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Thermodynamics of Aromatic Cyclic Ester Polymerization in Bulk

Chinese Journal of Polymer Science 2019年第1期37卷 89-93页

作者： Chong He Xiang Zhu Xiao-Hong Li Xiao-Ming Yang Ying-Feng Tu Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application College of Chemistry Chemical Engineering and Materials ScienceSoochow University

We present here the thermodynamic investigation of in situ cascade polycondensation-coupling ring-opening polymerization(PROP)for three cyclic aromatic ester monomers,i.e.,cyclic oligo(2-methyl-1,3-propylene terephthalate)s(COMPTs),cyclic oligo(neopentylene terephthalate)s(CONTs)and cyclic oligo(2-methyl-2-propyl-1,3-propylene terephthalate)s(COMPPTs).The equibrium monomer to polymer weight ratio in bulk at different polymerization temperatures for each monomer was estimated by the size exclusion chromatography(SEC),and the thermodynamic parameters were estimated by Dainton *** different from the thermodynamics of aliphatic lactones polymerization,which is an exothermic process with entropy reduction,our results showed the polymerization thermodynamics for three cyclic aromatic ester monomers was a weak exothermic process with slight entropy increment,i.e.,a both enthalpy and entropy driving *** them,CONTs showed the largest value of enthalpy change,due to its symmetric dimethyl substitution onβ-position of propandiol segments.

关键词： Lactone Polyester Polycondensation-coupling ring-opening polymerization Thermodynamic parameters

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Catalytic Hairpin Assembly-Based Self-Ratiometric Gel Electrophoresis Detection Platform For Reliable Nucleic Acid Analysis

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SSRN 2023年

作者： Zhang, Chong-Hua Qi, Fang-Yuan Qiao, Lei Zhang, Ding Liu, Xianjun Peng, Lan Yang, Yu Key Laboratory of Theoretical Organic Chemistry and Functional Molecule of Ministry of Education Hunan Province College Key Laboratory of QSAR/QSPR Hunan Provincial Key Lab of Advanced Materials for New Energy Storage and Conversion Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers School of Chemistry and Chemical Engineering Hunan University of Science and Technology Hunan Xiangtan411201 China Central Laboratory of the Affiliated Xuzhou Municipal Hospital of Xuzhou Medical University Xuzhou first People’s Hospital Jiangsu Xuzhou221116 China

The development of gel electrophoresis-based biodetection assays for accurate analysis has been limited by their reliability and reproducibility due to many interfering factors. In this work, we proposed a ratiometric gel electrophoresis-based biosensing platform by employing catalytic hairpin assembly (CHA) process function as both signal output and signal amplification module. The self-ratiometric biosensor had the advantages in miniaturized instruments, lower cost and satisfying reproducibility. Moreover, dual isothermal amplifications for nucleic acid enable improved sensitivity. Two types of nucleic acids DNA and miRNA are chosen for demonstration. The developed strategy reaches a detection limit of 230 fM for HBV and 130 fM for miRNA, respectively. More interestingly, this developed assay also has the potential to enable portable detection by introducing smartphone camera for imaging. In virtue of these advantages, the proposed ratiometric gel electrophoresis strategy indeed provides a new paradigm for the design of accurate detection platform and might hold great potential for sensitive diagnosis. © 2023, The Authors. All rights reserved.

关键词： Reliability analysis

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A Novel design of Inorganic-Polymer Gel Electrolyte/Anode Interphase in Quasi-Solid-State Lithium-Ion Batteries

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SSRN 2023年

作者： Zhu, Yanan Liu, Caiyuan Yang, Yonggang Li, Yi Wu, Qi-Hui Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application Department of Polymer Science and Engineering College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou215123 China College of Marine Equipment and Mechanical Engineering Xiamen Key Lab of Marine Corrosion and Smart Protective Materials Jimei University Xiamen361021 China

