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Design and preparation of a crosslinkable,oil-resistant,and bio-based elastomer from fumarate

Science China Chemistry 2024年第2期67卷 622-631页

作者： Hui Yang haijun Ji Xinxin Zhou Shihan Yang Liwei Li Chaoying Sun Weiwei Lei Runguo Wang Liqun Zhang Beijing State Key Laboratory of Organic-Inorganic Composites&Beijing Laboratory of Biomedical Materials Beijing University of Chemical TechnologyBeijing100029China Hubei Key Laboratory of Polymer Materials Faculty of Materials Science and EngineeringHubei UniversityWuhan430062China

Poly(diethyl fumarate-co-methoxyethyl acrylate-co-vinyl chloroacetate)(PDEFMV),a novel bio-based elastomer with a saturated structure,was synthesized via redox emulsion polymerization.The glass-transition temperatures of PDEFMV,adjusted through the variation of the diethyl fumarate-to-methoxyethyl acrylate feeding ratio,ranged from-36.1 to-14.8 ℃.The number-average molecular weights of PDEFMV ranged from 384,000 to 46,000 g/mol.In designing the molecular structure,vinyl chloroacetate was used to provide active sites for subsequent vulcanization and crosslinking.The active chlorine groups within the PDEFMV chain reacted with the crosslinking agent trithiocyanuric acid under high temperature and pressure to form a nonsulfur crosslinked three-dimensional network structure.To achieve the desired properties,carbon black(CB,N330) was incorporated to reinforce PDEFMV,leading to the formation of PDEFMV/CB composites.A comprehensive study was conducted on the high-temperature oil resistance of PDEFMV/CB composites.Following immersion in IRM903 oil at temperatures of 150 and 200 ℃ for 72 h,the mass and volume changes in PDEFMV/CB were lower than those observed in commercially available acrylate rubber(AR)/CB,indicating that PDEFMV exhibited superior oil resistance.Furthermore,the aging characteristics and mechanisms of oil resistance in the PDEFMV/CB and AR/CB composites were investigated at different temperatures(150,200,and 250 ℃).The results provide insights into the operational temperature ranges suitable for PDEFMV/CB and offer valuable guidance for potential industrial applications.

关键词： diethyl fumarate molecular design bio-based elastomer solvent-free synthetic route high-temperature oil resistance

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Osteology of Leptobrachella bijie(Anura,Megophryidae)

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Asian Herpetological Research 2024年第2期15卷 90-103页

作者： Wei LI Meihua ZHANG Zhonghao LUO Jing LIU Tuo SHEN Bo CHEN haijun SU Bin WANG College of Forestry Guizhou UniversityGuiyang 550025GuizhouChina Chengdu Institute of Biology Chinese Academy of SciencesChengdu 610041SichuanChina

The Asian leaf litter toad genus Leptobrachella contains more than 100 species widely distributed in southwestern Asia.However,the systematic profiles of this group remain unresolved.Osteological morphology is important for taxonomic and phylogenetic studies.However,few studies have focused on the osteology of the genus.Herein,we comprehensively described the osteological features of a representative species L.bijie based on micro-CT scanning and double-staining methods.The results show that the skull of adult L.bijie is well-ossified,exhibiting sexual dimorphism and minimal intraspecific variation.The skull length is slightly greater than the width,with the maxilla slightly overlapping with the quadratojugal.The nasal connects with the sphenethmoid in males,but only part or not connects with the sphenethmoid in females.The transverse processes of the sacrum are robust and symmetrically butterfly-shaped,and the presacral vertebrae are procoelous.The pectoral girdle is arciferous.The phalangeal formula is 2-2-3-3 for the hand,and 2-2-3-4-3 for the foot.This study provides the first detailed and comprehensive osteological accounts of the genus Leptobrachella.

