CATALYSIS LETTERS
·
2019
·Vol. 150
·期 5
·1373-1388
·
IF 2.372
Ji Qinghua,Yu Xiaojie,Yagoub Abu El-Gasim A.,Li Mo,Fakayode Olugbenga Abiola,Yan Dong,Zhou Cunshan,Chen Li
Abstract The purpose of this study was to efficiently convert the sugary food waste (SFW) to 5-hydroxymethylfurfural (5-HMF) by ultrasound-[Bmim]Cl pretreatment in ionic liquids (ILs)-ion exchange resin system. The effect of ultrasonic pretreatment on SFW and the effect of ultrasonic frequency, ILs, acid resin and catalyst load on SFW conversion were studied. The kinetic curve and the relationship between products and intermediates were studied. In addition, the structure of SFW was also studied by FT-IR and SEM. The results indicated ultrasound-[Bmim]Cl pretreatment can significantly promote the dissolution of cellulose in SFW, and the optimal ultrasonic frequency, solvent and catalyst were 20 + 40 + 60 kHz, [Bmim]Cl and D001-cc resin, respectively; under the best reaction conditions, the maximum 5-HMF yields from the orange and apple wastes were 42.15 and 44.66 mol%, respectively. The kinetic studies showed that the early stage of 100 and 120 °C was mainly the hydrolysis reaction, and late stage was mainly isomerization and dehydration reaction; the early stage of 140 and 160 °C was a rapid hydrolysis and dehydration reaction, and the late stage was mainly the rehydration reaction of 5-HMF. The relationship between the intermediate precursors and 5-HMF showed that the rates of formation and rehydration of 5-HMF increased with the increase in temperature, and the formation reaction was mainly concentrated in zone II. The FT-IR and SEM results of degradation products showed that cellulose in SFW was more easily hydrolyzed at high temperature and long time. Graphic Abstract
研究领域:
化学工程
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环境科学
·
催化
·
废物管理
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产品关联
DOI
高影响因子
HIGH PERFORMANCE POLYMERS
·
2021
·
IF 2.161
Yuting Ouyang,Qiu Zhang,Xiukun Liu,Ruan Hong,Xu Xu,Shaorong Lu,Yuqi Li
Different ionic liquid modified graphene nanosheets (IG) were induced into polyimide (PI) to improve the tribological, thermal, and mechanical properties of shape memory IG/PI composites. The results demonstrated that when using 1-aminoethyl-3-methylimidazole bromide to modify graphene nanosheets (IG-1), the laser-driven shape recovery rate of IG-1/PI composites (IGPI-1) reached 73.02%, which was 49.36% higher than that of pure PI. In addition, the IGPI-1 composite materials reached the maximum shape recovery rate within 15 s. Additionally, under dry sliding, the addition of IG can significantly improve the tribological properties of composite materials. IGPI-1 exhibited the best self-lubricating properties. Compared with pure PI, the friction coefficient (0.19) and wear rate (2.62 × 10–5) mm3/Nm) were reduced by 44.1% and 24.2%, respectively, and the T10% of IGPI-1 increased by 32.2°C. The Tg of IGPI-1 reached 256.5°C, which was 8.4°C higher than that of pure PI. In addition, the tensile strength and modulus of IGPI-1 reached 82.3 MPa and 1.18 GPa, which were significantly increased by 33.6% and 29.8%, respectively, compared with pure PI. We hope that this work will be helpful for the preparation of shape memory materials with excellent tribological, thermal, and mechanical properties.
研究领域:
材料科学
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复合材料
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摩擦学
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高分子化学
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产品关联
DOI
高影响因子
Polymer Chemistry
·
2016
·Vol. 7
·期 6
·1330-1336
·
IF 5.687
Fei Chen,Jiangna Guo,Dan Xu,Feng Yan
Thermo- and pH-responsive poly(ionic liquid) (PIL) membranes were synthesized via photo-crosslinking of imidazolium type IL monomers with acrylic acid (AA), N-isopropylacrylamide (NIPAM), and acrylonitrile (AN). The transmittance of the prepared PIL membranes was determined by the concentration of AA units and the hydrophobicity of PIL counter anions, and could be altered in response to temperature and (or) pH. The shape deformation of the PIL membranes can be reversibly tuned by changing the pH value of aqueous solutions or gas atmospheres (NH3/HCl). The dual-responsive PIL membranes prepared in this work can act as a soft actuator, and would have potential applications in advanced sensors and functional materials for inscription of information.
研究领域:
高分子化学
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智能材料
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响应性聚合物
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生物医用材料
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功能材料
✓ 已验证
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2019
·
IF 3.074
Qingquan Tang,Weiyi Zhang,Jiayin Yuan,Qiang Zhao
Charged cyclic polymers, e.g. cyclic DNAs and polypeptides , play enabling roles in organisms, but their synthesis was challenging due to the well-known “polyelectrolyte effect”. To tackle the challenge, we developed a templated method to synthesize a library of imidazolium and pyridinium based cyclic poly(ionic liquid)s. Cyclic templates, cyclic polyimidazole and poly(2-pyridine), were synthesized first through ring-closure method by light-induced Diels−Alder click reaction. Through quaternization of cyclic templates followed by anion metathesis, the cyclic poly(ionic liquid)s were synthesized, which paired with varied counter anions.
