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Impact of Hard Segment Structures on Fatigue Threshold of Casting Polyurethane Using Cutting Method

Chinese Journal of Polymer science 2025年第2期43卷 303-315页

作者： Guang-Zhi Jin Le-Hang Chen Yu-Zhen Gong Peng Li Run-Guo Wang Fan-Zhu Li Yong-Lai Lu State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing100029China Engineering Research Center of Elastomer Materials Energy Conservation and Resources Ministry of EducationBeijing100029China Key Laboratory of Carbon Fiber and Functional polymers Beijing University of Chemical TechnologyBeijing100029China Center of Advanced Elastomer Materials College of Material Science and EngineeringBeijing University of Chemical TechnologyBeijing100029China

The fatigue resistance of casting polyurethane(CPU)is crucial in various sectors,such as construction,healthcare,and the automotive *** its importance,no studies have reported on the fatigue threshold of *** study employed an advanced Intrinsic Strength Analyzer(ISA)to evaluate the fatigue threshold of CPUs,systematically exploring the effects of three types of isocyanates(PPDI,NDI,TDI)that contribute to hard segment structures based on the cutting *** multiple advanced characterization techniques(XRD,TEM,DSC,AFM),the results indicate that PPDI-based polyurethane exhibits the highest fatigue threshold(182.89 J/m^(2))due to a highest phase separation and a densely packed spherulitic structure,although the hydrogen bonding degree is the lowest(48.3%).Conversely,NDI-based polyurethane,despite having the high hydrogen bonding degree(53.6%),exhibits moderate fatigue performance(122.52 J/m^(2)),likely due to a more scattered ***-based polyurethane,with the highest hydrogen bonding degree(59.1%)but absence of spherulitic structure,shows the lowest fatigue threshold(46.43 J/m^(2)).Compared to common rubbers(NR,NBR,EPDM,BR),the superior fatigue performance of CPU is attributed to its well-organized microstructure,polyurethane possesses a higher fatigue threshold due to its high phase separation degree and orderly and dense spherulitic structure which enhances energy dissipation and reduces crack propagation.

关键词： Casting polyurethane Fatigue threshold Cutting method Hard segment structures Materials characterization

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A non-fluorinated liquid-like membrane with excellent anti-scaling performance for membrane distillation

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Chinese Chemical Letters 2025年第1期36卷 521-528页

作者： Jianwen Zhao Shuai Wang Shanshan Zhao Liwei Chen Fangang Meng Xuelin Tian State Key Laboratory of Optoelectronic Materials and Technologies School of Materials Science and EngineeringSun Yat-sen UniversityGuangzhou 510006China Key Laboratory for Polymeric Composite&Functional Materials of Ministry of Education Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable DevicesSun Yat-sen UniversityGuangzhou 510006China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology School of Environmental Science and EngineeringSun Yat-sen UniversityGuangzhou 510006China

Membrane distillation(MD)has gained extensive attention for treating highly saline ***,membrane scaling during the MD process has hindered the rapid development of this *** approaches to mitigate scaling in membrane distillation focus primarily on achieving enhanced hydrophobicity and even superhydrophobicity via utilizing fluorinated fibrous membrane or introducing perfluorosilane *** the environmental hazards posed by fluorinated compounds,it is highly desirable to develop non-fluorinated membranes with enhanced anti-scaling properties for effective membrane *** this study,we present a non-fluorinated liquid-like MD membrane with exceptional anti-scaling *** membrane was facilely fabricated by grafting linear polydimethylsiloxane(LPDMS)onto a hydrophilic polyether sulfone(PES)membrane pre-coated with the intermediate layers of polydopamine and silica(denoted as LPDMS-PES).Remarkably,LPDMS-PES manifested a drastically improved scaling resistance in continuous MD tests than its perfluorinated counterpart,i.e.,1H,1H,2H,2H-perfluorooctyltrichlorosilane-modified PES membrane(PFOS-PES),in both heterogeneous nucleation-dominated and crystal deposition-dominated scaling processes,despite the latter having a smaller surface ***-PES demonstrated a reduction of crystal accumulation of approximately 85%for Na Cl and 73%for Ca SO_(4) in the heterogeneous nucleation-dominated scaling process compared to ***,in the crystal deposition-dominated scaling process LPDMS-PES exhibited a reduction of about 70%in scale *** results explicitly evidenced the great potential of the liquid-like membrane to minimize scaling in membrane distillation by inhibiting both scale nucleation and adhesion onto the *** believe the findings of this study have important implications for the design of high-performance MD membranes,particularly in the quest for environmentally susta

