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COALESCENCE INDUCED GRADIENT MORPHOLOGY NEAR A WALL IN PHASE SEPARATED POLYMER BLENDS DURING QUIESCENT ANNEALING

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chinese Journal of Polymer Science 2002年第6期20卷 543-550页

作者： Wei yu Chi-xing Zhou De-lu zhao Department of Polymer Science and engineering, Shanghai Jiao Tong University, Shanghai 200240 {3. state key laboratory of Polymer Physics and chemistry, institute of chemistry, chinese Academy of sciences beijing {13., {3. Shanghai Jiao Tong Univ Dept Polymer Sci & Engn Shanghai 200240 Peoples R China chinese Acad Sci Inst Chem State Key Lab Polymer Phys & Chem Beijing 100080 Peoples R China

A fast coalescence mechanism is proposed to account for the wall effect on the formation of gradient morphology in phase separated polymer blends during quiescent annealing. The existence of solid wall with high polarity is believed to change the potential field around the dispersed particles near the wall. This additional potential interaction between the solid wall and the dispersed particles causes faster coalescence of the dispersed particles near the wall than in the bulk. The gradient phase morphology thus formed can be predicted by combining the wall-particle interaction and the touch-coalescence mechanism. The effect of interfacial tension on the gradient morphology is also discussed.

关键词： gradient morphology wall effect coalescence polymer blends interfacial tension

Electrochemical reconstruction of non-noble metal-based heterostructure nanorod arrays electrodes for highly stable anion exchange membrane seawater electrolysis

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Journal of Energy chemistry 2024年第4期91卷 370-382页

作者： Jingchen Na Hongmei yu Senyuan Jia Jun Chi Kaiqiu Lv Tongzhou Li yun {3. yutong {3. Haitao Zhang Zhigang Shao Fuel Cell System and engineering laboratory Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of chinese Academy of sciences Beijing 100049China

Direct seawater electrolysis for hydrogen production has been regarded as a viable route to utilize surplus renewable energy and address the climate ***,the harsh electrochemical environment of seawater,particularly the presence of aggressive Cl^(-),has been proven to be prone to parasitic chloride ion oxidation and corrosion reactions,thus restricting seawater electrolyzer ***,hierarchical structure(Ni,Fe)O(OH)@NiCoS nanorod arrays(NAs)catalysts with heterointerfaces and localized oxygen vacancies were synthesized at nickel foam substrates via the combination of hydrothermal and annealing methods to boost seawater *** hiera rchical nanostructure of NiCoS NAs enhanced electrode charge transfer rate and active surface area to accelerate oxygen evolution reaction(OER)and generated sulfate gradient layers to repulsive aggressive Cl^(-).The fabricated heterostructure and vacancies of(Ni,Fe)O(OH)tuned catalyst electronic structure into an electrophilic state to enhance the binding affinity of hydroxyl intermediates and facilitate the structural transformation into amorphousγ-NiFeOOH for promoting ***,through operando electrochemistry techniques,we found that theγ-NiFeOOH possessing an unsaturated coordination environment and lattice-oxygen-participated OER mechanism can minimize electrode Cl^(-)corrosion enabled by stabilizing the adsorption of OH*intermediates,making it one of the best OER catalysts in the seawater medium reported to ***,these catalysts can deliver current densities of 100 and 500 mA cm-2for boosting OER at minimal overpotentials of 245and 3.6 mV,respectively,and thus prevent chloride ion oxidation ***,a highly stable anion exchange membrane(AEM)seawater electrolyzer based on the non-noble metal heterostructure electrodes reached a record low degradation rate under 100μV h-1at constant industrial current densities of 400 and 600 mA cm-2over 3.0 h,which exhibits a promi

关键词： Direct seawater electrolysis Anion exchange membrane water electrolysis Oxygen evolution reaction Oxygen vacancies Operando electrochemistry techniques

Dual-functional microneedle with programmatic regulation of macrophage for autoimmune psoriasis treatment

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Nano Research 2024年第8期17卷 7436-7448页

作者： Ze Qiang zhao Bo Zhi Chen Jia Li Gan yun Hao Feng Ling Liang Lingyun {3. Zi Yi Wang Samin Abbaszadeh Mohammad-Ali Shahbazi Ruixing {3. Xin Dong Guo state key laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China beijing laboratory of Biomedical Materials College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China china-Japan Friendship Hospital Chinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100029China Department of Dermatology China-Japan Friendship HospitalBeijing 100029China Department of Pharmaceutical Biomaterials School of PharmacyZanjan University of Medical SciencesZanjan 45139-56184Iran Department of Biomaterials and Biomedical Technology University Medical Center GroningenUniversity of GroningenAntonius Deusinglaan 19713 AV GroningenThe Netherlands W.J.Kolff institute for Biomedical engineering and Materials Science University of GroningenAntonius Deusinglaan 19713 AV GroningenThe Netherlands

