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Tribological and anti-corrosion performance of epoxy resin composite coatings reinforced with differently sized cubic boron nitride(CBN)particles

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Friction 2021年第1期9卷 104-118页

作者： Zhiping HUANG Wenjie zhao wenchao zhao Xiaojing CI Wentao LI Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China University of Chinese Academy of Sciences Beijing 100049China

A series of high solid content(30 wt%)epoxy resin(EP)composite coatings reinforced with differently sized cubic boron nitride(CBN)particles were fabricated successfully on 304 L stainless ***(PDA)was used to improve the dispersibility of CBN particles in *** structural and morphological features of the CBN particles and the composite coatings were characterized by Raman spectroscopy,scanning electron microscopy(SEM),and transmission electron microscopy(TEM).Moreover,a UMT-3 tribometer and surface profiler were used to investigate the tribological behaviors of the as-prepared composite *** impedance spectroscopy(EIS)and Tafel analysis were used to investigate the coatings'anti-corrosion *** results demonstrated that the CBN fillers could effectively enhance the tribological and anti-corrosion properties of the EP composite *** addition,when the additive proportion of the microsized(5μm)and nanosized(550 nm)CBN particles was 1:1,the tribological property of the EP composite coatings was optimal for dry sliding,which was attributed to the load carrying capability of the microsized CBN particles and the toughening effect of the nanosized CBN ***,when the additive proportion of the microsized and nanosized CBN particles was 2:1,the tribology and corrosion resistance performance were optimal in seawater *** ascribed this to the load-carrying capacity of the microparticles,which played a more important role under the seawater lubrication condition,and the more compact structure,which improved the electrolyte barrier ability for the composite coatings.

关键词： epoxy resin cubic boron nitride size composite coating wear resistance anti-corrosion

An Environment‑Tolerant Ion‑Conducting Double‑Network Composite Hydrogel for High‑Performance Flexible Electronic Devices

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Nano-Micro Letters 2024年第5期16卷 352-369页

作者： wenchao zhao Haifeng Zhou Wenkang Li Manlin Chen Min Zhou Long zhao State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074People’s Republic of China School of Chemistry and Chemical Engineering Huazhong University of Science and TechnologyWuhan 430074People’s Republic of China

High-performance ion-conducting hydrogels(ICHs)are vital for developing flexible electronic ***,the robustness and ion-conducting behavior of ICHs deteriorate at extreme tempera-tures,hampering their use in soft *** resolve these issues,a method involving freeze–thawing and ionizing radiation technology is reported herein for synthesizing a novel double-network(DN)ICH based on a poly(ionic liquid)/MXene/poly(vinyl alcohol)(PMP DN ICH)*** well-designed ICH exhibits outstanding ionic conductivity(63.89 mS cm^(-1) at 25℃),excellent temperature resistance(-60–80℃),prolonged stability(30 d at ambient temperature),high oxidation resist-ance,remarkable antibacterial activity,decent mechanical performance,and ***,the ICH performs effectively in a flexible wireless strain sensor,thermal sensor,all-solid-state supercapacitor,and single-electrode triboelectric nanogenerator,thereby highlighting its viability in constructing soft electronic *** highly integrated gel structure endows these flexible electronic devices with stable,reliable signal output *** particular,the all-solid-state supercapacitor containing the PMP DN ICH electrolyte exhibits a high areal specific capacitance of 253.38 mF cm^(-2)(current density,1 mA cm^(-2))and excellent environmental *** study paves the way for the design and fabrication of high-performance mul-tifunctional/flexible ICHs for wearable sensing,energy-storage,and energy-harvesting applications.