关键词： Surface modification Liquid-like membranes Anti-scaling Non-fluorinated Direct contact membrane distillation

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Structure-phase transformation of bismuth oxide to BiOCl/Bi_(24)O_(31)Cl_(10)shoulder-by-shoulder heterojunctions for efficient photocatalytic removal of antibiotic

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Journal of Environmental sciences 2025年第3期149卷 149-163页

作者： Man Yang Zhenzhen Shi Shaodong Sun Bian Yang Jie Cui Jianing Li Daqin Yun Nian Lei Engineering Research Center of Conducting Materials and Composite Technology Ministry of EducationShaanxi Engineering Research Center of Metal-Based Heterogeneous Materials and Advanced Manufacturing TechnologyShaanxi Province Key Laboratory for Electrical Materials and Infiltration TechnologySchool of Materials Science and EngineeringXi’an University of TechnologyXi’an 710048China College of Energy Xiamen UniversityXiamen 361005China Beijing Key Laboratory of Ionic Liquids Clean Process Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China

Developing heterojunction photocatalyst with well-matched interfaces andmultiple charge transfer paths is vital to boost carrier separation efficiency for photocatalytic antibiotics removal,but still remains a great *** present work,a new strategy of chloride anion intercalation in Bi_(2)O_(3)via one-pot hydrothermal process is *** as-prepared Ta-BiOCl/Bi_(24)O_(31)Cl_(10)(TBB)heterojunctions are featured with Ta-Bi_(24)O_(31)Cl_(10)and Ta-BiOCl lined shoulder-by-shouleder via semi-coherent *** this TBB heterojunctions,the well-matched semi-coherent interfaces and shoulder-by-shoulder structures provide fast electron transfer andmultiple transfer paths,respectively,leading to enhanced visible light response and improved photogenerated charge ***,a type-II heterojunction for photocharge separation has been obtained,in which photogenerated electrons are drove from the CB(conduction band)of Ta-Bi_(24)O_(31)Cl_(10)to the both of bilateral empty CB of Ta-BiOCl and gathered on the CB of Ta-BiOCl,while the photogenerated holes are left on the VB(valence band)of Ta-Bi_(24)O_(31)Cl_(10),effectively hindering the recombination of photogenerated electron-hole ***,the separated electrons can effectively activate dissolved oxygen for the generation of reactive oxygen species(·O_(2)^(−)).Such TBB heterojunctions exhibit remarkably superior photocatalytic degradation activity for tetracycline hydrochloride(TCH)solution to Bi_(2)O_(3),Ta-BiOCl and Ta-Bi_(24)O_(31)Cl_(10).This work not only proposes a Ta-BiOCl/Bi_(24)O_(31)Cl_(10)shoulder-by-shoulder micro-ribbon architectures with semi-coherent interfaces and successive type-Ⅱheterojunction for highly efficient photocatalytic activity,but offers a new insight into the design of highly efficient heterojunction through phasestructure synergistic transformation strategy.

关键词： Heterojunction Bismuth oxide Charge separation/transfer Photocatalytic degradation Catalytic mechanism

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Cocktail Effects in Boosting the Interfacial Ionic Conduction of the Garnet Solid-State Battery

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ACS Applied Materials and Interfaces 2025年第19期17卷 28103-28114页

作者： Wang, Zhipeng Peng, Jiaoli Duan, Renjie Gong, Wei Song, Hongquan Yu, Mingpeng Center for Green Innovation Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science School of Mathematics and Physics University of Science and Technology Beijing Beijing100083 China Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science School of Mathematics and Physics University of Science and Technology Beijing Beijing100083 China Faculty of Engineering Shinshu University 4-17-1 Wakasato Nagano-shi380-8553 Japan College of Physics and Telecommunication Engineering Zhoukou Normal University Zhoukou466001 China

