COLLOIDS AND SURFACES B-BIOINTERFACES
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2020
·
IF 4.389
Yongqiang Zhang,Yingying Cao,Xiangzhan Meng,Chunshan Li,Hui Wang,Suojiang Zhang
A microemulsion system based on ionic liquid (IL) and deep eutectic compound was proposed to improve the transdermal delivery of artemisinin. Deep eutectic lidocaine ibuprofen (Lid·Ibu) was selected as the oil phase, and the imidazolium ionic liquid, 1-hydroxyethyl-3-methylimidazolium chloride ([HOEmim]Cl), was incorporated into the aqueous phase as a transdermal enhancer. The ingredients for the microemulsion in this study were selected, and their ratios were optimized. The optimal microemulsion carrier was composed of 45 wt% of water phase, 45 wt% surfactant phase (containing Tween-80, Span-20, and ethanol (co-surfactant) with the weight ratio of 1:1:1), and 10 wt% Lid·Ibu as the oil phase with artemisinin loading of 1.0 wt% (all the ratios were based on the total weight of microemulsion). Physical properties of this microemulsion, including particle size (41.95 ± 0.85 nm), viscosity (26.65 ± 0.13 mPa·s) and density (1.02 g/cm 3 ), were measured. In-vitro transdermal assay showed a remarkable enhancement of artemisinin transport through the skin, with the permeation flux being 3-fold of the value for iso propyl myristate system in 6 h. The impact of IL-based microemulsion (ILME) on stratum corneum (SC) was investigated by DSC, ATR-FTIR and AFM, which unveiled that the ILME possesses the ability of reducing the SC barrier by disrupting the regular arrangement of keratin, resulting in enhancement of transdermal delivery of artemisinin. This current work suggested that the microemulsion proposed here had an excellent capability to promote the transdermal delivery of artemisinin, which might also be a promising vehicle for the skin delivery of other hydrophobic natural drugs.
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PubMed
高影响因子
GREEN CHEMISTRY
·
2020
·Vol. 22
·期 6
·1944-1951
·
IF 9.48
Anlian Zhu,Wanlu Feng,Zhiyong Li,Shuang Cheng,Qianhan Chen,Dongshuang Fan,Yuanyang Guo,Lingjun Li,Jianji Wang
The great challenges of modern industry and the environment make it important to develop sustainable energy resources with low cost. In this work, a cleaner enzymatic procedure for biodiesel production was developed through the utilization of a biocompatible and hydrophilic ionic liquid [Choline][H2PO4]. This ionic liquid can be synthesized from cheap raw materials through simple neutralization procedures, and it has been proved to be well biocompatible. The utilization of this ionic liquid in Novozym 435 catalyzed biodiesel production makes the reaction and work-up procedures very simple, because its hydrophilicity can lead to the implementation of a pseudo homogeneous reaction and then heterogeneous separation. Various oil resources such as triolein, sunflower oil and castor oil can all be converted to biodiesels with high yields. After the completion of reaction, both the ionic liquid and Novozym 435 can be recycled and reutilized for at least five cycles without a significant activity decrease. In addition, this reaction system can be conveniently scaled up to the multi-gram level with high efficiency and feasible separation. Overall, the above mentioned benefits make this ionic liquid based enzymatic system cleaner for the production of biodiesel and promising for further industrial applications.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2020
·
IF 7.183
Yun Yang,Qian Wu,Dong Wang,Chenchong Ma,Zheng Chen,Qinting Su,Caizhen Zhu,Cuihua Li
The composite solid electrolytes (CSEs) inherits the high safety of the inorganic solid electrolyte and the easy processing of the organic polymer electrolyte , thereby exhibiting a broad application prospect. However, the performance of the CSE was hard to realizing its practical application in lithium metal batteries . Herein, the significant impact of CSE performance brought about by the addition of ionic liquids was studied and summarized: significantly increase ionic conductivity ; constructing a viscoelastic interface between electrode and electrolyte to reduce the interface impedance; forming a stable and LiF-rich SEI at the negative electrode to inhibit the growth of lithium dendrites ; wetting the LiFePO 4 porous cathode. The LiFePO 4 /CSE-60/Li battery displays high initial discharge specific capacity of 158.2 mAh g −1 and a capacity retention of 86.3% after 400 cycles at 1 C at 55 °C, and with coulombic efficiency of 99.7%. The surface of the lithium metal anode after long-term cycling exhibits to dendrite-free morphology. This research highlights the critical role that ionic liquids play in improving the performance of CSEs and will shed light on designing CSEs for LMB practical applications.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2020
