CHIRALITY
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2020
·Vol. 32
·期 8
·1062-1071
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IF 2.171
Min Liu,Zhong-Qian Liu,Hai Zhu,Chao-Hong He,Ke-Jun Wu
In this paper, a novel l -glutamate based immobilized chiral ionic liquid (SBA-IL (Glu)) was prepared by chemical bonding method and applied as a solid sorbent for chiral separation of amlodipine. The performance of SBA-IL (Glu) was investigated for the absorption of ( S )-amlodipine and separation of amlodipine enantiomer. The static experiment showed that equilibrium adsorption was achieved within 80 minutes, and the saturation adsorptions capacity was 12 mg/g. The complex was then packed in a glass chromatographic column for the separation of amlodipine and the enantiomeric excess (%ee) of ( S )-amlodipine reached 24.67%. The immobilized ionic liquids exhibit good reusability, and the separation efficiency remains 18.24% after reused five times, which allows potential scale-up for the chiral separation of amlodipine.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2019
·
IF 4.561
Yanxing Zheng,Jiwei Wang,Xinqiao Tang,Lei Zhang,Fanbao Meng
Viologen-based ionic liquid crystals (VILCs) bearing viologen cations and various counter anions (Br − 1 , CsO − , PF 6 − 1 , CF 3 COO − , TsO − , and BF 4 − 1 ) were prepared using cholesterol, bromobutanoyl chloride, bipyridine and different anionic salts. The chemical structures and the SmC ⁎ phase were identified, and the effect of different anions on both liquid crystalline behavior and ferroelectric property was investigated. Melting temperatures of these VILCs with different anions were similar, but SmC*-isotropic phase transition temperatures were elevated in sequence of TsO − , CsO − , CF3COO − , PF6 − , Br − and BF4 − . They showed different polarization values changed from −9.1 to 9 nC/cm 2 as the electric field changed from −10 V to 10 V. The ferroelectric parameters ± E c , ± P r , and ± P s changed a little due to the different counter anions. The VILC with BF 4 − anion showed the optimal ferroelectric properties in these VILCs series. Unlike conventional ferroelectric liquid crystals, the VILCs displayed asymmetry in the hysteresis loops due to formation of double electrical layers in the ordered SmC ⁎ phase.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Tengling Ye,Xinyu Zhang,Jinqiao Wen,Xiaochen Sun,Dongqing He,Wenxu Li
The biological skins exhibit various fascinating visual functions, such as turning red in response to strain, whitening upon hydrogen peroxide stimulation, and changing color in accordance with the environment (octopus). Inspired by these phenomena, two kinds of multifunctional visualized electronic skin (e-skin) were designed and fabricated based on a novel poly (ionic liquid) ionogel. Herein, we reported a transparent and conductive poly (ionic liquid) ionogel (P(AAm-IL)) by photopolymerizing acrylamide (AAm) with 1-vinyl-3-butylimidazolium tetrafluoroborate (ionic liquid, IL) in ethylene glycol (EG). Interestingly, P(AAm-IL) displays a solvatochromic phenomenon, and typical hydrogen-bonding acceptor solvents like acetone, methanol, and nitromethane induce a whitening effect in it. Based on this ionogel, we fabricated multifunctional strain sensors integrated with the visualized chemical sensing ability. The discoloration mechanism of the chemical sensing was detailed studied. Furthermore, by combining the P(AAm-IL) ionogel with Lithium trifluoroethane sulfonate (LiTf), the blend P(AAm-IL)-Li ionogel exhibits enhanced stretchability (>4300 %), higher conductivity (1.44 × 10 −2 S·m −1 ), good transparency (>80 %) as well as wide operating temperature range (−20 to 80 °C). A sandwich-structured e-skin (Polypyrrole/PAAm-IL-Li/CsPbBr 3 -TPU) exhibiting both electro-optical dual response to strain was successfully fabricated. The luminescent e-skin not only exhibits highly sensitive electrical responses but also demonstrates visible fluorescence changes in response to external strain variations. These multifunctional visualized e-skins demonstrate great potential for applications in chemical environmental monitoring robotics, wearable electronic devices, and human–computer interaction.
