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Journal of Wuhan University of Technology(Materials Science) 2012年第6期27卷 1061-1067页

作者：吴松全 LIU Shaozhu 刘宇艳 ZHU Qi wei huige School of Chemical Engineering and Technology Harbin Institute of Technology

The thermal stability of latent resin systems, cycloaliphatic epoxy/4,4＇- dihydroxydiphenylsulfone/aluminum complexes, was investigated by dynamic differential scanning calorimetry （DSC） analysis. Experiments were conducted under non-isothermal condition in a nitrogen atmosphere at the heating rate of 10, 20, 30 and 40 ℃/min, respectively. TG curves showed that, in the temperature range of 25 to 600 ℃, the stability of the resin systems could be enhanced by increasing the length of the aliphatic chain in the initiator. Both the Kissinger method and the Ozawa-Flyrm-Wall method were employed to calculate activation energies of the decomposition reaction, and the values obtained from the two methods were compared. Moreover, the corresponding reaction mechanism was identified by the Achar differential method and the Coats- Redfem integral method. The experimental results showed that these four methods were reliable and effective to study the kinetics of the thermal decomposition reaction; and the most probable thermal decomposition mechanism of the resin systems we proposed was found to comply with Mampel power law （m=1）.

关键词： epoxy resin aluminum complex phase separation thermal decomposition

生物质基多级孔活性炭-聚苯胺复合材料的合成及其电化学储能性能

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复合材料学报 2022年第8期39卷 4028-4036页

作者：韦会鸽彭紫芳陈安利李桂星崔大鹏王晖天津科技大学化工与材料学院绿色能源实验室天津300457

为制备高性能、低成本的储能器件,本文通过简单的一步原位化学聚合的方法制备了生物质基多级孔活性炭-聚苯胺复合材料(HAC-PANI),并探讨了其在超级电容器(SCs)及锌离子混合超级电容器(ZHSCs)领域的应用。研究结果表明,复合材料中HAC的... 详细信息

为制备高性能、低成本的储能器件,本文通过简单的一步原位化学聚合的方法制备了生物质基多级孔活性炭-聚苯胺复合材料(HAC-PANI),并探讨了其在超级电容器(SCs)及锌离子混合超级电容器(ZHSCs)领域的应用。研究结果表明,复合材料中HAC的分级多孔结构和高的比表面积为PANI提供了生长位点,有效减少了PANI的团聚现象,并能促进电化学储能过程中电解质离子的传输,降低界面电荷传递电阻。当HAC与苯胺单体(AN)的质量比为1∶2时,PANI纳米颗粒均匀生长在HAC基底上,所得复合电极材料(HAC-2PANI)的电化学储能性能达到最佳,在三电极体系下质量比电容高达415.6 F·g^(−1)(@1 A·g^(−1))。二电极体系下,基于HAC-2PANI的全固态超级电容器(s-HAC-PANI-SC)质量比电容为217.4 F·g^(−1)(@1 A·g^(−1))、能量密度为26.5 W·h·kg^(−1)、功率密度为1875.0 W·kg^(−1)。由于PANI中赝电容的引入,以HAC-2PANI为阴极、Zn箔为阳极所构建的锌离子混合超级电容器(HAC-PANI-ZHSC)在0.2 A·g^(−1)的电流密度下呈现出高的比容量(91.8 mA·h·g^(−1))、能量密度(64.3 W·h·kg^(−1))和功率密度(140.0 W·kg^(−1)),并具有良好的倍率性能和循环稳定性,表明了生物质基活性炭复合材料在高性能、低成本电化学储能器件中潜在的应用前景。

关键词：生物质基活性炭聚苯胺复合材料超级电容器金属离子混合超级电容器

聚苯胺-玉米苞叶纤维复合材料基柔性自支撑电极的制备及其电化学性能

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复合材料学报 2022年第7期39卷 3462-3468页

作者：韦会鸽李桂星雷祥楠彭紫芳孔德硕万同天津科技大学化工与材料学院绿色能源实验室天津300457

为满足可穿戴电子设备日益提升的要求,低成本、高性能柔性超级电容器成为研究的热点。在玉米苞叶纤维(CHF)基材表面原位生长聚苯胺(PANI),继而以聚乙烯醇/硫酸(PVA/H_(2)SO_(4))作为凝胶,通过简单的冻融法制备聚苯胺-玉米苞叶纤维柔性... 详细信息

为满足可穿戴电子设备日益提升的要求,低成本、高性能柔性超级电容器成为研究的热点。在玉米苞叶纤维(CHF)基材表面原位生长聚苯胺(PANI),继而以聚乙烯醇/硫酸(PVA/H_(2)SO_(4))作为凝胶,通过简单的冻融法制备聚苯胺-玉米苞叶纤维柔性自支撑电极(PANI-CHF-GEL)。PANI-CHF-GEL显示出优异的力学性能(断裂强度为259 kPa,断裂伸长率为121%)和较好的韧性(断裂能为0.167 MJ·cm^(-3))。采用PVA/H_(2)SO_(4)凝胶作为电解质组装得到的PANI-CHF-GEL//PANI-CHF-GEL对称固态超级电容器具有优越的电化学储能性能:在3.00 mA·cm^(-2)的电流密度下,面积比电容高达1789.74 mF·cm^(-2),功率密度为0.34 mW·cm^(-2),能量密度为3.51 mW·h·cm^(-2)。此外,该器件还显示出良好的柔性,弯曲90°时仍能保持其初始性能,表明了其在可穿戴电子设备潜在的应用前景。

