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Random Terpolymer Based on Simple Siloxane-functionalized Thiophene Unit Enabling High-performance Non-fullerene Organic Solar Cells

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Chinese Journal of Polymer Science 2024年第3期42卷 311-321,I0006页

作者： Fuliang Cheng Shiting Lai Yihan Zhang Ling Xue Xinxin Xia Peipei Zhu Xinhui Lu Xunfan Liao Yiwang Chen National Engineering research center for Carbohydrate Synthesis/Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education College of Chemistry and Chemical EngineeringJiangxi Normal UniversityNanchang 330022China Department of Physics Chinese University of Hong Kong New TerritoriesHong Kong 999077China Institute of Polymers and Energy Chemistry(IPEC)/Jiangxi Provincial Key Laboratory of New Energy Chemistry Nanchang UniversityNanchang 330031China

Incorporation of siloxane-functionalized units into polymers backbone has proven to be an efficient strategy to improve photovoltaic performance. In this work, a low-cost siloxane-containing unit was developed to construct a series of terpolymers, and the effects of siloxane on the polymer performance were systematically studied. Different contents of thiophene containing siloxane-functionalized side chain were introduced into PM6 to obtain a series of polymers(PM6, PM6-SiO-10, PM6-SiO-20 and PM6-SiO-30). The siloxane-functionalized side chains in polymers have only a slight effect on the absorption behavior and frontier molecular orbitals. However, when the siloxane content increased, the terpolymers' aggregation property decreased and the temperature-dependency increased, leading to improved donor-acceptor compatibility. The power conversion efficiency(PCE) based on PM6:Y6, PM6-SiO-20:Y6 and PM6-SiO-30:Y6 devices was 15.64%, 16.03% and 15.82%, respectively. In comparison, the active layer based on PM6-SiO-10:Y6 exhibits the most appropriate phase separation morphology, resulting in effective exciton dissociation, more balanced hole-electron transport and less recombination. Consequently, the highest PCE of 16.69% with an outstanding shortcircuit current density of 26.96 mA·cm^(-2) was obtained, which are one of the highest values for siloxane-functionalized polymer-based *** work demonstrates that finely controlling the content of siloxane-functionalized thiophene is beneficial for obtaining high-performance terpolymer donors and provides a novel and low-cost method to improve photovoltaic performance.

关键词： Organic solar cells Terpolymers Siloxane-functionalized unit Low-cost Morphology

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Characteristics and mechanism of Ni2+ and Cd2+ adsorption by recovered perlite from agar extraction residue

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Chinese Journal of Chemical Engineering 2024年第08期 141-152页

作者： Juan Wang Yanbing Zhu Zedong Jiang Xiping Du Mingjing Zheng Lijun Li Hui Ni Yuanpeng Wang Zhipeng Li Qingbiao Li College of Ocean Food and Biological Engineering Jimei University Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering research center of Food Biotechnology of Xiamen City Xiamen Ocean Vocational College College of Chemistry and Chemical Engineering Xiamen University

Ni2+and Cd2+in wastewater accumulated through the ecological chain and could jeopardize human health. Adsorption of Ni2+and Cd2+from wastewater using recovered perlite was an important way to solve the problem of resource utilization of solid waste from agar production. Our previous study confirmed that recovered perlite from agar extraction residue had better pore size and specific surface area than commercial perlite. However, the adsorption efficiency and adsorption mechanism of recovered perlite were the main factors limiting its adsorption application. The adsorption process of Ni2+and Cd2+by recovered perlite in aqueous solution was described by the pseudo-second-order kinetic equation, and the relevant adsorption mechanism was mainly chemisorption. Compared with commercial perlite, the adsorption removal rate of Ni2+and Cd2+by enzymatic recovered perlite could reach 92.9% and 89.2%, respectively, and were improved by 12.63% and 13.03%. Langmuir isothermal adsorption model could better describe the isothermal adsorption process of recovered perlite on heavy metal Ni2+and Cd2+, and the relevant adsorption mechanism was mainly monolayer adsorption. The X-ray photoelectron spectroscopy（XPS） results indicated that the decrease of Si—O Si2+hydroxyl coordination bond and the increase of C—Si bond might make the binding effect of recovered perlite with heavy metals stronger. The competitive adsorption of Ni2+and Cd2+by recovered perlite was still dominated by chemisorption and monolayer adsorption. This study was expected to provide a theoretical basis and technical support for the removal of Ni2+and Cd2+from wastewater using recovered perlite from seaweed residue.