·
IF 4.939
Kai Li,Jia Chen,Mingming Guan,Shaokun Tang
The “trade-off” effect between hydroxide conductivity and dimensional stability is challenging issue for anion exchange membrane fuel cells (AEMFCs). In this study, the framework of UiO-66-NH 2 is for the first time applied to anion exchange membranes (AEMs). The robust pore walls of UiO-66-NH 2 with mechanical and structural durabilities protect the membrane from the excessive swelling effects (a swelling ratio of 7%). In addition, the framework of UiO-66-NH 2 is directly modified into (UiO-66-NH 2 ) + Cl − as hydroxide conduction channels by anion stripping for the first time. And we construct well-organized ion nanochannels by the in-situ self-assembly of N,N,N′,N' -tetramethyl-1,6-hexanediamine (TMHDA) and allyl bromide within the highly ordered pores of (UiO-66-NH 2 ) + Cl − . The obtained QA@(UiO-66-NH 2 ) + Cl − then incorporated into pristine membrane (QAPPO) to fabricate the novel multi-channel AEMs. The hydroxide conductivity of QA@(UiO-66-NH 2 ) + Cl − /PPO is up to 123 mS⋅cm −1 at 80 °C, which is greatly improved compared to QAPPO pristine membrane.
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高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2021
·Vol. 306
·期 12
·2100560
·
IF 4.367
Xiaojie Lv,Jingjing Wang,Danning Ding,Jiaojiao Liang,Zhongzheng Zhao,Yuan Liang,Zhenfei Zhang,Chunlin Ye,Yuwei Chen,Peng Wei,Yanping Wang,Yong He,Yumin Xia
In this study, a kind of imidazole type poly(ionic liquid) ([PEP-MIM]Cl) is synthesized, which can disperse carbon effectively. [PEP-MIM]Cl is used as an intermediate to coat carbon on the poly(acrylic acid)(PAA -co- MBA) via ion exchange to obtain conductive polymer composite (CPC). A series of characterizations are performed. Experiments show that carbon can be coated on the PAA -co- MBA uniformly, and compared with using carbon as filler, this method requires less carbon to achieve good conductive performance. The carbon layer on the polymer's surface is enriched via the swelling-shrinking properties of PAA -co- MBA according to the SEM images. Furthermore, in combination with 3D printing technology, PAA -co- MBA can be designed into different shapes to achieve various functions such as pressure-sensing element. Finally, a new type of CPC named carbon clad polymeric laminate (CCPL) is prepared by using the carbon coating method and 3D printing technology. It has the potential to replace copper clad laminate (CCL) and printed circuit board (PCB), to a certain extent. This technology expands the preparation method and application of the CPC such as flexible and wearable conductive fabrics.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2021
·Vol. 138
·期 42
·51253
·
IF 3.125
Hao Wang,Yihang Gao,Xuhong Jia,Quanyi Liu
Present polymer inhibitors depend on a major inhibitory group to restrain bentonite hydration, and monomer design is concerned to improve the inhibition and stability through complex copolymerization. Conveniently, a homopolymer (PIL-NH 2 ) that contained primary amine and cationic imidazolium as bi-functional groups was proposed, aiming to provide two synergistic inhibitory modes. Comprehensive methods were conducted to characterize the chemical structure and inhibitory performance of PIL-NH 2 . The ζ potential absolute value of bentonite suspension was decreased by PIL-NH 2 from 28.7–33.3 mV to 4–7 mV, and the increment of bentonite particle size d 50 was observable from 1.83892 μm to over 200 μm. With water squeezed out, the lattice spacing d 001 of hydrated bentonite was reduced from 1.9070 to 1.2683 nm due to PIL-NH 2 intercalation. The ESEM images revealed that inhibited bentonite showed a tight structure with classical dehydration phenomenon, and the hydrogen bond between PIL-NH 2 and bentonite was further confirmed according to the FT-IR result. In mechanism analysis, the electrostatic attraction and hydrogen bond existed simultaneously for PIL-NH 2 to adsorb bentonite. The two adsorption modes from bi-functional groups were synergistic to improve inhibition remarkably. PIL-NH 2 maintained high performance during the whole hydration process, including crystalline hydration, osmotic hydration, and hydrated dispersion.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Fan Liu,Yao Shen,Li Shen,Yuchi Zhang,Weiqi Chen,Qiaoli Wang,Sujing Li,Shihan Zhang,Wei Li
