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Magnetic NiFe_(2)O_(4)/Polypyrrole nanocomposites with enhanced electromagnetic wave absorption

Journal of Materials science & Technology 2022年第13期108卷 64-72页

作者： Jiang Guo Xu Li Zhuoran Chen Jianfeng Zhu Xianmin Mai Renbo Wei Kai Sun Hu Liu Yunxia Chen Nithesh Naik Zhanhu Guo School of Materials Science and Engineering Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic MaterialsShaanxi University of Science&TechnologyXi’an 710021China School of Urban Planning and Architecture Southwest Minzu UniversityChengdu 610041China School of Chemical Engineering Northwest UniversityXi’an 710069China College of Ocean Science and Engineering Shanghai Maritime UniversityShanghai201306China Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationNational Engineering Research Center for Advanced Polymer Processing TechnologyZhengzhou UniversityZhengzhou450001China School of Mechanical Engineering Shanghai Dianji UniversityShanghai201306China Department of Mechanical&Manufacturing Engineering Manipal Institute of TechnologyManipal Academy of Higher EducationManipal 576104KarnatakaIndia Integrated Composites Laboratory(ICL) Department of Chemical&Biomolecular EngineeringUniversity of TennesseeKnoxvilleTN37996USA

NiFe_(2)O_(4)/polypyrrole(NiFe_(2)O_(4)/PPy)nanocomposites are prepared by a simple surface-initiated polymerization method and demonstrate negative permittivity in the low frequency *** nanocomposites also exhibit significantly enhanced electromagnetic wave(EMW)absorption property in the high frequency *** with pure PPy,the enhanced negative permittivity is observed in the NiFe_(2)O_(4)/PPy nanocomposites with a NiFe_(2)O_(4)loading of 5.0,10.0,20.0 and 40.0 wt%,indicating the formation of metal-like electrical conducting network in NiFe_(2)O_(4)/PPy ***,the negative permittivity could be tuned by changing the NiFe_(2)O_(4)*** minimum reflection loss(RL)of-40.8 dB is observed in the 40.0 wt%NiFe_(2)O_(4)/PPy composites with a thickness of only 1.9 *** effective absorption bandwidth below-10.0 and-20.0 dB reaches 6.08 and 2.08 GHz,*** enhanced EMW absorption performance benefits from the improved independence matching,EMW attenuation capacity,and synergistic effects of conduction loss,dielectric loss(interfacial and dipole polarizations)and magnetic loss(exchange and natural resonances).This research work provides a guidance for the fabrication of nanocomposites with an excellent EMW absorption.

关键词： NiFe_(2)O_(4)/PPy composites Negative permittivity EMW absorption

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Conductive Mof Coating for Suppressing the Mn Dissolution in Limn2o4 Toward Long-Life Lithium-Ion Batteries

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SSRN 2024年

作者： Kim, Eunji Lee, Jeongmin Park, Junghyun Nam, Kwan Woo Department of Chemical Engineering and Materials Science Graduate Program in System Health Science and Engineering Ewha Womans University Seoul03760 Korea Republic of

Spinel lithium manganese oxide (LiMn2O4, denoted LMO) is one of the promising cathode materials with non-toxicity, high operating voltage, and low cost. However, structural collapse during battery cycling — caused by Mn dissolution and the Jahn-Teller effect — is a critical disadvantage, reducing cycle retention, particularly at high temperatures. In this investigation, to solve these critical issues of LMO cathode, we introduce Cu3(HITP)2, a conductive two-dimensional (2D) MOF as a surface coating material through a simple process. Coating the conductive 2D Cu3(HITP)2 MOF increases the electrical conductivity and shows the effect of suppressing the dissolution of Mn by enriching the surface of LMO with Mn4+. By suppressing Mn dissolution, structural stability also improves, resulting in offsetting all the inherent problems of LMO. As a result, at 50 °C, CuHITP–LMO exhibits an initial capacity of 98.7 mAh g–1 at 100 mA g–1 and achieved a capacity of 74.5 mAh g–1 after 100 cycles, indicating outstanding cyclability. This research highlights the potential of conductive 2D MOF to improve the electrochemical performances of battery cathode. © 2024, The Authors. All rights reserved.

