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One pot synthesis of a soluble polymer for zirconium carbide

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Chinese Chemical Letters 2010年第5期21卷 620-623页

作者： Xue Yu Tao wen feng qiu Hao Li Tong Zhao Laboratory of Advanced Polymer Materials Institute of ChemistryChinese Academy of SciencesBeijing 100190China Graduate School of Chinese Academy of Sciences Beijing 100049China

A new polymer,polyzirconoxanesal（PZS）,is synthesized from the reaction of zirconium oxychloride octahydrate （ZrOCl;-8H;O） with acetylacetone（Hacac） and salicyl alcohol（SA） by one-pot *** polymer is soluble in common organic solvents,such as ethanol,methanol,acetone,tetrahydrofuran and chloroform,and exhibits rheology with viscosity of 100- 300 mpa s at 25℃.These properties are suitable for uses in fabrication of ceramic matrix fiber *** of this polymer at 1300℃in argon provides nanosized ZrC with spherical morphology and size of 20-100 nm.

关键词： Zirconium carbide Preceramic polymer Morphology

Salvianolic acid B protects the myelin sheath around injured spinal cord axons

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Neural Regeneration Research 2016年第3期11卷 487-492页

作者： Zhe Zhu Lu Ding wen-feng qiu Hong-fu Wu Rui Li Hand & Foot Surgery and Reparative & Reconstruction Surgery Center the Second Hospital of Jilin University Department of Physiology Guangdong Medical University

Salvianolic acid B,an active pharmaceutical compound present in Salvia miltiorrhiza,exerts a neuroprotective effect in animal models of brain and spinal cord *** acid B can promote recovery of neurological function;however,its protective effect on the myelin sheath after spinal cord injury remains poorly ***,in this study,in vitro tests showed that salvianolic acid B contributed to oligodendrocyte precursor cell differentiation,and the most effective dose was 20 μg/m *** in vivo investigation,rats with spinal cord injury were intraperitoneally injected with 20 mg/kg salvianolic acid B for 8 *** amount of myelin sheath and the number of regenerating axons increased,neurological function recovered,and caspase-3 expression was decreased in the spinal cord of salvianolic acid B-treated animals compared with untreated control *** results indicate that salvianolic acid B can protect axons and the myelin sheath,and can promote the recovery of neurological *** mechanism of action is likely to be associated with inhibiting apoptosis and promoting the differentiation and maturation of oligodendrocyte precursor cells.

关键词： nerve regeneration spinal cord injury salvianolic acid B oligodendrocytes myelin sheath neural regeneration

New route to synthesize preceramic polymers for zirconium carbide

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Chinese Chemical Letters 2012年第9期23卷 1075-1078页

作者： Xue Yu Tao wen feng qiu Hao Li Tong Zhao Xian Yong Wei School of Materials Science and Engineering China University of Mining and TechnologyChina Xuzhou 221116 Laboratory of Advanced Polymer Materials lnstute of ChemistryChinese Academy of SciencesChina Beijing 100190 School of Chemical Engineering and Technology China University of Mining and TechnologyChina Xuzhou 221116

A preceramic polymer, polyzirconosaal （PZSA）, was synthesized by the ligand-exchange reaction between polyzirconoxane （PZO） and salicyl alcohol （SA）. The precursor was air-stable and exhibited excellent solubility and rheology. These properties are useful for the processing of C/C-ZrC composites v/a precursor infiltration and pyrolysis （PIP） process. The polymer to ceramic conversion was investigated by TG, XRD and TEM. Nanosized ZrC was formed by pyrolysis of this precursor at 1300 ℃ in argon with ceramic yield of 57.8%.

关键词： Preceramic polymer Zirconium carbide Precursor infiltration and pyrolysis

Phthalonitrile Resins Derived from Vanillin: Synthesis, Curing Behavior, and Thermal Properties

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Chinese Journal of Polymer Science 2020年第1期38卷 72-83,I0007页

作者： Yue Han Dong-Hao Tang Guang-Xing Wang Ya-Nan Sun Ying Guo Heng Zhou wen-feng qiu Tong Zhao South China Advanced Institute for Soft Matter Science and Technology South China University of Technology Laboratory of Advanced Polymeric Materials Institute of Chemistry Chinese Academy of Sciences University of Chinese Academy of Sciences Sinosteel Anshan Research Institute of Thermo-Energy Co. LTD