关键词： Ionic liquids Double-network hydrogels Temperature tolerance Multifunctionality Flexible electronic devices

Realizing over 10% efficiency in polymer solar cell by device optimization

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Science China Chemistry 2015年第2期58卷 248-256页

作者： Shaoqing Zhang Long Ye wenchao zhao Bei Yang Qi Wang Jianhui Hou State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular Sciences Institute of ChemistryChinese Academy of Sciences University of Science and Technology Beijing School of Chemistry and Biology Engineering

The low band gap polymer based on benzodithiophene(BDT)-thieno[3,4-b]thiophene(TT)backbone,PBDT-TS1,was synthesized following our previous work and the bulk heterojunction(BHJ)material comprising PBDT-TS1/PC71BM was optimized and *** processing the active layer with different additives i.e.1,8-diiodooctane(DIO),1-chloronaphthalene(CN)and 1,8-octanedithiol(ODT)and optimizing the ratio of each additive in the host solvent,a high PCE of 9.98%was obtained under the condition of utilizing 3%DIO as processing additive in *** effect of varied additives on photovoltaic performance was illustrated with atomic force microscopy(AFM)and transmission electron microscope(TEM)measurements that explained changes in photovoltaic *** results provide valuable information of solvent additive choice in device optimization of PBDTTT polymers,and the systematic device optimization could be applied in other efficient photovoltaic ***,this work presents a great advance in single junction PSCs,especially in PSCs with conventional architecture.

关键词： polymer solar cells photovoltaic polymer device optimization solvent additives

The Key Role of Subtle Substitution for a High-Performance Ester-Modified Oligothiophene-Based Polymer Used in Photovoltaic Cells

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Chinese Journal of Chemistry 2022年第24期40卷 2867-2874页

作者： Sunsun Li Yuan Ding Lei Xu wenchao zhao Jianqi Zhang Jinzhao Qin Yuyang Zhang Jingjing zhao Chang He Qiming Peng Jianhui Hou Key Laboratory of Flexible Electronics(KLOFE)and Institute of Advanced Materials(IAM) Nanjing Tech University(NanjingTech)NanjingJiangsu211816 China Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjingJiangsu210037 China State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing100190 China Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and TechnologyBeijing100190 China Jiangsu Seenbom Flexible Electronics Institute Co.Ltd NanjingJiangsu210043 China

In organic solar cells (OSCs), developing high-performing easily synthesized photoactive materials is essential for pursuing cost- effective balance. Herein, we have designed and synthesized a pair of wide-band-gap polymers (PBDE4T-0F and PBDE4T-2F), using the low synthesis cost dicarboxylic ester-substituted quaterthiophene as the building block. Despite the minor change of molecular structure for polymer PBDE4T-xF, the fluorine substituent in polymer PBDE4T-2F greatly enhances its interchain aggregation. The higher aggregation tendency of ester-modified polymer in solution is beneficial for reducing both the aggregate size and π-π stacking distance of blend film, which contribute to the highly efficient exciton dissociation and symmetric charge transport. An impressive power-conversion efficiency (PCE) of 16.1% is achieved for the PBDE4T-2F:BTP-eC9-based device, while its counterpart only delivers a PCE of 5.8% with distinctly lower short-circuit current density (J_(sc)) and fill factor. Notably, the aggregation effect of donor polymer has also been found to be associated with the energy level shifts, and thus the variation of charge transfer energy and voltage losses for blend system. The results suggest that simultaneously reduced voltage loss and increased J_(sc) can be expected by further finely tuning the aggregation behavior of the ester-modified oligothiophene-based donor polymer.

关键词： Organic solar cells Polymers Ester-modified oligothiophene Fluorine Aggregation

Oncolytic adenovirus targeting LASP-1 inhibited renal cell cancerprogression

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BIOCELL 2020年第4期44卷 639-647页

作者： FANGHAO SUN wenchao zhao LIANSHENG ZHANG HONGGUI MA JIAN ZHOU YOUGAN CHEN JIANQUAN HOU Department of Urology The First Affiliated Hospital of Soochow UniversitySuzhou215006China Department of Urology Soochow University Affiliated Wuxi Ninth HospitalWuxi214000China

Recent studies suggested that LIM and SH3 protein 1(LASP-1)is a promising therapeutic target for renal cell cancer(RCC).This study aimed to explore the role of LASP-1 in *** this purpose,LASP-1 expression in RCC tissues was analyzed by immunohistochemistry and Western blot *** proliferation,migration,invasion,and gene expression were detected by CCK-8 assay,Transwell assay,and Western blot *** results showed that LASP-1 was highly expressed in RCC,and its expression level,t was positively correlated with lymph node metastasis and tumor,nodes,and metastases(TNM)*** knockdown of LASP-1 expression significantly inhibited the proliferation of RCC cells,increased the apoptosis rate,and inhibited RCC cell invasion and migration by inhibiting epithelial–mesenchymal *** conclude that LASP-1 promotes RCC progression and metastasis and is a promising therapeutic target for RCC.

