JOURNAL OF APPLIED POLYMER SCIENCE
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2017
·Vol. 134
·期 17
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IF 1.86
Chunhui Du,Xumin Ma,Jing Li,Chunjin Wu
This study describes the fabrication and properties of poly(vinylidene fluoride) (PVDF) filtration membranes modified by blending with ionic liquid block copolymer P(MMA- b -MEBIm-Br), which is synthesized via reversible addition-fragmentation chain transfer polymerization method. The attenuated total reflectance-Fourier transform infrared spectroscopy and X-ray photoelectron analyses reveal that the ionic liquid block copolymers are immobilized on PVDF membrane surface. The modified PVDF membrane exhibits excellent charged and antifouling properties because of the charged and hydrophilic properties of the copolymer. Scanning electron microscopy and atomic force microscopy also indicate the morphological characteristics of the membrane and demonstrate that the surface porous structure becomes denser after adding the copolymer. The data of filtration and the zeta potential of the membranes suggest that the charged properties of the ionic liquid block copolymers are mainly responsible for the improvement of the reversible fouling ratio and the decrease in the total fouling ratio of the membranes. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44751.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Syed Jalil Shah,Xinqi Luan,Xin Yu,Weige Su,Yucheng Wang,Zhongxing Zhao,Zhenxia Zhao
The development of metal organic framework (MOF)-based π-π conjugated structures capable of effectively transforming H 2 O from humid air to • OH radicals for VOCs photodegradation is a significant but difficult task. Herein, an amino-ionic liquid (NH 2 -IL) based dual-mode bridging strategy was proposed to connect 3D-graphene with NH 2 -MIL-125 forming IL-3DGr/NM(Ti) nanohybrids for advanced acetaldehyde photodegradation. The rational integration of these components was responsible for: (1) maintaining π-π conjugated electron transport system; (2) generating abundant coordinatively unsaturated sites and oxygen vacancies; (3) increasing surface area of the nanohybrids. With these attributes, IL-3DGr/NM(Ti) demonstrated enhanced charge separation and transportation electrochemical impedance spectroscopy (EIS): 7-times), acetaldehyde adsorption (22 %), light absorption (bandgap: 1.51 eV). The rapid H 2 O adsorption and photoconversion to • OH radicals by IL-3DGr/NM(Ti) enabled it to demonstrate superior CH 3 CHO photodegradation rate under high humidity, surpassing many state-of-the-art photocatalysts by 9 to 187 times under static air conditions and with nearly similar catalyst dosages* (photocatalyst weight and initial acetaldehyde concentration (mg ppm −1 ) ratio). Interestingly, the IL-3DGr/NM(Ti) photocatalytic activity was enhanced by increasing RH% up-to 80 %. Besides, the nanohybrids demonstrated tremendous stability, with only a 3.9 % decline observed after 5 consecutive-cycles. This strategy provides new prospects to improve the compatibility of graphene/MOF materials for futuristic photoelectrical applications under high humidity.
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Scientific Reports
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2017
·Vol. 7
·期 1
·1-9
·
IF 4.259
Liang Ning,Hou Xiaohong,Huang Peiting,Jiang Chao,Chen Lijuan,Zhao Longshan
N-butyl pyridinium bis((trifluoromethyl)sulfonyl)imide ([Hpy]NTf 2 ) functionalized core/shell magnetic nanoparticles (MNPs, Fe 3 O 4 @SiO 2 @[Hpy]NTf 2 )) were prepared and applied as an adsorbent for magnetic solid phase extraction (MSPE) of three commonly used industrial dyes including malachite green, crystal violet and methylene blue. Extraction solution was mixed with 100 mg extraction material of Fe 3 O 4 @SiO 2 @[Hpy]NTf 2 , and 1 mL of acetonitrile was used to elute target analytes for further extraction and purification. [Hpy]NTf 2 was used as extraction solution, and 500 μL methanol was selected as dispersive solvent in ionic liquid (IL) dispersive liquid–liquid microextraction (DLLME) method. After sonication for 5 min and centrifugation at 447 g for 10 min, 20 μL of sedimented phase was injected into HPLC-UV system. The limit of detection (LOD) and limit of quantification (LOQ) of current method were 0.03 and 0.16 μg·L −1 , respectively, which indicated the sensitivity was comparable or even superior to other reported methods. The relative recoveries of the target analytes ranged from 86.1% to 100.3% with relative standard deviations between 0.3% and 4.5%. The developed method has been successfully applied to determine the level of three industrial dyes in different water samples.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Qinglong Xie,Yuqiang Zhou,Hongwei Zhao,Jiayi Mei,Tongbo Pan,Fuqiang Chen,Ying Duan,Shangzhi Yu,Yong Nie
