Environmental Progress & Sustainable Energy
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2016
·Vol. 36
·期 2
·571-576
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IF 1.631
Juan-Hua Kong,Jing Chen,Jian-Ping Huang,Chang-Gan Huang,Wan-Ming Xiong
The acidic dication ionic liquid C 3 MS was prepared and then was applied in the preparation of biodiesel from soybean oil or waste cooking oil in subcritical methanol. The effects of the reaction temperature and reaction time on the biodiesel yield were investigated and the chemical components of products were analyzed with GC-MS. The results showed that the catalyst had exhibited a highly effective catalytic activity and strong stability. The yield of biodiesel from soybean oil under optimum conditions was up to 98% and it could be maintained at 93.7% even if the catalyst had been reused for seven times. Under the same condition, the yields of biodiesel from four kinds of waste cooking oil were more than 92%, and the highest yield could reach up to 97.2%. The results of GC-MS showed that the main components of products were methyl ester of palmitic acid, oleic acid, linoleic acid, stearic acid and ricinoleic acid, and the total content of fatty acid methyl esters (FAME) was more than 99% (except from LRO). In addition, the content of water, free fatty acid and the degree of unsaturation would slightly lower the yield of biodiesel. In a word, the dication ionic liquids could be regarded as a potential catalyst for the biodiesel preparation. © 2016 American Institute of Chemical Engineers Environ Prog, 36: 571–576, 2017
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CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
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2017
·Vol. 33
·期 6
·929-933
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IF 1.024
Bu Luxia,Liu Daying,Wei Zhen,Ma Zhanlin
The preparation and characterization of homogeneous and colorless ionic liquid analogs(ILAs) containing choline chloride(ChCl), malonic acid and bismuth chloride were investigated. The structure of the above mixture was preliminarily analyzed, and then the physicochemical properties including viscosity, conductivity and density were investigated as functions of temperature and composition. Additionally, the thermal stability of the ILAs and the electrochemical behavior of Bi3+ ions in the medium were studied. Structure analysis reveals that the synthesis of deep eutectic solvents(DESs) is closely related to the formation of hydrogen bonds between malonic acid and ChCl, with their viscosity, conductivity and density being greatly dependent on the temperature and composition. Thermogravimetric analysis demonstrates that the ILAs are very stable between room temperature and 398.15 K. And the electrochemical experiments indicate that the bismuth films can be successfully deposited from this ILAs and the deposition mechanism of bismuth is a rather irreversible process. The surface morphology of bismuth films deposited on Cu substrates was very compact and smooth. Thus, ChCl-malonic acid DESs were shown to be a good alternative to aqueous solvents for various deposition-related applications.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2016
·Vol. 134
·期 11
·
IF 1.866
Lei Huang,Yufen Jin,Li Sun,Feng Chen,Ping Fan,Mingqiang Zhong,Jintao Yang
Poly(ionic liquid)s have been demonstrated as high efficient CO 2 absorbents. In the current study, a kind of poly(ionic liquid)s, Poly[2-(methacryloyloxy)-ethyl] trimethylammonium tetrafluoroborate (P[MATMA][BF 4 ]) was used to functionalize graphene oxide (GO). The hybrid in which P[MATMA][BF 4 ] was covalently bonded on GO platelets was prepared by a simple method, that is, traditional radical polymerization. The characterizations based on transmission electron microscopy, scanning electron microscope, Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy demonstrated the graft of P[MATMA][BF 4 ] on GO. N 2 adsorption measurements indicated that P[MATMA][BF 4 ] also greatly increased the specific surface area of GO. Due to the higher specific surface area and the CO 2 affinity of P[MATMA][BF 4 ], the GO-P[MATMA][BF 4 ] hybrid exhibited a much higher CO 2 adsorption capacity compared with GO, GO-NH 2 , and P[MATMA][BF 4 ]. Their study showed that the combinations of poly(ionic liquid)s and GO could be promising CO 2 absorbents. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44592.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Tongjun Yang,Junpeng Xu,Hailiang Sheng,Junqin Wang,Gang Hu,Songmiao Liang,Lijie Hu,Lihua Zhang,Haibo Xie