Modulating the immune microenvironment to establish sustained positive feedback within immune pathways represents a promising avenue for the treatment of ***,the precise and efficient delivery of therapeutic systems to the subcutaneous basal layer to modulate immune disorders is a major challenge in the treatment of autoimmune *** this project,we introduce a dual-functional microneedle(DF-MN)designed to combine MNs with multiple release kinetics and immunotherapy,the programmed treatment is achieved through segmented design of the MN structure,realizing the unification of rapid and long-lasting treatment of autoimmune *** vivo imaging results showed that GelMA@M-CSF showed fluorescent signals after 5 days of delivery to subcutaneous tissues,whereas HA@IL-13.showed minimal fluorescent signals after 2 *** multistage release behavior of MNs and the diffusion mechanism of drugs were explained at the molecular level,in combination with coarse-grained molecular ***,DF-MN can successfully induce macrophage reprogramming in vitro and ameliorate overall symptoms in a psoriasis mice model,suggesting that it has the potential to be an effective strategy for the treatment of psoriasis and portends to be a transformative platform for the treatment of other autoimmune diseases.

关键词： microneedle psoriasis M2 macrophage immunoregulation

Source apportionment and specific-source-site risk of quinolone antibiotics for effluent-receiving urban rivers and groundwater in a city, china

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Journal of Environmental sciences 2024年第10期144卷 185-198页

作者： yu zhao yuanmeng Song Lulu Zhang Bo zhao Mengqi Lu Jiansheng Cui Wenzhong Tang state key laboratory of Environmental Aquatic {3. Research Center for Eco-Environmental SciencesChinese Academy of ScienceBeijing 100085China College of Environment Science and engineering Hebei University of Science and TechnologyShijiazhuang 050000China University of chinese Academy of sciences Beijing 100049China

There is a large surface-groundwater exchange downstream ofwastewater treatment plants(WWTPs),and antibiotics upstream may influence sites downstream of ***,samples from 9 effluent-receiving urban rivers(ERURs)and 12 groundwater sites were collected in Shijiazhuang City in December 2020 and April *** ERURs,8 out of 13.target quinolone antibiotics(QNs)were detected,and the total concentration of QNs in December and April were 100.6-4,3.8 ng/L and 8.02–2,476 ng/L,*** groundwater,all target QNs were detected,and the total QNs concentration was 1.09–23.03.ng/L for December and 4.54–170.3.ng/L for *** distribution of QNs was dissimilar between ERURs and *** QN concentrations were weakly correlated with land use types in the *** results of a positive matrix factorization model(PMF)indicated four potential sources of QNs in both ERURs and groundwater,and WWTP effluents were the main source of *** December to April,the contribution of WWTP effluents and agricultural emissions increased,while livestock activities *** value decomposition(SVD)results showed that the spatial variation of most QNs was mainly contributed by sites downstream(7.09%-88.86%)of ***,a new method that combined the results of SVD and PMF was developed for a specific-source-site risk quotient(SRQ),and the SRQ for QNs was at high level,especially for the sites downstream of *** temporal variation,the SRQ for WWTP effluents,aquaculture,and agricultural emissions ***,in order to control the antibiotic pollution,more attention should be paid to WWTP effluents,aquaculture,and agricultural emission sources for the benefit of sites downstream of WWTPs.

关键词： Source apportionment Singular value decomposition Positive matrix factorization model Quinolone antibiotics(QNs) Specific-source-site risk quotient(SRQ) WWTP effluents

Simplified p-i-n Perovskite Solar Cells with a Multifunctional Polyfullerene Electron Transporter

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chinese Journal of Polymer Science 2024年第8期42卷 1060-1066页

作者： Fei-Fei Wang Tian-Xiao Liu Ze-Wei Cui Ling-yuan Wang yun-Jie Dou Xiao-yu Shi Si-Wei Luo Xiao-Dong Hu Zhi-Jun Ren Yang-Yang Liu yu zhao Shang-Shang Chen state key laboratory of Coordination {3. MOE Key Laboratory of High Performance Polymer Materials&TechnologySchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 21003China

In prevailing p-i-n perovskite solar cells(PSCs),solution-processible fullerene molecules are widely used as electron-transporting layers(ETLs)but they typically suffer from poor uniformity and undesirable stability ***,a separate bathocuproine(BCP)layer is needed to block hole tran sfer,increasing fabrication complexity and ***,we address these limitations by develo ping a novel polymeric ETL(named PF BCP)synthesized by polymerizing C_(60)with *** innovative material achieves both efficient electron transport and hole blocking,while its excellent uniformity minimizes interface recombination and enhances ***,our blade-coated PSCs utilizing PFBCP achieve a high power conversion efficiency exceeding 22%and retain 91%of initial efficiency after 1200 h of light *** development not only paves the way for commercially viable PSCs but also opens avenues for future ETL design to realize even more efficient and stable PSCs.

