CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Renhui Ling,Mingxing Li,Xin Li,Laihuan Pei,Xiaoyan Luo,Congmin Wang
MOFs have high adsorption performance of ammonia (NH 3 ) because of its porosity and abundant coordination sites, especially MOFs containing carboxylic acid ligands have emerged as effect NH 3 adsorbents. But, it’s troublous for reversible ammonia adsorption for the strong metal-NH 3 coordination or the collapse of adsorbents. [MEDTA] 2- is a very stable and classic carboxylic acid-containing complex, but there was no relevant report. Therefore, this work carried out the design and synthesis of PVIm-R8-MEDTA based on the use of the coordination structure of [MEDTA] 2- and the stability of PILs’ skeleton. The characterization indicated the [MEDTA] 2- could be introduced into PILs successfully for the hydrogen bonding interactions with the imidazolium cation, and the obtained PVIm-R8-MEDTA presented enhanced NH 3 capacity (10.4–14.7 mmol/g) than their precursor PVIm-R8-Br (7.8 mmol/g). The mechanism of NH 3 adsorption was proposed by DFT calculation, spectroscopic method, and the calorimetric test, it indicated the NH 3 was fixed by imdazolium cation through hydrogen bonding and inserted into two of the carboxylate and metal bonds of [MEDTA] 2- . Because of the multi-meshing coordination of [EDTA] 4- and metal ions, the disconnected carboxylate ions could easily coordinate with metal ions again and repair the chelating structure of [MEDTA] 2- , which caused the ammonia easily be desorbed. In the process of gas adsorption, there was no bonding breakage of the skeleton of PILs, which helped the PVIm-R8-MEDTA be recovered under moisture and NH 3 atmosphere. Thanks for the designability of PILs, such as the cationic structure, structure and size of cross-linking agent, the choice of complex anion and so on, it provides a new design idea and theoretical basis for efficient and reversible ammonia adsorption materials.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2022
·
IF 4.855
Shuaishuai Huang,Yichen Wan,Yuxuan Sun,Kaka Zhang,Xiaoqing Ming,He Zhu,Qi Zhang,Shiping Zhu
Poly(ionic liquid)s (PILs), combining the advantages of both polymers and ionic liquids, have attracted significant attention from the academia and industry. This study has developed a fluorinated PIL copolymer-based adhesive with versatile adhesion ability and high transparency. The adhesive was prepared by in situ UV-curing a precursor solution composed of commercially available monomers, that is, 2,2,3,4,4,4-hexafluorobutyl methacrylate and 1-vinyl-3-butylimidazolium bis(trifluoromethylsulfonyl)imide. The prepared adhesive showed a superior adhesion strength of 6.61 MPa toward glass substrates. Furthermore, minimal addition of a plasticizer in the bulk adhesive could significantly enhance the adhesion performance on fluorinated polymer substrates while maintaining the polar surface bonding strength and high transparency. The resulting PIL-based adhesive showed a strong adhesion on various adherends, such as glass, steel, ceramics, and low surface energy polymers. This work provides a methodology for using PILs as adhesives and is believed to have good potential for commercialization.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
Journal of Materials Chemistry A
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2024
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IF 10.7
Xi Chen,Wei Zhou,Xu Fang,Cheng Li,Die Cong,Tie Yu,Wei-Qiao Deng,Chengcheng Liu
Photocatalytic CO2 reduction to syngas has recently garnered substantial interest due to its mild reaction conditions, high safety, and environmental sustainability. However, the efficiency of syngas production remains relatively low. In this study, we have developed metallosalen-based poly(ionic liquid)s (PILs) to enhance syngas production, achieving one of the highest production rates recorded to date. The Co(Salen)-PIL demonstrates a syngas production rate of 168.1 mmol g−1 h−1, including a CO production rate of 69.3 mmol g−1 h−1, which is more than eight times higher than that of the best previously reported organic materials. Mechanistic investigations reveal that pyridine ions facilitate electron transfer from the heptazine light-harvester to the Co(Salen) active site. This study lays the groundwork for developing high-performance catalysts for photocatalytic syngas production.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 4
·513
·
IF 4.034
Jian Hu,Hao Dai,Yanbo Zeng,Yiwen Yang,Hailong Wang,Xudong Zhu,Lei Li,Guobao Zhou,Ruoyu Chen,Longhua Guo
