CHINESE JOURNAL OF CATALYSIS
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2014
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IF 1.552
Wenju Wang,Huiling Li,Junli Ren,Runcang Sun,Jie Zheng,Guangwei Sun,Shijie Liu
An efficient homogeneous catalytic process was developed for the dehydration of xylose to furfural using inorganic salts as catalysts in a water/dimethyl sulfoxide (DMSO) system under mild condition. The effects of the types of inorganic salts were compared. The results showed that chlorides had higher catalytic performance than other salts, and SnCl 4 was the most effective chloride. The catalytic activity of paired SnCl 4 /LiCl catalysts was much higher than that of the single salt, and when the distribution coefficient ( χ SnCl4 ) was 0.8, the maximum furfural yield was 56.9%. The effects of the reaction conditions on the furfural yield were also investigated. The highest furfural yield, 63.0%, was achieved at 130 °C for 6 h under the optimized reaction conditions.
研究领域:
化学工程
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生物化工
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产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2023
·
IF 3
Cijian Zhang,Shicong Song,Qian Liu,Jiahui Li,Qi Cao,Shouhai Zhang,Xigao Jian,Zhihuan Weng
The innovative aerogel obtained by introducing bisphenol A-type polysulfone (PSF) as a precursor has excellent stability and can meet the need for thermal insulation at higher temperatures. In this study, PSF was modified by chloromethylation in a simple one-step process, and then PSF aerogels with tunable structural properties were tailored by changing the degree of chloromethyl and types of amino crosslinkers. This is the first report of the introduction of PSF into the aerogel field as far as we know. The density and volume shrinkage of the obtained aerogels were as low as 46.7 mg/cm 3 and 21.3%, respectively. Compared with aerogels made with triethylenetetramine as the cross-linking agent, aerogels obtained with polyetheramine D230 exhibited better structural stability, higher specific surface area and lower thermal conductivity (down to 0.036 W/mK), which was more favorable for the thermal insulating ability of the aerogel. These findings provide a new design idea for the selection of precursors for polymer-based aerogels.
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
RSC Advances
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2022
·Vol. 12
·期 3
·1460-1470
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IF 4.036
Xin Wen,Can He,Yuyan Hai,Rui Ma,Jianyu Sun,Xue Yang,Yunlong Qi,Hui Wei,Jingyun Chen
Sulfonated polysulfone (SPSF) with different sulfonation degrees (10%, 30%, and 50%) was added to polyethersulfone (PES) to improve the separation and antifouling performance of polyethersulfone ultrafiltration membranes. The PES/SPSF blend ultrafiltration membrane was prepared by the non-solvent induced phase inversion method (NIPS), and the effect of sulfonation degree on the ultrafiltration performance was studied. The compatibility of SPSF and PES was calculated by the group contribution method, and confirmed by differential scanning calorimetry (DSC). The morphology and surface roughness of the membrane were characterized by scanning electron microscopy (SEM) and atomic force microscopy (AFM), the chemical composition of the membrane was analyzed by X-ray photoelectron spectroscopy (XPS) and infrared spectroscopy (FTIR), and the permeability and anti-fouling performance of the blend membrane were studied through filtration experiments. The research shows that the flux and anti-fouling performance of the blend membrane have been improved after adding SPSF. When the sulfonation degree of the SPSF is 30%, the pure water flux of the blend membrane can reach 530 L m−2 h−1, the rejection rate of humic acid (HA) is 93%, the flux recovery rate of HA increases from 69.23% to 79.17%, and the flux recovery rate of BSA increases from 72.56% to 83%.
