. Candeia, H. J. Dantas, L. E. B. Soledade, V. J. Fernandes, and A. G. Souza, Energy Fuels, 19, 2185 (2005); e) R. E. Baynes and J. E. Riviere, Toxicol. Lett., 147, 15 (2004).L. M. Espinosa and M. A. Meier, Eur. Polym. J., 47, 837 (2011).Article
CAS
Google Scholar
a) G. C. Paddon-Jones, C. S. P. McErlean, P. Hayes, C. J. Moore, W. A. Konig, and W. Kitching, J. Org. Chem., 66, 7487 (2001); b) H. Matsuyama, T. Nakamura, and N. Kamigata, J. Org. Chem.,
54, 5218 (1989).H. F. Zhang, D. M. Liu, T. T. Kang, Y. Wang, X. X. Zhang, and X. B. Zhu, Chin. J. Org. Chem., 5, 1104 (2016).Article
CAS
Google Scholar
F. Wang, C. Z. Wang, J. T. Kuai, D. Q. Li, and X. B. Zhu, Chem. Ind. Forest Prod., 4, 112 (2015).
Google Scholar
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研究领域:
化学工程
·
材料科学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Chengmin Hou,Jiaqi Song,Qi Gui,Ze Fan
At present, the super hydrophobic surface is mostly constructed with siloxane colloid and fluoropolymer . The super hydrophobic surface can be broken by fine friction, and its acid-base resistance is poor. In this paper, firstly titanium dioxide (TiO 2 @GDE) was modified by ethylene glycol diglycyl ether (GDE). TiO 2 @GDE was mixed with dodecanoic acid (DA), perfluorodecyl triethoxysilane (PFTS) and GDE to make super hydrophobic mixture. By soaking in this mixture, the super hydrophobic surface of cotton cloth (SHC) was obtained. Among them, GDE is used as a cross-linking agent to cross-link PFTS, DA, TiO 2 @GDE and facial surface. PFTS and DA are used to reduce the surface energy, and TiO 2 @GDE is used to improve the surface roughness of cotton cloth. Secondly, the effects of construction condition parameters on the water contact angle and water rolling angle of SHC were explored. The results showed that the optimal mixture concentration was 20 g/L, soaking time was 30 min, drying temperature was 100 °C, and drying time was 2 h. Under the optimal conditions, the surface water contact angle (WCA) of the modified cotton cloth is 164±3°, and the water rolling angle is 9±3°. Finally, the obtained SHC is used for oil-water separation. Whether trichloromethane, or n -hexane and dichloromethane , separation efficiency can reach more than 99%. Whether it is the next oil-water separation directly after the completion of the last oil-water separation without drying, or the next oil-water separation after the completion of the last oil-water separation after drying, more than 10 times of oil-water separation can be carried out, and the separation efficiency can reach more than 98%. In addition, the self-cleaning property, durability, friction resistance and acid/alkali resistance of the SHC were tested, and the results were good. At the same time, the whiteness, thickness, gloss and CIELAB color are tested. The results show that the super hydrophobic coating constructed has little change in the physical properties of cotton cloth.
研究领域:
材料科学
·
环境工程
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产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2014
·Vol. 16
·期 11
·4669-4679
·
IF 6.852
Jinxia Zhou,Yu Wang,Xinwen Guo,Jingbo Mao,Shuguang Zhang
A sulfonated graphene catalyst (SG) prepared by grafting sulfonic acid-containing aryl radicals onto the two-dimensional surface of graphene was used for the etherification of glycerol with isobutene, and a reaction–extraction process was developed for easy realization of product isolation and catalyst recycling. With its ultra thin two-dimensional open substrate, stable sulfonic acid sites, amphiphilic properties and light texture, SG exhibited excellent catalytic performance in the etherification reaction. At 60–70 °C with 4 wt% catalyst loading and a molar ratio of isobutene/glycerol 4, a nearly complete conversion of glycerol in 7 h and a selectivity of more than 90 mol% to desired multi-butyl glycerol ethers were achieved. Moreover, undesired oligomerization of isobutene was successfully suppressed. When extracted with fresh glycerol, the mixture after reaction was successfully layered to two phases, with a transparent liquid containing no less than 96 wt% di- and tri-butyl glycerol ethers in the top phase as a product and a black mixture consisting of glycerol and SG in the bottom phase which can be used to start a new run with fresh isobutene addition. During six consecutive reaction–extraction cycles the catalyst maintained its robust performance.
