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Wireless electrical stimulation at the nanoscale interface induces tumor vascular normalization

bioactive materials 2022年第12期7卷 399-408页

作者： Changhao Li Cairong Xiao Lizhen Zhan Zhekun Zhang Jun Xing Jinxia Zhai Zhengnan Zhou Guoxin Tan Jinhua Piao Yahong Zhou Suijian Qi Zhengao Wang Peng Yu Chengyun Ning School of Material Science and Engineering National Engineering Research Center for Tissue Restoration and ReconstructionMetallic Materials Surface Functionalization Engineering Research Center of Guangdong ProvinceSouth China University of TechnologyGuangzhou510641China School of Food Science and Engineering South China University of TechnologyGuangzhou510641China CAS Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of ScienceBeijing100190China School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou510006China China-Singapore International Joint Research Institute Guangzhou511365China

Pathological angiogenesis frequently occurs in tumor tissue, limiting the efficiency of chemotherapeutic drug delivery and accelerating tumor progression. However, traditional vascular normalization strategies are not fully effective and limited by the development of resistance. Herein, inspired by the intervention of endogenous bioelectricity in vessel formation, we propose a wireless electrical stimulation therapeutic strategy, capable of breaking bioelectric homeostasis within cells, to achieve tumor vascular normalization. Polarized barium titanate nanoparticles with high mechano-electrical conversion performance were developed, which could generate pulsed open-circuit voltage under low-intensity pulsed ultrasound. We demonstrated that wireless electrical stimulation significantly inhibited endothelial cell migration and differentiation in vitro. Interestingly, we found that the angiogenesis-related eNOS/NO pathway was inhibited, which could be attributed to the destruction of the intracellular calcium ion gradient by wireless electrical stimulation. In vivo tumor-bearing mouse model indicated that wireless electrical stimulation normalized tumor vasculature by optimizing vascular structure, enhancing blood perfusion, reducing vascular leakage, and restoring local oxygenation. Ultimately, the anti-tumor efficacy of combination treatment was 1.8 times that of the single chemotherapeutic drug doxorubicin group. This work provides a wireless electrical stimulation strategy based on the mechano-electrical conversion performance of piezoelectric nanoparticles, which is expected to achieve safe and effective clinical adjuvant treatment of malignant tumors.

关键词： Calcium distribution Mechano-electrical conversion Piezoelectric barium titanate Tumor vascular normalization Wireless electrical stimulation

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Safe and economical preparation of amino acid-derived bio-based triazine char-forming agent for efficient intumescent flame retardant polypropylene

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Construction and Building materials 2025年 484卷

作者： Xu, Yue Hu, Haojie Tao, Bin Yin, Ru Liu, Lubin Li, Bin Heilongjiang Key Laboratory of Molecular Design and Preparation of Flame Retarded Materials College of Chemistry Chemical Engineering and Resource Utilization Northeast Forestry University Harbin150040 China Key Laboratory of Bio-based Material Science and Technology Ministry of Education Northeast Forestry University Harbin150040 China National and Local Joint Engineering Laboratory for Ecological Utilization of Biological Resources Northeast Forestry University Harbin150040 China

Triazine intumescent flame retardant (IFR) PP composites have been widely used in electronic appliances, rail transit, and aerospace fields due to their low smoke, high efficiency and environmental friendliness. However, with the increasing attention to safe production and sustainable development, the green and safe synthesis and biomaterialization of traditional triazine char-forming agents have received extensive attention. Herein, a bio-based triazine char-forming agent N-propionyltriazine-ethylenediamine copolymer (PTEC) was successfully prepared by bio-based β-alanine and cyanuric chloride as raw materials under a pure water system for the first time. A novel bio-based IFR (BIFR) system was constructed with ammonium polyphosphate. Only 24 wt% BIFR make PP pass the UL-94 V-0 rating, and the LOI of PP/BIFR was improved to 29.7 %. Compared to pure PP, the smoke and heat release rate of PP/BIFR composites were decreased by 54.5 % and 76.2 %, respectively. The introduction of BIFR promoted the dehydration and charring of PP composites, and released many inert gases during pyrolysis, which led to the rapid expansion of composites. The formed dense and high-strength char layer exerted excellent shielding effect in the condensed phase. In addition, the PP/BIFR composites retained excellent mechanical properties, and the flexural strength and ductility were significantly improved with the addition of BIFR. This study provided a new way for the safe production and biomaterialization of triazine char-forming agents, and the prepared bio-based PP composites with excellent flame retardancy and mechanical properties showed a great application prospect in construction, building materials and other emerging fields. © 2025 Elsevier Ltd