关键词： Polyfullerene Perovskite solar cells Electron transporter Stability

Natural products inspired[3.2]cycloaddition enables efficient construction of hydroxylated tetrahydrofuran acetals and concise syntheses of lignans

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Science china chemistry 2024年第7期67卷 2306-2313页

作者： Dong-yue Cai Weiming Shi zhao-Hui Jin Zhi-Xiang yu Jin-Xin zhao Jian-Min yue state key laboratory of Drug Research Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China University of chinese Academy of sciences Beijing 100049China beijing National laboratory for Molecular sciences(BNLMS) Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of ChemistryPeking UniversityBeijing 100871China

Mimicking biosynthetic pathways of hongkonoids led to the development of a new Cu(Ⅰ)-catalyzed[3.2]cycloaddition ofα-hydroxyketone andβ-keto enol ethers,affording tetrahydrofuran acetals in a highly diastereoselective manner and 100%atom *** studies on the mechanism disclosed a concerted but asynchronous Michael addition/aldol *** the same importance,this methodology provides a practical biomimetic approach for one-step construction of the dibenzylbutyrolactol lignan backbone starting from two phenyl propane derivatives,opening up a powerful new approach for lignan synthesis,which is showcased by succinct total syntheses of two biologically important aryltetralin-type lignans,β-apopicropodophyllin and *** the mild and operationally simple conditions,the developed chemistry might have a promising prospect in potential industrial applications.

关键词： [3.2]cycloaddition transition-metal catalysis tetrahydrofuran lignans natural products

Time-resolved ultra-small-angle X-ray scattering beamline(BL10U1)at SSRF

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Nuclear Science and Techniques 2024年第2期35卷 6-19页

作者： Wen-Qiang Hua Chun-Ming Yang Ping Zhou Feng Tian Jin-You Lin yu-Zhu Wang Xiao-yun Li Xia-Ran Miao Chun-Xia Hong Qiu-Shi Huang Xin-Tong zhao Yong-Feng Men Jie Wang Xing-yu Gao Xiu-Hong Li Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China key laboratory of Advanced Micro Structural Materials MOEInstitute of Precision Optical EngineeringSchool of Physics Science and EngineeringTongji UniversityShanghai 200092China state key laboratory of Polymer Physics and {3. Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China

The construction of a new beamline,BL10U1,was completed at the Shanghai synchrotron radiation facility in *** multipurpose beamline was designed to provide X-ray scattering techniques such as ultra-small-angle X-ray scattering(USAXS),small-angle X-ray scattering(SAXS),wide-angle X-ray scattering,and microfocus SAXS(μSAXS)for a broad user *** realize fast time-resolved USAXS experiments,the beamline adopted an in-vacuum undulator with a total length of 1.6 m as the photon *** in-house cryogenic-cooled double multilayer monochromator was installed to deliver a photon flux of approximately 10^(13. photons/s at a photon energy of 10 *** three-year successful operation of this beamline demonstrated that the monochromator operated smoothly,as ***10U1 has three end stations in succession:USAXS end station,μSAXS end station,and end station for industrial *** minimum scattering vector q~0.0042 nm^(-1) at 10 keV can be achieved at the USAXS end station equipped with a 28 m-long and 1.8 m-diameter vacuum flight *** theμSAXS end station,a beam spot of less than 10×8μm was achieved for micro-SAXS *** contrast,in situ experimental instruments up to 5 m high and 8 m wide can be mounted at the industrial application end station,which offers industrial scientists the opportunity to use their large industrial ***10U1 opens up a new capability to investigate phenomena such as non-equilibrium and dynamic processes of materials with a wide length scale from angstroms to micrometers with millisecond time *** this paper,we also report beamline design considerations and commissioning results.

关键词： Synchrotron radiation Ultra-small-angle X-ray scattering Micro small-angle X-ray scattering USAXS Time resolved μSAXS

Roadmap for rechargeable batteries:present and beyond

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Science china chemistry 2024年第1期67卷 13-42页