The aim of this work is to improve the electrochemical performance of lithium-ion batteries by developing an inorganic-polymer gel electrolyte and anode electrode, which both use helical mesoporous silica nanofibers (HMSFs) as the skeletons. Based on this design, the electrolyte/anode interphase is naturally integrated, which consequently show excellent properties in electrochemical measurements. The HMSFs were synthesized by calcinating a resin/silica/gel composite using a supramolecular templating method, and then incorporated into P(VDF-HFP) matrix to form the electrolyte membranes (named as NPCGE), which exhibited high thermal stability (up to 372 °C), wide electrochemical window (5.30 V), and high room temperature ionic conductivity (1.2×10-3 S cm-1). Meanwhile, helical mesoporous silica/Fe-N-doped carbon composite nanofibers (HMSFs@Fe-N-C) was fabricated by carbonizing Fe3+-adsorbed resin/silica/gel composites and then acted as the anode material in lithium-ion batteries (LIBs). The assembled HMSFs@Fe-N-C|NPCGE|Li cell showed a high specific capacity around 1290 mAh g-1 over 500 cycles at a current density of 0.3 A g-1 and excellent rate performance, which was not only ascribed to the special composition and nanostructure of the electrolyte and electrode materials, but also to the benign interfacial contacts. © 2023, The Authors. All rights reserved.

关键词： Anodes

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Effective and biocompatible antibacterial surfaces via facile synthesis and surface modification of peptide polymers

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Bioactive Materials 2021年第12期6卷 4531-4541页

作者： Ziyi Lu Yueming Wu Zihao Cong Yuxin Qian Xue Wu Ning Shao Zhongqian Qiao Haodong Zhang Yunrui She Kang Chen Hengxue Xiang Bin Sun Qian Yu Yuan Yuan Haodong Lin Meifang Zhu Runhui Liu State Key Laboratory of Bioreactor Engineering College of ChemistryChemical Engineering and Materials ScienceEast China University of Science and TechnologyShanghai200237China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai201620China Jiangsu Key Laboratory of Advanced Functional Polymers Design and Application Soochow UniversitySuzhou215123China Department of Orthopedic Surgery Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai200080China Key Laboratory for Ultrafine Materials of Ministry of Education Frontiers Science Center for Materiobiology and Dynamic ChemistryResearch Center for Biomedical Materials of Ministry of EducationSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237China

It is an urgent need to tackle drug-resistance microbial infections that are associated with implantable biomedical *** defense peptide-mimicking polymers have been actively explored in recent years to fight against drug-resistant *** recent report on lithium hexamethyldisilazide-initiated superfast polymerization on amino acid N-carboxyanhydrides enables the quick synthesis of host defense peptide-mimicking peptide *** we reported a facile and cost-effective thermoplastic polyurethane(TPU)surface modification of peptide polymer(DLL:BLG=90:10)using plasma surface activation and substitution reaction between thiol and bromide *** peptide polymer-modified TPU surfaces exhibited board-spectrum antibacterial property as well as effective contact-killing ability in ***,the peptide polymer-modified TPU surfaces showed excellent biocompatibility,displaying no hemolysis and *** vivo study using methicillin-resistant Staphylococcus aureus(MRSA)for subcutaneous implantation infectious model showed that peptide polymer-modified TPU surfaces revealed obvious suppression of infection and great histocompatibility,compared to bare TPU *** further explored the antimicrobial mechanism of the peptide polymer-modified TPU surfaces,which revealed a surface contact-killing mechanism by disrupting the bacterial *** results demonstrated great potential of the peptide-modified TPU surfaces for practical application to combat bacterial infections that are associated with implantable materials and devices.

关键词： Peptide polymer Host defense peptide Antimicrobial surface MRSA Subcutaneous infection

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Ion replacement to construct coral-like montmorillonite/manganese-cobalt bimetallic oxide for high-performance supercapacitors with aqueous electrolyte

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Electrochimica Acta 2025年 533卷