研究领域:
化学工程
·
催化科学
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产品关联
DOI
高影响因子
JOURNAL OF CULTURAL HERITAGE
·
2025
·
IF 3.3
Jiaojiao Liu,Wenqiang Dong,Junchang Yang,Zhongwei Chen,Qingmeng Xu,Ran Chen
Historical photographs are an important category of cultural heritage and present a wealth of historical information. Unfortunately, these photographs are suffering from brittle curling, folding, and fracturing diseases, the previous strategies can correct mildly curled photographs but are inapplicable to severely brittle and extensively curled photographs. This study developed a new method based on the synergistic effects of the molecular plasticisation, cross-linking, and shaping of glycerol triglycidyl ether (GTE) to toughen, flatten, and restore embrittled and curled historical photographs. First, the effects of GTE treatment on the shrinkage and curl resistance of gelatine-based photographic films were evaluated at the macro and micro levels under accelerated humid-heat ageing conditions. Next, spectrophotometry and MATLAB calculations were used to characterise the colour difference, surface light absorption, and grey value of photographs before and after GTE treatment. Comprehensive evaluation revealed that GTE treatment combined with traditional craft techniques could successfully realise the plasticisation, flattening, restoration, and conservation of severely curled historical photographs. A storage apparatus for keeping the restored historical photographs was also devised. This study focuses on a typical practical case for the restoration, conservation, and durable preservation of curled gelatine-based historical photographs and offers theoretical and technical support for the conservation of these valuable historical artefacts.
研究领域:
文物保护
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材料科学
·
化学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yajun Zhao,Xiaotian Xu,Yu Ding,Wentao Ma,Zhoucheng Li,Baiyun Jin,Lingrui Chen,Yuanzhu Mi
In this study, polyethylene polyamine was used as the hydrophilic center, while alkyl glyceryl ethers served as hydrophobic tails, leading to the synthesis of various polyamine-based demulsifiers through a simple one-step method. The bottle test method was employed to assess their demulsification efficiency (DE) in the water-in-crude oil system, and their RSN values were measured through titration experiments. The results indicated that under conditions of 300 mg/L concentration and 40 °C, the DE of TE-8 and PE-8 reached 95.8 % and 98.63 %, respectively, without the need for additional additives. Furthermore, it was found that under general conditions, the DE increased continuously as the RSN value of the polyamine-based demulsifiers approached a certain value. Detailed demulsification experiments on TE-8 demonstrated that these types of demulsifiers exhibited excellent salt and acid-base tolerance. Additionally, the demulsification mechanism of TE-8 was inferred through its interfacial activity, competitive adsorption behaviour, and interfacial film strength. Evidence suggested that TE-8 effectively replaced the asphaltenes at the interface, thereby weakening the strength of the interfacial film and promoting the coalescence of water droplets.
研究领域:
化学工程
·
石油加工
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产品关联
DOI
高影响因子
Polymer Chemistry
·
2022
·Vol. 13
·期 37
·5325-5336
·
IF 5.364
Jieyuan Zheng,Yuquan Cai,Yang Hu,Jialong Zhu,Jiao Wei,Yuanchuan Ma,Jintao Wan,Hong Fan
Conventional epoxy thermosets lack toughness, and conventional methods to toughen them are at the cost of decreasing other properties of the materials, such as the mechanical modulus, strength and transparency. Herein, hydrogenated MQ silicone resins (H–MQ) of various M/Q ratios, where M and Q denote R3SiO1/2 and SiO4/2, respectively, are synthesized from co-hydrolytic condensation of siloxane precursors. Then, these H–MQ resins are bonded with two epoxy monomers, bio-based eugenol glycidyl ether (EG) and allyl glycidyl ether (AG), through hydrosilylation to afford EG–MQ and AG–MQ, respectively, with tailored organic segments and M/Q ratios. The obtained epoxy-functionalized MQ silicone resins will have increased compatibility with the epoxy matrix. Compared with neat DGEBA thermosets, the addition of 20% EG-1.2MQ (M/Q ratio = 1.2 : 1) leads to marked increases in impact, tensile, and flexural strengths by 90%, 3%, and 3%, respectively, as well as increases in tensile and flexural strains by 55% and 100%. The epoxidized organic segments are found to be critical for enhancing the mechanical properties of the obtained epoxy composites. The EG–MQ/epoxy composites show better mechanical properties than AG–MQ/epoxy systems due to the improved compatibility of EG–MQ with DGEBA due to the aromatic EG moieties attached. Furthermore, the thermal stability and residual yield are increased by adding these silicone resins, with an increased water contact angle from 80 to as high as 110°. Our contribution provides a new avenue for integrating such good properties as impact toughness, mechanical properties, thermal stability and water repellance into the obtained epoxy thermosetting materials, without compromising the transparency.