关键词： Cathodes

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Recent progress in perovskite solar cells:material science

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science China Chemistry 2023年第1期66卷 10-64页

作者： Jiang-Yang Shao Dongmei Li Jiangjian Shi Chuang Ma Yousheng Wang Xiaomin Liu Xianyuan Jiang Mengmeng Hao Luozheng Zhang Chang Liu Yiting Jiang Zhenhan Wang Yu-Wu Zhong Shengzhong(Frank)Liu Yaohua Mai Yongsheng Liu Yixin Zhao Zhijun Ning Lianzhou Wang Baomin Xu Lei Meng Zuqiang Bian Ziyi Ge Xiaowei Zhan Jingbi You Yongfang Li Qingbo Meng Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China Laboratory for Renewable Energy(CAS) Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationShaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologyInstitute for Advanced Energy MaterialsSchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710119China Institute of New Energy Technology College of Information Science and TechnologyJinan UniversityGuangzhou 510632China School of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Physical Science and Technology Shanghai Tech UniversityShanghai 201210China Australian Institute for Bioengineering and Nanotechnology and School of Chemical Engineering The University of QueenslandSt LuciaBrisbaneQLD 4072Australia Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201China Key Laboratory of Polymer Chemistry and Physics of Ministry of Education School of Materials Science and EngineeringPeking UniversityBeijing 100871China Key Laboratory of Semiconductor Materials Science Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China Dalian National Laboratory for Clean Energy Collaborative Innovation Center of Chemistry for Energy Materials(iChEM)Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Key Laboratory of Funct

Perovskite solar cells represent a promising third-generation photovoltaic technology with low fabrication cost and high power conversion *** light of the rapid development of perovskite materials and devices,a systematic survey on the latest advancements covering a broad range of related work is urgently *** review summarizes the recent major advances in the research of perovskite solar cells from a material science *** discussed topics include the devices based on different type of perovskites(organic-inorganic hybrid,all-inorganic,and lead-free perovskite and perovskite quantum dots),the properties of perovskite defects,different type of charge transport materials(organic,polymeric,and inorganic hole transport materials and inorganic and organic electron transport materials),counter electrodes,and interfacial materials used to improve the efficiency and stability of *** discussions focus on the key progresses reported within the recent five ***,the major issues limiting the production of perovskite solar cells and the prospects for the future development of related materials are discussed.

关键词： perovskite solar cells power conversion efficiency perovskite materials hole transport materials electron transport materials counter electrode materials interfacial functional materials defects

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Anti-inflammatory, antibacterial, and antioxidative bioactive glass-based nanofibrous dressing enables scarless wound healing

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Smart Materials in Medicine 2023年第1期4卷 407-426页

作者： Yuan, Zhengchao Zhang, Lixiang Jiang, Shichao Shafiq, Muhammad Cai, Youjun Chen, Yujie Song, Jiahui Yu, Xiao Ijima, Hiroyuki Xu, Yuan Mo, Xiumei State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine College of Biological Science and Medical Engineering Donghua University Shanghai201620 China Department of Orthopaedics Xinqiao Hospital Army Military Medical University No. 183 Xinqiao Street Shapingba District Chongqing400037 China Department of Orthopedics Shandong Provincial Hospital Affiliated to Shandong First Medical University Jinan250021 China Medical Science and Technology Innovation Center Shandong First Medical University & Shandong Academy of Medical Sciences Jinan250117 China Department of Chemical Engineering Faculty of Engineering Graduate School Kyushu University 744 Motooka Nishi-ku Fukuoka-shi Fukuoka819-0395 Japan Lahore54000 Pakistan