The CO 2 -based reversible ionic liquid solution of 1,1,3,3-tetramethylguanidine (TMG) and ethylene glycol (EG) in dimethyl sulfoxide (DMSO) after capturing CO 2 , (2[TMGH] + [O 2 COCH 2 CH 2 OCO 2 ] 2− /DMSO ( χ RILs = 0.1), provides a sustainable and effective platform for cellulose dissolution and homogeneous utilization. Highly porous cellulose aerogel beads and monoliths were successfully prepared via a sol-gel process by extruding cellulose solution into different coagulation baths (NaOH aqueous solution or alcohols) and exposing the cellulose solution in open environment, respectively, and followed by different drying techniques, including supercritical CO 2 -drying, freeze-drying and air-drying. The effect of the coagulation baths and drying protocols on the multi-scale structure of the as-prepared cellulose aerogel beads and monoliths were studied in detail, and the sol-gel transition mechanism was also studied by the solvatochromic parameters determination. High specific surface area of 252 and 207 m 2 /g for aerogel beads and monoliths were achieved, respectively. The potential of cellulose aerogels in dye adsorption was demonstrated.
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Xiaoyan Tan,Yitao Huang,Umair Muhammad,Chao Song,Sai Zhang,Xueshan Xia,Yue Feng,Ling Guo,Guowei Wang,Zhendan He,Fengwei Xie
There have been continuous quests for suitable solvents for starch, given the importance of effective starch dissolution in its modification and subsequent materials production. In light of this, the potential of hydroxyl-functionalized ionic liquid (IL) as a promising solvent for starch was investigated. Within this study, a hydroxyl-functionalized IL 1-(2,3-dihydroxypropyl)-3-methylimidazole chloride ([Dhpmim][Cl]) was synthesized, and the dissolution of starch in this IL and its aqueous solutions was examined. Starch (5.35 wt%) was completely dissolved in [Dhpmim][Cl] within 2 h at 100 °C. The solubility of starch in [Dhpmim][Cl]-water mixtures initially increased and then decreased with rising water content. The optimal ratio was found to be 1:9 (wt/wt) water:[Dhpmim][Cl], achieving the highest solubility at 9.28 wt%. Density functional theory (DFT) simulations elucidated the possible interactions between starch and solvents. After dissolution and regeneration in the 1:9 water:[Dhpmim][Cl] mixture, starch showed no discernible change in the molecular structure, with no derivatization reaction observed. Regenerated starch exhibited a transformation in crystalline structure from A-type to V -type, and its relative crystallinity (12.4 %) was lower than that of native starch (25.2 %), resulting in decreased thermal stability. This study suggests that the hydroxyl-functionalized IL, [Dhpmim][Cl], and its aqueous solutions serve as effective solvents for starch dissolution.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Meisi Chen,Weida Chen,Bin Jiang,Ying Huang,Tong Lei,Feng Zhang,Youting Wu
An amino acid based ionic liquid ([N 1111 ][Ala]) was employed as a trigger to start the phase separation of 2-(2-aminoethylamino) ethanol (AEEA) and 1-ethylimidazole (Eim) solutions (AEH) and to enhance CO 2 capture. Due to the accompanying phase change, the CO 2 load of AEEA-Eim-H 2 O-[N 1111 ][Ala] (AEHI) is 1.47 times higher than that of AEH. The interaction mechanism between AEHI and CO 2 was elucidated by spectroscopic analysis and molecular simulation. The water-shell layer around [Ala]–CO 2 and hydrogen-bonding were first proposed and demonstrated to be the key reasons for the phase separation. The formation of the water-shell layer expelled Eim from the rich phase and thus facilitated the proton transfer process, which not only accelerated the phase separation process but also reduced the regeneration energy consumption. After successive absorption–desorption cycles, the CO 2 uptake decreased slightly. The innovative mechanism provides important guidance for the design of excellent biphasic absorbents with good performance and low energy consumption.
