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Facile scalable one-step wet-spinning of surgical sutures with shape memory function and antibacterial activity for wound healing

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Chinese Chemical Letters 2020年第6期31卷 1499-1503页

作者： Xinghan Chen pengfei tan Ya Wen Wencheng Zhou Ying Cen Chao You Lin tan Meng Tian Department of Burns and Plastic Surgery and Neurosurgery Research LaboratoryWest China HospitalSichuan University.Chengdu 610041China College of Biomass Science and Engineering Sichuan UniversityChengdu 610065China Department of Neurosurgery West China HospitalSichuan UniversityChengdu 610041China Key Laboratory of Leather Chemistry and Engineering of Ministry of Education Sichuan UniversityChengdu 610065China

Surgical suture is commonly used in clinic due to its action in accelerating the process of wound ***,difficultly handling in minimally invasive surgery and bacteria-induced infection usually limit its use in a wide range of ***,we report a facile scalable strategy to fabricate surgical sutures with shape memory function and antibacterial activity for wound ***,a shape memory polyurethane(SMPU)with a transition temperature(Ttrans)at 41.3℃was synthesized by adjusting the mole ratio of the hard/soft segment,and then the shape memory surgical sutures containing polyhexamethylene biguanide hydrochloride(PHMB)as a model drug for antibacterial activity were fabricated by a facile scalable one-step wet-spinning approach,in which PHMB was directly dissolved in the coagulation bath that enable its loading into the sutures through the dual diffusion during the phase *** prepared sutures were characterized by their morphology,mechanical properties,shape memory,antibacterial activity,as well as biocompatibility before the wound healing capability was tested in a mouse skin suture-wound *** was demonstrated that the optimized suture is capable of both shape memory function and antibacterial activity,and promote wound healing,suggesting that the facile scalable one-step wet-spinning strategy provides a promising tool to fabricate surgical sutures for wound healing.

关键词： Wet-spinning Shape memory Antibacterial activity Surgical suture Wound healing

Microbial synthesis of N, P co-doped carbon supported PtCu catalysts for oxygen reduction reaction

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Journal of Energy Chemistry 2023年第9期84卷 486-495页

作者： Shaohui Zhang Suying Liu Jingwen Huang Haikun Zhou Xuanzhi Liu pengfei tan Haoyun Chen Yili Liang Jun Pan State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083HunanChina State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082HunanChina School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083HunanChina School of Resources and Environment Hunan University of Technology and BusinessChangsha 410205HunanChina

Developing highly efficient and stable platinum-based electrocatalyst for oxygen reduction reaction(ORR) is critical to expediting commercialization of fuel ***,several PtCu alloy nanocatalysts supported on N,P co-doped carbon(PtCu/NPC) were prepared by microbial-sorption and *** them,PtCu/NPC-700 ℃ exhibits excellent catalytic performance for ORR with a mass activity of 0.895 A mg_(pt)^(-1)(@0.9 V) which is 8.29 folds of commercial Pt/***,the ECSA and MA of PtCu/NPC-700℃ only decrease by 14.2% and 18.7% respectively,while Pt/C decreases by 35.2% and 52.8% after 10,000 cycles of ADT ***,the PtCu/NPC-700℃ catalyst emanates a maximum power density of 715 mW cm^(-2) and only 11.1% loss of maximum power density after 10,000 ADTs in single-cell test,indicating PtCu/NPC-700℃ also manifests higher activity and durability in actual single-cell operation than Pt/*** research provides an easy and novel strategy for developing highly active and durable Pt-based alloy catalyst.

关键词： Microbial synthesis N P co-doping PtCu catalyst Oxygen reduction reaction

Defect-manipulated magnetoresistance and above-room-temperature ferromagnetism in two-dimensional BaNi_(2)V_(2)O_(8)

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Chinese Chemical Letters 2024年第3期35卷 523-527页

作者： pengfei tan Chuanhui Zhu Jinjin Yang Shuang Zhao Tao Xia Mei-Huan Zhao Tao Han Zheng Deng Man-Rong Li Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of ChemistrySun Yat-sen UniversityGuangzhou 510006China School of Science and Engineering The Chinese University of Hong KongShenzhen 518172China Institute of Physics Chinese Academy of SciencesBeijing 100190China School of Science Hainan UniversityHaikou 570228China

The intricate correlation between multiple degrees of freedom and physical properties is a fascinating area in solid state chemistry and condensed matter ***,we report a quantum-magnetic system BaNi_(2)V_(2)O_(8)(BNVO),in which the spin correlation was modulated by unusual oxidation state,leading to different magnetic *** BNVO was modified with topochemical reduction(TR)to yield TR-BNVO with partially reduced valance state of Ni^(+)in the two-dimensional NiO_(6)-honeycomb ***,the antiferromagnetic order is suppressed by the introduction of locally interposed Ni^(+)and oxygen vacancies,resulting in a ferromagnetic ground state with the transition temperature up to 710 K.A positive magnetoresistance(7.5%)was observed in the TR-BNVO at 40 K under 7 *** findings show that topological reduction is a powerful approach to engineer low-dimensional materials and accelerate the discovery of new quantum magnetism.