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Batteries & Supercaps
·
2023
·
IF 5.7
Pengfei Liu,Yuxin Rao,Huasong Wang,Xue Li,Xiaomin Wang,Miaomiao Yu,Yong Li,Zhihao Yue,Fanglin Wu,Shan Fang
Graphical Electrolyte cosolvent : We employed methyl (2,2,2-trifluoroethyl) carbonate (FEMC) as a co-solvent for the [LiTFSI] 3 [Pyr 14 FSI] 4 (ILE) to enhance the cycling stability cathode materials. Experimental results indicate that the introduction of FEMC can effectively form a LiF-rich cathode electrolyte interface (CEI) layer, which effectively suppress the cracking of secondary particles and contribute to enhance the performance of the high-mass loading of Li||LiFePO 4 (LFP) cells. Ionic liquids (ILs) are promising electrolyte candidates for high-safety and stability lithium metal batteries. However, their practical application is hindered by high viscosity resulting in a poor wettability of separator and sluggish Li + transport at room temperature. Herein, a weakly-solvating solvent of methyl (2,2,2-trifluoroethyl) carbonate (FEMC) is employed as a co-solvent in non-flammable ionic-liquid electrolyte (ILE) which composed with N-butyl-N-methylpyrrolidinium bis (fluorsulfonyl) imide (Pyr 14 FSI) and bis (trifluoromethanesulfonyl) sulfonimide lithium salt (LiTFSI), effectively ameliorates the shortcomings of ILs mentioned above without sacrificing its safety character. Compared with pure ILE, the addition of FEMC can distinctly decrease the polarization voltage and electrode-electrolyte interface resistance. With the assistance of FEMC solvent, the discharge specific capacity of Li||LiFePO 4 (LFP) and Li||LiNi 0.6 Co 0.2 Mn 0.2 O 2 (NCM622) cells are significantly improved. The origin of this great improvement is contributed to the exceptionally stable and LiF-rich cathode electrolyte interphase (CEI) layer formed in this electrolyte. Additionally, Li||LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) cells exhibit a remarkable rate capability (105 mAh g −1 at 2 C rate), achieve an initial specific capacity of 202.8 mAh g −1 and outstanding capacity retention of 88.2 % over 100 cycles.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Lei Yuan,Leihao Zhang,Guilin Li,Shaojuan Zeng,Qizhou Xue,Chongyang Jiang,Xiangping Zhang
Electric-driven reduction of CO2 to high value-added chemicals is considered to be one of the most promising methods for CO2 utilization. In this work, a novel aprotic electrolyte consisting of phenoxy-nitrile bifunctional ionic liquid ([TBP][p-CN-PhO]) and acetonitrile was designed for CO2 electroreduction to oxalate, which shows the maximum Faradaic efficiency (FE) of 84.9% at −2.6 V. Importantly, a high oxalate formation rate of 233.7 μmol·cm–2·h–1 and oxalate FE of 73.9% were simultaneously achieved to break the trade-off effect at −2.8 V in the bifunctional ionic liquid electrolyte, which is also one of the state-of-the-art performances for CO2 electroreduction to oxalate. The significant performance of CO2 electroreduction was attributed to the strong interaction energies of phenoxy and nitrile groups with CO2 molecules in the bifunctional ionic liquid, which greatly facilitates CO2 activation to form CO2– radicals by a new bulk-phase pathway and then dimerizes into C2O42– at a lower energy barrier.
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RSC Advances
·
2023
·Vol. 13
·期 50
·35629-35638
·
IF 3.9
Xincheng Peng,Deqin Zhu,Jingjing Liu,Ligang Wei,Na Liu,Li Wei,Guolin Shao,Qingda An
Pretreatments with aqueous protic ionic liquid (PIL)–ethanolamine bis(oxalate) ([MEA][(HOA)(H2OA)]), combined with ultrasonic disintegration, were employed in cellulose nanofibril (CNF) production from pulp fibers. The optimization of pretreatment parameters is crucial for obtaining the maximum CNF yield. The response surface methodology was used to design the pretreatment conditions for preparing CNFs. This method consists of four factors: pretreatment time (A, 2–4 h), pretreatment temperature (B, 100–120 °C), liquid-to-solid ratio (C, 60–80 g g−1), and PIL content (D, 20–40%). The predicted CNF yield (Y) followed a quadratic multinomial regression equation represented by Y = 84.43 + 3.59A + 8.22B + 2.22C − 2.13D − 0.85AB + 2.83AC + 5.95AD + 0.43BC − 2.98BD + 4.25CD − 6.04A2 − 18.23B2 − 4.98C2 − 7.39D2. The regression equation exhibited high model fit to the experimental CNF yields as evidenced by a determination coefficient of 0.9764. Results showed that a maximum CNF yield of 86.2% was obtained in the case with the following conditions: pretreatment temperature of 112 °C, pretreatment time of 3.2 h, liquid-to-solid ratio of 83 g g−1, and PIL content of 29%. CNFs with high crystalline index (64.0%) and thermal stability (Tmax = 348 °C) were prepared. This work favors the development of low cost PIL-based pretreatment systems for the clean production of CNFs.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Yuqi Tang,Mingzhao Zhu,Junhong Chen,Xuebiao Sun,Huan Li,Zhijie Hu,Suman Li,Qian Qu,Zejun Zhang,Yuanzhu Mi