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Nano friction behaviour between magnetic materials and copper considering the inter-diffusion effect

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Friction 2024年第7期12卷 1532-1547页

作者： Zilin LI Lisha DOU Shiyu YANG Huajiang OUYANG Qichen ZHU Xiaoyang CHEN Xin JIA Shuaiwei DOU Xiaolong CUI Yudong ZHANG Jingjiang QIU Guochen QI Bangbang NIE Pan LIU Ronghan WEI School of Mechanics and Safety Engineering Zhengzhou UniversityZhengzhou 450001China Engineering Technology research center of Henan Province for MEMS Manufacturing and Application Zhengzhou UniversityZhengzhou 450001China Institute of Intelligent Sensing Zhengzhou UniversityZhengzhou 450001China School of Engineering University of LiverpoolLiverpool L693GHUK School of Cyber Science and Engineering&Hanwei Institute of Internet of Things Zhengzhou UniversityZhengzhou 450001China

Copper,permalloy,cobalt,and silicon are the materials that have been widely utilised in magnetic *** the size of interest is down to the nanoscale,the inter-diffusion between certain materials becomes *** paper studies the nanoscale friction characteristics between frictional pairs with and without inter-diffusion properties through the atomic force *** distinct evolution features of nanoscale friction force when inter-diffusion is involved are discovered experimentally,which is also confirmed through theoretical ***,through the thin film deposition method,four pairs of contact materials(Cu–Ni_(81)Fe_(19),Si–Ni_(81)Fe_(19),Cu–Co,Cu–Si)are designed for friction tests,in which diffusion occurs at the interface of Cu–Ni_(81)Fe_(19)***,the effects of sliding velocity and loading force on the nano friction of each pair are *** is found that regardless of the diffusion phenomenon:(1)the adhesion force values exhibit a notable correlation to the values of the friction force;(2)the friction force in all four material pairs consistently increases with the growth of the normal loading force,although the growth rate may *** terms of the sliding velocity effect,the friction forces of immiscible materials(Si–Ni_(81)Fe_(19),Cu–Co,and Cu–Si)are found to increase with the increasing sliding ***,the friction force of Cu–Ni_(81)Fe_(19),decreases with the increasing sliding ***,a compositive friction model considering both the velocity and the normal force effect was proposed,which shows good agreement with the experimental results and explains the nano friction behaviour of both miscible and immiscible metals.

关键词： atomic force microscope friction force normal load sliding velocity

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Highly efficient vanadium redox flow batteries enabled by a trilayer polybenzimidazole membrane assembly

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Carbon Energy 2024年第7期6卷 191-204页

作者： Trung Tuyen Bui Mingyu Shin Mohammad Rahimi Anders Bentien Yongchai Kwon Dirk Henkensmeier Hydrogen·Fuel Cell research center Korea Institute of Science and Technology(KIST)SeoulRepublic of Korea Department of Chemical and Biomolecular Engineering Seoul National University of Science and TechnologySeoulRepublic of Korea Department of Biological and Chemical Engineering Aarhus UniversityAarhusDenmark KIST School Division of Energy and Environment TechnologyUniversity of Science and TechnologySeoulRepublic of Korea Graduate School of Energy and Environment Korea UniversitySeoulRepublic of Korea

A novel polybenzimidazole(PBI)-based trilayer membrane assembly is developed for application in vanadium redox flow battery(VRFB).The membrane comprises a 1μm thin cross-linked poly[2,2′-(p-oxydiphenylene)−5,5′-bibenzimidazole](OPBI)sandwiched between two 20μm thick porous OPBI membranes(p-OPBI)without further lamination *** trilayer membrane demonstrates exceptional properties,such as high conductivity and low area-specific resistance(ASR)of 51 mS cm−1 and 81mΩcm^(2),*** with vanadium electrolyte increases the ASR of trilayer membrane only to 158mΩcm^(2),while that of Nafion is 193mΩcm^(2).VO^(2+)permeability is 2.73×10^(-9) cm^(2) min^(−1),about 150 times lower than that of Nafion *** addition,the membrane has high mechanical strength and high chemical stability against VO^(2+).In VRFB,the combination of low resistance and low vanadium permeability results in excellent performance,revealing high Coulombic efficiency(>99%),high energy efficiency(EE;90.8%at current density of 80mA cm^(−2)),and long-term *** EE is one of the best reported to date.