In this study, we report a cross-linker-based poly(ionic liquid) (PIL) for the sensitive detection of 4-nonylphenol (4-NP). PIL was poly(1,4-butanediyl-3,3′-bis-l-vinylimidazolium dibromide) (poly([V2C4(mim)2]Br2)). Poly([V2C4(mim)2]Br2) was prepared via one-step free-radical polymerization. The poly([V2C4(mim)2]Br2) was characterized by infrared spectroscopy, Raman spectroscopy, thermal gravimetric analyzer and scanning electron microscope. The poly([V2C4(mim)2]Br2) was then drop-cast onto a glassy carbon electrode (GCE) to obtain poly([V2C4(mim)2]Br2)/GCE. In comparison with a bare GCE, poly([V2C4(mim)2]Br2)/GCE exhibited higher peak current responses for [Fe(CN)6]3−/4−, lower charge transfer resistance, and larger effective surface area. While comparing the peak current responses, we found the peak current response for 4-NP using poly([V2C4(mim)2]Br2)/GCE to be 3.6 times higher than a traditional cross-linker ethylene glycol dimethacrylate (EGDMA) based poly(EGDMA) modified GCE. The peak current of poly([V2C4(mim)2]Br2) sensor was linear to 4-NP concentration from 0.05 to 5 μM. The detection limit of 4-NP was obtained as 0.01 μM (S/N = 3). The new PIL based electrochemical sensor also exhibited excellent selectivity, stability, and reusability. Furthermore, the poly([V2C4(mim)2]Br2)/GCE demonstrated good 4-NP detection in environmental water samples.Keywords:poly(ionic liquid);cross-linker;electrochemical detection;4-nonylphenol
研究领域:
环境科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF RARE EARTHS
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2024
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IF 5.2
Xiayu Liang,Aylin M. Deliormanlı,Qingle Zeng
A novel composite material, Poly(IL-AA)@MIL-101(Cr), combining metal-organic framework, polymeric ionic liquid and acrylic acid, was synthesized for the selective and efficient adsorption of rare earths europium(III) (Eu 3+ ). Characterization of the materials was carried out using techniques such as X-ray diffraction (XRD), Fourier transform infrared (FTIR), scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), thermogravimetric analysis (TGA) and Brunauer-Emmett-Teller (BET). The results demonstrate successful incorporation of the polymeric ionic liquid onto the material surface while preserving the crystal structure and morphology of MIL-101(Cr). Adsorption experiments were conducted to explore parameters including solution pH, initial Eu 3+ concentration, and duration, with comprehensive analyses of adsorption kinetics, isotherms, and mechanisms. Findings reveal that Poly(IL1-AA)@MIL-101(Cr), Poly(IL3-AA)@MIL-101(Cr), and Poly(IL5-AA)@MIL-101(Cr) achieve adsorption equilibrium for Eu 3+ at approximately 9 h with an equilibrium pH of 6.2. The adsorption of Eu 3+ predominantly follows a pseudo-second-order kinetic model and Langmuir isotherm adsorption model. Moreover, the prepared composite material exhibits superior adsorption selectivity for Eu 3+ over other metal ions in the mixture (K + , Mg 2+ , Ni 2+ , Co 2+ , Zn 2+ , La 3+ , and Nd 3+ ). Even after five adsorption-desorption cycles, the composite material maintains satisfactory adsorption performance.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Small Methods
·
2025
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IF 9.1
Lei Wang,Jingrui Li,Meng Zong,Yi Liu,Jianfeng Zhu,Limin Wu,Renchao Che
Fabrication of gel-based microwave absorbers is an effective strategy for overcoming the shortcomings of conventional powder-like absorbers, such as complicated processes and undesirable properties. However, the present gel-based microwave absorbers generally consist of a polymer skeleton and a liquid dispersion medium and suffer from leakage of the dispersion medium. In this study, a novel gel-like poly(ionic liquid) (PIL) microwave absorber with excellent properties is prepared. A maximum reflection loss (RL max ) of −58.8 dB GHz and an effective absorption bandwidth (EAB) of 10.56 GHz are achieved, which is mainly ascribed to high ionic conduction loss derived from lower glass transition temperature (T g ). Furthermore, the prepared PILs consisted of cationic imidazole-containing alkoxy moieties as the polymer chain and bis(trifluoromethanesulfonyl) imide (TFSI − ) as the counter ion in the absence of a dispersion medium. The PILs displayed stretchability and adhesive and self-healing abilities, thus providing a new candidate for developing high-efficiency microwave absorbers for practical applications.