The petroleum industry produces a large volume of water-in-oil (W/O) emulsion annually, which has detrimental consequences for both the industry and the environment. Therefore, effective demulsification of these emulsions is crucial. In current work, a low-temperature demulsifier (EBTA) for W/O emulsions was synthesized using PET waste plastic as starting materials through a simple method. Chemical structure of EBTA was characterized by FT-IR and 1 H NMR. The demulsification performance was assessed using bottle-test method, and a comprehensive examination was conducted on the influence of EBTA concentration, settling time, temperature, pH value, and salinity on the demulsifying efficiency (DE). At a low temperature of 40 ℃ and a concentration of 250 mg/L, EBTA achieved a DE of 95.36% in an Emul30 emulsion, while a DE of 100% could be obtained in an Emul70 emulsion. Furthermore, EBTA demonstrated excellent tolerance for salts, acids and alkalis. In addition, the demulsification mechanism of EBTA was investigated using various techniques, such as interfacial tension (IFT), zeta potential, three-phase contact angle and coalescence time of droplets. The results revealed that EBTA had a lower IFT and was easily adsorbed on the oil–water interface. This led to the damage of the interface film and facilitated the oil–water separation. Due to the simple and safe synthesis process and remarkable demulsification performance, EBTA is a promising demulsifier for separating W/O emulsions.
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JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Baoxun Zhao,Lijun Deng,Yaming Wang,Guosheng Li,Yijun Cao
Butyl xanthate (BX) usually serve as an available collector in the sulfide mineral flotation. However, it will cause severe pollution and be harmful for living beings when discharged together with beneficiation wastewater. Adsorption, affected by sorbents structure to a great extent, is an effective strategy to treat BX-bearing wastewater. In this paper, ionic liquid-loaded fumed silica (IFS) generated by a simple process was acted as an adsorbent for removing BX from aqueous solution. The ratio of IL loaded onto silicon was about 40 %. The N elements existing in the structure of adsorbents suggested IL loaded onto silica surface successfully. The specific surface area of IFS was 65.25 m 2 /g, which was smaller than original material. And the total pore volume decreased from 36.75 to 15.22 cm 3 g −1 after modification. Different from the virginal silica barely adsorbing BX, ionic liquid (IL) loaded silica had large uptake capacity up to 202.84 mg/g under the combined effect of functional groups modified in the silica particle and the porous structure of nanomaterial. The adsorption kinetics and isotherms are followed with the pseudo-second-order model and Langmuir model, respectively. And the functional groups, charge of adsorbent were analyzed to reveal approaching mechanism. This paper provides an alternative for xanthate and other organic contaminants treatment.
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JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
·
2023
·
IF 5
Jie Zhou,Shengnan Li,Jin Zhang,Fusui Luo,Yiwen Sun,Min Guan,Huili Ma,Qian Liu
Oral absorption and room temperature storage remain two major challenges limiting the bioavailability of recombinant human growth hormone (rhGH) due to the need to overcome the unfavorable gastrointestinal environment and resist temperature effects on rhGH structure, Therefore, we designed a multifunctional nanoplatform to address both problems simultaneously. The carrier consists of PLGA, ionic liquid (IL) and deoxycholic acid (DCA). In this nanosystem, IL acts as a green non-toxic solvent and helps the nanoparticles to open tight junctions between cells, and acts as a room temperature protectant to improve the room temperature stability of rhGH. Endogenous DCA as a ligand increases intestinal absorption of nanoparticles through receptor-mediated endocytosis. The nanoparticles have the following advantages: 1) Protects rhGH in the gastrointestinal tract from being degraded by gastric acid and proteases . 2) The absorption of rhGH in intestinal tract was increased and its bioavailability was enhanced. 3) The storage time of rhGH at room temperature was prolonged. These materials are cheap, readily available and easily synthesized and these studies provide a basis for the clinical application of rhGH.
