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In Situ Self-growing of Thermoplastics into Strong and Tough Thermosets Based on Dynamic Imidazole-urea Moiety

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Chinese Journal of Polymer Science 2025年第3期43卷 488-494页

作者： Jian-Ye Zhang Xin-Yu Xu Qiao Sun Ling Liu Zeng-He Liu Yu-Tian Zhu College of material Chemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material TechnologyMinistry of EducationHangzhou Normal UniversityHangzhou 311121China

Thermosets are indispensable to our daily life,but their crosslinked structures make them unable to be processed by the melt processing like thermoplastics,which greatly limits their shape designs and ***,we address this challenge via an in situ self-growing strategy,*** the dynamic imidazole-urea moiety to suck up and integrate epoxy into the materials and making the thermoplastics grow in situ into *** this strategy,thermosets can be readily processed via hot-melt extrusion molding,including melt spinning and fused deposition modeling 3D *** importantly,this strategy simultaneously integrates the flexibility of polyurethane and the robustness of epoxy resin into the resulting thermosets,yielding a mechanical-reinforcing effect to make the material not only strong but also tough(toughness:99.3 MJ·m^(-3),tensile strength:38.8 MPa).Moreover,the crosslinking density and modulus of the as-prepared thermosets(from 34.1 MPa to613.7 MPa)can be readily tuned on demand by changing the growth ***,these thermosets exhibited excellent thermal stability and chemical resistance.

关键词： Dynamic bond Self-growing Imidazole-urea Thermoset

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Supramolecular Ion Channel with Controlled K^(+)/Na^(+)Transport Behaviors

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Chemical Research in Chinese Universities 2025年第1期41卷 95-100页

作者： HE Lei LUO Yichen ZHANG Yang YAN Tengfei LIU Junqiu College of material Chemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material Technology of Ministry of EducationKey Laboratory of Organosilicon Material Technology of Zhejiang ProvinceHangzhou Normal UniversityHangzhou310036P.R.China

Dysfunction of ion channels,often caused by mutations in natural proteins,can lead to various *** artificial analogs have shown great promise to substitute the abnormal ***,we report a supramolecular potassium channel that forms through the self-assembly of pyrene-crown ether conjugated by intermolecularπ-π*** self-assembled dimer of this channel was optimized and calculated to have a binding energy of−27.4 kcal/mol(1 kcal=4.18 kJ).Evidence for the formation of an active ion channel by PC5 was confirmed using a planar lipid bilayer(BLM)workstation,while no such activity was observed for *** K^(+)/Na^(+) selectivity was reversed in the reduced form,R-PC5,due to the elimination of the planar structure of PC5,resulting in R-PC5 functioning as a Na+***,incorporating the pyrene group facilitates imaging in living cells,providing a potentially viable method for investigating the behaviors of artificial ion channels in living systems.

关键词： Crown ether Pyrene Ion transport Self-assembly

Green synthesis of carbon dots by microflow method and their application as sunscreen agent

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Chinese Journal of Chemical Engineering 2025年第1期77卷 135-143页

作者： Ziyang Li Zhikun Miao Jie Shen Jing Wang Liangliang Lin key laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122China

Sunscreen agents derived from plants have been regarded as promising alternatives to artificial *** this work,carbon dots(CDs)were prepared from carrot juice via a continuous microflowbased approach,where the influence of process parameters was studied and *** characterization revealed the CDs not only have small size,narrow size distribution,and good water solubility,but also have abundant functional groups as well as excellent UV absorption *** on these properties,the CDs were used as UV absorbers,suggesting they have strong long-term UV absorption ability over a broad pH *** UV-absorption properties of the CDs were confirmed by incorporating the CDs in polyvinyl alcohol(PVA)to get C-CDs@PVA films of different thickness,in which significantly enhanced UV absorption performance was ***,the sun protection performance is also related to the film ***,the practical application of the CDs was evaluated by adding them in a typical skin *** the addition of the CDs,the cream has drastically reduced UV transmittance in both UVA and UVB regions,and exhibits better UV absorption performance than commercial sunscreen *** CDs also demonstrated low cytotoxicity and high DPPH radical scavenging activity,making them promising as green sunscreen *** work is expected to provide a guidance for the development of green and effective natural sunscreen agents via microflowbased method.

