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Water-Driven Malleable,Weldable and Eco-Friendly Recyclable Carbon Fiber Reinforced Dynamic Composites

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Chinese Journal of Chemistry 2024年第5期42卷 516-522页

作者： Ping Yu Qirui Huang Yi wang wan peng Zichen Jia Haiyue wang Juanjuan Ma Chunyu wang Xuzhou Yan School of Environmental and Chemical Engineering Jiangsu Key Laboratory of Function Control Technology for Advanced MaterialsJiangsu Ocean UniversityLianyungangJiangsu222005 China School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesShanghai Jiao Tong UniversityShanghai200240 China

Traditional carbon fiber-reinforced polymers based on thermoset matrix have been extensively used in the fields of wind turbine blades,automotive sector,and aerospace,among many ***,there is still a major challenge of recycling those polymers due to the high cost and adverse impacts on the *** this work,we apply a polyimine network as matrix,which possess considerable tensile and thermal properties,to prepare the carbon fiber reinforced polyimine materials with trifluoromethyl diphenoxybenzene units(CFRFP)using a prepreg-based compression molding *** CFRFP can be reshaped or reprocessed by heat or with water rapidly,and exhibited multifunction,including welding,chemical recycling,*** unique findings gained from our study will facilitate the manufacturing capability and enrich the types of fiber-reinforced composites.

关键词： Dynamic chemistry Green chemistry Fiber-reinforced composites Fluoropolyimine Welding Reshaping Recycling Renewable resources

Upwelling current and its relationship to the enrichment of organic matter in the Lower Silurian Longmaxi Formation, northern Chongqing-western Hubei area, southern China

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Journal of Palaeogeography 2024年第4期13卷 993-1015页

作者： Jun-Jun Shen Jia-Kai Yan peng-wan wang Yu-Man wang Lin Zhou Yu-Bing Ji Min Xu Hubei Cooperative Innovation Center of Unconventional Oil and Gas of Yangtze University Hydrogeology and Engineering Geology Institute of Hubei Geological Bureau PetroChina Hangzhou Institute of Petroleum Geology PetroChina Research Institute of Petroleum Exploration and Development Exploration and Production Research Institute Zhejiang Oilfield Company Integrated Center of Exploration and Development

Upwelling currents play a crucial role in the enrichment of organic matter, yet the mechanisms driving this process remain incompletely understood due to methodological and data resolution limitations. In this paper, we employ a combination of biostratigraphic classification, qualitative methods, and quantitative methods to systematically analyze the sedimentological and geochemical characteristics of the Lower Silurian Longmaxi Formation in the northern Chongqing-western Hubei area, southern China. The relationship between the upwelling currents and organic matter enrichment in the shale of the Longmaxi Formation is investigated. Results indicate that the upwelling currents in the study area were primarily influenced by the foreland flexure process. From the Rhuddanian(flexure-sedimentation stage) to the Aeronian(flexure-migration stage), the more intense tectonic activity led to gradual opening of the barrier between the South Qinling Ocean and the Yangtze Platform, resulting in an increase in the influx of the oceanic current. The upwelling currents significantly contributed to the organic matter production, albeit without substantially affecting the preservation conditions. Throughout the succession of the Longmaxi Formation, the organic matter content decreased gradually from the passive continental margin to the foreland flexural stagnant basin, which was mainly due to deterioration of the preservation conditions as a result of sea level fall and increased terrigenous input. Despite the increase in the upwelling currents, they did not decisively control the organic matter enrichment. Spatially, during the Rhuddanian to Aeronian period, the organic matter content decreased similarly from the passive continental margin to the foreland flexural stagnant basin, influenced by reduced organic matter production caused by weakening of the upwelling currents and the worsening preservation conditions caused by sea-level fall. The terrigenous input had a relatively minor

关键词： Middle–Upper Yangtze Ordovician–Silurian transition Black shale Passive continental margin Foreland flexural stagnant basin Sedimentary paleoenvironment

High-performance,low-power,and flexible ultraviolet photodetector based on crossed ZnO microwires p-n homojunction

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Photonics Research 2024年第4期12卷 648-662页

作者： SHULIN SHA KAI TANG MAOSHENG LIU peng wan CHENYANG ZHU DANING SHI CAIXIA KAN MINGMING JIANG College of Physics MIIT Key Laboratory of Aerospace Information Materials and PhysicsKey Laboratory for Intelligent Nano Materials and DevicesNanjing University of Aeronautics and AstronauticsNanjing 211106China

Low-power, flexible, and integrated photodetectors have attracted increasing attention due to their potential applications of photosensing, astronomy, communications, wearable electronics, etc. Herein, the samples of ZnO microwires having p-type(Sb-doped ZnO, ZnO:Sb) and n-type(Ga-doped ZnO, ZnO:Ga) conduction properties were synthesized individually. Sequentially, a p-n homojunction vertical structure photodiode involving a single ZnO:Sb microwire crossed with a ZnO:Ga microwire, which can detect ultraviolet light signals, was constructed.

