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Facile Synthesis of Polyisothioureas via Alternating Copolymerization of Aziridines and Isothiocayanates

Chinese Journal of polymer science 2024年第3期42卷 292-298,I0005页

作者： Hao-Tian Zhang Ming-Xin Niu Qi Zhang Chen-Yang Hu Xuan Pang Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Department of Materials Science and Engineering Jilin UniversityChangchun 130025China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China

Isothiourea is an important class of sulfur-containing molecules showing unique catalytic and biological activities. As such,polyisothiourea is envisioned to be an interesting type of polymer that potentially exhibits a number of interesting properties. However, there is no access to synthesizing well-defined polyisothiourea, and currently isothiourea-containing polymers are mainly prepared by immobilizing onto other polymer's side chain. Herein, we report the first facile synthesis of polyisothioureas via alternating copolymerization of aziridines and isothiocayanates. Mediated by the catalytic system of phosphazene superbases/alcohol, a broad scope of aziridines and isothiocayanates could be transformed into polyisothioureas with adjustable substitutions(11 examples). The structures of obtained polyisothioureas were fully characterized with ^(1)H-NMR, ^(13)C-NMR, and ^(1)H-^(13)C HMBC NMR. Moreover, the polyisothioureas show tunable thermal properties depending on substitutions on the isothiourea linkages. The novel structure of these polyisothioureas will enable a powerful platform for the discovery of nextgeneration functional plastics.

关键词： Polyisothioureas Alternative copolymer Aziridines Isothiocayanates

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A highly visible-transparent thermochromic smart window with broadband infrared modulation for all-season energy savings

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National science Review 2025年第2期12卷 197-207页

作者： Yi Jiang Yunlong Wang Deshuo Kong Zipeng Chen Zhengwei Yang Ningning Cao Haowen Chi Shining Zhu Qiuhong Zhang Jia Zhu Bin Zhu National Laboratory of Solid State Microstructures College of Engineering and Applied SciencesJiangsu Key Laboratory of Artificial Functional MaterialsFrontiers Science Center for Critical Earth Material Cycling Collaborative Innovation Center of Advanced MicrostructuresNanjing University Key Laboratory of High Performance Polymer Material and Technology of MOE Department of Polymer Science and Engineering School of Chemistry and Chemical EngineeringNanjing University

Thermochromic smart windows effectively reduce the energy consumption for buildings through passive light modulation including the transmission of visible(TVis) and near-infrared(TNIR) light, and the emissivity of mid-infrared light(εMIR) in response to ambient temperature change. However,thermochromic windows that maintain high TViswhile modulating TNIRand εMIRsimultaneously are highly desirable but still challenging. Here, we develop a thermochromic smart window based on a two-way shape memory polymer to enable reversible transformation and achieve TNIRmodulation of 44.0% and εMIRmodulation of 76.5% while maintaining high TVis（>50%）. Compared to traditional windows based on silica glass, this device shows 4℃ lower temperature in summer daytime, 2℃ higher in winter daytime,and 1℃ higher in spring nighttime. It is expected that our device can achieve greater annual energy savings in comparison with commercial glass anywhere in the world and promote the progress of thermochromic windows for energy-efficient buildings.

关键词： thermochromic smart window visible transparency infrared modulation two-way shape memory polymer

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Electrospinning engineering of gas electrodes for high-performance lithium-gas batteries

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Carbon Energy 2024年第10期6卷 353-398页

作者： Jingzhao Wang Xin Chen Jianan Wang Xiangming Cui Ze Wang Guangpeng Zhang Wei Lyu Maxim Shkunov S.Ravi P.Silva Yaozu Liao Kai Yang Wei Yan State Key Laboratory of Multiphase Flow in Power Engineering Department of Environmental Science and EngineeringSchool of Energy and Power EngineeringXi'an Jiaotong UniversityXi'anChina Advanced Technology Institute University of SurreyGuildfordSurreyUK State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghaiChina

Lithium-gas batteries(LGBs)have garnered significant attention due to their impressive high-energy densities and unique gas conversion ***,the practical application of LGBs faces substantial challenges,including sluggish gas conversion kinetics inducing in low-rate performance and high overpotential,along with limited electrochemical reversibility leading to poor cycle *** imperative task is to develop gas electrodes with remarkable catalytic activity,abundant active sites,and exceptional electrochemical ***,a versatile and well-established technique for fabricating fibrous nanomaterials,has been extensively explored in LGB *** this work,we emphasize the critical structure-property for ideal gas electrodes and summarize the advancement of employing electrospun nanofibers(NFs)for performance enhancement in *** elucidating the fundamental principles of LGBs and the electrospinning technique,we focus on the systematic design of electrospun NF-based gas electrodes regarding optimal structural fabrication,catalyst handling and activation,and catalytic site optimization,as well as considerations for large-scale *** demonstrated principles and regulations for electrode design are expected to inspire broad applications in catalyst-based energy applications.