关键词： Carbon dot Microflow synthesis Sunscreen agent Optimization Nanoparticles Chemical processes

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Mussel-bionic fiber@ZnO composite membrane for self-cleaning antibacterial mask

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Nano Research 2025年第3期18卷 9-21页

作者： Yong Wang Wen-Bo Zhao Fu-Kui Li Shulong Chang Bao-Shuai Shi Lin Jia Kai-Kai Liu Chong-Xin Shan Henan key laboratory of Diamond Optoelectronic materials and Devices Key Laboratory of Material PhysicsMinistry of EducationSchool of PhysicsZhengzhou UniversityZhengzhou 450052China Institute of Quantum materials and physics Henan Academy of Sciences Zhengzhou 450046China

The COVID-19 pandemic has underscored the significance of antibacterial protective *** high-performance antibacterial masks proves to be effective in preventing the spread of respiratory ***,we demonstrate a self-cleaning antibacterial mask constructed from the fiber@ZnO composite membrane,utilizing the strong interfacial adhesion of polydopamine(PDA).With a ZnO NPs immersion solution concentration of 1.0 mg/mL,the ZnO NP content in fiber@ZnO reaches 6.5%.The fiber@ZnO demonstrates bactericidal rates exceeding 99%against Gram-positive(***)and Gram-negative(***)bacteria,and exhibits an inhibition rate exceeding 99.99%against the H1N1 influenza *** hydrogen bonding and electrostatic interaction between ZnO nanoparticles(NPs)and PDA can keep a stable combination of NPs and *** masks constructed by the fiber@ZnO composite membrane exhibit superior self-cleaning performance and effectively eliminate pathogenic bacteria in aerosols compared with commercial N95 *** mussel-bionic strategy presents a viable approach for developing novel antibacterial fibers,with significant application potential in reducing the risk of human infection and preventing the re-transmission of pathogens.

关键词： antibacterial mask biomimetics fiber ZnO nanoparticles

Triboelectric nanogenerator based on changing the nanomorphology of polyoxometalates for gait monitoring of teenagers

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Nano Research 2025年第2期18卷 776-788页

作者： Yijia Hao Tuo Ji Jing Zhang Weilin Chen key laboratory of Polyoxometalate and Reticular material Chemistry of ministry of education Northeast Normal UniversityChangchun 130024China

Timely monitoring abnormal gaits of teenagers is crucial for their physical health and *** nanogenerators(TENGs)are widely used in the wearable *** high-performance and safe triboelectric materials to monitor abnormal gaits remains ***(POMs)nanomaterials can effectively serve as triboelectric materials due to rich surface morphology and large specific surface ***,six different sized POMs nanorods(Ag_(4)SiW_(12)O_(40)·nH_(2)O)synthesized through self assembly of POMs(H4SiW12O40·nH2O)were used as triboelectric *** TENG composed of nanorod with a diameter of 100 nm and a length of 400–1000 nm has optimal performance with the voltage,current density and charge are 104.3 V,1127.1μA·m^(-2),and 15.38 nC,respectively,which are more than two times of the TENG composed of POMs(H_(4)SiW_(12)O_(40)·nH_(2)O).The optimized TENG maintained a voltage of around 100 V throughout the 1000 s stability *** maximum power amounts to 25.2μW at 500 MΩexternal *** reasons for the improved performance of nanorods TENG compared to POMs TENG are the increase in roughness and surface potential,which was confirmed through atomic force microscopy(AFM)and kelvin probe force microscopy(KPFM)***,optimized TENG was applied to the feet of different teenagers and the left and right feet of the same person to monitor abnormal *** changes in voltage can sensitively display the inconsistency and abnormal situations of *** study confirms the potential and unique advantages of POMs nanomaterials as triboelectric materials and provides a design scheme for gait monitoring.