关键词： polybenzimidazole porous membrane proton conductivity trilayer VRFBs

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molecular simulation study on the evolution process of hydrate residual structures into hydrate

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Chinese Journal of Chemical Engineering 2024年第5期69卷 79-91页

作者： Liwei Cheng Yunfei Li Jinlong Cui Huibo Qin Fulong Ning Bei Liu Guangjin Chen Faculty of Engineering China University of GeosciencesWuhan 430074China State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China College of Science Nanchang Institute of TechnologyNanchang 330099China School of Chemical Engineering Guangdong University of Petrochemical TechnologyMaoming 525000China National center for International research on Deep Earth Drilling and Resource Development China University of Geosciences(Wuhan)Wuhan 430074China

The clathrate hydrate memory effect is a fascinating phenomenon with potential applications in carbon capture,utilization and storage(CCUS),gas separation,and gas storage as it can accelerate the secondary formation of clathrate ***,the underlying mechanism of this effect remains *** gain a better understanding of the mechanism,we conducted molecular dynamic simulations to simulate the initial formation and reformation processes of methane *** this work,we showed the evolution process of hydrate residual structures into hydrate *** simulation results indicate that the residual structures are closely related to the existence of hydrate memory effect,and the higher the contribution of hydrate dissociated water to the hydrate nucleation process,the faster the hydrate *** hydrate dissociation,the locally ordered structures still exist after hydrate dissociation and can promote the formation of cluster structures,thus accelerating hydrate ***,the nucleation process of hydrate and the formation process of clusters are *** size of clusters composed of cup-cage structures is critical for hydrate *** residence time at high temperature after hydrate decomposition will affect the strength of the hydrate memory *** simulation results provide microscopic insights into the occurrence of the hydrate memory effect and shed light on the hydrate reformation process at the molecular scale.

关键词： Memory effect molecular simulation Hydrate reformation Residual structures

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On the Optimal Initial Inner-Core Size for Tropical Cyclone Intensification: An Idealized Numerical Study

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Advances in Atmospheric Sciences 2024年第11期 2141-2155页

作者： Rong FEI Yuqing WANG School of Atmospheric Sciences and Remote Sensing Wuxi University State Key Laboratory of Severe Weather Chinese Academy of Meteorological Sciences International Pacific research center Department of Atmospheric Sciences School of Ocean and Earth Science and Technology University of Hawaii at Manoa

Recent observational and numerical studies have revealed the dependence of the intensification rate on the inner-core size of tropical cyclones(TCs). In this study, with the initial inner-core size(i.e., the radius of maximum wind—RMW)varied from 20–180 km in idealized simulations using two different numerical models, we found a nonmonotonic dependence of the lifetime maximum intensification rate(LMIR) on the inner-core size. Namely, there is an optimal innercore size for the LMIR of a TC. Tangential wind budget analysis shows that, compared to large TCs, small TCs have large inward flux of absolute vorticity due to large absolute vorticity inside the RMW. However, small TCs also suffer from strong lateral diffusion across the eyewall, which partly offsets the positive contribution from large inward flux of absolute vorticity. These two competing processes ultimately lead to the TC with an intermediate initial inner-core size having the largest LMIR. Results from sensitivity experiments show that the optimal size varies in the range of 40–120 km and increases with higher sea surface temperature, lower latitude, larger horizontal mixing length, and weaker initial TC intensity. The 40–120 km RMW corresponds to the inner-core size most commonly found for intensifying TCs in observations, suggesting the natural selection of initial TC size for intensification. This study highlights the importance of accurate representation of TC inner-core size to TC intensity forecasts by numerical weather prediction models.