关键词： Bending strength

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Preparation of Situ Microfiber-Reinforced Co-Extruded High-Filled Wood-Plastic Composite with Excellent Mechanical, Creep Resistance, and Water Resistance Properties

SSRN

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SSRN 2023年

作者： Yang, An Zhang, Rui Xu, Zesheng Liu, Tian Fang, Yiqun Wang, Weihong Xu, Min Song, Yongming Wang, Qingwen Key Laboratory of Bio-based Material Science and Technology Ministry of Education Northeast Forestry University Heilongjiang Harbin150040 China College of Home and Art Design Northeast Forestry University Harbin150040 China College of Materials and Energy South China Agricultural University Guangzhou510642 China

High-filled wood-plastic composite (HFWPC) is a new type of composite with great environmental and economic benefits because it contains significant biomass contents and minimizes the use of plastics. However, the defects of poor mechanical properties, high water absorption, poor drying-wetting cycle resistance, which greatly limits its long-term use in a high-humidity environment. In this study, an in-situ microfibrillated polyethylene terephthalate (PET)/high-density polyethylene (HDPE) polyblend was prepared using an extrusion hot stretching process, and was used as the shell of the co-extruded high-filled wood-plastic composite (Co-HFWPC). Co-HFWPC exhibited excellent mechanical properties and water stability. The flexural strength and tensile strength increase by 114% and 97%, The Co-HFWPC has an extremely low water absorption (less than 0.6%) and its mechanical property retention rate was more than 90% after 20 drying-wetting cycles, and the creep strain of the Co-HFWPC decreased with increasing PET content in the shell layers. This study provides insight into an efficient and low-cost method for large-scale preparation of high-strength, water-resistance and creep-resistance Co-HFWPC and extended their application areas like constructing materials and some extreme circumstances. © 2023, The Authors. All rights reserved.

关键词： Creep

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Boosting electrocatalytic hydrogen generation by a renewable porous wood membrane decorated with Fe-doped NiP alloys

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Journal of Energy Chemistry 2021年第5期30卷 23-33页

作者： Bin Hui Jian Li Yun Lu Kewei Zhang Hongjiao Chen Dongjiang Yang Liping Cai Zhenhua Huang State Key Laboratory of Bio-Fibers and Eco-Textiles Shandong Collaborative Innovation Center of Marine Biobased Fiber and Ecological TextileInstitute of Marine Biobased MaterialsSchool of Environmental Science and EngineeringQingdao UniversityQingdao 266071ShandongChina Key Laboratory of Bio-based Materials Science and Technology of Ministry of Education Research Center of Wood Bionic Intelligent ScienceNortheast Forestry UniversityHarbin 150040HeilongjiangChina Research Institute of Wood Industry Chinese Academy of ForestryBeijing 100091China College of Engineering University of North Texas3940 NElm St.DentonTX 76207USA

Porous biomass electrodes have emerged as a critical material for electrocatalytic hydrogen evolution reaction(HER).However,most approaches for synthesizing porous electrodes from biomass require high energy consumption,which is resulted from the smash of biomass and the undergoing of serial ***,a self-supported wood-derived"breathable"membrane is utilized directly as electrodes for highefficient HER via an assembly of Fe-doped NiP *** well-designed hierarchical porous structures in natural wood membrane(NWM)are unusually beneficial for electrolytes accessibility and hydrogen gas *** obtained wood-derived membrane exhibits a high electrocatalytic activity and good cycling durability in acidic and alkaline ***,the Fe_(0.074) NiP alloys/NWM electrode affords a large current density of 100 m A cm^(-2) at extremely low overpotentials of 168 mV in acidic electrolyte and174 m V in alkaline *** functional theory calculations unveil that the Fe atom doped in NiP alloys can create much more charge accumulation around Fe and Ni active sites,which helps decrease the △GH_(*)and △G_(H2O)and significantly promote the HER *** new insight will promote further explorations of economic,high-efficient,and biodegradable wood-derived electrocatalysts for HER.