关键词： polyoxometalates polyoxometalates nanomaterials nanorods triboelectric nanogenerator

Unraveling atomistic and electronic origins of multiaxial magnetic anisotropy

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Science China(physics,Mechanics & Astronomy) 2025年第2期68卷 175-182页

作者： Boyu Liu Xueyang Li Junsheng Feng Changsong Xu Hongjun Xiang key laboratory of Computational Physical Sciences(ministry of education) Institute of Computational Physical SciencesState Key Laboratory of Surface Physics and Department of PhysicsFudan UniversityShanghai200433China Shanghai Qi Zhi Institute Shanghai200030China School of physics and material Engineering Hefei Normal UniversityHefei230601China

Multiaxial magnetic anisotropy(MA)refers to the phenomenon that multiple axes of the magnetic crystal correspond to different energy *** with the common uniaxial magnetic anisotropy,multiaxial MA facilitates novel forms of applications in ***,by combining the first-principles-based spin Hamiltonian and tight-binding(TB)method,we reveal the microscopic origins,instead of the common phenomenological understanding,of biaxial MA and triaxial *** the example system of NiO,it is found that the multiple minima result from the fourth-order and the sixth-order single ion interactions,while the difference between[110]and[110]directions originates from a second-order bond-dependent anisotropic pair interaction(i.e.,the so-called Gamma interaction).Moreover,through the application of a newly developed general spin dependent TB approach,it is revealed that the triaxial MA arises from the special spin-orbital entangled Hund term,which is different from the orbital-independent Hund term in the usual Slater Koster TB *** work thus not only leads to a thorough understanding of the multiaxial MA in NiO,but also establishes a methodology that can be widely used to explore the microscopic origins of MA in different magnets.

关键词： multiaxial magnetic anisotropy origin of multiaxial magnetic mnisotropy effective spin Hamiltonian tight-binding model antiferromagnetism

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Simultaneous Solar-Driven Interfacial Evaporation and Photo-Fenton Oxidation by Semiconducting Metal–Organic Framework From Waste Polyimide

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Energy & Environmental materials 2025年第2期8卷 246-258页

作者： Lijie Liu Huajian Liu Zifen Fan Jie Liu Xueying Wen Huiyue Wang Yan She Guixin Hu Ran Niu Jiang Gong key laboratory of material Chemistry for Energy Conversion and Storage Ministry of Education Hubei Key Laboratory of Material Chemistry and Service Failure Hubei Engineering Research Center for Biomaterials and Medical Protective Materials School of Chemistry and Chemical EngineeringHuazhong University of Science and Technology

The integrated technology of interfacial solar steam generation and photo-Fenton oxidation has emerged as a promising way to simultaneously mitigate freshwater scarcity and degrade organic ***,fabricating low-cost,multi-functional evaporators with high water evaporation and catalytic ability still presents a significant ***,we report the functional upcycling of waste polyimide into semiconducting Fe-BTEC and subsequently construct Fe-BTEC-based composite evaporators for simultaneous freshwater production and photo-Fenton degradation of ***,through a two-step solvothermal-solution stirring method,Fe-BTEC nanoparticles with the size of 20-100 nm are massively produced from waste polyimide,with a band gap energy of 2.2 *** composite evaporator based on Fe-BTEC and graphene possesses wide solar-spectrum absorption capacity,high photothermal conversion capacity,rapid delivery of water,and low enthalpy of *** from the merits above,the composite evaporator achieves a high evaporation rate of 2.72kgm-2h-1from tetracycline solution,as well as the photothermal conversion efficiency of 97% when exposed to irradiation of 1 Sun,superior to many *** is more,the evaporator exhibits the tetracycline degradation rate of 99.6% with good recycling stability,ranking as one of the most powerful heterogeneous Fenton *** Multiphysics and density functional theory calculation results prove the synergistic effect of the concentrated heat produced by interfacial solar steam generation and catalytic active sites of Fe-BTEC on promoting H2O2activation to form reactive oxidation *** work not only provides a green strategy for upcycling waste polyimide,but also proposes a new approach to fabricate multi-functional evaporators.