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Optimal Timing of Antiretroviral Therapy Initiation in Acquired Immunodeficiency Syndrome-Associated Toxoplasmic Encephalitis:A Prospective Observational Multicenter Study in China

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Infectious Diseases & Immunity 2024年第1期4卷 4-9页

作者： Yao Li Haidong Jiang Yanming Zeng Yanqiu Lu Siyuan Chen Yulin Zhang Zhongsheng Jiang Tongtong Yang Shuiqing Liu Yaokai Chen Department of Infectious Diseases Chongqing Public Health Medical CenterChongqing 400036China center for Infectious Diseases Beijing Youan HospitalCapital Medical UniversityBeijing 100069China Department of Infectious Diseases Liuzhou People's HospitalLiuzhou 545006GuangxiChina Department of Infectious Disease The Public Health Clinical Center of ChengduChengdu 610066SichuanChina Department of Infectious Disease Guiyang Public Health Clinical CenterGuiyang 550004GuizhouChina

Background:Toxoplasmic encephalitis(TE)is the most frequent cause of expansive brain lesions among patients with acquired immunodeficiency syndrome(AIDS).However,the optimal timing of antiretroviral therapy(ART)initiation in these patients remains *** study aims to investigate the differences in outcomes of ART initiation at different times,in order to help clarify the treatment timing of AIDS-associated ***:This multicenter prospective observational study included 87 patients recruited from 11 research centers in China(from March 2019 to December 2022).Of the patients,38 were assigned to the early ART group(initiating ART within 2 weeks after anti-Toxoplasma treatment initiation),and the remaining 49 patients received deferred ART(initiating ART at least 2 weeks after anti-Toxoplasma treatment initiation).The main outcomes includedmortality and emergence of immune reconstitution inflammatory syndrome(IRIS).Human immunodeficiency virus(HIV)-1 viral load and CD4^(+)T-cell counts at weeks 24 and 48 were ***:The number of deaths(1 vs.5,P=0.225)and incidence of IRIS(2.6%vs.0,P=0.437)were not significantly different between the early and deferred ART groups at week *** ART initiation did not contribute significantly to HIV-1 viral load control(<50 copies/mL,n=8 vs.n=3 at week 24,P=0.142;n=7 vs.n=7 atweek 48,P=1.000).The median CD4^(+)T-cell counts between the two groups were not significantly different,either at week 24(155 vs.91 cells/mm^(3),P=0.837)or atweek 48(181 vs.146 cells/mm^(3),P=0.219).Conclusion:In patients with AIDS-associated TE,early ART initiation was not significantly different from deferred ART initiation in terms of incidence of mortality,IRIS,and HIV virological and immunological *** registration:This study was registered(registration number:ChiCTR1900021195)as one of 12 clinical trials under the title of a general project at the Chinese Clinical Trial Registry(***)on February 1,***

关键词： HIV Toxoplasma gondii Timing of antiretroviral therapy Virological outcome Immunological response

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Ursolic acid inhibiting excessive reticulophagic flux contributes to alleviate ochratoxin A-induced endoplasmic reticulum stress- and mitochondrial-mediated apoptosis

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Food Science and Human Wellness 2024年

作者： Huiqiong Deng Wenying Chen Lingyun Han Boyang Zhang Xun Luo Song Yao Hongwei Wang Yao Zhou Shuangchao Liu Xiao Li Shen School of Public Health， Zunyi Medical University Chongqing Fuling District center for Disease Control and Prevention Key Laboratory of Maternal & Child Health and Exposure Science of Guizhou Higher Education Institutes research and Development Department，Allife Medicine Inc.