研究领域:
材料科学
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电磁学
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产品关联
DOI
PubMed
高影响因子
POLYMER ENGINEERING AND SCIENCE
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2013
·Vol. 54
·期 1
·59-63
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IF 1.243
Guangren Yu,Qingzeng Li,Na Li,Ziwei Man,Chenghao Pu,Charles Asumana,Xiaochun Chen
A new poly(ionic liquid) of N , N -methylenebisacrylamide (MBA)-crosslinked-poly(4-vinylbenzyltriethylammonium hexafluorophosphate)(MBA-crosslinked-P[VBTEA][PF 6 ]) is prepared through the ion exchange of KPF 6 with the precursor of MBA-crosslinked-P[VBTEA][Cl]; the precursor is synthesized by 4-vinylbenzyltriethylammonium chloride and MBA via inverse suspension polymerization. MBA-crosslinked-P[VBTEA][PF 6 ] is a thermally stable (decomposes at nearly 300°C) and porous (apparent porosity of 64.3% and specific surface of 39.12 m 2 /g) polymer particle with high purity, as indicated by Fourier transformed infrared, energy dispersive spectroscopy, thermogravimetric, scanning electron microscopy, and porous analyses. It is observed that MBA-crosslinked-P[VBTEA][PF 6 ] has good CO 2 adsorption capability of 14.04 mg/g at 0.2 MPa and 25°C, and can be recovered by desorption at vacuum and 80°C, and reused with 99% CO 2 adsorption after four cycles. POLYM. ENG. SCI., 54:59–63, 2014. © 2013 Society of Plastics Engineers
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2020
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IF 4.3
Fengjie Deng,Jie Liang,Guang Yang,Qiang Huang,Jibo Dou,Junyu Chen,Yuanqing Wen,Meiying Liu,Xiaoyong Zhang,Yen Wei
The porous materials have been extensively explored for various applications especially for the environmental treatment. In this work, we reported a novel strategy for the surface modification of mesoporous carbon (MC) that relied on an efficient and green Diels–Alder [4 + 2] cycloaddition and the multicomponent Radziszewski reactions for the first time to in-situ generate poly (ionic liquids) (PIL) on the surface of MC. The resulting MC@PIL composites have been characterized using a series of instrumental techniques to elucidate their morphology, chemical compositions and other properties. Batch experiments towards adsorbing Congo red (CR) with contact time, initial concentration, variable pH and reaction system temperature were conducted to evaluate the adsorption behaviors. Furthermore, thermodynamic analysis of adsorption process is also discussed. The results demonstrated that CR could be rapidly adsorbed on MC-PIL composites within 10 min and displayed obvious enhancement adsorption capacity (331.49 mg/g) towards CR as compared with pristine MC. In addition, the adsorption/desorption cycle of the MC@PIL composites was also tested. The results show that the adsorption capacity of the third adsorption-desorption cycle can reach 199.0223 mg/g and desorption yield above 80%. Considered the good designability of molecules involved in Radziszewski reaction, many functionalized MC could thus be fabricated and these PIL functionalized composites should be efficient and promising candidates for removal of different pollutants from wastewater.
研究领域:
环境科学
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材料化学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Yichen Jiang,Dazhi Li,Yifei Zhao,Jianmin Sun
Hydrogen bond donor functionalized poly(ionic liquids) were incorporated into MIL-101 framework for synthesis of composites PIL-R@MIL-101 (R = COOH, OH, NH 2 ). The effect of different hydrogen bond donors on CO 2 -epoxide cycloaddition reaction was discussed through XPS, NH 3 -TPD characterizations. Thereinto, PIL-COOH@MIL-101 showed efficient catalytic performance in the cycloaddition reaction of CO 2 and epichlorohydrin , 92.7% substrate conversion was obtained under 70 °C, 1.0 MPa, cocatalyst- and solvent-free conditions for 2.5 h. The improved activity was benefited from the synergistic effects of Lewis acidic Cr centers, carboxyl group, and nucleophilic Br - , together with the high surface area (1178 m 2 /g), and good CO 2 affinity. In addition, PIL-COOH@MIL-101 also showed facile recovery method by easy centrifugation and good recycling stability. Considering the good CO 2 affinity, excellent catalytic performance in CO 2 cycloaddition reaction, better thermal and recycling stabilities, the facilely prepared functionalized poly(ionic liquid)@MIL-101 composite would exhibit promising application prospect in CO 2 capture and conversion.