作者： Yuan, Yu-Han Li, Gui-Fang Cai, Shuang-Lin Yan, Jin-Wei Liang, Jia Huang, Hai Jin, Long-Long Zeng, Ye Weng, Jian-Chun Fan, Xiao-Hong Li, Yi Deng, Ding-Rong Wu, Qi-Hui Jimei University College of Marine Equipment and Mechanical Engineering Key Laboratory of Energy Cleaning Utilization Development Cleaning Combustion and Energy Utilization Research Center of Fujian Province Xiamen Key Laboratory of Marine Corrosion and Smart Protective Materials Fujian Xiamen361021 China Jiangsu Key Lab of Advanced Functional Polymer Design and Application Department of Polymer Science and Engineering College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou215123 China

With the growth demand of new energies and the limitations of traditional fossil fuels, the development of efficient and environmentally friendly energy storage technologies for the new energies have become crucial. In this study, montmorillonite (MON) was used as the substrate to prepare a novel composite electrode material with manganese-cobalt oxide (HSMnCo), which is in-situ grown on the surface of MON. The manganese-cobalt oxide grown on the surface of MON fills the voids between the MON lamellae, preventing the agglomeration of MON lamellae and keeping it in a relatively loose structure. Meanwhile, MON has a high ion exchange capacity, and the Si4+ between its layers can undergo exchange reactions with Mn2+ and Co2+. Moreover, there is a synergistic and competitive effect between Mn2+ and Co2+, which changes the nucleation sites, nucleation number and growth process of manganese-cobalt oxide on the surface of MON. As a result, HSMnCo with a unique coral-like structure with multiple wrinkles and layers is obtained, significantly increasing the specific surface area (212 m2∙g-1) and porosity of the composite electrode material. Electrochemical tests showed that HSMnCo has a specific capacitance as high as 1235 F∙g-1 at a current density of 0.5 A∙g-1 and still retains 91.6 % of its initial capacity after 5000 cycles, demonstrating excellent cycling stability. The synergistic effect of manganese-cobalt bimetals optimizes the electron transport path, reduces the charge transfer resistance (Rct = 3.58Ω), and improves the power density (279.83 W∙kg⁻¹) and energy density (43.53 Wh∙kg-1). In addition, when it was applied to zinc-ion supercapacitors, the long cycle capacity retention rate is further increased to 94.7 %, and when the power density is 374.78 W∙kg-1, the energy density reaches 177.50 Wh∙kg-1. This study not only provides new ideas for the high value utilization of waste resources such as silicate minerals but also promotes the development of green and low

关键词： Coal storage

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Efficient and targeted drug/siRNA co-delivery mediated by reversibly crosslinked polymersomes toward anti-inflammatory treatment of ulcerative colitis (UC)

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Nano Research 2019年第3期12卷 659-667页

作者： Xin Xu Weijing Yang Qiujun Liang Yanan Shi Wenxin Zhang Xiao Wang Fenghua Meng Zhiyuan Zhong Lichen Yin Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Institute of Functional Nano and Soft Materials (FUNSOM) the Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University Suzhou 215123 China Biomedical Polymers Laboratory and Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 China

Co-delivery of anti-inflammatory siRNA and hydrophilic drug provides a promising approach for the treatment of ulcerative colitis (UC). However, lack of a suitable and efficient co-delivery carrier poses critical challenge against their utilization. We herein developed macrophage-targeting, reversibly crossli nked polymersomes (TKPR-RCP) based on the TKPR-modified, poly(ethyle ne glycol)-b-poly(trimethylene carbonate-codithiolane trimethylene carbonate)-b-polyethylenimine (PEG-P(TMC-DTC)-PEI) triblock copolymer, which could efficiently encapsulate TNF-α siRNA and dexamethasone sodium phosphate (DSP) in their hydrophilic core. The cationic PEI segments provided additional electrostatic interactions with cargo molecules to promote the encapsulatiion, and disulfide crosslinking of the polymersome membrane endowed the TKPR-RCP with high colloidal stability. Because the cationic PEI was embedded in the hydrophilic core, the polymersomes displayed neutral surface charge and thus possessed high serum stability. The TKPR-RCP co-encapsulating TNF-α siRNA and DSP could be efficiently internalized by macrophages (~98%) and undergo redox-responsive membrane de-crosslinking to accelerate cargo release in the cytoplasm, thus inducing efficient gene silencing and anti-inflammatory effect .Intravenous injectio n of the co-delivery TKPR-RCP mediated pote nt and cooperative anti-inflammatory effect in inflamed colons of UC mice, and significantly prevented animals from colonic injury. This study therefore provides a promising approach for the co-delivery of hydrophilic drug/siRNA toward the treatment of inflammatory bowel diseases.