Biochemical pathways to generate renewable and high value-added diols and dicarboxylic acids have attracted increasing interest. However, the diols/dicarboxylic acids usually exist in the form of low-concentration aqueous solution after the bioprocesses, causing the issues of low efficiency and high energy consumption in the separation and recovery of these highly hydrophilic bioproducts. Here, we developed an aqueous two-phase system (ATPS) consisting of ionic liquid (IL) and inorganic salt for efficient extraction of the bio-based diols and dicarboxylic acids. The optimal salt, IL, and extractant to feed volume ratio were K 4 P 2 O 7 , [Bmim][C 12 H 23 O 2 ], and 1:4, respectively. The selected IL showed large capacity and good reusability, with the highest dehydration rate reaching up to 97.6%. More importantly, the IL-based ATPS exhibited effectiveness and high efficiency in the separation of various low-concentration diols and dicarboxylic acids, with the recovery exceeding 91.9%. To explore the extraction mechanism, the structural and interactions analyses were conducted by DFT calculations. The strength of hydrogen bond interactions formed between diols/dicarboxylic acids and ILs and those between salts and water largely determines the extraction performance. Moreover, three descriptors that can well represent the H-bond basicity and polarizability/dipolarity of ILs were established to facilitate the IL evaluation and screening.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Xiaoyang Liu,Na Zhang,Zhen Dong,Jifu Du,Lifang Peng,Long Zhao,Miao Yang
Technetium ( 99 Tc) is a main long-lived radionuclide of nuclear waste, which poses a great threat to the environment and human health. The reasonable disposal of 99 Tc is vital important. In this paper, a series of novel materials (SMILR m , m = 0, 1/500, 1/200, m is the molar ratio of IL to RAFT reagent) was synthesized by radiation-induced grafting combined with reversible addition-fragmentation chain transfer (RAFT) polymerization. The adsorption performance of SMILR m to 99 Tc were investigated. The graft polymerization process is controlled by the RAFT reagent, resulting in a restricted dispersion of SMILR m molecular weight. With the increase of RAFT reagent content, the grafting yield (GY) decreased. The addition of RAFT reagent increases the specific surface area of the adsorbent, accelerates the adsorption rate, increases the adsorption capacity, but reduces the adsorption selectivity. Especially, the adsorption of SMILR 0 was a single step adsorption and obeyed Langmuir adsorption model, while SMILR m (1/500, 1/200) showed a stepwise adsorption isotherm model. SMILR m exhibited excellent recyclability and could efficiently capture Re O 4 - from a simulated Beishan groundwater in dynamic experiments. Finally, XPS and FT-IR analysis confirmed that the adsorption was an ion exchange mechanism. The results showed that SMILR m are suitable for the effective removal of Re O 4 - / T c O 4 - from radioactive wastewater with complex composition.
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Catalysis Science & Technology
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2024
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IF 4.4
Jianghui Lin,Jiamei Luo,Mengjia Zhang,Lei Zhang,Guohui Cai,Jiahua Zou,Ling Li
Incorporation of ionic liquids into metal–organic frameworks (MOFs) offers a new platform to construct heterogeneous bifunctional catalytic systems for the chemical capture and conversion of CO2 with epoxides. Herein, an imidazolium-based ionic liquid decorated UiO-66 type MOF (P3[BCMIm]Br@UiO-66) was successfully constructed via solvothermal assembly of the carboxyl-functionalized imidazolium ionic liquid ligand, terephthalic acid ligand and Zr(IV) ions. It exhibits the highest catalytic activity upon the cycloaddition of CO2 (98.2% conversion of propylene oxide and 99% selectivity to propylene carbonate) under optimized conditions (2.2 Mpa CO2, 1.0 wt%, 110 °C, reaction time 2 h). Notably, P3[BCMIm]Br@UiO-66 outperformed the original UiO-66 materials and [BCMIm]Br. P3[BCMIm]Br@UiO-66 retained its good catalytic performance for up to five recycling runs with only a little loss in catalytic activity. Furthermore, several additional coupling reactions were investigated with other epoxides as substrates.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Xikun Zhang,He Zhang,Xue Lv,Ting Xie,Junzheng Chen,Di Fang,Shurui Yi
Conductive hydrogels , as novel flexible biosensors, have demonstrated significant potential in areas such as soft robotics, electronic devices, and wearable technology. Graphene is a promising conductive material , but its dispersibility in aqueous solutions exists difficulties. Here, we discover that untreated graphene, after exfoliation by different ionic liquids , can disperse well in aqueous solutions. We investigate the impact of four ionic liquids with varying alkyl chain lengths ([Bmim]Cl, [Omim]Cl, [Dmim]Cl, [Hmim]Cl) on the dispersibility of grapheme, and a dual physically cross-linked network hydrogel structure is designed using acrylamide (AM), acrylic acid (AA), methyl methacrylate octadecyl ester (SMA), ionic liquid@graphene (ILs@GN), and chitosan (CS). Notably, SMA, CS, AA and AM act as dynamic cross-linking points through hydrophobic interactions and hydrogen bonding , playing a crucial role in energy dissipation. The resulting hydrogel exhibits outstanding stretchability (2250 %), remarkable toughness (1.53 MJ/m 3 ) in tensile deformation performance, high compressive strength (1.13 MPa), rapid electrical responsiveness (response time ∼ 50 ms), high electrical conductivity (12.11 mS/cm), and excellent strain sensing capability (GF = 12.31, strain = 1000 %). These advantages make our composite hydrogel demonstrate high stability in extensive deformations, offering repeatability in pressure and strain and making it a promising candidate for multifunctional sensors and flexible electrodes.
