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Highly-efficient separation of pyromellitic acid and trimellitic acid mixtures via forming deep eutectic solvents:Experiment and calculation

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Chinese Journal of chemical engineering 2024年第12期76卷 42-48页

作者： Wanxiang Zhang Lixia Ji Yucui Hou Shuhang Ren Weize Wu State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing 100029China Department of Chemistry and Materials Taiyuan Normal UniversityShanxi 030619China

Pyromellitic acid(PMA)and trimellitic acid(TMA)are significant chemical raw materials and *** simultaneously exist in the industry processes of synthesis and are difficult to be *** this work,several kinds of biodegradable compounds were chosen as hydrogen bond acceptors(HBAs)to separate PMA and TMA mixtures from acetone solutions via forming deep eutectic solvent(DES).It has been found that all these compounds can separate PMA and TMA mixtures to obtain pure PMA or ***,the interaction between HBAs and PMA or TMA is quite *** chloride cannot extract TMA but can form a DES with PMA in ***(HA)and L-carnitine(L-car)can form DESs with both PMA and TMA in acetone *** when L-car or HA is added,the extraction rate of PMA is larger than that of TMA until the extraction rate of PMA reach 100%,and pure TMA is left in the acetone *** selective separation mechanism was explored by infrared spectroscopy combined with quantum chemistry calculation,and the strength and site of the interaction between extractants with PMA and TMA were calculated.

关键词： Separation Pyromellitic acid Trimellitic acid Deep eutectic solvent Quantum chemistry calculation

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Multiblock poly(ether-b-amide)copolymers comprised of PA1212 and PPO-PEO-PPO with specific moisture-responsive and antistatic properties

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Chinese Journal of chemical engineering 2023年第1期53卷 421-430页

作者： Jie Jiang Wei Cheng Qiuyu Tang Xun Pan Jinjin Li Ling Zhao Zhenhao Xi Weikang Yuan State Key Laboratory of Chemical Engineering School of Chemical EngineeringEast ChinaUniversity of Science and TechnologyShanghai 200237China Shanghai Key Laboratory of Multiphase Materials Chemical Engineering East China University of Science and TechnologyShanghai 200237China Flinders Institute for Nanoscale Science and Technology Flinders UniversitySA 5042Australia College of Chemistry and Chemical Engineering Xinjiang UniversityUrumqi 830046China

Functional multiblock poly(ether-b-amide)(PEBA)copolymers,comprised of PA1212(polyamide 1212)as hard segments and Jeffamine ED-2003 as soft segments,were successfully prepared via two-step melt polycondensation without any amidation ***,using diamino-terminated poly(propylene oxide)-poly(ethylene oxide)-poly(propylene oxide)(PPO-PEO-PPO),Jeffamine ED-2003,enhances the compatibility between polyamide oligomer and polyether,which is better than the traditional route using hydroxyl-terminated *** chemical structure of multiblock PEBAs,as well as the microphase separated structure with crystalline phase of polyamide and polyether,were confirmed by heteronuclear multiple-bond correlation spectrum,heteronuclear multiple quantum correlation spectrum,Fourier transform infrared spectroscopy(FT-IR),differential scanning calorimetry and dynamic mechanical *** hydrophilic PEBA copolymers showed water adsorption ranging from 87.3%to 17.1%depending on the polyether content,and specially showed moisture responsive behavior within seconds when exposed to *** corresponding mechanism was studied using time-resolved attenuated total reflectance FT-IR spectroscopy in the molecular level and the water diffusion coefficient was estimated to be 1.07×10^(–8)cm^(2)∙s^(-1).Two-dimensional correlation FT-IR spectra analysis was performed to confirm that the interaction between water and polyether phase was in preference to that between water and polyamide matrix,and water molecule only forms hydrogen bond with the polyether *** to the incorporation of PEO segments,the PEBAs have the surface resistivity varying from 5.6×10^(9)to 6.5×10^(10)Ω,which makes PEBA potential candidate as permanent antistatic agent.