研究领域:
材料科学
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环境工程
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膜技术
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化学工程
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产品关联
DOI
PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
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2020
·Vol. 26
·期 35
·7918-7922
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IF 4.857
Yichen Zhou,Mingmin Jia,Xiongfei Zhang,Jianfeng Yao
Graphical Filling the voids : Etched ZIF-8 (ZIF-8-E) crystals permeated by open through pores of size about 100 nm have been introduced into a polyethersulfone membrane matrix. The resulting material shows enhanced CO 2 /N 2 separation performance (see scheme). Zeolite ZIF-8 has been etched with acid to form microporous ZIF-8-E crystals. These were then introduced into a polyethersulfone (PES) membrane matrix to enhance its CO 2 /N 2 separation performance. Open through pores of size about 100 nm formed in the ZIF-8 crystals allow the ingrowth of polyethersulfone chains, ensuring a reduction in the number of nonselective voids, thereby achieving better interaction between ZIF-8-E and PES. As a result, the CO 2 /N 2 separation performance of the ZIF-8-E/PES membrane increased significantly, showing a CO 2 permeability of 15.7 Barrer and a CO 2 /N 2 ideal selectivity of 6.5.
研究领域:
材料科学
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环境工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Tengning Ma,Hong Luo,Weiyuan Zhou,Huijuan Zhang,Rui Yuan,Qing He,Ying Huang,Li Yang,Guanjun Chang
Counterfeiting and information leakage have become critical global challenges, exacerbated by rapid technological advancements. This study presents a novel stimuli-responsive polymer, poly(imino sulfone) (PIS), synthesized via a simple C-N coupling reaction. The findings reveal that PIS exhibits fast, high-contrast, reversible color and fluorescence dual-mode stimuli-response, driven by the protonation-deprotonation of imine groups under varying acid-base conditions. Additionally, the rigid polymer structure, coupled with strong hydrogen bonding, imparts PIS excellent thermally stable (T 5% = 463 °C, T g = 245 °C), surpassing other polymers with stimulus-responsive discoloration capabilities. Notably, even at low concentrations (0.1 wt%), PIS demonstrates strong emission performance and stimulus-induced color-change behavior. The information encoded using PIS can be efficiently and repeatedly encrypted and decrypted under acid-base stimuli, thereby enhancing the confidentiality and security of the information. When integrated into polymer matrices, PIS not only imparts quick, stable and reversible dual-mode stimulus-responsive behavior but also enhances the thermal and mechanical properties of the host materials. The resultant PIS-based patterns exhibit excellent anti-counterfeiting performance. These unique properties position PIS as a promising candidate for advanced anti-counterfeiting and encryption applications.
研究领域:
材料科学
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化学
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2025
·
IF 9
Xuehui Ge,Jun Qian,Zhen Zhu,Yafei Cheng,Lei Yuan,Jinjie Jia,Xiaolei Liu,Hongwei Zhang,Xiaocheng Lin
Membrane separator that is highly ionic conductive and alkaline stable is essential for the efficient, scalable electrocatalytic oxidation of HMF to FDCA, a key process for sustainable development. Drawing inspiration from the microstructural design of Nafion, we developed a series of side-chain imidazolium-functionalized anion exchange membranes (AEMs), employing the chemically stable polyethersulfone (PES) as the base polymer. Functionalization of PES side chains with chloromethyl groups, followed by C2-substituted imidazolium modification, enabled precise tuning of the membrane's physicochemical properties and structural characteristics. This tailored approach yielded an optimized DIM-PES-1.0 AEM exhibiting complete HMF conversion, with 94.0 % selectivity for FDCA and 94.1 % Faradaic efficiency, outperforming the commercial Fumasep FAA-3-PK-130 AEM, which achieved only 85.5 % FDCA selectivity under similar conditions. Notably, the DIM-PES-1.0 AEM demonstrated high alkaline stability, substantially retaining its electrocatalytic activity across 15 cycles, in contrast to the rapid degradation observed in FAA-3-PK-130 AEM after only three cycles. Our findings showcase a scalable, efficient strategy for producing high-performance AEMs under mild conditions, highlighting their potential for advancing sustainable electrocatalytic processes.