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JOURNAL OF MATERIALS SCIENCE
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2024
·Vol. 59
·期 30
·13948-13960
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IF 3.5
Wang Chao,Shao Xu,Fan Tiange,Cao Xiuyun,Wang Xin,Guan Ping,Hu Xiaoling
Amyloid aggregation and oxidative stress are considered key issues in the treatment of Alzheimer's disease. Currently, few existing treatment strategies address these critical issues. An imidazolyl ionic liquid functionalized carbon dot was created in this study. Through hydrophobic interaction, the nanoparticle can attach to lysozyme and inhibit the self-assembly process brought on by hydrophobic interaction. Thioflavin T (ThT) analysis showed that CDs@IL inhibited amyloid fibril aggregation in a dose-dependent manner for a long time (inhibition efficiency of 80% and depolymerization efficiency of 74%). Circular dichroism (CD) further indicated that CDs@IL can significantly inhibit the transformation of lysozyme from α-helical structure to β -sheet structure. At the same time, CDs@IL had excellent free radical scavenging ability, which can effectively alleviate the negative effects of oxidative stress. More importantly, biological experiments proved the good biocompatibility of CDs@IL, which indicated the potential of our system as a future therapeutic platform for amyloidosis.
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IEEE SENSORS JOURNAL
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2024
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IF 4.3
Zhiyan Ma,Yaping Song,Hongran Zhao,Sen Liu,Xi Yang,Teng Fei,Tong Zhang
In this study, imidazole-based poly(ionic liquid)s (PILs) are introduced into acid-treated mesoporous silica by solid grinding and subsequent thermal polymerization methods. The purpose of treating mesoporous silica with hydrochloric acid is to increase the number of hydroxyl groups on the surface to fix more PILs. Because of the synergism of enhanced hydrophilicity and the mesoporous structure, the synthesized composite materials exhibited excellent capacities to adsorb and transport water vapor molecules and are suitable for low-humidity sensing applications. In the 7%–33% relative humidity (RH) range, the response of the as-prepared sensor reached 806% with a short response/recovery time of 8/13 s.
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JOURNAL OF MOLECULAR LIQUIDS
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2024
·
IF 5.3
Jiahong Huang,De Bai,Lin Xie,Tianqi Liu,Jichuan Zhang,Zhenye Zhu,Chengyu Wu,Jiaheng Zhang
Although paclitaxel (PTX) is a broad-spectrum anticancer drug, its low water solubility, poor bioavailability, and susceptibility to drug resistance have seriously limited its application. In recent years, studies have shown that metformin has potential anti-tumor activity. This paper reports the successful loading of PTX into metformin oleate ionic liquid ([Met][Ole] IL) micelles and [Met][Ole] IL/tween 80 (T-80) micelles. The obtained PTX-IL/T-80 micelle exhibited a good particle size (5.77 nm) and stability (Zeta potential: −51.65 ± 7.73 mV) in addition to possessing in vitro and in vivo antitumor efficacy. The inhibition rate of PTX-IL/T-80 (10 ppm) on 4 T1 cells reached 93 %. Furthermore, the results of the in vivo treatment in mice revealed that the tumor inhibition rate of PTX-IL/T-80 under a small-dose treatment (0.5 mg·kg −1 ) was 37.7 %, which was much higher than that of the PTX prodrug group (11.7 %). Consequently, PTX-IL/T-80 has a great potential for its application in cancer therapy owing to the good synergistic antitumor effect between ([Met][Ole] ionic liquid and PTX.
