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Lightweight,Strong and High Heat-Resistant Poly(lactide acid)Foams via Microcellular Injection Molding with Self-Assembly Nucleating Agent

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Chinese Journal of Polymer Science 2024年第6期42卷 739-750页

作者： Xiao-Hu Bing wen-Yu Ma Ming-Hui Wu Peng Gao Xiao Zhou Hai-Bin Luo Long Wang wen-ge zheng School of materials Science and Engineering Shanghai UniversityShanghai200444China Ningbo Key Lab of Polymer Materials Ningbo Institute of Material Technology and EngineeringChinese Academy of SciencesNingbo315201China University of Chinese Academy of Sciences Beijing100049China

Poly(lactide acid)(PLA)foams have shown considerable promise as eco-friendly alternatives to nondegradable plastic foams,such as polystyrene(PS)***,PLA foam typically suffers from low heat-resistance and poor cellular structure stemming from its inherent slow crystallization rate and low melt *** this study,a high-performance PLA foam with well-defined cell morphology,exceptional strength and enhanced heat-resistance was successfully fabricated via a core-back microcellular injection molding(MIM)*** scanning calorimetry(DSC)results revealed that the added hydrazine-based nucleating agent(HNA)significantly increased the crystallization temperature and accelerated the crystallization process of ***,the addition of a 1.5 wt%of HNA led to a significant reduction in PLA’s cell size,from 43.5µm to 2.87µm,and a remarkable increase in cell density,from 1.08×10^(7)cells/cm^(3)to 2.15×10^(10)cells/cm^(3).This enhancement resulted in a final crystallinity of approximately 55.7%for the PLA blend foam,a marked improvement compared to the pure PLA ***,at 1.5 wt%HNA concentration,the tensile strength and tensile toughness of PLA blend foams demonstrated remarkable improvements of 136%and 463%,***,the Vicat softening temperature of PLA blend foam increased significantly to 134.8°C,whereas the pure PLA foam exhibited only about 59.7℃.These findings underscore the potential for the preparation of lightweight injection-molded PLA foam with enhanced toughness and heat-resistance,which offers a viable approach for the production of high-performance PLA foams suitable for large-scale applications.

关键词： Poly(lactide acid) Nucleating agent Microcellular injection molding Heat-resistance Toughness

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Studies on the reactions of silyl enol ether with perfluoroorganic compounds——I. The reaction of silyl enol ether with perfluoroalkyl iodide

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Chinese Journal of Chemistry 1991年第6期9卷 527-535页

作者： ge wen-zheng WU Yong-Ming HUANG Wei-Yuan Shanghai Institute of Organic Chemistry The Chinese Academy of SciencesShanghai 200032

The reaction of silyl enol ethers (la-le) with perfluoroalkyl iodides (2f-2k) initiated with sodium dithionite was studied, α-Perfluoroalkyl ketones (3) were synthesized in excellent yield by this method, α,β-Unsaturated fluorinated ketones (4) were obtained easily by dehydrofluorination of the α-perfluoroalkyl ketones. A radical mechanism was proposed.

关键词： CIC CHC SF CF ppm Studies on the reactions of silyl enol ether with perfluoroorganic compounds The reaction of silyl enol ether with perfluoroalkyl iodide

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The nucleophilic reaction of polyfluoroaromatic compounds——II. The nucleophilic cyclization of chloropentafluorobenzene

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Chinese Journal of Chemistry 1988年第3期6卷 238-243页

作者： ge wen-zheng HU Li-Qing HUANG Wei-Yuan*, Shanghai Institute of Organic Chemistry Academia Sinica, Shanghai Shanghai Institute of Organic Chemistry Academia Sinica Shanghai

The results of cyclization reaction between chloropentafluorobenzene and bifunctionalnucleophiles such as XCH2CH2OH（X =OH, NHMe, NHEt） and HN （CH2CH2OH）2, NH2CH2CH2NH2were reported. It was found that the NaH/DMF system was a better reagent for the preparation ofsodium alcoholates and the yields of cyclic products ranged from 50-80% which were muchhigher than that reported by previous workers.3

关键词： The nucleophilic cyclization of chloropentafluorobenzene The nucleophilic reaction of polyfluoroaromatic compounds II

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Nucleophilic substitution reaction in polyfluoroaromaticsⅠ.Reactions with secondary amine nucleophiles

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Chinese Journal of Chemistry 1985年第4期 349-355页

作者： ge wen-zheng WU Bao-Ming HUANG Wei-Yuan Shanghai Institute of Organic Chemistry,Academia Sinica,Shanghai

Perfluorobenzene,chloropentafluorobenzene and dichlorotetrafluorobenzene werereacted with pyrrolidine,piperidine,morpholine,diethylamine and dipropylamine in aprotic polarsolvents such as DMF and *** perfluorobenzene monosubstituted products were *** reaction time or raising the reaction temperature caused the formation of the para disub-stituted products in *** chloropentafluorobenzene,only the para substituted products wereobtained in *** was available as an isomeric mixtures of m:o:p=73:18:*** pyrrolidine,only the m-and o-dichlorotetrafluorobenzene reacted with the secondary amines toform the expected *** is because of the fact that reaction in polar solvents favors theformation of the products with substituent para to chlorine,but the p-dichlorotetrafluorobenzenehas no para fluorine to be *** the most active pyrrolidine however,attack at the positionortho to chlorine *** activity sequence of these secondary amine nucleophiles are attributed to both steric andpolar ***>piperidine>morpholine>diethylamine>dipropylamine>diisopropylamineAll of the products were identified by NMR,IR,GLC and elemental analyses and isomeric ratioswere calculated from quantitative NMR measurements.