关键词： sexual dimorphism skeleton taxonomy

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Boosting overall saline water splitting by constructing a strain-engineered high-entropy electrocatalyst

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Carbon Energy 2024年第2期6卷 154-166页

作者： Ateer Bao Yaohang Gu Yuxuan Zhang Bowen Zhang Juncheng Wu Bo Ni Xiaoyan Zhang haijun Pan Xiwei Qi School of Materials Science and Engineering Northeastern UniversityShenyangChina School of Resources and Materials Northeastern University at QinhuangdaoQinhuangdaoChina Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province Northeastern University at QinhuangdaoQinhuangdaoChina College of Metallurgy and Energy North China University of Science and TechnologyTangshanChina

High-entropy materials(HEMs),which are newly manufactured compounds that contain five or more metal cations,can be a platform with desired properties,including improved electrocatalytic performance owing to the inherent complexity.Here,a strain engineering methodology is proposed to design transition-metal-based HEM by Li manipulation(LiTM)with tunable lattice strain,thus tailoring the electronic structure and boosting electrocatalytic performance.As confirmed by the experiments and calculation results,tensile strain in the LiTM after Li manipulation can optimize the d-band center and increase the electrical conductivity.Accordingly,the asprepared LiTM-25 demonstrates optimized oxygen evolution reaction and hydrogen evolution reaction activity in alkaline saline water,requiring ultralow overpotentials of 265 and 42 mV at 10 mA cm−2,respectively.More strikingly,LiTM-25 retains 94.6%activity after 80 h of a durability test when assembled as an anion-exchange membrane water electrolyzer.Finally,in order to show the general efficacy of strain engineering,we incorporate Li into electrocatalysts with higher entropies as well.

关键词： d-band center electrical conductivity high-entropy electrocatalyst lattice-strain engineering saline/alkaline water splitting

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Defect engineered nickel hydroxide nanosheets for advanced pseudocapacitor electrodes

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Nano Research 2024年第6期17卷 5233-5242页

作者： Yaohang Gu Yuxuan Zhang Xuanyu Wang Ateer Bao Bo Ni haijun Pan Xiaoyan Zhang Xiwei Qi School of Materials Science and Engineering Northeastern UniversityShenyang 110189China College of Metallurgy and Energy North China University of Science and TechnologyTangshan 063210China Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province School of Resources and MaterialsNortheastern University at QinhuangdaoQinhuangdao 066004China School of Resources and Materials Northeastern University at QinhuangdaoQinhuangdao 066004China

While the past years have witnessed great achievement in pseudocapacitors,the inauguration of electrode materials of high-performance still remains a formidable challenge.Moreover,the capacity and rate capability of the electrode depends largely on its electrical conductivity,which ensures fast charge transfer kinetics in both the grain bulk and grain boundaries.Here,nickel hydroxides with oxygen vacancies are facilely fabricated via a hydrothermal method.The active materials exhibit a high specific capacitance of 3250 F·g^(−1)and a high areal of capacitance of 14.98 F·cm^(−2)at 4.6 mA·cm^(−2).The asymmetric supercapacitor device based on our material delivers a high energy density of~71.6 Wh·kg^(−1)and a power density of~17,300 W·kg^(−1)and could retain~95%of their initial capacitance even after 30,000 cycles.In addition,the defect-rich hydroxides demonstrate higher electrical conductivity as well as dielectric constant,which is responsible for the superior pseudocapacitive performance.Our new scientific strategy in terms of taking the advantages of oxygen vacancies might open up new opportunities for qualified pseudocapacitive materials of overall high performances not only for nickel hydroxides but also for other metal hydroxides/oxides.

关键词： pseudocapacitors nickel hydroxides oxygen vacancies electrical conductivity

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异噁唑虫酰胺的研究开发与应用进展

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世界农药 2023年第8期45卷 11-22,35页

作者：谭海军苏州艾科尔化工科技有限公司江苏苏州215300

有害生物耐药性的增强和高风险农药的禁限用迫切需要新型绿色农药。异噁唑啉类杀虫剂是作物保护和动物保健领域的新热点。作为先正达公司新开发的首个异噁唑啉类杀虫剂,异噁唑虫酰胺具有独特的化学结构和作用机制、广谱高效的杀虫活性... 详细信息

有害生物耐药性的增强和高风险农药的禁限用迫切需要新型绿色农药。异噁唑啉类杀虫剂是作物保护和动物保健领域的新热点。作为先正达公司新开发的首个异噁唑啉类杀虫剂,异噁唑虫酰胺具有独特的化学结构和作用机制、广谱高效的杀虫活性、较高的环境生态安全性以及相对较低的生产和使用成本,目前正在全球进行田间试验和应用登记,市场前景广阔。对异噁唑虫酰胺的理化性质、毒性、作用机制、生物活性、代谢残留、合成分析和制剂应用等进行总结介绍,旨在为异噁唑虫酰胺及同类杀虫剂的研究开发与应用提供指导。