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INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Ying Zeng,Hao Chen,Guangjin Hu,Rui Cai,Yujie ChenYang,Zhixing Huang,Benyong Han
Eight novel amino acid (AA)–based trifluoromethanesulfonate ionic liquids (ILs; named [AAH][CF 3 SO 3 ]-ILs) were synthesized via neutralization reactions from natural AAs and trifluoromethanesulfonate (CF 3 SO 3 H). The catalytic performance of [AAH][CF 3 SO 3 ]-ILs in biodiesel preparation was evaluated with oleic acid and methanol as substrates. Among the eight [AAH][CF 3 SO 3 ]-ILs, the proline trifluoromethanesulfonate ([ProH][CF 3 SO 3 ]) catalyst displayed the best catalytic activity. The optimal process conditions for the response surface methodology (RSM) were as follows: [ProH][CF 3 SO 3 ] loading = 14.99 wt%, MeOH-to-oleic acid molar ratio = 17.94:1, reaction time = 1.95 h, and temperature = 71°C, and an oleic acid conversion rate of 98.97% was obtained. A first-order reaction kinetics of [ProH][CF 3 SO 3 ]–catalyzed oleic acid esterification showed an activation energy of 18.25 kJ·mol −1 and a frequency factor of 14.04 min −1 . ΔH, ΔS, and ΔG of oleic acid esterification reaction were 15.42 kJ·mol −1 , −0.232 kJ·mol −1 ·K −1 , and 97.32 kJ·mol −1 , respectively. The catalytic activity of [ProH][CF 3 SO 3 ] did not considerably change after eight reuse cycles, demonstrating its excellent stability and reusability. When applied as a catalyst, [ProH][CF 3 SO 3 ] dissolved in the reaction medium during the esterification reaction, enabling efficient homogeneous catalysis . After the reaction, phase separation automatically occurred between biodiesel (methyl oleate) and the catalyst, minimizing the product separation and purification process. The application of [ProH][CF 3 SO 3 ] in this study provides an environmentally friendly technique for biodiesel production . [ProH][CF 3 SO 3 ] is a promising renewable catalyst that it can be used to catalyze fatty acid esterification for biodiesel preparation instead of traditional catalysts.
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Food Chemistry-X
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2024
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IF 6.5
He Mei,Ping Xu,Mengting Feng,Jianping Wang,Chenxin Zhang,Haibin Chen,Huili Wang,Junyi Guo,Xuedong Wang,Shugen Qu
Developing a rapid detection method of Cr(VI) and ascorbic acid (AA) is vital in the food and environmental fields. Herein, an anthrylimidazole-based fluorescent ionic liquid (AI-FIL) with the advantageous fluorescent properties was successfully prepared and used to construct a promising “on-off-on” fluoroprobe for rapid/sensitive Cr(VI) and AA detection. Cr(VI) could effectively quench the fluorescence of AI-FIL owing to the inner-filter effect and photoinduced electron-transfer process. However, the decreased fluorescence could be rapidly recovered by AA owing to the redox reaction between AA and Cr(VI). For Cr(VI) detection, a satisfactorily linear response (0.03–300 μM) was achieved with the corresponding detection limit of 9 nM. For AA detection, a good linearity from 1 to 1000 μM was obtained with the resultant detection limit of 0.3 μM. Moreover, the AI-FIL based fluoroprobe was successfully utilized for Cr(VI) and AA detection in food and water samples with satisfactory accuracy and precision.