研究领域:
化学工程
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可持续发展
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电催化
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产品关联
DOI
高影响因子
DESALINATION
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2024
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IF 8.3
Zongrui Song,Yujie Wu,Junjie Lv,Yanhong Ji,Mohammad Younas,Benqiao He
Loose nanofiltration (LNF) membranes have extensive applications in precision separation processes, however, synthesizing highly permselective LNF membranes is still a considerable obstacle. Nanobubble-assisted pore-forming method was adapted to prepare a highly perm-selective LNF membrane for the first time in this work, using polysulfone (PSf) as the membrane-forming material, azodicarbonamide (AC) as the reactive pore-forming agents, and NaOH solution as the coagulation and immersion baths. By leveraging nano-bubbles produced through the reaction between AC and NaOH without adding other pore-forming agents, the membrane-forming process of PSf was regulated. It was found that the PSf LNF membranes prepared in NaOH-solution coagulation and immersion baths exhibited significantly enhanced permeation performance without compromising the rejection. These results suggested that the coagulation and immersion post-treatment processes under NaOH solution had a great effect upon the structure and the property of the membranes. The LNF membrane prepared from 20 wt% PSf casting solution with 8 wt% AC achieved a permeation flux of 188.7 L m −2 h −1 , and a Congo red (CR, Mw =696 Da) rejection of over 99 %, while a rejection of NaCl below 7 %, showing a good separation for the CR/NaCl mixed solution. Additionally, the membrane exhibited favorable mechanical properties, with a tensile strength as high as 6.5 MPa and a fracture elongation reaching as much as 32.3 %. This work provided a novel approach for producing high-performance LNF membranes in treating dye wastewater.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
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2022
·Vol. 46
·期 14
·19357-19367
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IF 4.672
Jiuqing Liu,Feifei Song,Junying He,Zikun Hong,Qihou Li,Ya Chen,Lishun Bai,Fanli Zeng,Chen Cheng,Zehao Chen
Summary Owing to its unparalleled theoretical energy density, the Li-O 2 batteries are thought to be one of the most promising energy storage systems, but its application is seriously hindered by its potential safety risks arising from the passivation and corrosion of lithium anode. To address these issues, it is an efficient way to develop functionalized separator that could prevent the migration of anions and macromolecules from cathode toward anode. Herein, a novel Nafion-functionalized polyethersulfone (PES)-based ion-permselective separator was prepared by using non-solvent induced phase separation (NIPS) method. The Nafion ensures a better physical strength of the composite separator, and further characterizations show that the obtained composite separator owns good ionic conductivity (0.52 mS cm −1 ), high lithium ion migration number (0.80), and better cyclic stability (120 cycles, 1000 mAh g −1 ). Consequently, the composite separator serves as an excellent candidate to solve the “shuttle effect” of redox mediators (RMs), the assembled Li-O 2 battery with composite separator adding LiI as RMs presents lower charge overpotential and longer cycle stability (170 cycles, 1000 mAh g −1 ).
研究领域:
材料科学
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电化学
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2011
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IF 3.673
Song Zhao,Zhi Wang,Xin Wei,Boran Zhao,Jixiao Wang,Shangbao Yang,Shichang Wang
Emeraldine base polyaniline (PANiEB), which is mostly soluble in N-methyl-2-pyrrolidone (NMP) and slightly soluble in water, was used as the additive to prepare polysulfone (PSf)/PANiEB membrane via immersion precipitation process. The behavior of PANiEB during membrane formation and the effect of PANiEB addition on membrane structure and performance were investigated. During membrane formation, a portion of PANiEB, located near the surface of the casting film, could diffuse out of the casting film along with NMP into the coagulation bath and act as pore forming agent. The other portion of PANiEB could remain in the prepared membrane and act as hydrophilic modifier. All the PSf/PANiEB membranes had higher porosity, larger surface pore size, more vertically interconnected finger-like pores and less macrovoids than PSf membrane. PSf/PANiEB membranes exhibited stable pure water flux during membrane compaction at 0.30 MPa TMP and slower pure water flux decline at 0.5 MPa TMP than PSf/polyvinylpyrrolidone (PVP) membranes. Pure water fluxes of PSf/PANiEB membranes were 1.7–2.8 times that of PSf membrane while rejection property including bovine serum albumin, egg albumin and trypsin rejections changed slightly. BSA ultrafiltration experiment showed that PSf/PANiEB membranes had higher flux and better antifouling property than PSf membrane.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Naeem Akhtar Qaisrani,Lingling Ma,Jiafei Liu,Manzoor Hussain,Lv Li,Panyue Li,Shoutao Gong,Fengxiang Zhang,Gaohong He