研究领域:
材料科学
·
高分子化学
·
复合材料
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DOI
高影响因子
Foods
·
2021
·Vol. 10
·期 12
·3127
·
IF 4.35
Risi Wang,Ya Li,Xixiang Shuai,Jun Chen,Ruihong Liang,Chengmei Liu
Traditional aerogels lack specific functional groups for the adsorption of Pb2+, which results in a low adsorption capacity and limits the application scope. Novel porous pectin-based aerogels (PPEAs) were prepared by incorporating polyethylenimine (PEI) using ethylene glycol diglycidyl ether (EGDE) as a cross-linker for the removal of Pb2+from water. The cross-linking mechanism, morphology, mechanical strength, thermal stability, adsorption properties, and mechanism of the aerogels were investigated. The aerogels possessed several desirable features, such as a large maximum Pb2+adsorption capacity (373.7 mg/g, tested at pH 5.0), ultralight (as low as 63.4 mg/cm3), high mechanical strength (stress above 0.24 MPa at 50% strain), and easy recyclability. Meanwhile, the equilibrium adsorption data was well described by the Langmuir–Freundlich (Sips) model and the kinetic adsorption process was well fitted using the pseudo-second-order model. The donor groups, such as -NH2, and oxygen-containing functional groups were responsible for the Pb2+adsorption, which was confirmed by the FTIR and XPS analysis. The excellent characteristics mean that PPEAs are highly effective adsorbents in the remediation of lead-containing wastewater.Keywords:pectin;PEI;EGDE;aerogel;Pb2+;adsorption
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Yuan-li Li,Zhao Chen,Xiao-min Liu,Ling Wang,Zheng-gang Cui
The sulfobetaine and sulfonate surfactants derived from 1,3-dialkyl glyceryl ethers were examined as surfactants for enhanced oil recovery free of alkali in high salinity and high temperature reservoir conditions. The surfactants containing polyoxypropylene-polyoxyethylene chain are relatively hydrophilic and the sulfobetaines derived from symmetric and asymmetric 1,3-dialkyl glyceryl ethers are relatively hydrophobic. The binary mixtures at appropriate molar fraction ratio are well soluble in connate water with a total salinity as high as 20,000 mg/L including 800 mg/L Ca 2+ and 40 mg/L Mg 2+ , and can reduce the interfacial tension between the connate water and crude oil to 10 −3 ∼10 -4 mN/m magnitude at and beyond 60 °C in a wide total concentration range, 0.1∼5 mM. In addition, the formulations show good resistance to the adsorption by quartz sands and prefer to form crude oil-in-connate water (O/W) emulsions.
研究领域:
石油工程
·
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
POLYMER INTERNATIONAL
·
2018
·Vol. 67
·期 9
·1266-1274
·
IF 2.352
Shanshan Shen,Cuiyun Li,Huiyun Yang,Yanyu Zhang,Fengan Han,Fuxin Han,Yanfang Liu
Three benzoxazines based on o -allylphenol and 1,6-hexamethylenediamine (HDA) or 4,4′-diaminodiphenyl methane (DDM) or 4,4′-diaminodiphenyl ether (DDE) were respectively blended with diglycidyl ether of bisphenol-A (DGEBA) in various weight ratios followed by thermal polymerization to prepare three series of benzoxazine/DGEBA copolymers. With increasing DGEBA content, the peak temperature of the exothermic peaks in the DSC curves shows a systematic increase for the three series of benzoxazine/DGEBA blends. Each copolymer shows a single glass transition temperature ( T g ). As the content of DGEBA is increased, T g reaches a minimum for the copolymer system based on HDA but a maximum for the two systems based on DDM and DDE. For the same benzoxazine/DGEBA weight ratio, copolymers based on DDM and DDE show high T g values over those based on HDA. The three series of benzoxazine/DGEBA copolymers exhibit a one-way dual shape memory effect based on T g , and the shape memory properties of the copolymers under tensile deformation mode vary with the variation of both diamine bridge structure and DGEBA content. © 2018 Society of Chemical Industry
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
Journal of Coatings Technology and Research
·
2025
·
IF 2.8
Fang Jingting,Wang Xiuwu,Wang Jing,Han Yingying,Chen Tao
Using petroleum-based plastic materials poses many serious problems, including resource consumption and environmental pollution. Paper-based materials are good substitutes for plastic products because of their biodegradability, resource-richness, and recyclability. Paper’s poor water and oil resistance limits its wide application in food packaging. The use of water and oil repellents is an effective strategy to improve the barrier properties of paper. However, fluorine-containing oil repellents produce perfluorooctanoic acid/perfluorooctanesulfonyl compounds (PFOA/PFOS), which are hazardous to human beings and the environment, during the preparation and use of the repellents. Therefore, developing non-toxic, harmless, and biodegradable bio-based waterproof and oil-resistant coatings is the mainstream trend in the future. In this study, simple and environmentally friendly fluorine-free waterproof and oil-resistant coatings for food wrapping paper were developed by grafting oleyl alcohol onto chitosan using the ring-opening reaction of epichlorohydrin, and the reagents successfully adhered to the surface of the paper. The successful synthesis of waterproof and oil-resistant coatings was confirmed by nuclear magnetic resonance (NMR) and infrared (IR) analyses. The chitosan-based coatings (CHI-g-xOA, x = 1/8, 1/4, 1/2, 1) with different oleyl alcohol contents were prepared by the facile method. The obtained coated paper CHI-g-xOA-p ( x = 1/4) has not only excellent oil resistance (Kit rating value of 11 ± 1.0/12), which meets the food-grade oil-proof requirement, but also has excellent water resistance (Cobb 60 value of 11.86 ± 1.60 g/m 2 ). Compared with the uncoated paper, the tensile strength and water vapor transmission rate of the coated paper were significantly improved.
研究领域:
材料科学
·
高分子化学
·
食品包装技术
·
环境科学
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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）