A novel sustainable amino functionalized ionic liquid (AFIL) organic solution of tetraethylene pentamine 5-amino-4-imidazolecarboxamide/n-propanol/ethylene glycol ([TEPAH][AICA]/NPA/EG) was proposed for CO 2 capture to reduce the regeneration energy consumption. The solution had an efficient absorption loading of 1.78 mol·mol −1 , and it still maintained a good recyclability after 10 cycles (regeneration efficiency > 88%). Under this condition, the regeneration energy consumption was 2.30 GJ·t −1 CO 2 , which was 39.5% lower than that of MEA/water. The absorption and desorption mechanisms were investigated by 13 C NMR. For CO 2 absorption reaction, N atom of [AICA] − combined with CO 2 to form the carbamate directly, while other amino groups followed the zwitterion formation and deprotonation. Then some carbamates combined with alcohol to form the alkyl carbonates. For CO 2 desorption reaction, both the alkyl carbonates and carbamates combined with AFILH + to decompose, but the alkyl carbonates decomposed completely and a small amount of carbamates remained, indicating that carbonate was easier to decompose than carbamate. The novel [TEPAH][AICA]/NPA/EG solution with low energy consumption and good recyclability, which provides a sustainable strategy for advancing carbon capture technologies.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Zichen Zhang,Hengjun Gai,Qun Li,Bingxiao Feng,Meng Xiao,Tingting Huang,Hongbing Song
In this work, N-rich ionic liquid based on 1,3,5-triimidazole triazine was used to construct poly(ionic liquid) (PIL) through free radical polymerization, and support palladium nanoparticles (Pd NPs), which were used in the catalytic hydrogenation of nitrobenzene. The resulting N-rich PIL had a good dispersion effect and ultrafine Pd NPs as shown by SEM and TEM, thereby significantly enhancing the stability of the loaded metal NPs. The XPS results indicated that the metal-support interaction improved the catalytic performance of the catalyst. In particular, the effects of different anions (Tf 2 N - , PF 6 - , and Cl - ) on the PILs were investigated, and the results showed that the Tf 2 N anion exhibited the best catalytic effect on the hydrogenation of nitrobenzene. Furthermore, density functional theory calculation confirmed that anions played a key role in activating the substrate in the hydrogenation of nitrobenzene. The corresponding results were consistent with the experimental results, which provided reference and research for the application of PILs in the future.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Qi Fan,Ruizheng Zhao,Mengjiao Yi,Ping Qi,Chunxiao Chai,Hao Ying,Jingcheng Hao
Stemming from its unique structure and properties, Ti 3 C 2 -MXenes have stood out from the crowd of electrode materials due to effectively ameliorating imperfections of common ones for excellent energy storage. However, a major stumbling block in the further development of MXene-based supercapacitors is the inherent low capacities caused by severe restacking of nanosheets. Herein, we develop a simple, effective and innovative strategy, namely, introducing both polymerized polypyrrole (PPy) particles and ionic liquid (ILs)-based microemulsion particles as “dual spacers”, to fabricate functionalized Ti 3 C 2 -MXene composite films for high-performance and wide-temperature application in supercapacitors. The PPy particles acting as one “spacer” circumvent restacking issues of MXene nanosheets, while contribute to desirable capacitance of the hybrid material. ILs-based microemulsions spontaneously adsorbing onto PPy-Ti 3 C 2 T x nanosheets are conceived to be one more liquid “spacer” for fast ion diffusion kinetics and absent electrolyte imbibition steps, which is rarely reported in previous research for MXene-based electrode materials. These features endow the composite films with excellent specific capacitance, rate capability and cycling stability between 4 °C and 50 °C. At room temperature, the symmetric supercapacitor device based on the composite films delivers a maximum gravimetric energy density of 31.2 Wh kg −1 (at 1030.4 W kg −1 ) and reserves 91% of the initial specific capacitance with a coulombic efficiency of 91% after 2000 cycles. All these impressive results substantiate that the composite films prepared by ingenious structure design showcase huge potentials in advanced MXene-based supercapacitors using various ionic liquid electrolytes.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Wenbo Chen,Zhenguo Zhang,Cancan Yang,Jing Liu,Hongcheng Shen,Kai Yang,Zhe Wang