Vanillin was used as sustainable source for phthalonitrile monomer synthesis, and allyl/propargyl ether moieties were introduced to improve the processability at the minimal cost of thermal properties. The synthesis route was optimized to minimize side-reactions and simplify post-processing, and the monomers were obtained in high purity and good yields. The curing behavior, mechanism, and processability of the monomers were studied, and the thermal properties of cured polymers were evaluated. Of the two monomers, the allyl ether-containing one exhibited a wide processing window of 185 °C, and was mainly cured into phthalocyanine and linear aliphatic structures through self-catalytic curing process. Also, the glass transition temperature was higher than 500 °C. In contrast, the propargyl ether-containing monomer could only be partially cured, and heat resistance was found to be compromised. Compared with traditional petroleum-based phthalonitrile resins, the biobased monomers could be cured without the addition of catalysts, and improvement in processability was achieved at no cost of thermal performances.

关键词： Allyl ether Curing mechanism Phthalonitrile Thermal properties Vanillin

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从《李娃传》看杜十娘悲剧的原因

山西师大学报（社会科学版） 2007年第4期34卷 93-96页

作者：温秋凤深圳广播电视大学中文系深圳518057

以《李娃传》作为参照,可以看出杜十娘产生悲剧的原因:她追求人身的自由和生活幸福,最后却"怒沉百宝箱"投水自杀。与唐代李娃成功帮助荥阳郑生走上仕途,从而也为自己创造了美满的婚姻家庭相比,杜十娘为自己所设定的解放的目标太低,所依... 详细信息

以《李娃传》作为参照,可以看出杜十娘产生悲剧的原因:她追求人身的自由和生活幸福,最后却"怒沉百宝箱"投水自杀。与唐代李娃成功帮助荥阳郑生走上仕途,从而也为自己创造了美满的婚姻家庭相比,杜十娘为自己所设定的解放的目标太低,所依托的李甲太懦弱,这是她悲剧产生的主要原因;而明代社会封建礼教加强,特别注重女子的贞操问题,已无唐代社会的宽松,仕宦家庭不可能接受一个从良的妓女,也是杜十娘悲剧产生的重要原因。

关键词：杜十娘悲剧李甲社会

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我国物流人才现状及培训需求策略分析

物流技术 2009年第11期28卷 268-271页

作者：冯乃秋汪新锋冯文秋河北科技师范学院工商管理学院河北秦皇岛066004 北京电子科技职业学院北京100026 河北科技师范学院欧美学院河北秦皇岛066004

通过对我国物流企业专业人才存量和供需矛盾的分析,总结出物流专业人才培养策略应主要放在企业培训与开发上。尤其是在金融危机环境下,更好地制定人才培训与开发策略,对企业的发展与成功起着决定性作用。

关键词：物流人才人才存量需求分析培训与开发策略

早期连续性血液净化联合腹腔微创穿刺引流对重症急性胰腺炎腹内压、肝功能及炎症因子的影响

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中国现代医学杂志 2022年第9期32卷 91-96页

作者：丘文凤廖金明吴洁柯纯华梅州市人民医院急诊重症医学科广东梅州514000

目的探讨早期连续性肾脏替代治疗(CRRT)联合腹腔微创穿刺引流对重症急性胰腺炎(SAP)患者腹内压(IAP)、肝功能及炎症因子的影响。方法回顾性分析2015年1月—2019年12月梅州市人民医院收治的86例SAP患者的临床资料,根据治疗方式分为两组:... 详细信息

目的探讨早期连续性肾脏替代治疗(CRRT)联合腹腔微创穿刺引流对重症急性胰腺炎(SAP)患者腹内压(IAP)、肝功能及炎症因子的影响。方法回顾性分析2015年1月—2019年12月梅州市人民医院收治的86例SAP患者的临床资料,根据治疗方式分为两组:采取CRRT治疗的患者为对照组(48例);采取CRRT联合腹腔微创穿刺引流术的患者为观察组(38例)。比较两组治疗前后IAP、肝功能[天门冬氨酸氨基转移酶(AST)、丙氨酸氨基转移酶(ALT)、总胆红素(TBIL)、γ-转肽酶(γ-GT)]、炎症因子[降钙素原(PCT)、C反应蛋白(CRP)、白细胞介素-6(IL-6)]水平,以及急性生理学和慢性健康状况评分系统Ⅱ(APACHEⅡ)评分。比较两组治疗前后炎症指标(PCT、CRP、IL-6)。比较两组治疗及康复情况。结果治疗前后观察组的IAP、血清AST、ALT、TBIL、γ-GT、PCT、CRP、IL-6及APACHEⅡ评分的差值高于对照组(P<0.05)。与对照组比较,观察组的机械通气时间、腹内高压(IAH)持续时间、白细胞计数(WBC)复常时间、器官功能障碍持续时间、住院时间缩短(P<0.05)。观察组多器官功能障碍综合征(MODS)发生率低于对照组(68.43%VS 32.25%)(P<0.05)。结论早期CRRT联合腹腔微创穿刺引流术能够降低SAP患者的IAP及炎症反应,降低MODS发生风险,保护肝功能,促进病情康复。