关键词： Wood membrane Hierarchical structures Electrocatalysis:Hydrogen generation

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Metal-organic frameworks and their derivatives for sustainable flame-retardant polymeric materials

Advanced Nanocomposites

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Advanced Nanocomposites 2025年 2卷 1-14页

作者： Geng Huang Ye-Tang Pan Lubin Liu Pingan Song Rongjie Yang College of Chemistry and Materials Science Hengyang Normal University Hunan 421008 PR China National Engineering Research Center of Flame Retardant Materials School of Materials Science & Engineering Beijing Institute of Technology Beijing 100081 PR China Key Lab of Bio-based Material Science and Technology Ministry of Education Northeast Forestry University Harbin 150040 People’s Republic of China Centre for Future Materials University of Southern Queensland Springfield 4300 Australia School of Agriculture and Environmental Science University of Southern Queensland Springfield 4300 Australia

biomass resources are natural polymeric materials that are abundant, affordable, non-toxic and renewable. Although they find diverse applications in both everyday life and high-tech materials, their use is often constrained by the associated fire hazards. To address this issue, there is a growing interest in the development of flame-retardant biomass polymeric materials. Metal-organic frameworks (MOFs) consist of transition metal species, flame-retardant elements and potential carbon sources, allowing for easy adjustment of their structure and properties. This versatility makes MOFs and their derivatives and hybrids highly attractive for flame retardancy studies. Despite their distinctive properties, MOFs alone may not fully satisfy the demands of commercial flame-retardant applications. The combination of MOFs with biomass materials has been identified as a promising strategy for developing efficient flame-retardant biomass nanocomposites. This innovative approach aims to address the limitations of MOFs by capitalizing on synergistic effects. This review highlights recent advancements and strategies in MOF-based flame retardants incorporating biomass materials, and it elucidates the flame-retardant mechanisms of MOF/biomass nanocomposites to inform future design efforts in the field. Furthermore, the review discusses the current challenges and prospects in this field, aiming to provide a succinct yet comprehensive overview for researchers to quickly grasp the latest developments.

关键词： Sustainable Polymer nanocomposites MOFs Nanomaterials Flame-retarding mechanism

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Rupture stress of liquid metal nanoparticles and their applications in stretchable conductors and dielectrics

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npj Flexible Electronics 2021年第1期5卷 87-93页

作者： Yang Liu Xinyi Ji Jiajie Liang School of Materials Science and Engineering National Institute for Advanced MaterialsNankai UniversityTianjinPR China College of Light Industry Science and Engineering Tianjin University of Science and TechnologyTianjinPR China Key Laboratory of Functional Polymer Materials of Ministry of Education College of ChemistryNankai UniversityTianjinPR China Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry and Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Nankai UniversityTianjinPR China

Few works had systematically investigated the relationship between the rupture stress of the oxide shell and the diameter of liquid metal nanoparticles(LMNPs).Here,we fabricated a series of elastomer/LMNPs composites,which were based on various polyurethanes with different shore hardness and LMNPs with different diameters,to systematically study the rupture stress of *** established a reliable and guidable relationship between the stress–strain curves of elastomers with different shore hardness and rupture stress of LMNPs with various diameters by both experiments and numerical *** on this guidance,we can facilely prepare stretchable conductors with remarkable stretchability and conductivity(i.e.,24,130 S·cm^(−1)at 500%strain)and stretchable dielectrics with excellent stretchability and permittivity(i.e.,dielectric constant of 76.8 with 580%strain)through controlling the shore hardness of elastomers and diameter of *** work will facilitate the systematic study of LMNPs and expand their use in stretchable electronics.