关键词： carbon nanofibers electrocatalyst electrospinning gas electrodes metal-gas batteries

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Polyolefin vitrimers bearing acetoacetate functionality

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science China Chemistry 2024年第11期67卷 3861-3867页

作者： Zihao Wang Yue Liu Wenmin Pang Ao Chen Min Chen Chinese Academy of Sciences(CAS)Key Laboratory of Soft Matter Chemistry Department of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China Institutes of Physical Science and Information Technology Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of EducationAnhui UniversityHefei 230601China

Polyolefin vitrimers are polymer networks bearing reversible covalent crosslinking points, enabling them to be reprocessed and recycled. In this contribution, a series of polyolefin vitrimers were designed based on the acetoacetate-functionalized polyolefin copolymers, which were produced through the direct copolymerization of ethylene with polar comonomers using a phosphinesulfonate palladium catalyst. The pendant acetoacetate group could mediate several characteristic reactions, such as the Michael addition reaction, ketone-amine condensation and metal coordination reaction. As such, structurally adjustable polyolefin vitrimers can be accessed by introducing various dynamic crosslinking bonds, including disulfide exchange, transamination of vinylogous urethane and labile metal coordination bond. The utilization of different crosslinking reactions and the mole ratio of crosslinkers significantly impact the material properties of the resultant polymers. Specifically, the generated polyolefin vitrimers demonstrated excellent reprocessability and closed-loop recycling properties. The study in this work provides an efficient strategy to access various polyolefin vitrimers.

关键词： polyolefin vitrimers acetoacetate group polar monomer olefin copolymerization

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Corrosion Inhibitor of API Pipeline Steels: A Review

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Journal of Bio- and Tribo-Corrosion 2025年第2期11卷 1-31页

作者： Yeganeh, Mahdi Heydarie, Yousef Shahryari, Zahra Asadi, Najmeh Kahkesh, Homa Ramezanalizadeh, Hosein Department of Materials Science and Engineering Faculty of Engineering Shahid Chamran University of Ahvaz Ahvaz Iran Department of Chemical and Materials Engineering Sirjan University of Technology Sirjan78137-33385 Iran Department of Chemistry Faculty of Science Shahid Chamran University of Ahvaz Ahvaz Iran Department of Materials and Polymer Engineering Faculty of Engineering Hakim Sabzevari University P.O. Box 397 Sabzevar Iran

Crude oil and natural gas are essential hydrocarbon resources extensively utilized in various energy sectors worldwide. The transportation of these resources from production sites to refineries relies heavily on pipelines, which must meet stringent standards for strength, durability, and corrosion resistance. High-strength low-alloy (HSLA) steels are the preferred materials for oil and gas pipelines due to their superior mechanical properties, weldability, and resistance to cracking and corrosion. The American Petroleum Institute (API) standards, widely recognized globally, categorize pipeline materials into PSL 1 and PSL 2, with grades ranging from A25 to X120. Maintaining the integrity of API pipelines is crucial to ensuring the safe and efficient transportation of oil and gas. However, corrosion, a major threat, can lead to leaks, environmental damage, and safety risks. One effective method for preventing corrosion in metals and alloys is the use of inhibitors. This review offers a succinct synopsis of the many kinds of corrosion inhibitors. This paper reviews the effectiveness of various corrosion inhibitors, including natural and synthetic compounds, in protecting API pipeline steels in harsh environments. This review explains how different green inhibitors, organic and inorganic inhibitors, polymer inhibitors, and some of the other inhibitors that have been deployed thus far function in protecting the API pipeline. Moreover, this article can be significant for advancing knowledge and guiding industry practices. By synthesizing existing research, this review provides valuable insights into the strengths and limitations of various inhibitors, aiding in informed decision-making. Highlighting eco-friendly inhibitors promotes environmental sustainability, while comparing cost-effectiveness supports economic efficiency. Additionally, this review enhances safety by identifying the most effective corrosion control methods, fosters innovation by showcasing emerging tre

关键词： Pipeline corrosion

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Data and Machine Learning in polymer science

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Chinese Journal of polymer science 2023年第9期41卷 1371-1376,I0006页

作者： Yun-Qi Li Ying Jiang Li-Quan Wang Jian-Feng Li Department of Polymer Materials and Engineering College of Materials and MetallurgyGuizhou UniversityGuiyang550025China School of Chemistry Beihang UniversityBeijing100191China Shanghai Key Laboratory of Advanced Polymeric Materials School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237China The State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai200433China

Data-driven innovation has shown great power in solving problems in multifactor correlation,convergence and optimization,synergistic and antagonistic effects,pattern and boundary identification,critical behavior and phase transition,which are ubiquitous in polymer *** for the in-depth understanding of physical problems or in the discovery of new polymer materials,integrating data and machine learning into conventional experimental,theoritical,modeling and simulation approaches becomes *** we present a perspective based on our research interests,highlight some key issues and provide a prospection in this emerging *** focus on a number of typical advances in the description and identification of polymer conformation and structures,and the interpretation and prediction of structureproperty correlations,that have applied data and machine learning in polymer science.