Excessive scar tissue formation along with bacterial infection, hemorrhage, and oxidative wound microenvironment pose adverse physiological and psychological effects on patients, which necessitate the advent of innovative anti-inflammatory, anti-bacterial, and anti-oxidative multifunctional wound dressings. The overarching objective of this study was to exploit bioactive glass (BG) and a natural anti-bacterial component namely "oregano essential oil (OEO)" to impart multifunctionality to poly(L-lactide-co-glycolide)/Gelatin (PLGA/Gel)-based nanofibrous dressings for excisional wound management. We performed a series of structural, morphological, and release studies as well as delineated angiogenic, hemostatic, anti-bacterial, and anti-oxidative properties of these bioactive dressings in vitro, which altogether revealed the beneficial effects of BG and OEO in terms of rapid hemostasis, improved chemotactic response, diminished bacterial colonization, and anti-inflammatory response. Impressively, in multiple injury models, including a rat tail-amputation model, an ear artery injury model, and a liver trauma model in rabbit in vivo, we reported BG-mediated rapid hemostasis. Moreover, dressings containing BG showed improved hemocompatibility and suppressed coagulation as revealed by activated partial thromboplastin assay (APTT) in vitro. In addition, the transplantation of these nanofibrous dressings in a full-thickness excisional wound model in rats showed significant tissue regeneration as evidenced by the more number of blood vessels, glands, and hair follicles, re-epithelialization, diminished inflammatory response, and less fibrotic tissue formation. Taken together our approach of simultaneously harnessing economical BG and OEO to enable multifunctionality to nanofibrous dressings for tissue repair may hold great promise for wound healing as well as other bio-related disciplines. © 2023 The Authors

关键词： Biocompatibility

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Skin Temperature-Triggered Switchable Adhesive Coatings for Wearing Comfortable Epidermal Electronics

SSRN

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SSRN 2024年

作者： Zheng, Yan Wu, Ming Duan, Minzhi Jin, Qi Chen, Shuangjun Wang, Xiaoliang Zhou, Dongshan Department of Polymer Science and Engineering College of Materials Science and Engineering Nanjing Tech University Jiangsu Nanjing211816 China Department of Polymer Science and Engineering State Key Laboratory of Coordination Chemistry Key Laboratory of High Performance Polymer Material and Technology MOE School of Chemistry and Chemical Engineering Nanjing University Jiangsu Nanjing210023 China

Smart adhesives with switchable adhesion strength on demand are crucial for ensuring the stability of the epidermal electronics-skin interface and preventing skin damage caused by device detachment. However, challenges such as harsh triggering conditions, lack of precise control over material comprehensive performance, and difficulty in achieving micron-level controlled integration of materials on device surfaces hinder the application of switchable adhesives in epidermal electronics. Herein, we designed a coatable, thermally-triggered switchable adhesive that has a high adhesion of 68.8 N/m at skin temperature, e.g., 33°C, and after a slight cooling, e.g., 20°C, the adhesion decreases to 6.59 N/m, resulting in a high switching ratio of 10.4. The switching time is © 2024, The Authors. All rights reserved.

关键词： Adhesion

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A visible-light-driven CoS_(2)/CuS@CNT-C_(3)N_(4)photocatalyst for high-performance rechargeable zinc-air batteries beyond 500 mW cm^(-2)

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Chinese Journal of Catalysis 2025年第1期68卷 300-310页

作者： Yang Zhang Nengneng Xu Bingbing Gong Xiaoxiao Ye Yi Yang Zhaodi Wang Biyan Zhuang Min Wang Woochul Yang Guicheng Liu Joong Kee Lee Jinli Qiao State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Environmental Science and EngineeringDonghua UniversityShanghai 201620China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China School of Chemical Engineering and Technology Xinjiang UniversityUrumqi 830017XinjiangChina School of Chemistry and Chemical Engineering Yancheng Institute of TechnologyYancheng 224051JiangsuChina Department of Physics Dongguk UniversitySeoul 04620Korea School of Energy Power and Mechanical Engineering North China Electric Power UniversityBeijing 102206China Department of Chemical&Biochemical Eng Gachon UniversitySeongnam-si 13120Korea

Storing solar energy in battery systems is crucial to achieving a green and sustainable ***,the efficient development of photo-enhanced zinc-air batteries(ZABs)is limited by the rapid recombination of photogenerated carriers on the *** this work,the visible-light-driven CoS_(2)/CuS@CNT-C_(3)N_(4)photocatalyst with unique petal-like layer structure was designed and developed,which can be used as air electrode for visible-light-driven *** superior performance of ZABs assembled by CoS_(2)/CuS@CNT-C_(3)N_(4)was mainly attributed to the successful construction of Schottky heterojunction between g-C_(3)N_(4)and carbon nanotubes(CNTs),which accelerates the transfer of electrons from g-C_(3)N_(4)to CoS_(2)/CuS cocatalysts,improves the carrier separation ability,and extends the carrier ***,the visible-driven ZABs assembled by CoS_(2)/CuS@CNT-C_(3)N_(4)photocatalyst has a power density of 588.90 mW cm^(-2) and a charge-discharge cycle of 643 h under visible light irradiation,which is the highest performance ever reported for photo-enhanced *** importantly,the charge-discharge voltage drop of ZABs was only 0.54 V under visible light irradiation,which is significantly lower than the voltage drop(0.94 V)in the *** study provides a new idea for designing efficient and stable visible-light-driven ZABs cathode catalysts.