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INTERNATIONAL JOURNAL OF PHARMACEUTICS
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2025
·
IF 5.2
Ziyi Liu,Xiaojuan Li,Sha Xiong,Ting Xiao,Siwen Jiao,Guihong Chai,Yuehong Xu
Androgenic alopecia (AGA), the most prevalent type of progressive hair loss, currently lacks an effective topical treatment regimen. In this study, we synthesized an ionic liquid (IL) to co-solubilize minoxidil (MXD) and finasteride (FIN) and subsequently formulated them into an in situ thermosensitive ionic liquid/cyclodextrin/poloxamer hydrogel (ICPG), termed M + F@ICPG. M + F@ICPG was developed for the transdermal co-delivery of these two drugs, aiming to provide a multipath therapeutic approach for AGA while avoiding the adverse effects commonly associated with oral FIN and topical MXD tincture. The thermosensitive characteristics, skin penetration, hair follicle (HF) targeting efficiency, biosafety, and in vivo therapeutic efficacy of M + F@ICPG were evaluated using an AGA mouse model. Our results demonstrated that M + F@ICPG was a thermosensitive hydrogel, transitioning from solution to gel upon contact with the scalp. Compared to the FIN suspension and MXD tincture, M + F@ICPG significantly enhanced the skin penetration (∼2.2-fold) and retention (∼8.6-fold) of FIN and increased the relative retention of MXD (∼6.3-fold) in the skin. Moreover, M + F@ICPG exhibited a HF targeting index of 1.74 for MXD and 1.46 for FIN, indicating enhanced drug targeting to HF. M + F@ICPG showed superior in vivo efficacy in terms of hair regeneration, anagen recovery, inflammation mitigation, and microvessel reconstruction. The underlying mechanism was attributed to the upregulation of hair growth genes, downregulation of hair loss genes, and reduction of abnormally elevated inflammatory factors. These findings suggest that this novel M + F@ICPG is a promising topical co-delivery system for the synergistic treatment of AGA.
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Soft Matter
·
2012
·Vol. 8
·期 46
·11644-11653
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IF 4.39
Zhangwei Wang,Hengjie Lai,Peiyi Wu
The assembly properties, thermal phase behavior and microdynamics of poly(NIPAM-b-BVImBr), poly(N-isopropylacrylamide)-b-poly(1-butyl-3-vinylimidazolium bromide), in aqueous solution are investigated by dynamic light scattering (DLS), turbidity measurements and FTIR spectroscopy in combination with two-dimensional correlation spectroscopy (2Dcos) and the perturbation correlation moving window (PCMW) technique. In particular, the influence of the introduction of the poly(BVImBr) segment on the solution properties of the block copolymer has attracted our attention: a core–shell micelle structure forms, consisting of a relatively hydrophobic core of poly(BVImBr) and a hydrophilic shell of PNIPAM; the phase transition temperature increases, due to one more step in the dehydration process originating from the alkyl side chains of the poly(1-butyl-3-vinylimidazolium bromide) (PIL) segment; what's more, a stronger hysteresis during the heating–cooling cycle, closely related to the recovery process, is observed. It reveals that the hydrogen bonds of CO⋯D–N among the micelles formed during heating are harder to remove, thus, the reconstruction of the CO⋯D–O–D hydrogen bonding and the recovery hydration process for the C–H groups during cooling are prevented due to the compact and regular micelle structure. More interestingly, the CO groups interact with the N–D groups at room temperature because of the existence of the micelle structure, which is regarded as intra-micelle hydrogen bonding; above the LCST, hydrogen bonds of the CO⋯D–N among the aggregated micelles called inter-micelle hydrogen bonding occur.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2024
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IF 6.3
Jinxu Zhao,Qijun Chen,Zitao Wang,Jianming Zheng,Chunye Xu
Ionic liquids have been recognized as promising electrolytes in electrochromic devices (ECDs). However, the limited solubility of commercial electrochromic materials (ECMs) in ionic liquid effects the electrochromic performance of ECDs. This work synthesized viologen-type (Vio-IL) and ferrocene-type (Fc-IL) room-temperature ionic liquids (RTILs), which have melting points of −22.5 °C and −43.6 °C, respectively. ECDs prepared using these two RTILs exhibit superior optical modulation ability (ΔT = 79.4 %) and good cyclic stability (1000cycles 96.2 %). These two RTILs exhibit advantages because they can be miscible with commonly ionic liquids solvent. Further, ultra-thin (10 μm) ECDs prepared using these RTILs with 20 wt% ionic liquid diluent not only have good electrochromic performance (ΔT = 73.1 %, 1000cycles 95.6 %, 3.7 s for coloring and 13.3 s for bleaching) but also have a wide temperature working window (−30°C–70 °C). These ultra-thin and low-solvent ECDs have the potential to enable temperature adaptability and lightweight and eco-friendly smart windows.
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危险品化学品经营许可证（带存储）