关键词： Machine learning Big data Structure-property relationship Optimization Prediction

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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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Water-soluble Cu30 nanoclusters as a click chemistry catalyst for living cell labeling via azide-alkyne cycloaddition

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Nano Research 2023年第1期16卷 1748-1754页

作者： Ge Yang Yali Xie Yaru Wang Ying Tang Leng Leng Chng Fuyi Jiang Fanglin Du Xianfeng Zhou Jackie Y.Ying Xun Yuan School of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042China Key Lab of Biobased Polymer Materials of Shandong Provincial Education Department School of Polymer Science and EngineeringQingdao University of Science and TechnologyQingdao 266042China NanoBio Lab Institute of Materials Research and Engineering(IMRE)Agency for ScienceTechnology and Research(A*STAR)31 Biopolis WayThe NanosSingapore 138669Singapore School of Environment and Material Engineering Yantai UniversityYantai 264005China NanoBio Lab A*STAR Infectious Diseases LabsA*STAR31 Biopolis WayThe NanosSingapore 138669Singapore

Cu(I)-catalyzed azide-alkyne cycloadditions(CuAAC)have gained increasing interest in the selective labeling of living cells and organisms with ***,their application is constrained either by the high cytotoxicity of Cu(I)ions or the low activity of CuAAC in the internal space of living *** paper reports the design of a novel Cu-based nanocatalyst,watersoluble thiolated Cu30 nanoclusters(NCs),for living cell labeling via *** Cu30 NCs offer good biocompatibility,excellent stability,and scalable synthesis(e.g.,gram scale),which would facilitate potential commercial *** combining the highly localized Cu(I)active species on the NC surface and good structural stability,the Cu30 NCs exhibit superior catalytic activities for a series of Huisgen cycloaddition reactions with good *** importantly,the biocompatibility of the Cu30 NCs enables them to be a good catalyst for CuAAC,whereby the challenging labeling of living cells can be achieved via CuAAC on the cell *** study sheds light on the facile synthesis of atomically precise Cu NCs,as well as the design of novel Cu NCs-based nanocatalysts for CuAAC in intracellular bioorthogonal applications.

关键词： Cu nanocluster click chemistry catalysis azide-alkyne cycloaddition living cell labeling

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Application of a Self-Assembly Sensing Layer to Grating Sensor Cabinets for Biomedical Sensing of Rheumatoid Arthritis Antigen-Antibodies

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IEEE Sensors Journal 2024年第7期24卷 10039-10047页

作者： Wen, Hsin-Yi Hsu, Hsiang-Cheng Feng, Wen-Kai Jhan, Kai-Siang Yeh, Yao-Tsung Chiang, Chia-Chin National Kaohsiung University of Science and Technology Department of Chemical and Materials Engineering Kaohsiung80778 Taiwan National Kaohsiung University of Science and Technology College of Maritime Department of Ph.D. Program in Maritime Science and Technology Kaohsiung807618 Taiwan National Kaohsiung University of Science and Technology Department of Mechanical Engineering Kaohsiung80778 Taiwan Fooyin University Department of Medical Laboratory Science and Biotechnology Kaohsiung83102 Taiwan

In this article, we harnessed biomedical applications in laser-assisted etching long-period fiber gratings (LLPFGs) sensors, subsequently deploying them within the realm of biomedical applications. The primary aim of this study was to devise a sensitive method for the detection of antigen-antibodies associated with rheumatoid arthritis (RA) using LLPFGs. Sensing the antigen binding took place on the surface of the optical fiber through a self-assembling process. Given the inherent limitations of conventional rheumatoid factor (RF) testing in terms of specificity, we introduced an innovative serum-based approach geared toward the identification of anti-cyclic citrullinated peptide (Anti-CCP) antibodies. This method exhibited an impressive diagnostic accuracy rate of approximately 80% for RA cases, coupled with an exceptional specificity level of 98% for individuals without RA. The incorporation of LLPFGs in the detection of RA antigen-antibodies presents a highly promising avenue for enhancing the precision and reliability of RA diagnosis. Furthermore, this research aligns closely with the United Nations Sustainable Development Goal (SDG)3, which strives to promote well-being across all age groups and advance sustainable development by addressing health-related challenges, including the accurate diagnosis of diseases like RA. © 2023 IEEE.

关键词： Antibodies

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Challenges and Opportunities of Precision polymer Chemistry

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Chinese Journal of polymer science 2022年第10期40卷 1129-1130页

作者： Shiyong Liu CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and EngineeringSchool of Chemistry and Materials ScienceUniversity of Science and Technology of China(USTC)

Since Hermann Staudinger coined the revolutionary concept of macromolecules in 1920, synthetic polymers have served as a major game changer to our society and become indispensable in our daily lives. Unlike biomacromolecules (e.g., DNA and proteins) possessing precise molar masses/chain sequences/topologies and specific biological functions, synthetic polymers are abiotic materials characterized by broad chain length distributions and undefined sequences. To bridge the gap between natural and synthetic polymers, the biomimetic synthesis of polymers with precise chain length, sequences and topologies has been long pursued and yet unmet in polymer science.

关键词： precise sequences synthetic

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