关键词： Poly(ether-b-amide)s Moisture-responsive Antistatic In situ FT-IR 2D FT-IR analysis

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High-performance Flow Chemistry Platform for Scalable Continuous Synthesis of Branched Block Copolymers with Precise Chain Structures

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Chinese Journal of Polymer Science 2025年第3期43卷 457-467页

作者： Bang-Bang Wang Zhuang Zhang Jing-Tao Wang Li Pan Yue-Sheng Li Dong-Po Song Tianjin Key Laboratory of Composite and Functional Materials School of Materials Science and EngineeringTianjin UniversityTianjin 300350China School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China

Cutting-edge research has primarily focused on flow synthesis of linear block copolymers,lacking the ability for manipulating chain architectures for more extensive ***,we develop a flow chemistry platform for the continuous microflow synthesis of bottlebrush block copolymers(BBCPs)using a grafting-through *** involves performing ring-opening metathesis polymerization(ROMP)of two different macromonomers within two microfluidic reactors connected in *** microflow environment allows for complete monomer conversion within a few tens of seconds,benefiting from the superior mixing efficiency achieved in Z-shaped channels as indicated by both theoretical simulations and experimental ***,a library of well-defined BBCPs of up to 528 distinct samples can be produced within one day through automation of the continuous procedure,while keeping precise control on degree of polymerization(DP<4)and polydispersity indices(PDI<1.2).The synthetic method is generally applicable to different macromonomers with different compositions and contour lengths,yielding libraries of branched block copolymers with great diversity in physiochemical properties and chain *** work presents a powerful platform for high-throughput production of branched copolymers,significantly lowering the costs of the materials for real applications.

关键词： Continuous flow synthesis Ring opening metathesis polymerization Branched copolymer

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Correlation of adsorbent cavity structure with adsorption behavior and interaction of long-chainα-olefin/paraffin on microporous adsorbents

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Nano Research 2023年第4期16卷 5721-5732页

作者： Ruihan Yang Fangyu Zhao Shafqat Ullah Xiao Chen Junxiang Ma Yuan Gao Yujun Wang Guangsheng Luo State Key Lab of Chemical Engineering Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Lu’an Chemical Group CO. LTD.Changzhi 046299China

Long-chainα-olefins have a high added value as important raw materials for many highly marketable ***-Tropsch synthesis products contain ultrahigh-contentα-olefins,which are of great value if the challenging separation ofα-olefin/paraffin is achieved through energy-saving ways,for which adsorption separation is an attractive *** of the most significant differences between the adsorption separation of long-chain and light hydrocarbons is the steric hindrance of the molecular ***,we propose a combination of window size,metal node spacing,and bending degree to quantitatively describe the adsorption cavity structure for the separation of long-chainα-olefin/*** general cavity structural characteristics of microporous materials with good separation performance for long-chainα-olefin/paraffin are *** selective adsorption of liquid C6 and C_(8)α-olefin/paraffin mixtures on CuBTC(BTC=benzene-1,3,5-tricarboxylate)was studied in detail to reveal the influence of the cavity structure on the adsorption and interaction using a combination of batch adsorption experiments and molecular simulation *** exhibited 360 and 366 mg/g olefin adsorption capacities for C6 and C8 linearα-olefins,*** adsorption energies were−0.540 and−0.338 eV for C8 linearα-olefin and paraffin,*** contributions of different types of interactions to the overall adsorption energy were quantified to illustrate the adsorption energy difference betweenα-olefin/paraffin and *** work provides a new understanding of the long-chain hydrocarbon adsorption behavior different from ethylene/ethane and propylene/propane,which guides the design of adsorbents forα-olefin/paraffin separation.