Foods and animal feeds frequently become contaminated with the nephrotoxic ochratoxin A (OTA). Our prior research has indicated that ursolic acid (UA)， which is widely present in fruits and medicinal plants， has the potential to alleviate nephrotoxicity triggered by OTA. Additionally， excessive induction of endoplasmic reticulum (ER)-phagy exacerbates OTA-induced apoptosis. Therefore， further investigation is essential to comprehend whether UA can mitigate OTA-induced apoptosis by influencing ER-phagy. This objective is accomplished through a series of experiments involving assessments of cell viability， apoptosis， fluorescence microscopy， and western blot analysis. The outcomes of these experiments reveal that pre-treatment with 4 μmol/L UA for 2 h can markedly reverse the elevated apoptotic rate， the co-localization of ER and lysosomes， and the protein expressions of GRP78， p-eIF2α， Chop， Bax， and Bak， as well as the reduced cell viability and the protein expressions of Lonp1， Trap1， p62， Tex264， FAM134B， Bcl-2， and Bcl-xl， all caused by exposure to 1 μmol/L OTA for 24 h in human proximal tubule epithelial-originated kidney-2 (HK-2) cells (P < 0.05). Interestingly， the increased expression of LC3B-II induced by OTA is further amplified by UA pre-treatment (P < 0.05). In conclusion， OTA triggers a harmful feedback loop between ER stress (ERS) and excessive ER-phagy， thereby further promoting ERS- and mitochondrial-mediated apoptosis in vitro. However， this effect is significantly mitigated by UA through the inhibition of autophagosome-lysosome fusion， consequently blocking the excessive ER-phagic flux.

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Three types of promising functional building units for designing metal halide nonlinear optical crystals

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结构化学 2024年第6期43卷 8-11页

作者： Jiajing Wu Ru-Ling Tang Sheng-Ping Guo School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou225002PR China School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou225002PR China Yunnan Key Laboratory of Electromagnetic Materials and Devices National Center for International Research on Photoelectric and Energy MaterialsSchool of Material and EnergyYunnan UniversityKunming650000PR China

Nonlinear optical(NLO)crystal materials greatly extend the tunable range of laser by frequency conversion,which promotes the rapid development of laser technology and plays an important role in many civil and military *** excellent and famous NLO crystals from the ultraviolet(UV)to visible to near infrared(NIR)regions have been developed,such as borates(KBe2BO3F2,β-BaB2O4),phosphates(KH2PO4,KTiOPO4),chalcogenides(AgGaS2,AgGaSe2)and so on[1,2].

关键词： optical tunable designing

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A micro-crosslinked amphoteric hydrophobic association copolymer as high temperature-and salt-resistance fluid loss reducer for water-based drilling fluids

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Petroleum Science 2024年第3期21卷 1980-1991页

作者： Jian Li Yu-Xi Ji Xiao-Xiao Ni Kai-He Lv Xian-Bin Huang Jin-Sheng Sun School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580ShandongChina Key Laboratory of Unconventional Oil&Gas Development China University of Petroleum(East China)Qingdao26650ShandongChina Inspection and Testing center of Huabei Oil Field Company PetroChinaRenqiu062552HebeiChina Drilling Fluid research Institute CNPC Engineering Technology R&D Company LimitedBeijing102206China

During ultradeep oil and gas drilling,fluid loss reducers are highly important for water-based drilling fluids,while preparing high temperature-and salt-resistance fluid loss reducers with excellent rheology and filtration performance remains a ***,a micro-crosslinked amphoteric hydrophobic association copolymer(i.e.,DADC)was synthesized using N,N-dimethyl acrylamide,diallyl dimethyl ammonium chloride,2-acrylamido-2-methylpropane sulfonic acid,hydrophobic monomer,and pentaerythritol triallyl ether *** to the synergistic effects of hydrogen bonds,electrostatic interaction,hydrophobic association,and micro-crosslinking,the DADC copolymer exhibited outstanding temperature-and *** rheological experiments have shown that the DADC copolymer had excellent shear dilution performance and a certain degree of salt-responsive viscosity-increasing *** DADC copolymer could effectively adsorb on the surface of bentonite particles through electrostatic interaction and hydrogen bonds,which bring more negative charge to the bentonite,thus improving the hydration and dispersion of bentonite particles as well as the colloidal stability of the drilling ***,the drilling fluids constructed based on the DADC copolymer exhibited satisfactory rheological and filtration properties(FLHTHP=12 m L)after aging at high temperatures(up to200℃)and high salinity(saturated salt)***,this work provided new insights into designing and fabricating high-performance drilling fluid treatment agents,demonstrating good potential applications in deep and ultradeep drilling engineering.

关键词： Fluid loss reducer Temperature-and salt-resistance Hydrophobic association Amphoteric Micro-crosslinking

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