研究领域:
材料科学
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化学工程
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2022
·
IF 5.204
Zhiqiang Jiang,Dongxia Yan,Jiayu Xin,Fei Li,Mengquan Guo,Qing Zhou,Junli Xu,Yufeng Hu,Xingmei Lu
The methanolysis of polyethylene terephthalate (PET) was investigated using poly(ionic liquid)s (PILs) synthesized with 1-vinyl-3-ethylimidazole acetates ([VEIm]Ac) and acrylic acid metal salts, and the activities of the PILs were screened. The effects of reaction temperature, reaction time, methanol amount, catalyst amount and PET sources on the methanolysis of PET were investigated using the optimized catalyst PIL-Zn 2+ . Under the optimal conditions the conversion of PET was 100% and the yield of dimethyl terephthalate (DMT) was 89.1%. In addition, the catalyst has very good applicability for methanolysis of different PET raw materials. More importantly, the PIL-Zn 2+ catalyst could be recycled by simple filtration after the reaction, and could be reused six times without significant decrease in PET conversion and DMT yield. The catalysts were analyzed by TGA, FT-IR, XRD and ICP before and after recycling, the results showed no change in the structure of the catalyst, reflecting the good stability of the catalyst. The reaction kinetics of PIL-Zn 2+ was first-order with an activation energy of 107.6 kJ/mol. This work mainly provides a way to design efficient, stable and recyclable catalysts for PET methanolysis.
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
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IF 6.216
Huawei Yang,Bin Jiang,Yongli Sun,Luhong Zhang,Zhaoning Sun,Jingyuan Wang,Xiaowei Tantai
In this work, poly(ionic liquid)s (PIL), namely poly-[1-vinyl,3-alkylimidazolium] bromine (PVABr) with different length of monomer carbon chain have been synthesized and assembled with [β-Mo 8 O 26 ] 4− into novel interlinked thin-layer nano-wire mesoporous material. The resulting POM/PIL hybrids were characterized by different techniques and utilized to catalyze the oxidative desulfurization (ODS) of thiophenic compounds with H 2 O 2 as oxidant. Detailed experiments for ODS of synthesized diesel were carried out to investigate the influence of some important factors, including reaction temperature, molar ratio of H 2 O 2 /S, catalyst dosage and sulfide species. As for the desulfurization of hydrogenated diesel, it was observed that almost all of the original sulfur compounds in diesel could be completely converted and a further solvent extraction with methanol as extractant led to the deep sulfur removal. The catalyst could at least be reused for six times without noticeable changes in catalytic performance. The results demonstrate that the mesoporous isopolyanion-based polymeric hybrid is an efficient, durable and sustainable catalyst for ODS of diesel fuel.
研究领域:
化学工程
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催化科学
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环境科学
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产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 4
·2085-2095
·
IF 3.119
Bingyan Yin,Wenqing Xu,Chengjun Liu,Miqiu Kong,Yadong Lv,Yajiang Huang,Qi Yang,Guangxian Li
Poly(ionic liquid) (PIL), integrating the characteristics of both polymers and ionic liquid, is synthesized and employed to modify diglycidyl-4,5-epoxy-cyclohexane-1,2-dicarboxylate (TDE-85). With the addition of PIL, the fracture toughness, and thermal and dielectric performances of TDE-85 were discovered to be simultaneously improved, meanwhile the tensile modulus and strength is increased. Upon an optimal loading of 3 wt% PIL, the critical stress intensity factor (KIC), tensile modulus and strength are raised by 92.9%, 13.3% and 10.7%, respectively. Multi-toughening mechanisms due to spherical domains of PIL formed in TDE-85 during curing are responsible for the improved toughness. Moreover, the dielectric and thermal properties of TDE-85 are also enhanced by adding PIL. With the optimal addition of 5 wt% PIL, the dielectric constant of the composites is enhanced by 62.5%, the glass transition temperature is increased by 16.58 °C and the residual weight of carbon is increased by 59%.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）