The garnet-type Li7La3Zr2O12 electrolyte has gained a lot of attention due to its nonflammability, high ionic conductivity, and thermodynamic stability against lithium anodes. However, the large-scale application of solid garnet electrolytes is restricted by high interfacial resistance due to the poor wettability of metallic lithium and interfacial voids caused by sluggish lithium-ion transport during plating/stripping. Herein, we propose a three-dimensional (3D) composite lithium anode with high ionic and electronic conductivity by introducing a small amount of carbonized ZIF-8 powder into molten lithium, achieving compact contact with remarkably low interfacial resistance of 15.2 Ω cm2 due to the decreased surface tension of molten lithium. Aided by DFT calculations, we are able to confirm that the reaction products of Li3N, Li2O, Li−Zn alloy, and LiC6 have much lower interfacial formation energies with garnet electrolytes compared to that of the pure lithium anode. The lithiophobic Li3N and Li2O could impede lithium dendrite growth, provide rapid ionic transport, and thus prevent garnet reduction. In addition, the lithiophilic Li−Zn alloy and LiC6 accelerate lithium-ion migration, preventing the formation of voids at the interface. Thus, the so-called cocktail effects would occur to boost the electrochemical performance through synergistic interactions. The symmetric battery enabled with the composite lithium anode achieves an impressive CCD of 2.5 mA cm−2 and stable galvanostatic cycling for 350 h without short-circuiting at 0.5 mA cm−2. Moreover, the full cell paired with the LiFePO4 cathode delivers excellent cycling performance (LiFePO4, 86.2%@160th cycle@0.5 C). This article describes an integrated approach to develop safe and long-lasting solid-state batteries. © 2025 American Chemical Society.

关键词： Lithium-ion batteries

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Understanding the iodine electrochemical behaviors in aqueous zinc batteries

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Journal of Energy Chemistry 2025年第2期101卷 402-415,I0009页

作者： Xuefang Xie Xiaoxin Xu Shuquan Liang Guozhao Fang College of Physical Science and Technology Xinjiang UniversityUrumqi 830017XinjiangChina Xinjiang Key Laboratory of Solid State Physics and Devices Xinjiang UniversityUrumqi 830046XinjiangChina School of Materials Science&Engineering Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan ProvinceCentral South UniversityChangsha 41003 HunanChina National Energy Metal Resources and New Materials Key Laboratory Central South UniversityChangsha 410083HunanChina

Iodine is widely used in aqueous zinc batteries(ZBs)due to its abundant resources,low cost,and active redox *** addition to the active material in zinc-iodine batteries,iodine also plays an important role in other ZBs,such as regulating the electrochemical behavior of zinc ions,promoting the reaction kinetic and reversibility of other redox pairs,catalytic behaviors related to iodine reactions,coupling with other halogen ions,shuttle behaviors of polyiodides,***,there is currently a lack of comprehensive discussion on these ***,this review provides a comprehensive overview of the electrochemical behaviors of iodide in the aqueous *** effect of iodine ions on the Zn^(2+)desolvation behaviors and the interfacial behaviors of Zn anode was *** redox pairs boosting other redox pairs,such as MnO_(2)/Mn^(2+)redox pair and vanadium redox pair to obtain high reversibility and capacity was also ***,the catalytic behaviors related to iodine reactions in aqueous ZBs,synergistic reaction with other halogen ions and suppression of shuttle behaviors for high performance zinc-iodine batteries were systematically ***,future prospects for designing effective iodine electrochemical behaviors with practicability are proposed,which will provide scientific guidance for the practical application of iodine-related aqueous ZBs.

关键词： lodide ion Redox pairs Catalytic behavior Shuttle effect Zinc batteries

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One-step fabrication of ultrathin porous Janus membrane within seconds for waterproof and breathable electronic skin

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science Bulletin 2025年第5期70卷 712-721页

作者： Yufeng Ni Bing Li Chengzhen Chu Shaofan Wang Yujie Jia Shichun Cao Rasoul Esmaeely Neisiany Chuanglong He Shuo Chen Zhengwei You State Key Laboratory of Advanced Fiber Materials Institute of Functional MaterialsCollege of Materials Science and EngineeringResearch Base of Textile Materials for Flexible Electronics and Biomedical Applications(China Textile Engineering Society)Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative MedicineShanghai Key Laboratory of Lightweight CompositeDonghua UniversityShanghai 201620China College of Biological Science and Medical Engineering Donghua UniversityShanghai 201620China Department of Materials and Polymer Engineering Faculty of EngineeringHakim Sabzevari UniversitySabzevar***Iran Biotechnology Centre Silesian University of TechnologyGliwice44-100Poland

It remains a challenge for a simple and scalable method to fabricate ultrathin porous Janus membranes for stretchable on-skin ***,we propose a one-step droplet spreading phase separation strategy to prepare an ultrathin and easily collected Janus thermoplastic polyurethane(TPU)membrane within *** metal-ion solvation structure mitigated migration kinetics to delay TPU solution demixing,promoting the further penetration of the coagulating ***,the developed membranes,with an average preparation rate of 25.2 cm^(2)s^(−1),had a thickness of 5μm,and the water vapor transmission rate was determined to be 663 g m^(−2) d^(−1).The small pore layer having an average pore size of 1.7μm effectively blocked external liquid *** porous Janus TPU membrane coated by liquid metal served as a building block to develop a new generation of monolithic stretchable electronics with simultaneous high permeability and waterproofness.