关键词： ulcerative colitis (UC) anti-inflammatory therapy polymersomes reversible crosslinking siRNA/drug co-delivery macrophage targeting

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Second-order topological magneto-optical effects in noncoplanar antiferromagnets

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Physical Review B 2022年第17期106卷 174427-174427页

作者： Ping Yang Wanxiang Feng Xiaodong Zhou Xiuxian Yang Yugui Yao Centre for Quantum Physics Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE) School of Physics Beijing Institute of Technology Beijing 100081 China Beijing Key Lab of Nanophotonics & Ultrafine Optoelectronic Systems School of Physics Beijing Institute of Technology Beijing 100081 China Laboratory of Quantum Functional Materials Design and Application School of Physics and Electronic Engineering Jiangsu Normal University Xuzhou 221116 China

The second-order magneto-optical effects, represented by Voigt and Schäfer-Hubert effects, are effective methods to detect the spin textures in antiferromagnets, whereas the previous studies are usually limited to collinear antiferromagnets. In noncollinear antiferromagnets, the spin textures characterized by spin chirality have been revealed to play a critical role in many exciting physics. In particular, the first-order topological magneto-optical effects originated from scalar spin chirality have been discovered recently. In this work, using the first-principles calculations and group-theory analysis, we generalize the first-order topological magneto-optical effects to the second-order cases, that is, topological Voigt and Schäfer-Hubert effects, by taking the noncoplanar 3Q spin state of γ−FexMn1−x alloy as an example. The conventional Voigt and Schäfer-Hubert effects are comparatively studied in the collinear 1Q and 2Q spin states of γ−FexMn1−x alloy. In addition, the natural linear birefringence due to crystal anisotropy is discussed in the strained 1Q, 2Q, and 3Q states, and a unique fingerprint for experimentally distinguishing the second-order topological magneto-optical effects and natural linear birefringence is identified. Our work brings a topological insight into the second-order magneto-optical effects in noncoplanar antiferromagnets and also provides γ−FexMn1−x as an attractive material platform for future experimental exploration.

关键词： Magneto-optical effect Antiferromagnets Chiral magnets First-principles calculations

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Crystal Thermal Transport in Altermagnetic RuO2

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Physical Review Letters 2024年第5期132卷 056701-056701页

作者： Xiaodong Zhou Wanxiang Feng Run-Wu Zhang Libor Šmejkal Jairo Sinova Yuriy Mokrousov Yugui Yao Centre for Quantum Physics Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE) School of Physics Beijing Institute of Technology Beijing 100081 China Beijing Key Lab of Nanophotonics and Ultrafine Optoelectronic Systems School of Physics Beijing Institute of Technology Beijing 100081 China Laboratory of Quantum Functional Materials Design and Application School of Physics and Electronic Engineering Jiangsu Normal University Xuzhou 221116 China Institute of Physics Johannes Gutenberg University Mainz 55099 Mainz Germany Institute of Physics Czech Academy of Sciences Cukrovarnická 10 162 00 Praha 6 Czech Republic Peter Grünberg Institut and Institute for Advanced Simulation Forschungszentrum Jülich and JARA 52425 Jülich Germany

We demonstrate the emergence of a pronounced thermal transport in the recently discovered class of magnetic materials—altermagnets. From symmetry arguments and first-principles calculations performed for the showcase altermagnet, RuO2, we uncover that crystal Nernst and crystal thermal Hall effects in this material are very large and strongly anisotropic with respect to the Néel vector. We find the large crystal thermal transport to originate from three sources of Berry’s curvature in momentum space: the Weyl fermions due to crossings between well-separated bands, the strong spin-flip pseudonodal surfaces, and the weak spin-flip ladder transitions, defined by transitions among very weakly spin-split states of similar dispersion crossing the Fermi surface. Moreover, we reveal that the anomalous thermal and electrical transport coefficients in RuO2 are linked by an extended Wiedemann-Franz law in a temperature range much wider than expected for conventional magnets. Our results suggest that altermagnets may assume a leading role in realizing concepts in spin caloritronics not achievable with ferromagnets or antiferromagnets.