关键词： Layered honeycomb oxide Topochemical reduction Oxygen vacancies Ferromagnetism Magnetoresistance

高层非局地热力平衡大气对红外临边辐射的影响分析

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光学学报 2014年第10期34卷 1-7页

作者：谭鹏飞韩玉阁宣益民南京理工大学能源与动力工程学院江苏南京210094

采用大气逐线辐射传递计算模型——前向参考辐射模型(RFM),计算了高层大气在局地热力平衡状态(LTE)与非局地热力平衡状态(non-LTE)条件下主要大气分子红外光谱带的临边辐射。以定义的相对偏差为指标,分析了白天与夜间情况下non-LTE大气... 详细信息

采用大气逐线辐射传递计算模型——前向参考辐射模型(RFM),计算了高层大气在局地热力平衡状态(LTE)与非局地热力平衡状态(non-LTE)条件下主要大气分子红外光谱带的临边辐射。以定义的相对偏差为指标,分析了白天与夜间情况下non-LTE大气对红外临边辐射的影响,确定了LTE条件的大气高度适用范围,并对白天与夜间的临边辐射进行比较。分析结果表明,高层大气在non-LTE与LTE条件下的红外临边辐射有显著偏差,白天太阳抽运作用会增加这两种条件下的偏差。在白天与夜间环境下,部分光谱带的辐射会有明显差异。除白天CO24.3μm光谱带外,其他光谱带在60km以下non-LTE与LTE不会有较明显偏离,其中CO215μm光谱带能达到80km左右。分析结果可为高层大气辐射计算模型提拱理论基础。

关键词：大气光学非局地热力平衡状态前向参考辐射模型高层大气红外临边辐射

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先进民机飞控系统发展的需求与设计考虑

中国科学：技术科学 2018年第3期48卷 237-247页

作者：石鹏飞谭智勇陈洁中国航空工业集团公司西安飞行自动控制研究所西安710065

随着现代民用航空业的发展以及日益激烈的市场竞争环境,对民用飞机机载设备的要求不断提高,尤其是安全性、经济性、舒适性和环保性需求.飞行控制系统如何实现技术能力提升来满足这些需求,成为先进民用飞机的飞行控制系统设计与研制必须... 详细信息

随着现代民用航空业的发展以及日益激烈的市场竞争环境,对民用飞机机载设备的要求不断提高,尤其是安全性、经济性、舒适性和环保性需求.飞行控制系统如何实现技术能力提升来满足这些需求,成为先进民用飞机的飞行控制系统设计与研制必须考虑的问题.本文分析和回顾了国内外典型系列民用飞机的飞行控制系统技术的发展趋势,提炼了民用飞机的飞行控制系统进一步发展面临的需求,并针对性地提出了对飞行控制系统的设计考虑.

关键词：电传飞控系统民机飞控系统高安全架构电功率作动主动控制技术

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等待系统软件/硬件可靠性模型

计算机学报 1989年第7期12卷 516-524页

作者：杨鹏飞谭维康北方交通大学

本文概括了近年来的研究成果,把众多模型的建立归纳为四种方法,提出了更具有一般性的等待系统的概念,并用马尔可夫更新过程建立了等待系统的可靠性模型.计算结果表明,等待模型包含了某些现有的软件/硬件模型.文中定义了等待率函数,并作... 详细信息

本文概括了近年来的研究成果,把众多模型的建立归纳为四种方法,提出了更具有一般性的等待系统的概念,并用马尔可夫更新过程建立了等待系统的可靠性模型.计算结果表明,等待模型包含了某些现有的软件/硬件模型.文中定义了等待率函数,并作了计算和分析,还对可用度、软件及硬件平均故障次数等七项指标进行了计算和分析.