研究领域:
高分子化学
·
有机合成
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功能材料
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离子液体
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生物医用材料
✓ 已验证
DOI
高影响因子
PLoS One
·
2026
·Vol. 21
·期 4
·e0344789
·
IF 2.8
Xiaoting Ma,Yangzhe Zhou,Ke Jiang,Yuqi Wen
The increasing worldwide need for analgesics, along with patients’ aversion to injectable anesthetics and limited compliance, highlights the necessity for noninvasive local anesthesia. However, the skin barrier poses a significant obstacle to the efficient transdermal administration of anesthetics. In this study, we synthesized a new ionic liquid (IL), tetradecylphosphonium hexanoate, by mixing sodium hexanoate and CYPHOS 101 at equimolar ratios. We systematically evaluated the capacity of this IL to improve the transdermal transfer of lidocaine hydrochloride through in vitro skin permeation tests and cytotoxicity investigations in HaCaT cells. The IL significantly enhanced the percutaneous absorption of lidocaine in a concentration-dependent manner. At 80 mM, the permeation efficiency increased by approximately 1.5 times compared with the control group, resulting in a significantly reduced onset time for topical anesthesia. While IL showed minimal cytotoxicity at low concentrations, higher concentrations were linked to increased cytotoxicity. ILs can effectively enhance the permeation of transdermal lidocaine. The ease of synthesizing ILs, their adjustable properties, and good compatibility make them promising for creating advanced topical anesthetics and broadening transdermal drug delivery applications.
✓ 已验证
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Bingbing Zhang,Hang Xu,Fengmin Wu,Yuan Zhao,Xiaoyan Gao
The metal catalytic active centers in solid catalysts containing metal-based polymeric ionic liquids exist in an ionic state, significantly enhancing their catalytic efficiency. In this study, a desulfurization catalyst, vinyl-3-butylimidazolium manganese chloride ionic liquid, is synthesized through the polymerization of approximately six monomers. This desulfurization catalyst is combined with the oxidant potassium peroxymonosulfate (PMS) and the extractant acetonitrile (ACN) to remove dibenzothiophene (DBT) from octane. In a reaction involving 20 mg of the catalyst, 1 g of PMS, 1 g of ACN, and 6 g of simulated oil containing 600 ppm DBT at 20 °C, the DBT removal efficiency reaches 99%. Furthermore, after six cycles of use, the desulfurization rate remains as high as 90%. GC-MS analysis reveals that the desulfurization products are DBTO and DBTO2. The oxidation mechanism primarily involves Mn2+ in the catalyst losing electrons to activate HSO5−, generating sulfate radicals (˙SO4−), which oxidize the sulfur atom in DBT. HSO5− also facilitates the cyclic transformation among Mn2+, Mn3+, and Mn4+. Based on the desulfurization mechanism, the reaction kinetics for this catalytic oxidative desulfurization process are established. This desulfurization process is a zero-order reaction, with a reaction rate constant between Mn2+ and HSO5− of 0.09173 ppm mg−1 min−1 g−1, and the activation energy for catalytic desulfurization is 35.62 kJ mol−1.
研究领域:
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2011
·
IF 2.072
Weina Liu,Yucui Hou,Weize Wu,Shuhang Ren,Yan Jing,Baogang Zhang
An extended study on the solubility of glucose in ionic liquid (IL) + antisolvent mixtures has been performed to find a way to separate glucose from ILs. These ILs, commonly used in cellulose conversion processes, are based on combination of cations of 1-methyl-3-alkylimidazolium and anions of chloride, bromide, acetate, and hydrogen sulfate. Effects of temperatures, antisolvents, ILs, mass ratios of antisolvent to IL, and water contents on the solubility of glucose have been investigated in this work. The results demonstrate that the solubility of glucose increases with decreasing mass ratio of antisolvent to IL and elevating temperatures. The solubility of glucose in IL + ethanol mixtures increases in the following order: [emim][Br], [bmim][Cl], [hmim][HSO4], [bmim][CH3COO], and [emim] [CH3COO]. The addition of water can increase the solubility of glucose in IL + antisolvent mixtures. Ethanol can be selected as a better antisolvent to separate glucose from IL than methanol, acetone, and acetonitrile.
研究领域:
化学工程
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材料科学
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生物技术
✓ 已验证
产品关联
DOI
高影响因子
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
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2022
·
IF 11.75
Jie Tian,Baoyou Liu
In the past a few years, ionic liquids (ILs) have attracted enormous interest from scholars and researchers in the field of NH3 separation due to their unique properties, such as negligible vapor pressure, high chemical and thermal stability, tunable acidity and selective dissolubility for gases. In this paper, the structure and NH3 solubility of pure ILs, supported ILs and IL analogues were analyzed and summarized. Moreover, the intrinsic mechanisms of NH3 capture by ILs are analyzed based on molecular simulation and experimental characterization. The transport properties, prediction model, process optimization, influence factors and economic analysis are discussed which provides basic and valuable information for engineering amplification and industrial application of ILs. Furthermore, the future research trends and development potentials are also prospected from multiple perspectives.