关键词： linearα-olefin adsorption cavity structure metal-organic framework liquid-phase adsorption molecular simulations principal orbital interaction

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Novel electriferous charge-mosaic S(TMC@Lys-Li)separator towards efficient Li^(+)fast-transfer for high-energy density and long-duration lithium-sulfur batteries

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Journal of Energy Chemistry 2025年第3期102卷 197-207页

作者： Lei Ding Dandan Li Sihang Zhang Zhaoyang Wang Pengfang Zhang Fanghui Du Shuyue Zhao Daoxin Zhang Feng Yang Shuo Zhang Shandong Key Laboratory of Chemical Energy Storage and New Battery Technology School of Chemistry and Chemical EngineeringLiaocheng UniversityLiaocheng 252000ShandongChina School of Food Science and Engineering Hainan UniversityHaikou 570228HainanChina State Key Laboratory of Polymer Materials Engineering College of Polymer Science and EngineeringSichuan UniversityChengdu 610065SichuanChina College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina

Lithium-sulfur(Li-S)batteries with attractive capacity give remarkable potential for prospective high-capacity application scenarios but suffer a fatal flaw of short cyclability before large-scale commercialization especially owing to polysulfide(Li_(2)S_(n))transmembrane *** efficiently restrain chronic Li_(2)S_(n) shuttle and expedite Li^(+)transfer,herein,a novel electriferous charge-mosaic S(TMC@Lys-Li)separator preparation approach is *** polymerizations of lithiated lysine and trimesoyl chloride establish an electriferous charge-mosaic polyamide functional *** Li within the charge-mosaic layer offers transition or replacement sites for smoothing Li^(+)migrations,which constructs efficient Li^(+)fast-transfer private channels and accelerates the Li^(+)transfer rate to 9.4 *** charged polyamide skeleton synchronously heightens Li_(2)S_(n) rejections by combining Donnan and steric effects.S(TMC@Lys-Li)replenishes Li for homogenizing Li nucleation and growth,endowing stable plating/stripping behaviors over 250 cycles for Li-Cu *** Li-S cells thus exhibit excellent specific capacity and cyclability at multiple application scenarios such as long periods,high areal capacity,and fast charge,holding 78.1%retention after 500 cycles at 1 *** superior thermal stability and self-discharge of S(TMC@Lys-Li)dramatically strengthen battery thermal runaway resistance even at155℃,which ensures security for Li-S battery high-power and high-temperature *** alluring features enable charge-mosaic separators to be potentially adopted in practical Li-S batteries demanding strict security,high-capacity density,and fast charge technology.

关键词： Lithium-sulfur battery separator Polysulfide barrier Li*fast-transfer private channels Multifunctional

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Effect of hydrogen impurities on hydrogen oxidation activity of Pt/C catalyst in proton exchange membrane fuel cells

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Clean Energy 2023年第1期7卷 139-147页

作者： Yufeng Qin Chaoyong Sun Shaojie Ke Rou Wen Yifan Wang Jing Ji Meiling Dou State Key Laboratory of Chemical Resource Engineering Laboratory of Electrochemical Process and Technology for materialsBeijing University of Chemical TechnologyBeijing 100029China

High-purity of hydrogen is vital to the guarantee of end usage in proton exchange membrane fuel cell(PEMFC)electric vehicles(EVs)with superior durability and low ***,the currently employed hydrogen,primarily from fossil fuel,still contains some poisoning impurities that significantly affect the durability of ***,we investigate the poisoning effect of several typical hydrogen impurities(S^(2-),Cl^(-),HCOO^(-)and CO_(3)^(2-))on the hydrogen oxidation reaction(HOR)of the state-of-the-art carbon-supported platinum(Pt/C)catalyst used in the PEMFC *** results indicate that the electrochemically active surface area of Pt/C is hampered by these hydrogen impurities with reduced effective Pt reactive sites due to the competitive adsorption against hydrogen at Pt sites showing the extent of the poisoning on Pt sites in the order:S^(2-)>Cl^(-)>HCOO^(-)>CO_(3)^(2-).Density functional theory calculations reveal that the adsorption energy of S2-on Pt(111)is greater than that of Cl^(-),HCOO^(-)and CO_(2),and the electronic structure of Pt is found to be changed due to the adsorption of impurities showing the downshift of the d-band centre of Pt that weakens the adsorption of hydrogen on the Pt *** work provides valuable guidance for future optimization of hydrogen quality and also emphasizes the importance of anti-poisoning anode catalyst development,especially towards H_(2)S impurities that seriously affect the durability of PEMFCs.