关键词：异噁唑虫酰胺异噁唑啉类杀虫剂生物活性合成应用

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γ-氨基丁酸门控氯离子通道受体及其靶标杀虫剂

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世界农药 2022年第2期44卷 38-53页

作者：谭海军苏州艾科尔化工科技有限公司江苏昆山215300

作为半胱氨酸环配体门控离子通道超家族成员之一,γ-氨基丁酸门控氯离子通道(GABA-Cl)主要介导神经系统快速抑制性神经传递。由于其在昆虫和脊椎动物体内存在显著差异,GABA-Cl受体成为了现代杀虫剂研发的理想靶标。对GABA-Cl受体的结构... 详细信息

作为半胱氨酸环配体门控离子通道超家族成员之一,γ-氨基丁酸门控氯离子通道(GABA-Cl)主要介导神经系统快速抑制性神经传递。由于其在昆虫和脊椎动物体内存在显著差异,GABA-Cl受体成为了现代杀虫剂研发的理想靶标。对GABA-Cl受体的结构和功能进行介绍,并对其靶标杀虫剂的研发背景与现状、化学合成、作用机制、生物活性与安全性进行总结,旨在为GABA-Cl受体靶标杀虫剂的研究、开发和应用提供指导。

关键词： γ-氨基丁酸门控氯离子通道受体芳基吡唑类杀虫剂异噁唑啉类杀虫剂间苯二酰胺类杀虫剂

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中国创制新烟碱类杀虫剂的研究与开发进展

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世界农药 2023年第1期45卷 1-12,55页

作者：谭海军苏州艾科尔化工科技有限公司江苏昆山215300

新烟碱类杀虫剂源于对烟碱及其类似物的研究,至今已有吡虫啉、烯啶虫胺、啶虫脒和三氟苯嘧啶等10多个品种得以成功开发和应用。以已有专利为基础进行深入的筛选开发,或以已有品种为先导化合物进行创制研究,中国研究机构研发出了多个新... 详细信息

新烟碱类杀虫剂源于对烟碱及其类似物的研究,至今已有吡虫啉、烯啶虫胺、啶虫脒和三氟苯嘧啶等10多个品种得以成功开发和应用。以已有专利为基础进行深入的筛选开发,或以已有品种为先导化合物进行创制研究,中国研究机构研发出了多个新烟碱类杀虫剂新品种。从化学合成、作用机制、生物活性、安全性和应用开发等方面对中国创制新烟碱类杀虫剂的研究开发进展进行总结,旨在进一步推动其产业化和应用,为农药可持续发展提供基础。

关键词：烟碱乙酰胆碱受体新烟碱类杀虫剂化学合成作用机制生物活性农药创制

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中国生物农药的概述与展望

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世界农药 2022年第4期44卷 16-27,54页

作者：谭海军苏州艾科尔化工科技有限公司江苏昆山215300

农药在控制有害生物为害和促进农作物增产等方面具有重要作用。相比化学农药,生物农药具有相对较低的风险而逐渐成为行业优先发展的方向。中国是生物农药研究和应用最重要的国家之一,其生物农药的发展举世瞩目。中国的生物农药涵盖了生... 详细信息

农药在控制有害生物为害和促进农作物增产等方面具有重要作用。相比化学农药,生物农药具有相对较低的风险而逐渐成为行业优先发展的方向。中国是生物农药研究和应用最重要的国家之一,其生物农药的发展举世瞩目。中国的生物农药涵盖了生物化学农药、微生物农药、农用抗生素、植物源农药、转基因生物和天敌生物等类别,其登记数量占总数的近10%。对中国生物农药的定义和范畴进行探讨,对中国登记(过)的和具有商业化开发潜力的生物农药品种按类别从特点和作用机制等方面进行总结,同时对生物农药在中国的发展进行展望,以期进一步促进该类农药的研发、应用和推广。

关键词：生物农药微生物农药生物化学农药植物源农药天敌生物农用抗生素

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