关键词：重症急性胰腺炎连续性肾脏替代治疗腹腔微创穿刺引流腹内压肝功能炎症反应

Regulating the oxygen-atom configuration of carbon anode enabling extremely fast-charging potassium-ion hybrid capacitors

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Nano Research 2025年第1期18卷 373-381页

作者： Daping qiu Yuehui Wang Lulu Zhang Hang Lei Haizhou Ying Jin Niu Min Li Xuelin Yang feng Wang Ru Yang Hubei Provincial Collaborative Innovation Center for New Energy Microgrid College of Electrical Engineering and New EnergyChina Three Gorges UniversityYichang 443002China State Key Laboratory of Chemical Resource Engineering Laboratory of Electrochemical Process and Technology for MaterialsBeijing University of Chemical TechnologyBeijing 100029China College of Materials and Chemical Engineering China Three Gorges UniversityYichang 443002China

Metal-ion hybrid capacitors,such as potassium-ion hybrid capacitors(PIHCs),are regarded as promising fast-charging energy storage ***,the kinetics mismatch between the battery anode and the capacitive cathode restricts their fastcharging *** constructing carbon anodes with enhanced kinetics is an innovative approach to address this ***,using epigallocatechin gallate with high oxygen content as the precursor,oxygen-enriched carbon materials(OEC)with tunable C=O content are successfully ***,the C=O content of OEC is regulated by adjusting the pyrolysis *** as an anode for PIHCs,OEC-600 with the highest C=O content exhibits an attractive fast-charging specific capacity of 135.2 mAh·g^(-1)at 20 A·g^(-1),along with a superior fast-charging cycling *** theoretical calculations,comprehensive kinetics analysis and in-situ Raman,the positive effects of C=O on the potassium storage capability and reversibility of OEC-600 are ***,PIHCs assembled based on an OEC-600 anode deliver impressive energy/power density of 145.1 Wh·kg^(-1)/45.9 kW·kg^(-1)and superior fast-charging cycling stability with 87.5%of capacity retention over 20,000 cycles at 5 A·g^(-1).This work is anticipated to provide an optional design concept toward the carbon anode for fast-charging PIHCs.

关键词： carbon anode oxygen epigallocatechin gallate potassium-ion hybrid capacitor

邻苯二甲酸二丁酯分子印迹聚合物的制备及性能研究

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应用化工 2013年第8期42卷 1451-1453页

作者：文峰球潘浪胜湘潭大学化工学院湖南湘潭411105

以邻苯二甲酸二丁酯(DBP)为模板分子,甲基丙烯酸(MAA)为功能单体,乙二醇二甲基丙烯酸酯(EGD-MA)为交联剂,采用沉淀聚合法制备了分子印迹聚合物。通过静态平衡结合法和Scatchard分析法,研究了分子印迹聚合物的识别性能和结合能力。结果表... 详细信息

以邻苯二甲酸二丁酯(DBP)为模板分子,甲基丙烯酸(MAA)为功能单体,乙二醇二甲基丙烯酸酯(EGD-MA)为交联剂,采用沉淀聚合法制备了分子印迹聚合物。通过静态平衡结合法和Scatchard分析法,研究了分子印迹聚合物的识别性能和结合能力。结果表明,该分子印迹聚合物对模板分子DBP具有较强的吸附特性和很好的选择性,其识别因子可达4.19。Scatchard分析表明,印迹聚合物微球存在2类不同的结合位点。高结合位点的平衡离解常数Kd1=0.078 mg/L,最大表观结合量Qmax1=53.03 mg/g;低结合位点的离解常数Kd2=0.023 mg/L,最大表观结合量Qmax2=33.95 mg/g。

关键词：邻苯二甲酸二丁酯分子印迹沉淀聚合