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EUROPEAN POLYMER JOURNAL
·
2023
·
IF 6
Chuanyun Zhao,Chenyang Zhang,Peng Wang,Ziwei Chen,Yuhang Wang,Jiadeng Zhu,Chunxia Gao,Qiang Gao
Wet-spinning technology plays an essential role in the development of wearable electronics. Poly(3,4-ethylene dioxythiophene): poly(styrene sulfonate) (PEDOT: PSS) fibers have been widely investigated in this field due to their advantages of being environment-friendly and low-cost. They are mainly wet-spun from a coagulation bath containing ethanol and water with additional metal salts. However, the conductivity of PEDOT: PSS fibers spun by this method is low. Here, we propose a novel coagulation bath made of ionic liquid (IL), ethanol, and water, and the resultant PEDOT: PSS fibers could achieve a conductivity of 118.3 S·cm −1 . Furthermore, the fiber-shaped supercapacitor prepared by such PEDOT: PSS/IL fibers reveals an optimal capacitance retention rate of 97 % even after 10,000 cycles, and the capacitance loss of the supercapacitor is only 7 % at −20 ℃. The sensor derived from the PEDOT: PSS/IL fibers has superb sensing capability, indicating their promising applications for wearable electronics.
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JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Xuening Feng,Huanyu Liu,Hanjun Liu,Xuebin Jiang,Liwei Shen,Yuqi Tang,Qian Qu,Dong Xiang,Xuemin Yan,Yuanzhu Mi
A new type of ionic liquid demulsifier with double hydrophilic and hydrophobic chains (HDEA-TFA) was synthesized through the quaternization and replacement reaction. The chemical structure of HDEA-TFA was identified by 1 H NMR and FT-IR. It could be applied as an excellent demulsifier for two water-in-crude oil (W/O) emulsions (m water :m oil = 70:30 and m water :m oil = 30:70). The effect of demulsification conditions such as concentration of HDEA-TFA, settling time, demulsification temperature, pH value and salinity on the demulsifying efficiency (DE) of the W/O emulsions were discussed in detail. The results showed that the demulsifying efficiency (DE) of HDEA-TFA in the two W/O emulsions could reach 100 % with the concentration of 500 mg/L at 60 °C within 120 min. Also, HDEA-TFA had excellent acidic, alkaline and salt resistance. Moreover, several commercial demulsifiers were compared to evaluate the demulsifying performance of HDEA-TFA. The dynamic interfacial tension (IFT), surface tension (ST), three-phase contact angle (CA), elasticity modulus (EM) and zeta potential were used to investigate the demulsifying mechanism. The current study developed a new type of ionic liquid demulsifier with excellent performance and provided a reference for the research of demulsification mechanism.
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高影响因子
EUROPEAN POLYMER JOURNAL
·
2023
·
IF 6
Wenxin Xu,Manyue Zhang,Wenzhen Du,Guixia Ling,Yue Yuan,Peng Zhang
Immediate hemostatic control and anti-infection are critical for wounds and have received much attention in the pharmacological fields. Whereas the development of effective wound dressings has faced the challenge with the desired combination of properties, including antimicrobial agent selection, adhesion to tissue, hemostatic performance, biocompatibility, ease of use, etc. It is known that hyaluronic acid (HA) derivatives are beneficial to promoting coagulation and wound healing, and have many functional groups in the structure, which are easy to be chemically modified. ε-Poly-(L-lysine) (ε-PL) has long-acting and broad-spectrum antibacterial properties and can bind to the aldehyde group by Schiff base reaction. Choline-based bio-ionic liquids (Bio-ILs) are structural precursors of phospholipid bilayers in cell membranes, and the adhesive strength of the polymers could be improved by conjugated with them. In addition, the humid environment also facilitates wound healing. Herein, we developed a novel wound dressing, which was a multifunctional hydrogel interwoven with two networks, one network was constructed from conjugation of Bio-ILs with methacrylated hyaluronic acid (MeHA) and self-coupling of MeHA, and the other network was formed by oxidized hyaluronic acid (OHA) and ε-PL via Schiff base reaction. In vitro studies indicated that hydrogels exhibited a three-dimensional porous structure with good swelling, antibacterial and biocompatibility properties. In addition, the rat tail amputation and wound healing experiments expressed that hydrogels had the ability of rapid hemostasis and promoting wound healing. In conclusion, Bio-IL/MeHA/OHA/ε-PL hydrogel is a naturally-derived, biocompatible and promising wound dressing.
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危险品化学品经营许可证（带存储）