关键词： hydrogen impurity poisoning effect electronic structure Pt/C hydrogen oxidation catalysis fuel cell

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Modifying metabolic and immune hallmarks of cancer by a copper complex

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Science China Chemistry 2025年第3期68卷 1051-1066页

作者： Chengyan Chu Yunhua Zhang Chengyuan Qian Xiu-Zhi Yang Yicun Shang Zijian Guo Xiaoyong Wang State Key Laboratory of Pharmaceutical Biotechnology School of Life SciencesNanjing UniversityNanjing 210023China State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

Metabolic adaptation of cancer cells is a key tactic for maintaining their tumorigenicity and viability in the tumor immune microenvironment(TIME).Concurrent modulation on the metabolic pathway and immune system could change the living condition of cancer cells and potentiate the efficacy of anticancer drugs.A copper complex(DDCu)was designed to influence the energy metabolism of cancer cells and reshape the *** restrained the production and transportation of lactate by inhibiting the expression of lactate dehydrogenase and monocarboxylate transporter 4,thereby altering the metabolic pathway of cancer cells and improving the acidic tumor ***,DDCu was reduced to Cu~+by cellular glutathione to react with lipoylated proteins of the tricarboxylic acid cycle and destabilize the Fe-S cluster proteins,leading to the aggregation of dihydrolipoamide S-acetyltransferase and cuproptosis in cancer ***,DDCu promoted the polarization of macrophages from the M2 to M1 phenotype,activated CD4^(+)and CD8^(+)T cells,and reversed the *** a result,DDCu inhibited the tumor growth through a synergy between metabolic regulation and immunomodulation.

关键词： cancer hallmark copper complex cuproptosis lactate metabolism immunomodulation

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Preparation of magnetic-oriented electronic packaging composite materials with improved thermal conductivity and insulating properties by filling magnetic BN@Fe_(3)O_(4)core-shell particles into epoxy

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High Voltage 2025年第1期10卷 219-227页

作者： Zeyu You Ling Weng Lizhu Guan Xiaorui Zhang Zijian Wu Hao Chen Wei Zhao School of Material Science and Chemical Engineering Harbin University of Science and TechnologyHarbinChina Key Laboratory of Engineering Dielectrics and Application Ministry of EducationHarbin University of Science and TechnologyHarbinChina

Epoxy resin(EP),as a resin material with excellent insulation performance,has been widely applied in fields such as electronics,coatings,ships ***,epoxy resins generally have poor thermal conductivity,which limits their application in the field of new generation of electronic *** address the key issues mentioned above,the BN@Fe_(3)O_(4)particles with positive out-of-plane thermal conductivity were successfully prepared in this study,having a core-shell structure with rough surfaces as *** a thermal conductive powder,the disadvantage of hexagonal boron nitride being easily agglomerated in resin has been *** applying an external magnetic field,three-dimensional thermal conduction pathways were constructed in the *** physical and chemical properties of the BN@Fe_(3)O_(4)powder and its composite materials were analysed and *** experiment indicates that the thermal conductive magnetic powder BN@Fe_(3)O_(4)had been successfully *** the filling amount of BN@Fe_(3)O_(4)reached 27.5 vol%,the out-of-plane thermal conductivity of the composite material was 1.758 W m^(-1)K^(-1),which was 982.12%that of pure *** this point,the mechanical behaviour and insulation performance of EP composite materials can be effectively guaranteed at the same order of magnitude as pure EP performance.