In this work, we fabricated PIM-based mixed matrix membranes (MMMs) containing MOF-801/ionic liquid nanocomposites to enhance CO 2 separation performance of pure polymer membranes. All membranes and MOF-801/ionic liquid nanocomposites were prepared by solution casting method and wet impregnation, respectively. The samples were analyzed by SEM, XRD , FTIR, TGA and Nitrogen adsorption-desorption measurements. The nanocomposites are composed of metal-organic framework (MOF) MOF-801 and ionic liquid (IL) adsorption capacity. MOF-801 can well control the dispersion of IL in the polymer matrix , which is conducive to exposing more active sites in the nanocomposites to improve the CO 2 adsorption selectivity of MOF-801/ionic liquid nanocomposites. At the same time, the porous structure of nanocomposites also enhances the gas adsorption and diffusion, thereby improving the gas separation performance. Compared with pure PIM-1 membranes, the CO 2 permeability and CO 2 /N 2 selectivity of IL@MOF/PIM-5% MMMs was increased by 129% and 45% (CO 2 = 9420 Barrer, CO 2 /N 2 = 29）, respectively. Compared with MOF-801/PIM-1 MMMs, the permeability of CO 2 decreased slightly but the selectivity of CO 2 /N 2 increased from 27 to 29. The aging test showed that the CO 2 permeability of MMMs could remain above 70% after 90 days. The anti-plasticization performance of MMMs has also been significantly improved. The CO 2 separation performance of IL@MOF/PIM-5% MMMs significantly exceeded the 2008 Robeson upper bound, showing excellent gas separation performance and working stability.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Zheng Zhou,Xin Ju,Yuyang Zhou,Yinghui Mu,Liangzhi Li
Enzyme-loaded microgels (μ-Gelzymes) have gained increasing attention for their facile fabrication, versatile applicability, and fine controllability. Herein, a series of poly(N-isopropylacrylamide) (PNIPAM)-based μ-Gelzymes (P-C) with a tunable surface potential were prepared to improve the cellulase biocatalytic effect. The P-C showed better cellulose affinity than free cellulase, highly reducing its nonproductive binding onto lignin, while the Langmuir adsorption affinity indexes (K) of P-C for cellulose and lignin were 1.19 and 0.34 g/L, whereas those of free cellulase were 0.44 and 3.92 g/L, respectively. Moreover, the biomass synergistic pretreatment with 1-ethyl-3-methylimidazolium acetate ([EMIM]OAc) and choline acetate ([Ch]OAc) resulted in an almost equal ζ-potential on lignin, cellulose, and hemicellulose. Microcrystalline cellulose (MCC) and bagasse (BC) substrate conversions achieved by P-C were 19.8 and 12.1% higher than those with free cellulase under 3% [Ch]OAc + 7% [EMIM]OAc in situ saccharification. The P-C ζ-potential and biomass glucose production demonstrated that the more the electroneutrality on P-C, the higher the glucose generation, suggesting that biomass saccharification can be controlled by adjusting the surface charge on μ-Gelzymes.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Qi Li,Shizhu Song,Yanqing Wang
Ultrafine Pt nanoparticles (NPs) homogeneously anchored on hollow carbon nanoshells (PtIL-HCNs) via a wet-chemistry reduction of a new type of imidazolium-[PtCl6]2– ionic liquid (IL) are reported. Confined [PtCl6]2– in IL molecules effectively prevents the growth and spontaneous aggregation of the Pt NPs due to the electrochemical neutrality of the IL, resulting in a homogeneously dispersed state of Pt NPs. The PtIL-HCNs with a Pt loading of 22 wt % outperform the commercial Pt/C (40 wt %) in terms of oxygen reduction reaction (ORR) activity and durability. The half-wave potential of PtIL-HCNs is 51 mV more positive than that of the commercial Pt/C in 0.1 M HClO4. An electrochemical surface area of 97 m2 mg–1 Pt and specific mass activity of 475 mA mg–1 Pt of PtIL-HCNs were found to be 5.6 and 2.7 times higher than those on the commercial Pt/C. Furthermore, this work demonstrates that unlike one-dimensional (1D) carbon nanotubes and two-dimensional (2D) reduced oxide graphene, the three-dimensional (3D) HCN support plays an indispensable role in preventing any stacking of Pt NPs, leading to significantly enhanced ORR activity and durability.
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高影响因子
危险品化学品经营许可证（带存储）