关键词： power ultraviolet conduction

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Research Progress of Detection Methods for Microplastics

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Asian Agricultural Research 2024年第3期16卷 29-32页

作者： peng wan Zhen ZHAO Guoyan WEN Yunshuang FU Cuizhi LI Xiaoli WU Inner Mongolia Yili Industrial Group Co. Ltd.Hohhot 010010China

Microplastics are plastic particles or fibers with a diameter of less than 5 mm,and they widely exist in the environment and pose potential risks to the ecosystem and human *** detection can provide basic data for formulating effective environmental protection *** this paper,the physical,chemical and biological detection methods of microplastics are reviewed,and the advantages and disadvantages of different methods are *** problems and challenges encountered in microplastics detection are analyzed,and the future research is discussed.

关键词： Microplastics Detection method Research progress

Research Progress of Microplastics Pollution in Environment

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Asian Agricultural Research 2024年第4期16卷 19-22页

作者： peng wan Zhen ZHAO Guoyan WEN Yunshuang FU Cuizhi LI Xiaoli WU Inner Mongolia Yili Industrial Group Co. Ltd.Hohhot 010010China

Microplastics pollution has become one of the focuses of global environmental science *** include micro plastic particles and nano-plastic particles,which come from the decomposition of plastic products,the release of microfibers and the industrial process of plastic *** distribution of microplastics in water,soil and atmosphere is summarized,and the widespread existence of microplastics in different environmental media is *** paper also summarizes the potential impact of microplastics on ecosystems and organisms,and pays attention to the transmission and accumulation of microplastics in the food chain,as well as its potential threat to human ***,the paper discusses the methods and technologies of microplastics treatment and monitoring at present,and puts forward the direction of further research on microplastics pollution in order to formulate more effective management and mitigation strategies.

关键词： Microplastics Environment Pollution

Advances in Research of Collection and Detection Methods of Microplastics in Environment

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Asian Agricultural Research 2024年第9期16卷 23-27,31页

作者： Yunshuang FU Zhen ZHAO peng wan Guoyan WEN Haibo FAN Cuizhi LI Zhiyong LU National Center of Technology Innovation for Dairy Hohhot 010080China Inner Mongolia Yili Industrial Group Co. Ltd.Hohhot 010010China

As a new type of environmental pollutants,microplastics have gradually attracted people s attention.A large number of plastics discharged into the environment by human beings are constantly aging and breaking,and finally become *** can adsorb pollutants in the environment,and their components have certain toxicity,which can cause different degrees of harm to *** to the structural characteristics of microplastic particles,such as small particle size,large specific surface area,and their distribution in different environmental media,it is very difficult to accurately detect *** collection and detection methods are the key to the study of environmental behavior of *** this study,the collection and detection methods of microplastics in the environment were reviewed,and the development direction of microplastics detection technology in the future was *** study has a certain reference value for the related research and the prevention and treatment of micro-plastic pollution.

关键词： Microplastics Collection method Detection method

Characteristics and genesis of groundwater salinization in coastal areas of the Lower Reaches of Oujiang Basin

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Journal of Groundwater Science and Engineering 2024年第2期12卷 190-204页

作者： Mei-hui Zhang Shi-yang Zhou Dan-dan Liu Ying Zhang Yu-xi Zhang Xi Chen Hui-wei wang Bei Li Wei Kang Bing Yi wan-peng Shi Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological SciencesShijiazhuang 050061China Fujian Provincial Key Laboratory of Water Cycling and Eco–Geological Processes Xiamen 361021FujianChina China University of Geosciences(Beijing) Beijing 100083China Changsha Center of Natural Resources Comprehensive Survey China Geological SurveyChangsha 410600China Hydrogeological Environmental Geological Survey Center of China Geological Survey Tianjin 071501China China University of Geosciences Wuhan 430074China

The coastal areas of the lower reaches of Oujiang River Basin are rich in groundwater ***,the unsustainable exploitation and utilization of groundwater have led to significant changes in the groundwater *** the characteristics and genesis of groundwater salinization is crucial for preventing its deterioration and ensuring sustainable *** this study,a comprehensive approach combining the ion ratio method,mineral saturation index method and multivariate statistical analysis was employed to investigate the hydrochemical characteristics and main controlling factors in the study *** findings reveal that:(1)Groundwater samples in study area exhibit a neutral to slightly alkaline *** predominant chemical types of unconfined water are HCO_(3)-Ca·Na,HCO_(3)·Cl-Na·Ca and HCO_(3)·SO_(4)-Ca·Na,while confined water mainly exhibits Cl·HCO_(3)-Na and Cl-Na types.(2)Salinity coefficients indicate an increase in salinity from unconfined to confined ***,Na^(+)and Cl^(–)concentrations show an increasing trend from mountainous to coastal areas in unconfined water,while confined water displays variability in TDS,Na^(+)and Cl^(–)concentrations.(3)Groundwater salinity is mainly influenced by water-rock interactions,including the dissolution of halite and gypsum,cation exchange,and seawater intrusion ***,human activities and carbonate dissolution contribute to salinity in unconfined *** intrusion is identified as the primary factor leading to higher salinity in confined water compared to unconfined water,with increasing cation exchange and seawater interaction observed from unconfined to confined water.