作者： Sen Xin Xu Zhang Lin Wang Haijun yu Xin Chang yu-Ming zhao Qinghai Meng Pan Xu Chen-Zi zhao Jiahang Chen Huichao Lu Xirui Kong Jiulin Wang Kai Chen Gang Huang Xinbo Zhang yu Su Yao Xiao Shu-Lei Chou Shilin Zhang Zaiping Guo Aobing Du Guanglei Cui Gaojing Yang Qing zhao Liubing Dong Dong Zhou Feiyu Kang Hu Hong Chunyi Zhi Zhizhang yuan Xianfeng Li Yifei Mo Yizhou Zhu Dongfang yu Xincheng Lei Jianxiong zhao Jiayi Wang Dong Su yu-Guo Guo Qiang Zhang Jun Chen Li-Jun Wan CAS key laboratory of Molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular SciencesBeijing National Laboratory for Molecular Sciences(BNLMS)Institute of ChemistryChinese Academy of Sciences(CAS)Beijing 100190China University of chinese Academy of sciences.beijing 100049 China institute of Advanced Battery Materials and Devices Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China key laboratory of Advanced Functional Materials Ministry of EducationBeijing University of TechnologyBeijing 100124China beijing key laboratory of Green Chemical Reaction {3. and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China state key laboratory of {3. and Utilization of Carbon-Based Energy Resources College of ChemistryXinjiang UniversityUrumqi 830046China Department of Chemical engineering Shanghai Jiao Tong UniversityShanghai 200240China state key laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChangchun 130022China institute for Carbon Neutralization College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035China School of Chemical engineering and Advanced Materials The University of AdelaideAdelaide 5000Australia Qingdao Industrial Energy Storage Research institute Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China Frontiers Science Center for New Organic Matter Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education)College of ChemistryNankai UniversityTianjin 300071China College of chemistry and Materials Science Jinan UniversityGuangzhou 511443China Tsinghua Shenzhen International Graduate School Tsinghua UniversityShenzhen 518055China Department of Materials Science and engineering City University of Hong KongHong Kong 999077China Division of Energy Storage Dalian National Laboratory for Clean Energy(DNL)Dalian Institute of Chem

Rechargeable batteries currently hold the largest share of the electrochemical energy storage market,and they play a major role in the sustainable energy transition and industrial decarbonization to respond to global climate *** to the increased popularity of consumer electronics and electric vehicles,lithium-ion batteries have quickly become the most successful rechargeable batteries in the past three decades,yet growing demands in diversified application scenarios call for new types of rechargeable *** efforts are made to developing the next-generation post-Li-ion rechargeable batteries,which include,but are not limited to solid-state batteries,lithium–sulfur batteries,sodium-/potassium-ion batteries,organic batteries,magnesium-/zinc-ion batteries,aqueous batteries and flow *** the great achievements,challenges persist in precise understandings about the electrochemical reaction and charge transfer process,and optimal design of key materials and interfaces in a *** roadmap tends to provide an overview about the current research progress,key challenges and future prospects of various types of rechargeable *** computational methods for materials development,and characterization techniques will also be discussed as they play an important role in battery research.

关键词： energy storage rechargeable batteries battery materials electrochemistry

Nickel phosphorous trisulfide:A ternary 2D material with an ultra-low coefficient of friction

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Friction 2024年第10期12卷 2313-2324,F0004页

作者： Haoyu DENG Tongtong yu Changhe DU Ruilin SHEN Yongkang zhao Xinjian HE Yange FENG Liqiang ZHANG Daoai WANG state key laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of Materials Science and Optoelectronics engineering University of Chinese Academy of SciencesBeijing 100049China Qingdao Center of Resource chemistry and New Materials Qingdao 266100China Shandong laboratory of Yantai Advanced Materials and Green Manufacturing Yantai 265503China

Ultra-low friction is crucial for the anti-friction,anti-wear,and long-life operation of ***,very few two-dimensional materials can achieve ultra-low friction,and they have some limitations in their ***,exploring novel materials with ultra-low friction properties is greatly *** emergence of ternary two-dimensional materials has opened new opportunities for nanoscale ultra-low *** study introduced nickel phosphorous trisulfide(NiPS3.referred to as NPS),a novel two-dimensional ternary material capable of achieving ultralow friction in a vacuum,into the large nanotribology ***-size and high-quality NPS crystals with up to 14 mm×6 mm×0.3.mm dimensions were grown using the chemical vapor transport *** NPS nanosheets were obtained using mechanical *** dependence of the NPS nanotribology on layer,velocity,and angle was systematically investigated using lateral force ***,the coefficient of friction(COF)of NPS with multilayers was decreased to about 0.0045 under 0.005 Pa vacuum condition(with load up to 767.8 nN),achieving the ultra-low friction *** analysis of the frictional dissipation energy and adhesive forces showed that NPS with multilayers had minimum frictional dissipation energy and adhesive forces since the interlayer interactions were weak and the meniscus force was excluded under vacuum *** study on the nanoscale friction of a ternary two-dimensional material lays a foundation for exploring the nanoscale friction and friction origin of other two-dimensional materials in the future.

关键词： two-dimensional(2D)materials NiPS3 ultra-low friction nanotribology