关键词： Visible-light-driven CoS_(2)/CuS@CNT-C_(3)N_(4)photocatalyst Zinc-air battery Heterojunction Photogenerated carriers

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Sustainable Super-Insulating Packaging Composite from Recycled Wood

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Advanced Sustainable Systems 2024年第4期8卷

作者： Liu, I-Tseng You, Jhu-Lin Tung, Shih-Huang Liao, Ying-Chih Department of Chemical Engineering National Taiwan University Taipei10617 Taiwan Institute of Polymer Science and Engineering National Taiwan University Taipei10617 Taiwan Department of Chemical & Materials Engineering Chung Cheng Institute of Technology National Defense University Taoyuan335 Taiwan

Thermal insulation materials (TIMs) have been widely used over the past century. In this landscape, expandable polystyrene (EPS) is the dominant choice;however, the waste management of EPS is hampered by recycling challenges and lack of economic incentives. Concurrently, the order delivery and pharmaceutical distribution have experienced significant growth due to lifestyle shifts after the pandemic. For instance, the utilization of drones for transportation is illustrated (see abstract figure) as a prospective alternative transportation protocol. In this work, a synthetic method is developed to prepare bio-degradable thermal insulator material from recycled wood and silica aerogel. The silica aerogel wood composite (SAWc) has the following properties: 1) low carbon emission (4.932 kg CO2e kg−1);2) low thermal conductivity (0.032 W mK−1) with an anisotropy of 1.5;3) high compressive strength (yield stress = 8.60 Mpa);4) excellent resistance to organic solvents;5) high biodegradability (49.4% weight loss after 28 days);6) excellent flame retardancy, both of which are above EPS. The scalable, super-insulating, and robust thermal insulator, as demonstrated in this work, holds high potential as an alternative packaging material poised to shape the next era in thermal insulation solutions. © 2024 Wiley-VCH GmbH.

关键词： Thermal conductivity

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Structural evaluation of Poly(lactic acid) degradation at standardized composting temperature of 58 degrees

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Chemosphere 2024年 354卷 141729页

作者： Oh, Jiwon Park, Sung Bae Cha, Chaenyung Hwang, Dong Ki Park, Seul-A Park, Jeyoung Oh, Dongyeop X. Jeon, Hyeonyeol Koo, Jun Mo Ulsan44429 Korea Republic of Ulsan44919 Korea Republic of Pohang37673 Korea Republic of Department of Chemical and Biomolecular Engineering Sogang University Seoul04107 Korea Republic of Department of Polymer Science and Engineering and Program in Environmental and Polymer Engineering Inha University Incheon22212 Korea Republic of Daejeon34113 Korea Republic of Department of Organic Materials Engineering Chungnam National University Daejeon34134 Korea Republic of

The accumulation of petroleum-based plastics on our planet is causing serious environmental pollution. Biodegradable plastics, promoted as eco-friendly solutions, hold the potential to address this issue. However, their impact on the environment and the mechanisms of their natural degradation remain inadequately understood. Furthermore, the specific conditions set forth in international standards for evaluating the biodegradability of biodegradable plastics have led to misconceptions about their real-world behavior. To properly elucidate the relationship between their degradability and structure, this study mimics the thermal effect on poly(lactic acid) (PLA) under standardized composting temperature. The higher the crystallinity of PLA, the lower the degradation rate, which suggests that crystallinity is a key factor in determining degradation. The composting temperature of 58 °C induces crystallization by having a structural effect on the polymer, which in turn reduces the degradation rate of PLA. Therefore, control over temperature and crystallization during the processing and degradation of PLA is crucial, as it not only determines the biodegradability but also enhances the utility. © 2024