关键词： freshwater production interfacial solar steam generation metal–organic framework photo-Fenton oxidation waste polyimide

Synthesis,electronic property,and negative thermal expansion in cubic CaTiF_(6)

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Nano Research 2025年第3期18卷 333-340页

作者： Kaiyue Zhao Peixian Zhang Yixin Jiao Fei Wang Juan Guo Yongqiang Qiao Qiang Sun Qilong Gao key laboratory of materials physics of ministry of education and School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052China

Double ReO_(3)-type fluorides exhibit greater structural flexibility and elemental tunability than their single ReO_(3)-type counterparts,drawing widespread interest in applications involving negative thermal expansion(NTE)and ***,their applications are extremely constrained by the scarcity of the materials themselves,the harsh preparation conditions,and the high cost of the requisite raw *** this work,we have successfully obtained the cubic phase CaTiF_(6)more facilely with inexpensive CaCl_(2) and H2TiF_(6).The ultraviolet-visible(UV-vis)absorption spectrum indicates a bandgap of 3.6 eV and semiconducting *** spectroscopy analysis reveals the structure from rhombic to cubic transformation around 138 K,accompanied by a significant isotropic NTE in the cubic phase,with a coefficient ofαl=−7.26×10^(−6)K^(−1)(175-475 K).Theoretical calculations based on first principles indicate that the semiconducting properties originate from the hybridization of the 3d orbit of Ti and the 2p orbit of *** driving force for NTE in CaTiF_(6)comes from the transverse thermal vibrations of fluorine atoms,as confirmed by density functional theory(DFT)*** research provides a novel,facile,and cost-effective synthetic way and reveals in depth the electronic properties and NTE mechanism of CaTiF_(6),which dramatically promotes the development of Ti-based fluorides.

关键词： negative thermal expansion fluorides chemical synthesis first principles calculations

Carbon nanodot-based flexible and self-powered white displays

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Nano Research 2025年第2期18卷 733-740页

作者： Wei Zhang Qing Lou Junlu Sun Juan Liao Guangsong Zheng Fuhang Jiao Wu Chen Xiang Li Jiajia Meng Chong-Xin Shan Lin Dong Henan key laboratory of Diamond Optoelectronic materials and Devices Key Laboratory of Materials PhysicsMinistry of EducationSchool of PhysicsZhengzhou UniversityZhengzhou 450052China

Carbon nanodots(CDs)have emerged as a promising luminescent material,showing significant potential in biological imaging,information security,and illumination displays withintheinternet of things(loT).However,CDs-based electroluminescent devices,especially flexible and self-powered white displays,remain scarcely reported,which limit their applications in human-machine interactions and wearable optoelectronics in the ***,we present a pioneering CDs-based flexible and self-powered white display system with a Commission Internationale de L'Eclairage(CIE)coordinate of(0.31,0.39)by integrating CDs-based alternating current electroluminescent(AcEL)devices with triboelectric *** CDs-based white ACEL devices can be dynamically modulated from light green to white under various supplied frequencies ranging from 50 to 500 *** devices also render from cold white to warm white with correlated color temperature from 9705 to 4538 K,as the concentration ratios of ZnS:Cu phosphors to CDs change from 22:2 to 22:***,these devices exhibit excellent flexibility and stability,maintaining over 95%of their electroluminescent intensities after 4500 cycles even under a large bending angle of 180°with a bending radius of 4.9 ***,this CDs-based flexible and self-powered white display system is worn on the human body to realize real-time illumination display powered by biomechanical energy,such as hand slapping and *** work provides a novel design strategy toward high-performance CD-based flexible and self-powered white displays and expands their potential applications in wearable optoelectronics for the loT.

关键词： carbon nanodot(CD) self-powered system alternating current electroluminescence white display flexible devices