The anion exchange membranes (AEM) is one of the key components for alkaline electrolyte membrane fuel cells. However, poor alkaline stability and conductivity of the membrane greatly hinders its practical application. Herein, we report a novel 4-(dimethylamino)butyraldehyde diethyl acetal (DABDA) quaternized polysulfone AEM, or PSf-DABDA, which shows improved conductivity and alkaline stability due to the better hydrophilicity and the electron donating effect imparted by the long alkyl substituent with two ether-containing moieties in the cation structure. Its room temperature conductivity reaches 21 mS/cm while that of trimethylamine (TMA)- and dimethylbutylamine (DMBA) quaternized AEMs with comparable ion exchange capacity (IEC) is 11.8 and 13.2 mS/cm, respectively. When treated 150 h in 1 M NaOH at 60 °C, the PSf-DABDA membrane experiences a slight conductivity decrease of 5% while the PSf-TMA and PSf-DMBA membranes with a comparable IEC suffer a more serious conductivity decay of 19 and 13.5%, respectively. The better alkali stability of PSf-DABDA over its counterparts is further confirmed by a density functional theoretical study and a structural characterization before and after the alkali treatment. Our work demonstrates the advantage of the DABDA cation by both experimental and computational study; it presents a new possibility of improving AEM conductivity and stability.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
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2020
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IF 3.35
Zexian Zhu,Dongqing Liu,Sizhou Cai,Yankun Tan,Jing Liao,Yuanjian Fang
Two multi-amine, metformin (MTM) and polyethyleneimine (PEI), were used to prepare separative layer of composite membrane through chemical deposition with tea polyphenols (Tph), an inexpensive mixture of nature polyphenols, on a hybrid polysulfone (Psf) membrane. The supporting layer was a blend membrane of Psf, coupling agent treated sepiolite and cetyltrimethylammonium bromide (CTAB). Sepiolite and the surfactant improved surface hydrophilicity of membrane. Pure water flux (PWF) of membranes was increased from 33.97 to 611.46 L m −2 h −1 bar −1 . The optimum mass ratio for MTM to Tph and PEI to Tph were 9.4:1 and 2.4:1 in chemical deposition reaction, respectively. MTM-Tph (MT) surface was negative charged while PEI-Tph (PT) was positive charged. Monomer reactivity determined the thickness of functional layer. Both composite membranes showed dyes rejection capacity at 1 bar. PT layer was thicker than MT, so did its rejection for dyes. The rejection of PT for 5 dyes were all higher than 98% and remained at 99.3% and 98.6% in 200 h for Congo red (CR) and neutral red (NR). PT membrane displayed the potential in textile waste water treatment.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2013
·
IF 4.093
Guoliang Zhang,Shufei Lu,Liang Zhang,Qin Meng,Chong Shen,Jiwei Zhang
Hybrid membranes formed by blending TiO 2 nanoparticles and organic materials are attractive for creating new materials with enhanced properties such as high permselectivity, good hydrophilicity and excellent fouling resistance in a wide range of applications. In order to overcome the agglomeration of nanoparticles in membranes and leakage of nanoparticles from nanocomposite membranes in the water treatment process and enhance the hydrophilicity of membranes, polymer chains of HEMA (2-hydroxyethyl methacrylate) were grown from TiO 2 by the atom transfer radical polymerization (ATRP) process in methanol. The hybrid polysulfone (PSF) membranes were then prepared by adding different ratios of TiO 2 (T membranes) and TiO 2 -g-HEMA (HT membranes) particles via phase inversion induced by the immersion precipitation technique. The modification nanoparticles were found to provide obvious improvements in reducing the particles agglomeration and fouling in sheet membranes. Different techniques such as SEM, TEM , FTIR, EDS, contact angle goniometry and filtration experiments of water, BSA and EPS were applied to characterize and explore the performance of particles and membranes. Compared with unmodified TiO 2 particles, modified TiO 2 particles held enhanced hydrophilicity, better compatibility and dispersibility in organic solvent and matrix polymer . Similarly, the HT membranes exhibited superior water flux and anti-pollution performance in separation than the pure PSF membrane and T membranes.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）