关键词： LASP-1 Oncolytic adenovirus Renal cell cancer

Instability mechanism of mining roadway passing through fault at different angles in kilometre-deep mine and control measures of roof cutting and NPR cables

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Journal of Mountain Science 2024年第1期21卷 236-251页

作者： SUN Xiaoming WANG Jian zhao wenchao MING Jiang ZHANG Yong LI Zhihu MIAO Chengyu GUO Zhibiao HE Manchao State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and Technology(Beijing)Beijing 100083China School of Mechanics and Civil Engineering China University of Mining and Technology(Beijing)Beijing 100083China

The angle α between the fault strike and the axial direction of the roadway produces different damage characteristics. In this paper, the research methodology includes theoretical analyses, numerical simulations and field experiments in the context of the Daqiang coal mine located in Shenyang, China. The stability control countermeasure of "pre-splitting cutting roof + NPR anchor cable"(PSCR-NPR) is simultaneously proposed. According to the different deformation characteristics of the roadway, the faults are innovatively classified into three types, with α of type I being 0°-30°, α of type II being 30°-60°, and α of type III being 60°-90°. The full-cycle stress evolution paths during mining roadway traverses across different types of faults are investigated by numerical simulation. Different pinch angles α lead to high stress concentration areas at different locations in the surrounding rock. The non-uniform stress field formed in the shallow surrounding rock is an important reason for the instability of the roadway. The pre-cracked cut top shifted the high stress region to the deep rock mass and formed a low stress region in the shallow rock mass. The high prestressing NPR anchor cable transforms the non-uniform stress field of the shallow surrounding rock into a uniform stress field. PSCR-NPR is applied in the fault-through roadway of Daqiang mine. The low stress area of the surrounding rock was enlarged by 3-7 times, and the cumulative convergence was reduced by 45%-50%. It provides a reference for the stability control of the deep fault-through mining roadway.

关键词： Kilometre-deep mine Fault Mining roadway Failure mechanism Pre-splitting cutting roof High pre-stress NPR anchor cable

Phase reconfiguration of heterogeneous CoFeS/CoNiS nanoparticles for superior battery-type supercapacitors

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Journal of Energy Chemistry 2024年第9期96卷 217-225页

作者： Lina Ma Fan Li Min Zhou Jidong Dong Hao Luo Wei Zhang wenchao zhao Xinliang Li Zaixing Jiang Yudong Huang College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071ShandongChina School of Materials Science and Engineering Xiamen University of TechnologyXiamen 361024FujianChina Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjing 210037JiangusChina Key Laboratory of Material Physics Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052HenanChina MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage State Key Laboratory of Urban Water Resource and EnvironmentSchool of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangChina Material Science and Engineering College Northeast Forestry UniversityHarbin 150040HeilongjiangChina

Developing advanced battery-type materials with abundant active sites,high conductivity,versatile morphologies,and hierarchically porous structures is crucial for realizing high-quality hybrid ***,heterogeneous FeS@NiS is synthesized by cationic Co doping via surface-structure *** density functional theory(DFT)theoretical calculations are firstly performed to predict the advantages of Co dopant by improving the OH^(−)adsorption properties and adjusting electronic structure,benefiting ions/electron *** dynamic surface evolution is further explored which demonstrates that CoFeS@CoNiS could be quickly reconstructed to Ni(Co)Fe_(2)O_(4)during the charging process,while the unstable structure of the amorphous Ni(Co)Fe_(2)O_(4)results in partial conversion to Ni/Co/FeOOH at high potentials,which contributes to the more reactive active site and good structural ***,the free-standing electrode reveals excellent electrochemical performance with a superior capacity(335.6 mA h g^(−1),2684 F g^(−1))at 3 A g^(−1).Furthermore,the as-fabricated device shows a quality energy density of 78.1 W h kg^(−1)at a power density of 750 W kg^(−1)and excellent cycle life of 92.1%capacitance retention after 5000 *** work offers a facile strategy to construct versatile morphological structures using electrochemical activation and holds promising applications in energy-related fields.