关键词： Biodegradability

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Goldilocks Energy Minimum: Peptide-Based Reversible Aggregation and Biosensing (Vol 15, Pg 42293, 2023)

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ACS APPLIED MATERIALS & INTERFACES 2023年第41期15卷 48838-48838页

作者： Yim, Wonjun Retout, Maurice Chen, Amanda A. Ling, Chuxuan Amer, Lubna Jin, Zhicheng Chang, Yu-Ci Chavez, Saul Barrios, Karen Lam, Benjamin Li, Zhi Zhou, Jiajing Shi, Lingyan Pascal, Tod A. Jokerst, Jesse V. Materials Science and Engineering Program University of California San Diego La Jolla California 92093 United States Department of Nano and Chemical Engineering University of California San Diego La Jolla California 92093 United States Shu Chien-Gene Lay Department of Bioengineering University of California San Diego La Jolla California 92093 United States Department of Radiology University of California San Diego La Jolla California 92093 United States

Colorimetric biosensors based on gold nanoparticle (AuNP) aggregation are often challenged by matrix interference in biofluids, poor specificity, and limited utility with clinical samples. Here, we propose a peptide-driven nanoscale disassembly approach, where AuNP aggregates induced by electrostatic attractions are dissociated in response to proteolytic cleavage. Initially, citrate-coated AuNPs were assembled via a short cationic peptide (RRK) and characterized by experiments and simulations. The dissociation peptides were then used to reversibly dissociate the AuNP aggregates as a function of target protease detection, i.e., main protease (Mpro), a biomarker for severe acute respiratory syndrome coronavirus 2. The dissociation propensity depends on peptide length, hydrophilicity, charge, and ligand architecture. Finally, our dissociation strategy provides a rapid and distinct optical signal through Mpro cleavage with a detection limit of 12.3 nM in saliva. Our dissociation peptide effectively dissociates plasmonic assemblies in diverse matrices including 100% human saliva, urine, plasma, and seawater, as well as other types of plasmonic nanoparticles such as silver. Our peptide-enabled dissociation platform provides a simple, matrix-insensitive, and versatile method for protease sensing.

关键词： colorimetric biosensor DLVO theory reversible aggregation dissociation peptide matrix-insensitive SARS-CoV-19

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New Insights into Tackling Large Amplitude Oscillatory Shear (Laos): An Analytic Laos Approach (Alaos)

SSRN

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SSRN 2024年

作者： Wang, Pengguang Xu, Jiatong Zhou, Ziyu Zhang, Hongbin Advanced Rheology Institute Department of Polymer Science and Engineering School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Shanghai200240 China

Large amplitude oscillatory shear (LAOS) has been widely applied for performing rheological analysis of complex fluids, especially the yield stress fluids (YSFs) encountered in nature, daily life, or industry. The Fourier transform (FT) rheology is considered one of the mainstays in LAOS since FT is an essential mathematic tool applied in numerous signal analysis fields. However, the challenge of understanding FT, diverse mathematical frameworks, and complicated data processing impede the intuitive accessibility and efficient implementation of the existing, even admirably successful LAOS methods. Thus, the development of novel LAOS methods and simplification in methodology remains an unmet need. In this context, motivated by analytic geometry using coordinates instead of geometries, an analytical perspective in LAOS was highlighted by abstracting Fourier coefficients from stress/strain waveforms and substituting them into analytical solutions of LAOS methods, thereby proposing a new analytic LAOS (aLAOS) approach to tackle LAOS by reversely using the methodology of FT rheology. More specifically, the rheological signals and measures can be precisely reconstructed using Fourier coefficients instead of processing stress/strain waveforms. The influences of even harmonics on LAOS methods were described. Furthermore, considering the acquired results from the LAOS tests on the various typical YSFs, it was demonstrated that the aLAOS method yielded the same results as other methods and could visually distinguish the contribution of arbitrary higher harmonics. Consequently, the proposed approach showed potentially as an alternative approach of a non-trivial candidate for the convenient treatment of LAOS, thus utilizing as a tool to assist in the calculations of existing methodologies. © 2024, The Authors. All rights reserved.

关键词： Fourier transforms

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