关键词： Magnetism Nernst effect Thermal Hall effect Topological materials First-principles calculations

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Facile preparation of pH-responsive PEGylated prodrugs for activated intracellular drug delivery

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Chinese Chemical Letters 2019年第12期30卷 2027-2031页

作者： Yue Song Dian Li Jinlin He Mingzu Zhang Peihong Ni College of Chemistry Chemical Engineering and Materials Science State and Local Joint Engineering Laboratory for Novel Functional Polymeric MaterialsJiangsu Key Laboratory of Advanced Functional Polymer Design and Application Suzhou Key Laboratory of Macromolecular Design and Precision SynthesisSoochow University

PEGylated prodrug,covalent attaching polyethylene glycol(PEG) polymer chains to therapeutic drugs,is one of the most promising techniques to improve the water-solubility,stability,and therapeutic effect of *** this study,three PEGylated acid-sensitive prodrugs DOX-PEG-DOX with different molecular weights,were prepared via Schiff-base reaction between aldehyde-modified PEG and the amino groups of doxorubicin(DOX).This kind of amphiphilic polymeric prodrug could be self-assemble into nanoparticles in aqueous *** average particle size and morphologies of the prodrug nanoparticles under different pH conditions were observed by dynamic light scattering(DLS) and transmission electron microscopy(TEM),re s *** turned out that the nanoparticles could be kept stable in the physiological environment,but degraded in acidic ***,we also investigated in vitro drug release behavior and found that the prodrug had acid-sensitive *** cytotoxicity and intracellular uptake assays revealed that the prodrugs could rapidly internalized by HeLa or HepG2 cells to release DOX and effectively inhibited the proliferation of the tumor cells,which have the potential for use in cancer therapy.

关键词： Polyethylene glycol Doxorubicin Prodrug Schiff-base reaction pH-Responsiveness

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Thin Film of Polyimide/Mof Nanocomposite Membrane with Substantially Improved Stability for Co2/Ch4 Separation

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SSRN 2022年

作者： Jin, Jian Zhu, Shouwen Wang, Zhenggong Bi, Xiangyu Shi, Yapeng Shi, Yanshu Zhang, Yatao College of Chemistry Chemical Engineering and Materials Science Collaborative Innovation Center of Suzhou Nano Science and Technology Innovation Center for Chemical Science Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application Soochow University Suzhou215123 China School of Chemical Engineering and Energy Zhengzhou University Zhengzhou450001 China

The development of thin-film nanocomposite (TFN) membranes is necessary due to the demand of high gas permeance for industrial applications. Nevertheless, it is a great challenge to achieve TFN membranes with stable separation performance owing to the high chain mobility in thin films. In this work, we report an efficient and less destructive coordination crosslinking strategy to improve the TFN membrane stability for CO2/CH4 separation. The selective layer of TFN membranes is made of carboxylated polyimide as matrix and UiO-66 nanoparticles as fillers. By immersing these TFN membranes in methanol solution containing Cu(NO3)2, coordination bonds are successfully constructed between Cu2+ and carboxyl groups (-COOH). The crosslinked TFN membranes exhibit high CO2/CH4 selectivity up to 29~35 with CO2 permeance of 110~350 GPU, outperforming most of previously reported TFN membranes. Moreover, the plasticization pressure of the crosslinked membranes improves from 0.3-0.9 MPa to 0.9-1.5 MPa. In the CO2/CH4 (50 v:50 v) mixed gas permeation tests, the crosslinked membranes remain constant CO2/CH4 selectivity at 23.9~25.2 with increasing feed gas pressure. The crosslinked membranes also demonstrate stable CO2/CH4 selectivity in the range of 27.2~31.2 within 100 hours testing time under 1.0 MPa CO2 partial pressure. © 2022, The Authors. All rights reserved.

关键词： Separation

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