关键词： porous polyurethane kinetics

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Effect of fiber breakage defect and waviness defect on compressive fatigue behavior and damage evolution of 3D multiaxial braided composites

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Chinese Journal of Aeronautics 2025年第2期38卷 491-504页

作者： Yan SUN Yifan ZHANG Tao LIU Yunjuan JING Jun MA Yao LU Chan WANG Xinhai HE Xiaogang CHEN Wei FAN School of Textile Science and Engineering Xi’an Polytechnic UniversityXi’an 710048China Key Laboratory of Advanced Textile Composite Materials Ministry of EducationTiangong UniversityTianjin 300387China Shaanxi Yuanfeng Textile Technology Research Co.LTD. Xi’an 710038China Longi Green Energy Technology Co.LTD. Xi’an 710068China Department of Textile Engineering and Materials School of MaterialsThe University of ManchesterManchester M139PLUK Key Laboratory of Functional Textile Material and Product of Ministry of Education Xi’an Polytechnic UniversityXi’an 710048China

This paper reports the effects of fiber breakage defects and waviness defects on the compressive fatigue behavior and the progressive damage evolution process of 3D Multiaxial Braided composites (3DMBCs). Combined with finite element compression simulation and ultra-depth microscope, the internal defect content of composites with different braiding angles was determined. The results demonstrate that the weakening effect of waviness and fiber breakage defects is greater than the strengthening effect of the braiding angle. This causes the fatigue resistance of 3DMBCs with the 31° braiding angle being better in both directions of 0° and 90°. The increase of 4° waviness and 10% fiber breakage defect results in the average fatigue life of composites being shortened by 48% and the energy consumption rate increased by 10% at 85% stress level in 90° compression direction. The alteration in loading direction modifies the included angle corresponding to the stress component. The stress component parallel to the fiber direction under compressive fatigue load leads to interfacial debonding in the composites, whereas the stress component perpendicular to the fiber direction results in pronounced shear failure.

关键词： Three-dimensional reinforcement Defects Compression fatigue behavior Mechanical properties Crack propagation Numerical analysis

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Crystal-Collapse-Induced Synthesis of High-Capacitance LaCoO_(x)/Co-Doped Carbon-Based Supercapacitors

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Transactions of Tianjin University 2025年第1期31卷 29-41页

作者： Zhihao Deng Yuanbo Wang Wu Shao Jingwen He Jie Sheng Ronghao Cen Yufei Fu Wenjun Wu Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Shanghai Key Laboratory of Functional Materials ChemistryFeringa Nobel Prize Scientist Joint Research CenterInstitute of Fine ChemicalsFrontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai200237China

The development of high-performance,reproducible carbon(C)-based supercapacitors remains a significant challenge because of limited specific ***,we present a novel strategy for fabricating LaCoO_(x) and cobalt(Co)-doped nanoporous C(LaCoO_(x)/Co@ZNC)through the carbonization of Co/Zn-zeolitic imidazolate framework(ZIF)crystals derived from a PVP-Co/Zn/La *** unique ZIF structure effectively disrupted the graphitic C framework,preserved the Co active sites,and enhanced the electrical *** synergistic interaction between pyridinic nitrogen and Co ions further promoted redox *** addition,the formation of a hierarchical pore structure through zinc sublimation facili-tated electrolyte *** resulting LaCoO_(x)/Co@ZNC exhibited exceptional electrochemical performance,delivering a remarkable specific capacitance of 2,789 F/g at 1 A/g and outstanding cycling stability with 92%capacitance retention after 3,750 *** findings provide the basis for a promising approach to advancing C-based energy storage technologies.