关键词： NC Nucleophilic substitution reaction in polyfluoroaromatics Reactions with secondary amine nucleophiles

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The reactions of perfluoroalkanesulfinates——Ⅱ.A new method for the synthesis of N,N-bisperfluoroalkylhydroxylamine

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Chinese Journal of Chemistry 1988年第2期 175-179页

作者： HUANG Wei-Yuan HU Li-Qing ge wen-zheng Shanghai Institute of Organic Chemistry,Academia Sinica,Shanghai

The reaction of sodium or silver perfluoroalkanesulfinate with nitric acid,nitrous acidor nitrogen dioxide in aqueuos solution gave a moderate yield of N,N-bisperfluoroalkylhydroxylamineaccompanied by perfluorocarboxy... 详细信息

关键词： CI OC CF A new method for the synthesis of N,N-bisperfluoroalkylhydroxylamine The reactions of perfluoroalkanesulfinates

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Sine oculis homeobox homolog family function in gastrointestinal cancer:Progression and comprehensive analysis

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World Journal of Clinical Oncology 2025年第1期16卷 10-24页

作者： Yang-zheng Lan zheng Wu wen-Jia Chen Xin-Ning Yu Hua-Tao Wu Jing Liu Department of The Breast Center Cancer Hospital of Shantou University Medical CollegeShantou 515041Guangdong ProvinceChina Department of general Surgery First Affiliated Hospital of Shantou University Medical CollegeShantou 515041Guangdong ProvinceChina

The sine oculis homeobox homolog(SIX)family,a group of transcription factors characterized by a conserved DNA-binding homology domain,plays a critical role in orchestrating embryonic development and organogenesis across various organisms,including *** six distinct members,from SIX1 to SIX6,each member contributes uniquely to the development and differentiation of diverse tissues and organs,underscoring the versatility of the SIX *** or mutations in SIX genes have been implicated in a spectrum of developmental disorders,as well as in tumor initiation and progression,highlighting their pivotal role in maintaining normal developmental trajectories and cellular *** to target the transcriptional complex of the SIX gene family have emerged as a promising strategy to inhibit tumor *** the development of inhibitors targeting this gene family is still in its early stages,the significant potential of such interventions holds promise for future therapeutic ***,this review aimed to comprehensively explore the advancements in understanding the SIX family within gastrointestinal cancers,focusing on its critical role in normal organ development and its implications in gastrointestinal cancers,including gastric,pancreatic,colorectal cancer,and hepatocellular *** conclusion,this review deepened the understanding of the functional roles of the SIX family and explored the potential of utilizing this gene family for the diagnosis,prognosis,and treatment of gastrointestinal cancers.

关键词： Sine oculis homeobox homolog Gastrointestinal cancer Transcription factor Development Regulation Diagnosis Therapeutics

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四氟乙烯五聚体与KH—550的反应产物结构的探讨

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陕西科技大学学报 1988年第1期 78-84页

作者：徐学成葛文正中国科学院上海有机化学研究所

本文通过五聚体与正丁胺的模拟反应,经1H,19F和29SiNMR,IR,MS和元素分析鉴定了五聚体与KH-550的反应产物的结构。在五聚体与KH-550的反应过程中,氟离子进攻硅原子形成硅氟键。由此研究了五聚体与吡啶的摩尔比与产物的结构的关系。结果表... 详细信息

本文通过五聚体与正丁胺的模拟反应,经1H,19F和29SiNMR,IR,MS和元素分析鉴定了五聚体与KH-550的反应产物的结构。在五聚体与KH-550的反应过程中,氟离子进攻硅原子形成硅氟键。由此研究了五聚体与吡啶的摩尔比与产物的结构的关系。结果表明:吡啶量的增加减少了氟取代硅原子上的乙氧基的可能性。

关键词：五聚体正丁胺摩尔比反应产物四氟乙烯全氟代烃 KH

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Porous Organic Cage‑Based Quasi‑Solid‑State Electrolyte with Cavity‑Induced Anion‑Trapping Effect for Long‑Life Lithium Metal Batteries

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Nano-Micro Letters 2025年第2期17卷 376-386页

作者： Wei-Min Qin Zhongliang Li wen‑Xia Su Jia‑Min Hu Hanqin Zou Zhixuan Wu Zhiqin Ruan Yue‑Peng Cai Kang Li Qifeng zheng School of Chemistry South China Normal UniversityGuangzhou 510006People’s Republic of China Key Laboratory of Functional Metal‑Organic Compounds of Hunan Province College of Chemistry and Material ScienceHengyang Normal UniversityHengyang 421008People’s Republic of China Guangzhou Key Laboratory of Energy Conversion and Energy Storage Materials Guangzhou 510006People’s Republic of China

Porous organic cages(POCs)with permanent porosity and excellent host–guest property hold great potentials in regulating ion transport behavior,yet their feasibility as solid-state electrolytes has never been testified in a practical ***,we design and fabricate a quasi-solid-state electrolyte(QSSE)based on a POC to enable the stable operation of Li-metal batteries(LMBs).Benefiting from the ordered channels and cavity-induced anion-trapping effect of POC,the resulting POC-based QSSE exhibits a high Li+transference number of 0.67 and a high ionic conductivity of 1.25×10^(−4) S cm^(−1) with a low activation energy of 0.17 *** allow for homogeneous Li deposition and highly reversible Li plating/stripping for over 2000 *** a proof of concept,the LMB assembled with POC-based QSSE demonstrates extremely stable cycling performance with 85%capacity retention after 1000 ***,our work demonstrates the practical applicability of POC as SSEs for LMBs and could be extended to other energy-storage systems,such as Na and K batteries.

关键词： Porous organic cage Cavity-induced anion-trapping Quasi-solid-state electrolyte Homogeneous Li+flux Lithium metal battery

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