关键词： composite conductivity thermal

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Self-derivation and reconstruction of silver nanoparticle reinforced cobalt-nickel bimetallic hydroxides through interface engineering for overall water splitting

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Journal of Energy Chemistry 2024年第3期90卷 590-599,I0013页

作者： Yan Li Jie Han Weiwei Bao Junjun Zhang Taotao Ai Mameng Yang Chunming Yang Pengfei Zhang National and Local Joint Engineering Laboratory for Slag Comprehensive Utilization and Environmental Technology School of Materials Science and EngineeringShaanxi University of TechnologyHanzhong 723000ShaanxiChina State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering College of Chemistry&Chemical EngineeringNingxia UniversityYinchuan 750021NingxiaChina College of Chemistry&Chemical Engineering Yan’an UniversityYan’an 716000ShaanxiChina School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Designing efficient and long-lasting non-metal electrocatalysts is an urgent task for addressing the issue of kinetic hysteresis in electrochemical oxidation *** bimetallic hydroxides,catalyzing the oxygen evolution reaction(OER),have significant research potential because hydroxide reconstruction to generate an active phase is a remarkable ***,the complete reconstruction of ultrathin CoNi(OH)_(2) nanosheets was achieved by embedding Ag nanoparticles into the hydroxide to induce a spontaneous redox reaction(SRR),forming heterojunction Ag@CoNi(OH)_(2) for bifunctional *** calculations and in situ Raman and ex situ characterizations revealed that the inductive effect of the Ag cation redistributed the charge to promote phase transformation to highly activate Ag-modified *** Co-Ni dual sites in Co/NiOOH serve as novel active sites for optimizing the intermediates,thereby weakening the barrier formed by OOH^*.Ag@CoNi(OH)_(2) required a potential of 1.55 V to drive water splitting at a current density of 10 mA cm^(-2),with nearly 98.6% Faraday *** ion induction and triggering of electron regulation in the OER via the synergistic action of the heterogeneous interface and surface reconstruction,this strategic design can overcome the limited capacity of bimetallic hydroxides and bridge the gap between the basic theory and industrialization of water decomposition.

关键词： Surface reconstruction Bimetallic hydroxides Ag nanoparticle Operando Raman Overall water splitting

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Au/TS-1 catalyst for propylene epoxidation with H_(2)and O_(2):Effect of surface property and morphology of TS-1 zeolite

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Nano Research 2023年第5期16卷 6278-6289页

作者： Jialun Xu Zhihua Zhang Daiyi Yu Wei Du Nan Song Xuezhi Duan Xinggui Zhou State Key Laboratory of Chemical Engineering East China University of Science and TechnologyShanghai 200237China

The catalytic performances over propylene epoxidation with H_(2)and O_(2)(HOPO process)are significantly affected by the properties(e.g.,surface properties,Ti coordination,morphology)of titanosilicate *** urea into zeolite synthesis is a simple and convenient method to modify these properties of titanosilicate *** pore-blocked titanium silicalite-1(TS-1,i.e.,TS-1-B)with the lower urea dosage possesses more defective structure and unsaturated coordinated Ti sites verified by 29Si nuclear magnetic resonance(NMR)and X-ray photoelectron spectroscopy(XPS)analysis,which results in a high initial activity and hydrogen efficiency;while the high surface acidity generated by these Ti species leads to a continuous decrease in the activity and the propylene oxide(PO)selectivity during the *** the amount of urea gradually increases,the TS-1-B samples present the reduced surface defects and defective and unsaturated Ti ***,TS-1-B-0.30U presents the weaker PO adsorption on PO-diffusion reflectance infrared Fourier transform spectra(DRIFTS),thus results in the high stable PO formation rate and selectivity over its Au ***,a flat-plate-like shape with a shorter thickness of 100 nm along the b-axis direction is observed on the urea-modified *** with the conventional ellipsoidal TS-1 with crystal sizes of 200 and 500 nm,the flat-plate-like TS-1-0.30U displays the less surface defects,unsaturated Ti species,the weaker Lewis acid,which is favorable for the desorption and intracrystalline diffusion of PO,thus reduces the occurrence of side reactions for the improved selectivity and *** work may provide a reference for developing titanium-containing materials with high activity and stability over HOPO reaction.

关键词： propylene epoxidation titanium silicalite-1(TS-1) surface properties Ti species morphological regulation diffusion

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