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JOURNAL OF MOLECULAR LIQUIDS
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2018
·
IF 4.513
Yuanchao Pei,Lihui Hao,Jie Ru,Yuling Zhao,Huiyong Wang,Guangyue Bai,Jianji Wang
Self-assembly of ionic liquids (ILs) surfactants in ILs solvents is important from the viewpoint of both scientific research and practical application because of the advantages of high ionic nature and possible application at high temperature. In this work, the aggregation behavior of long-chain ionic liquids 1-alkyl-3-methylimidazolium chloride [C n mim]Cl ( n = 12, 14, 16) and N -alkyl- N , N -dimethylethanolammonium [C n DMEA]Cl (n = 12, 14, 16) in a protic ionic liquid, ethanolammonium nitrate (EOAN), is investigated by surface tension measurements. The variation of micellization parameters with alkyl chain length and head group type of the ILs surfactants is analyzed and compared with that in water and in ethylammonium nitrate (EAN). It is found that the critical micelle concentration (cmc) values of the IL surfactants, such as [C 12 mim]Cl, in EOAN are 27 times smaller than those in EAN, and 4 times smaller than those in water. This suggests that EOAN is a better self-assembly medium for the ILs surfactants. It is also found that the contribution of head groups of the ILs surfactants to the cmc values is different in EOAN, water and EAN, while the contribution of CH 2 group in the alkyl chain of the ILs surfactants is generally independent of the solvents nature.
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INDUSTRIAL CROPS AND PRODUCTS
·
2018
·
IF 3.849
Qian Guan,Tingzhou Lei,Zhiwei Wang,Haiyan Xu,Lu Lin,Gaofeng Chen,Xueqin Li,Zijie Li
Wheat straw, a typical lignocellulosic biomass, is difficult to be liquefied because of its complex structure, which limits its further conversion to valuable products. Ionic liquid can dissolve the cellulose, which can destroy the connection of biomass components. Ionic liquids, [BMIM][HSO 4 ], [BMIM][Cl], and [HSO 3 -BMIM][HSO 4 ], were used in the liquefaction of wheat straw to produce ethyl levulinate (EL) in a one-pot reaction under mild conditions in ethanol, which served as both solvent and reactant. The highest conversion rate, 85.50%, was obtained following reaction at 200 °C for 60 min using the acidic ionic liquid 1-methyl-3-(4-sulfobutyl) imidazole bisulphate as the catalyst. Under optimal conditions, ethyl levulinate was obtained with a yield of 16.23% and its content in the liquid products was 28.11%. Without the acidic ionic liquid catalyst, the conversion rate of wheat straw and the yield of ethyl levulinate were only 22.33% and 6.23%, respectively. Of the catalysts evaluated, [HSO 3 -BMIM][HSO 4 ] was the most effective, and its recovery rate was 64.71%. This study provides a theoretical basis for the development and utilisation of low-corrosion and environment-friendly catalysts for liquefaction processes for the preparation of high-grade chemicals.
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高影响因子
TRIBOLOGY INTERNATIONAL
·
2018
·
IF 3.246
Shuai Zhang,Lin Ma,Ping Wen,Xiangyuan Ye,Rui Dong,Wenjing Sun,Mingjin Fan,Desuo Yang,Feng Zhou,Weimin Liu
This research into environmentally-friendly ionic liquids (ILs) used a series of choline amino acid ILs ([Ch][AA] ILs) prepared from choline cations and several amino acid anions. Their physicochemical and tribological properties were tested, and the results showed that [Ch][AA] ILs had good lubricating properties for different friction pairs at room temperature (RT). Their toxicities were checked against three aquatic organisms: brine shrimp, zebrafish and green algae. The results showed that they have a remarkably low toxicity. Versus traditional IL 1-butyl-3-methyl imidazolium tetrafluoroborate (L-B104), the [Ch][AA] ILs had comparable or even better physicochemical and tribological properties. More importantly, they had the environmentally features of biodegradability and non-toxicity.
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高影响因子
危险品化学品经营许可证（带存储）