关键词： Supercapacitor High capacitance Carbon electrode Doping Crystal-collapse

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advanced 3D-printed antibacterial nano 58S bioglass/AgNPs/CeO2-based scaffolds for bone tissue engineering

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Ceramics International 2025年第15期51卷 20939-20953页

作者： Singh, Indrajeet Kong, Ing Viswakarma, Ashok Balani, Kantesh Advanced Polymer and Composite Materials Laboratory Department of Engineering School of Computing Engineering and Mathematical Sciences La Trobe University BendigoVIC3550 Australia Department of Materials Science and Engineering Indian Institute of Technology Kanpur208016 India Department of Mechanical Engineering Indian Institute of Technology Kanpur208016 India

58S bioglass (BG) has been considered an effective bioceramic in bone tissue engineering due to its good osteoinductive and osteoconductive properties;however, its poor antibacterial and printing properties remain a challenge in the development of ideal patient-specific, fully interconnected, bone-like scaffolds. To address this issue, this study presents novel 3D-printed BG/AgNPs/CeO2 (BGAC3D) composite scaffolds. These scaffolds exhibit a fully interconnected pore network (≈99 %) with a porosity of ≈64 % and optimally designed pore and strut sizes of 404 ± 15 μm and 394 ± 30 μm, respectively, making them suitable for bone healing applications. Adding AgNPs and ceria nanoparticles significantly increased the shear-thinning properties of Pluronic F-127/BG/AgNPs/CeO2-based ink, as compared to Pluronic F-127/BG-based ink. As a result, BGAC3D scaffold showed improved dimensional accuracy during printing relative to pristine BG. Nanoindentation studies revealed substantial increase in the mechanical properties of BGAC3D scaffolds, with elastic modulus, hardness, and compressive strength showing enhancement of 76 % (57.9 ± 8 GPa), 24 % (3.1 ± 1 GPa), and 275 % (1.5 ± 0.4 MPa), respectively. The antibacterial properties of BGAC3D scaffolds were investigated using disc diffusion and bacterial adhesion assays, which demonstrated an exceptional bactericidal efficacy of 99.3 % against Escherichia coli (E. coli) and 99.4 % against Staphylococcus aureus (S. aureus) compared to pristine BG. The cytocompatibility of the scaffolds was assessed using resazurin assays with mouse BMSCs and MTT assays with mouse fibroblasts, revealing enhanced cell viability for the BGAC3D composition compared to BG. Additionally, both BG and BGAC3D composites showed similar apatite mineralization on their surfaces, as observed under a scanning electron microscope. These findings indicate that BGAC3D scaffolds possess the necessary mechanical, antibacterial, and cytocompatibility properties, making th

关键词： Escherichia coli

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Time-dependent color-tunable room temperature phosphorescence from unusual conformational transitions in phenothiazine polymers under UV irradiation

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science China Chemistry 2025年第3期68卷 1091-1098页

作者： Jiwen Lu Yifan Niu Chanjuan Jin Chengheng Wu Hanyu Wang Yan Guan Ping Wang Xinghe Fan Key Lab of Environment-Friendly Chemistry and Application of Ministry of Education Key Laboratory of Polymeric Materials and Application Technology of Hunan ProvinceKey Laboratory of Advanced Functional Polymer Materials of CollegesUniversities of Hunan ProvinceCollege of ChemistryXiangtan UniversityXiangtan 411105China Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry and Physics of Ministry of EducationCenter for Soft Matter Science and EngineeringCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

Achieving color-tunable room-temperature phosphorescence(RTP),especially including blue RTP from a single-component polymer still faces a formidable ***,we wisely choose conformation-dependent phenothiazine with trifluoromethyl substituent as the side group of the phosphor monomer(Cz PT)and then copolymerize it with N-isopropylacrylamide(NIPAM)through photopolymerization to obtain polymers PPCz ***-dependent color-tunable phosphorescence from unusual quasi-equatorial(eq)to quasi-axial(ax)conformers are obtained,and the RTP color changes from orange(550 nm)to blue(470 nm)with phosphorescence lifetime up to 0.96 *** theoretical calculations confirm that the quasi-axial conformer is the preferred structure that facilitates the formation of intramolecular hydrogen bonds on the trifluoromethyl *** EPR spectra illustrate that the persistent UV irradiation generates radical cations to induce the conformational transitions first,followed by photopolymerization immobilizing the ax conformation in PPCz *** of data encryption and anti-counterfeiting are fabricated to show prompt and delayed multicolor *** work affords a simple and feasible avenue for two-dimensional color tunable room temperature phosphorescence from a single-component polymer.

关键词： polymeric room temperature phosphorescence color-tunable phosphorescence conformation-dependent time-dependent blue phosphorescence

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