关键词： In-situ reconfiguration Heterogeneous design Battery-type supercapacitors Superior performance Sulphide

The SlWRKY57-SlVQ21/SlVQ16 module regulates salt stress in tomato

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Journal of Integrative Plant Biology 2023年第11期65卷 2437-2455页

作者： Jilin Ma Chonghua Li Lulu Sun Xuechun Ma Hui Qiao wenchao zhao Rui Yang Susheng Song Shaohui Wang Huang Huang Plant Science and Technology College Beijing University of AgricultureBeijing 102206China Beijing Key Laboratory for Agricultural Application and New Technique Beijing University of AgricultureBeijing 102206China College of Life Sciences Capital Normal UniversityBeijing 100048China

Salt stress is a major abiotic stress which severely hinders crop ***,the regulatory network controlling tomato resistance to salt remains ***,we found that the tomato WRKY transcription factor WRKY57 acted as a negative regulator in salt stress response by directly attenuating the transcription of salt-responsive genes(Sl RD29B and Sl DREB2)and an ion homeostasis gene(Sl SOS1).We further identified two VQ-motif containing proteins Sl VQ16 and Sl VQ21as Sl WRKY57-interacting *** VQ16 positively,while Sl VQ21 negatively modulated tomato resistance to salt *** VQ16 and Sl VQ21 competitively interacted with Sl WRKY57 and antagonistically regulated the transcriptional repression activity of Sl ***,the Sl WRKY57-Sl VQ21/Sl VQ16 module was involved in the pathway of phytohormone jasmonates(JAs)by interacting with JA repressors JA-ZIM domain(JAZ)*** results provide new insights into how the Sl WRKY57-Sl VQ21/Sl VQ16 module finely tunes tomato salt tolerance.

关键词： jasmonates salt stress tomato VQ protein WRKY transcription factor

The miR396a-SlGRF8 module regulates sugar accumulation in the roots via SlSTP10 during the interaction between root-knot nematodes and tomato plants

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JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2024年第12期66卷 2701-2715页

作者： Sun, Lulu Zhu, Mengting Zhou, Xiaoxuan Gu, Ruiyue Hou, Yuying Li, Tongtong Huang, Huang Yang, Rui Wang, Shaohui zhao, wenchao Beijing Univ Agr Coll Plant Sci & Technol Beijing 102206 Peoples R China Beijing Univ Agr Beijing Key Lab Agr Applicat & New Tech Beijing 102206 Peoples R China

Root-knot nematodes (RKNs;Meloidogyne spp.) are a serious threat to crop production. The competition between plants and pathogens for assimilates influences the outcome of their interactions. However, the mechanisms by which plants and nematodes compete with each other for assimilates have not been elucidated. In this study, we demonstrated that miR396a plays a negative role in defense against RKNs and a positive role in sugar accumulation in tomato roots. The overexpression of SlGRF8 (Solanum lycopersicum growth-regulating factor 8), the target of miR396a, decreased the sugar content of the roots and the susceptibility to RKNs, whereas the grf8-cr mutation had the opposite effects. Furthermore, we confirmed that SlGRF8 regulated the sugar content in roots by directly activating the transcription of SlSTP10 (Solanum lycopersicum sugar transporter protein 10) in response to RKN stress. Moreover, SlSTP10 was expressed primarily in the tissues surrounding giant cells, and the SlSTP10 knockout increased both the sugar content in the roots and the plant's susceptibility to RKNs. Overall, this study provides important insight into the molecular mechanism through which the miR396a-SlGRF8-SlSTP10 module regulates sugar allocation in roots under RKN stress.

关键词： miR396a SlGRF8 SlSTP10 tomato root-knot nematode sugar