关键词： stress diameters rupture

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Electronic Metal-Support Interaction Constructed on Platinum Sites for Enhanced Selective Hydrogenation of biomass-Derived Furfural

SSRN

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SSRN 2024年

作者： Fu, Min Shan, Ziyang Zhang, Mingtao Guan, Meili Wang, Kunhua Chen, Wei Yang, Yanru Li, Hui Ning, Liangmin Yu, Hao Liu, Xin College of Energy Storage Technology Shandong University of Science and Technology Qingdao266590 China Tianjin Key Laboratory of Metal and Molecule Based Material Chemistry Collaborative Innovation Centre of Chemical Science and Engineering Nankai University Tianjin300071 China School of Thermal Engineering Shandong Jianzhu University Jinan250101 China

Manipulating the Electronic Metal-Support Interaction (EMSI) in metal catalysts supported on various substrates has proven to be the most efficient strategy for adjusting electronic structure and enhancing catalytic efficiency. However, a comprehensive understanding of the electronic charge transfer mechanism during the catalytic process has been challenging to grasp. Herein, a novel flower-like spherical catalyst, Pt-PtOx@Mg(OH)2-F, was synthesized using the gas-liquid interface method and the sol-gel method, achieving efficient conversion of biomass platform compound furfural to furfuryl alcohol with a TOF value of 333.96 h-1, which is higher than the performance of most catalysts. Evidence from EXAFS, XPS, CO-DRIFTS spectroscopy, and theoretical calculations indicated that electronic disruptions between Pt species and the Mg(OH)2 support, wherein charge redistribution has a direct impact on adsorption behavior during the catalytic procedure. The Pt-O bonds formed through orbital hybridization altered the charge state of surface Pt sites, directing more electrons towards the furfural intermediate (C4H3O-CHO*), thereby facilitating adsorption. Ultimately, the active sites of the Pt-PtOx@Mg(OH)2-F catalyst were composed of Ptδ+ Lewis acid sites and OHδ- Lewis base sites, with the furfural carbonyl coordinating with the oxygen atoms of ethanol and Ptδ+ sites, forming a six-membered ring transition state that eventually achieved the reduction of the furfural carbonyl. © 2024, The Authors. All rights reserved.

关键词： Furfural

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The Arrangement and Size of Cellulose Microfibril Aggregates in the Cell Walls of Sclerenchyma Fibers and Parenchyma Tissue in Bamboo

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Journal of Renewable materials 2021年第12期9卷 2291-2301页

作者： Wenting Ren Fei Guo Minghui Liu Haocheng Xu Hankun Wang Yan Yu Institute of New Bamboo and Rattan Based Biomaterials International Center for Bamboo and RattanBeijing100102China College of Material Engineering Fujian Agriculture and Forestry UniversityFuzhou350108China NFGA and Beijing Co-Built Key Laboratory of Bamboo and Rattan Science&Technology National Forestry and Grassland AdministrationBeijing100102China

Understanding the assembly and spatial arrangement of bamboo cell wall components is crucial for its optimal *** cell walls consist of aggregates of cellulose microfibrils and *** the present study,the size and arrangement of cellulose microfibril aggregates in the cell walls of sclerenchyma fibers and parenchyma cells in moso bamboo were investigated with NMR and *** NMR measurement showed that the characteristic sizes of the microfibril aggregates of fibers and parenchyma cells were approximately 25.8 nm and 18.8 nm,***,high-resolution SEM showed the size of microfibril aggregates varied little across the cell wall of sclerenchyma ***,there were significant size differences between the broad and narrow lamellae both in fiber and parenchyma cells,which is thought to be closely related to the orientation of microfibrils in these *** microfibril aggregates in the fibers mainly appear in a random arrangement,although occasionally in a radial or tangential arrangement in individual *** cells have a relatively thinner cell wall layers,in which microfibril aggregates appear in a concentric lamellar arrangement.