关键词： Hydrochemical Multivariate statistical analysis Seawater intrusion

Programmed cell death 1 inhibitor sintilimab plus concurrent chemoradiotherapy for locally advanced pancreatic adenocarcinoma

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World Journal of Clinical Oncology 2024年第7期15卷 859-866页

作者： Shi-Qiong Zhou peng wan Sen Zhang Yuan Ren Hong-Tao Li Qing-Hua Ke Department of Chemoradiotherapy The First Affiliated Hospital of Yangtze UniversityJingzhou 434000Hubei ProvinceChina

BACKGROUND Pancreatic adenocarcinoma,a malignancy that arises in the cells of the pancreas,is a devastating disease with unclear etiology and often poor *** advanced pancreatic cancer,a stage where the tumor has grown significantly but has not yet spread to distant organs,presents unique challenges in *** article aims to discuss the current strategies,challenges,and future directions in the management of locally advanced pancreatic adenocarcinoma(LAPC).AIM To investigate the feasibility and efficacy of programmed cell death 1(PD-1)inhibitor sintilimab plus concurrent chemoradiotherapy for *** Eligible patients had LAPC,an Eastern cooperative oncology group performance status of 0 or 1,adequate organ and marrow functions,and no prior anticancer *** the observation group,participants received intravenous sintilimab 200 mg once every 3 wk,and received concurrent chemoradiotherapy(concurrent conventional fractionated radiotherapy with doses planning target volume 50.4 Gy and gross tumor volume 60 Gy in 28 fractions and oral S-140 mg/m2 twice daily on days 1-14 of a 21-d cycle and intravenous gemcitabine 1000 mg/m2 on days 1 and 8 of a 21-d cycle for eight cycles until disease progression,death,or unacceptable toxicity).In the control group,participants only received concurrent *** April 2020 to November 2021,64 participants were finally enrolled with 34 in the observation group and 30 in the control *** Thirty-four patients completed the scheduled course of chemoradiotherapy,while 32(94.1%)received sintilimab plus concurrent chemoradiotherapy with 2 patients discontinuing sintilimab in the observation *** patients completed the scheduled course of chemoradiotherapy in the control *** on the Response Evaluation Criteria in Solid Tumors guidelines,the analysis of the observation group revealed that a partial response was observed in 11 patients(32.4%),stable disease was evident in 19 pa

关键词： Immunotherapy Concurrent chemoradiotherapy Locally advanced pancreatic adenocarcinoma Programmed cell death 1 Sintilimab

A highly linear stretchable MXene-based biocompatible hydrogel-elastomer hybrid with tissue-level softness

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Science China Materials 2024年第10期67卷 3368-3378页

作者： Shu wan Haizhou Huang Zisheng He Yizhou Ye Shen Li Shi Su Jiaxin Shen Longxiang Han peng wan Xu Ran Li Chen Xuefeng He Litao Sun Hengchang Bi Key Laboratory of Optoelectronic Technology and Systems Ministry of EducationKey Disciplines Laboratory of Novel Micro-Nano Devices and System TechnologySchool of Optoelectronics EngineeringChongqing UniversityChongqing 400044China College of Photonic and Electronic Engineering Fujian Normal UniversityFuzhou 350117China School of Aeronautical Engineering Nanjing Vocational University of Industry TechnologyNanjing 210023China SEU-FEI Nano-Pico Center Key Laboratory of MEMS of Ministry of EducationCollaborative Innovation Center for Micro/Nano FabricationDevice and SystemSoutheast UniversityNanjing 210096China The Shanghai Key Laboratory of Multidimensional Information Processing School of Communication and Electronic EngineeringEast China Normal UniversityShanghai 200241China

Maintaining low modulus while endowing the wide-range linear stretchability to wearable or implantable devices is crucial for these devices to reduce the mechanical mismatch between the devices and human skin/tissue ***,improving linear stretchability often results in an increased modulus of stretchable electronic materials,which hinders their conformability in long-term quantifiable monitoring of ***,we develop a hybrid structure involving interlocking low-modulus porous elastomers(Ecoflex-0030)and MXene-based hydrogels with crosslinking networks of polyvinyl alcohol,sodium alginate,and *** hydrogel–elastomer structure exhibits superior performance compared with previous reports,with a wide linear stretchability strain range from 0 to 1000%and maintaining a low modulus of 6.4 ***,the hydrogel–elastomer hybrids can be utilized as highly sensitive strain sensors with remarkable characteristics,including high sensitivity(gauge factor~3.52),a linear correlation between the resistance and strain(0–200%),rapid response(0.18 s)and recovery times(0.21 s),and excellent electrical reproducibility(1000 loading–unloading cycles).Those electrical and mechanical properties allow the sensor to act as a suitable quantifiable equipment in organ monitoring,human activities detecting,and human–machine interactions.

关键词： linear stretchability low modulus MXene hydrogel-elastomer hybrid

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