研究领域:
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2014
·Vol. 30
·期 2
·293-296
·
IF 1.119
Zhang Yinxu,Mao Xinbiao,Ren Shuying,Ma Chunan
Ionic liquid, 1-butyl-3-methylimidazolium acetate(BMImAc), was used in the electrochemical reduction of nitrobenzene. The electro-reduction of nitrobenzene on platinum electrode was studied by cyclic voltammetry(CV), in situ Fourier transform infrared(FTIR) spectroscopy and constant-potential electrolysis. The experimental results show that electrochemical reduction process of nitrobenzene was controlled by diffusion, the main reduction product was azobenzen at −1.45 V, and the influences of scan rate and temperature on the electrochemical behaviors were obviously. A reduction mechanism of nitrobenzene in an ionic liquid was a probable ‘nitrobenzene→nitroso-benzene→azobenzene→aniline’ main reductive reaction route.
研究领域:
化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 59
·37443-37448
·
IF 3.361
Huiting Wang,Hairan Zhang,Ling Zhang,Shibo Zhao,Yaxian Chen,Yu Wan,Qian Zhang,Lixin Xia
An ionic liquid (IL)-based liposome was utilized as a substrate to construct a SERS platform. The isotropy of the IL outer surface together with its ion-exchange property led to the array-like growth of Au nanoparticles (NPs), generating hot-spots and resulting in anionic probes being present on the hot-spot regions. The simultaneous strategy of enrichment and localization endowed the platform with ability to detect trace amounts of anionic probes.
研究领域:
分析化学
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纳米技术
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生物医学
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产品关联
DOI
PubMed
高影响因子
SOLID STATE IONICS
·
2022
·
IF 3.699
Huizhe Niu,Nan Zhang,Minling Ding,Tongtong Hou,Donghao Zhang,Le Wang,Ping Guan,Xiaoling Hu
Poly(ionic liquids) (PILs) electrolytes combine the advantages of ionic liquids and polymers and have been widely studied to boost the performance of lithium batteries . However, one main problem that most of PILs electrolytes encounter is the tradeoff between mechanical integrity and high ionic conductivity . Therefore, elevating ionic conductivity is still a problem to be solved urgently. In this work, ether group-functionalized PIL is synthesized and an ionic liquid (IL) decorated metal−organic framework (MOF) filler IL@UIO-66 is prepared. Subsequently, one composite polymer electrolytes (MCPEs) involving IL@UIO-66 and PIL are built via solution-casting approach. The as-prepared optimal MCPE membranes with 10% IL@UIO-66 (MCPE-10%) express higher ionic conductivity as high as 2.06 × 10 −4 S cm −1 and larger lithium ion transference number of 0.49 at 30 °C than the electrolytes without filler (CPE). Comparing with CPE, the thermal stability of MCPE-10% is significantly improved to 300 °C by IL@UIO-66 and the electrochemical stability of MCPE-10% with an oxidation potential of 5.10 V vs. Li + /Li is almost unaffected. Besides, the interfacial stability between MCPE-10% and lithium electrode is improved. The assembled LiFePO 4 /MCPE-10%/Li cells show a promising rate and cycle performance at 25 °C. They show an initial discharge capacity of 123 mAh g −1 at current density of 0.5C, and their discharge capacity retention is up to 95% after 100 cycles with coulombic efficiency higher than 99%.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
Polymer Chemistry
·
2014
·Vol. 5
·期 19
·5578-5590
·
IF 5.368
Wenlong Li,Peiyi Wu
Dynamic thermal phase transition behavior of a well-defined thermoresponsive ionic liquid (IL), [P4,4,4,4][SS], and its polymer, poly(ionic liquid) (PIL), P[P4,4,4,4][SS], synthesized by modified free radical polymerization was investigated by means of DSC, turbidity, temperature-variable 1H NMR, FT-IR spectroscopy measurements, in combination with perturbation correlation moving window (PCMW) and two-dimensional correlation (2Dcos) analysis. Obvious distinction was observed between the LCST of monomer and polymer solutions indicating their largely different dynamic transition process. Further studies revealed that the aggregation of [P4,4,4,4][SS] is mainly driven by the synergetic variations of cations and anions while the separation process of the P[P4,4,4,4][SS] solution is found to be dominated by conformation changes of anions. Finally, 2Dcos was employed to elucidate the sequence order of chemical group motion during heating. It is concluded that synergetic variations of cations and anions in the [P4,4,4,4][SS] solution resulted in the randomly aggregated structure of globules during separation. In contrast, in the P[P4,4,4,4][SS] solution, anions of repeated units tend to be wrapped into the aggregated globules while cations would distribute at the periphery of globules after transition. Additionally, several unusual phenomena were also interpreted, such as the different varying tendency in LCST of monomer and polymer solutions with increasing concentration, their distinction in the final transmittance and their rather different LCST at the same concentration.
研究领域:
高分子化学
·
物理化学
·
材料科学
·
温敏材料
·
光谱分析
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）