关键词： Bamboo fiber parenchyma cell microfibril aggregate size arrangement

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Pore Space Optimization of Hybrid Ultramicroporous material for Exceptional One-Step C2H4 Purification from C2H2/CO2/C2H4 Mixture

SSRN

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SSRN 2025年

作者： Nie, Hong-Xiang Chen, Hong-Wei Wang, Ting Huang, Hongliang Gao, Qiang Yu, Mei-Hui Zhu, Jian Li, Li-Bo Zhang, Zhenjie Chang, Ze Bu, Xian-He School of Materials Science and Engineering Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry Nankai University Tianjin300350 China Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization College of Chemical Engineering and Technology Taiyuan University of Technology Taiyuan030024 China College of Chemistry Nankai University Tianjin300071 China State Key Laboratory of Separation Membranes and Membrane Processes Tiangong University Tianjin300387 China College of Environmental and Chemical Engineering Jiangsu University of Science and Technology Zhenjiang212100 China

Ethylene (C2H4) is one of the largest volume products of the chemical industry. Whereas a one-step C2H4 purification process using a physisorbent is desirable and much progress has been made in terms of C2H2 and CO2 selective sorbents, very few sorbents offer both high uptake and selective adsorption for both CO2 and C2H2 over C2H4. Here, pore engineering of hybrid ultramicroporous materials (HUMs) was performed through tuning of the organic linkers to enable one-step production of high-purity (>99.95 %) C2H4. Specifically, [Ni(TPE)SiF6]n (SIFSIX-TPE-Ni, TPE = 1,1,2,2-tera(pyridin-4-yl)ethene) was found to exhibit high C2H2 (5.12 mmol/g) and CO2 (2.84 mmol/g) uptake compared to C2H4 (1.46 mmol/g) at 100 kPa and 298 K. Accordingly, the separation selectivity of SIFSIX-TPE-Ni for C2H2/C2H4 (556 for 1/99 mixture) and CO2/C2H4 (7.3 for 50/50 mixture) was enhanced by 66 and 3 times, respectively, compared to its isostructural parent [Zn(TPB)(SiF6)]n (SIFSIX-22-Zn, TPB = 1,2,4,5-tetra(pyridin-4-yl)benzene) at 100 kPa and 298 K. We attribute this performance to the confined pore environment with strong electrostatics from -F moieties that serve as nanotraps for both C2H2 and CO2 binding. SIFSIX-TPE-Ni efficiently produces polymer-grade C2H4 from a ternary mixture of C2H2/CO2/C2H4 (1/9/90, v/v/v) in a one-step, and its separation performance is far superior to that of the currently reported materials. This work further supports the pore engineering approach to systematic optimization of ultramicroporous adsorbents for challenging multi-component gas separation. © 2025, The Authors. All rights reserved.

关键词： Chemical industry

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Novel Strategy for in Situ Construction of Cercis Chinensis Cluster-Like Photocatalytic Heterojunctions

SSRN

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SSRN 2023年

作者： Yang, Bin Li, Yudong Yang, Xiaohui Wang, Dakang Wang, Zhe Han, Enshan He, Yanzhen School of Chemical Engineering and Technology Hebei University of Technology Tianjin300401 China Key Laboratory of Bio-based Material Science & Technology Northeast Forestry University Ministry of Education Heilongjiang Harbin150040 China Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing400715 China Shanghai Space Propulsion Technology Research Institute Shanghai201108 China

Developing high-performance catalysts is a crucial area of research for efficiently utilizing light energy. In this study, a lamellar spherical structure of Cu2(OH)2CO3 was utilized to synthesize Cercis chinensis clustered CuO/g-C3N4 heterojunctions. These heterojunctions were then further improved through in situ orogenesis initiated by the steam and CO2 produced during the decomposition of Cu2(OH)2CO3. This strategy avoided the dilemma of multi-step synthesis of traditional heterojunctions, and further overcome the trouble of removing templates. The heterojunction results in a significant increase in CH4 production in the photocatalytic CO2 reduction reaction. The rate increases to 18.61 μmol·g-1·h-1, which is 4.68 times higher than that of pure g-C3N4 and 16.32 times higher than that of CuO. Moreover, the heterojunction effective exciton separation, mass transfer, and distinct morphology result in a CH4 selectivity of over 75%. In comparison, pure g-C3N4 exhibits a CH4 selectivity of 52%, while CuO demonstrates a selectivity of 36.3%. This work provides a potential and simple strategy for the in situ construction of novel photocatalysts with heterojunctions and special morphologies. © 2023, The Authors. All rights reserved.

关键词： Heterojunctions

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