关键词：计算机可靠性等待系统软件硬件

Co-production of hydrogen, oxygen, and electricity via an integrated solar-driven system with decoupled water electrolyzer and Na-Zn ion battery

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Journal of Energy Chemistry 2025年第1期100卷 621-627页

作者： Fei Lv Longjie Liu Jiazhe Wu pengfei Wang Lixia Pan Dengwei Jing Yubin Chen International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University

Combining water electrolysis and rechargeable battery technologies into a single system holds great promise for the co-production of hydrogen （H2） and ***,the design and development of such systems is still in its ***,an integrated hydrogen-oxygen （O2）-electricity co-production system featuring a bipolar membrane-assisted decoupled electrolyzer and a Na-Zn ion battery was established with sodium nickelhexacyanoferrate （NaNiHCF） and Zn2+/Zn as dual redox *** decoupled electrolyzer enables to produce H2and O2in different time and space with almost 100%Faradaic efficiency at 100 mA ***,the charged NaNiHCF and Zn electrodes after the electrolysis processes formed a Na-Zn ion battery,which can generate electricity with an average cell voltage of 1.75 V at 10 m A *** connecting Si photovoltaics with the modular electrochemical device,a well-matched solar driven system was built to convert the intermittent solar energy into hydrogen and electric energy with a solar to hydrogen-electricity efficiency of 16.7%,demonstrating the flexible storage and conversion of renewables.

关键词： Hydrogen Electricity Decoupled water electrolyzer Na-Zn ion battery Solar energy

A mild, configurable, flexible CoNi-LDH（v）/Zn battery based on H-vacancy-induced reversible Zn2+ intercalation

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Journal of Energy Chemistry 2025年第1期100卷 498-508页

作者： Xinyue Cheng Dingsheng Wu Hao Gao Qingqing Wang pengfei Lv Sam S.Yoon Qufu Wei Key Laboratory of Eco-textiles Ministry of Education Jiangnan University School of Mechanical Engineering Korea University

Flexible Zn-based batteries have attracted increasing research interest as essential components of wearable energy storage ***,the advancement of flexible aqueous Zn-based batteries based on Co-Ni layered double hydroxide （CoNi-LDH） as the cathode material is hampered by their poor cycling stability and the corrosiveness of alkaline ***,CoNi-LDH nanosheets enriched with H vacancies (CoNi-LDH（v）) were constructed on a flexible carbon cloth （CC） substrate via electrochemical deposition and *** Zn-based battery comprising CoNi-LDH（v）@CC as the cathode exhibited highly reversible conversion reactions and stable operation in 3 M ZnSO4electrolyte （pH=4）.The battery delivered an excellent specific capacity (225 mA h g-1,0.26 mA h cm-2),acceptable cycling stability（53.9%,900 cycles）,and high discharging *** abundant H vacancies served as active sites for the reversible intercalation of Zn2+and the extravasation of NO3-generated channels and space for Zn2+transport and storage,together enabling an excellent Zn2+storage ***,a sandwich-structured solid-state CoNi-LDH（v）@CC//Zn@CC battery was fabricated and was found to exhibit a noteworthy electrochemical performance and mechanical *** a proof of concept,the unencapsulated battery powered a digital watch under various deformation conditions and operated stably for 80 ***,the flexible battery displayed outstanding customizability,maintaining an open-circuit voltage of 1.42 V even after being cut *** proposed engineering strategy contributes to the realization of textiles with truly wearable energy-storage devices.

关键词： CoNi/Zn battery H vacancies Mild aqueous electrolyte Tailorable battery Wearable energy storage device

液压系统用异步电动机批生产工艺方案技术优化

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微电机 2023年第4期56卷 92-95页

作者：谭鹏飞兰州电机股份有限公司兰州730314

我公司生产配套的某车载液压系统用异步电动机在批生产阶段中存在的影响产品性能和成品合格率等因素,经过仔细深入排查分析,制定了解决影响产品质量的改进方案。通过一系列工艺技术优化,解决了批生产阶段电动机定子耐电压试验不合格、... 详细信息

我公司生产配套的某车载液压系统用异步电动机在批生产阶段中存在的影响产品性能和成品合格率等因素,经过仔细深入排查分析,制定了解决影响产品质量的改进方案。通过一系列工艺技术优化,解决了批生产阶段电动机定子耐电压试验不合格、温升超标、振动速度超标、空载电流偏大、零部件和成品一次交检合格率低等质量问题。并依照改进后的工艺方案,通过试制样机进行试验验证,认定所采取的措施是可行的,满足了产品批生产的工艺需求。

关键词：异步电动机批生产工艺方案技术优化