关键词：玉米苞叶纤维聚苯胺复合材料柔性自支撑固态超级电容器电化学

聚乳酸基聚苯胺柔性可降解超级电容器的制备与性能

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复合材料学报 2022年第1期39卷 193-202页

作者：韦会鸽李桂星万同陈安利彭紫芳张欢天津科技大学化工与材料学院绿色能源实验室中国天津300457

随着全球经济的快速发展、化石燃料的枯竭及环境污染等问题的加剧,社会对新型的电化学储能技术的需求日趋迫切。近年来,超级电容器由于其高的功率密度、长的循环寿命、宽的工作温度、优异的稳定性等优势引起了广泛关注。但由于传统的电... 详细信息

随着全球经济的快速发展、化石燃料的枯竭及环境污染等问题的加剧,社会对新型的电化学储能技术的需求日趋迫切。近年来,超级电容器由于其高的功率密度、长的循环寿命、宽的工作温度、优异的稳定性等优势引起了广泛关注。但由于传统的电容器器件大而重、制造过程繁复、且大多数不能够降解,已经不能满足社会的可持续发展需要,因此制备一种新型柔性、环保的超级电容器迫在眉睫。本工作报道了以聚乳酸(PLA)薄膜为基底,在PLA表面原位化学聚合生长聚苯胺(PANI)制备聚苯胺-聚乳酸(PANI-PLA)可降解柔性超级电容器电极。采用SEM、FTIR、UV-Vis对电极进行形貌及结构的表征;继而对其电化学性能进行测试。测试结果显示,在三电极体系下,PANI-PLA的最大面积比电容可达到5.00 mF·cm^(-2)(@0.10 mA·cm^(-2))。在二电极体系下以聚乙烯醇/硫酸(PVA/H;SO;)作为凝胶电解质时,PANI-PLA//PANI-PLA对称固态超级电容器面积比电容为0.20 mF·cm^(-2),功率密度为3.60μW·cm^(-2),对应的能量密度为0.02μW·h·cm^(-2)(@0.004 mA·cm^(-2));聚苯胺-不锈钢(PANI-SS)//PANI-PLA不对称固态超级电容器面积比电容为23.33 mF·cm^(-2),功率密度为30.09μW·cm^(-2),对应的能量密度为1.17μW·h·cm^(-2)(@0.05 mA·cm^(-2))。

关键词：聚乳酸聚苯胺原位化学聚合生物可降解柔性固态超级电容器

聚丙烯酰胺基复合导电水凝胶在柔性压阻传感器领域中的应用

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电镀与精饰 2023年第10期45卷 53-58页

作者：冀彦秀宋振兴韦会鸽李拓天津科技大学化工与材料学院天津300457 天津科技大学理学院天津300457

柔性压阻传感器具有制备工艺简单、响应速度快、易于集成和低成本等优点,在医疗监测设备、智能机器人及可穿戴电子设备等领域备受关注。聚丙烯酰胺基导电水凝胶兼具柔韧性和导电性,使其在制备压阻传感器方面极具优势。为满足其在柔性压... 详细信息

柔性压阻传感器具有制备工艺简单、响应速度快、易于集成和低成本等优点,在医疗监测设备、智能机器人及可穿戴电子设备等领域备受关注。聚丙烯酰胺基导电水凝胶兼具柔韧性和导电性,使其在制备压阻传感器方面极具优势。为满足其在柔性压阻传感器领域的应用,往往通过设计复杂网络或引入特定分子结构赋予其相应功能。本文主要介绍利用聚丙烯酰胺基复合导电水凝胶制备柔性压阻传感器的研究进展,并对其发展趋势进行了展望。

关键词：水凝胶柔性压阻传感器健康监测

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基于微流控芯片技术的无创血糖监测综述

传感器与微系统 2023年第11期42卷 6-10页

作者：王玄烨禚文瀚崔悦悦胡满芳范雨薪韦会鸽天津科技大学化工与材料学院天津300170

近几年微流控芯片技术正逐步发展,在生物医学、化学分析、药物筛选等多个领域中具有较大的潜力。目前在血糖监测方面微流控芯片凭借其高通量、低消耗、快分析等特点得以应用。通过与不同技术集成,实现无创效果,还可与智能设备连接使得... 详细信息

近几年微流控芯片技术正逐步发展,在生物医学、化学分析、药物筛选等多个领域中具有较大的潜力。目前在血糖监测方面微流控芯片凭借其高通量、低消耗、快分析等特点得以应用。通过与不同技术集成,实现无创效果,还可与智能设备连接使得日常血糖管理更加简便。综述将从微流控芯片关键技术、在血糖监测上的应用以及相关产品研发现状3个方面对微流控芯片技术原理、集成方法、监测特点及研究进展进行总结,并展望未来的发展趋势。

关键词：微流控芯片血糖监测无创

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Recent advances in DNA glycosylase assays

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Chinese Chemical Letters 2022年第8期33卷 3603-3612页

作者： Lili Wang huige Zhang wei Chen Hongli Chen Jianxi Xiao Xingguo Chen State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou 730000China

Genomic deoxyribonucleic acid(DNA)is selected as the ideal carrier for preserving and transmitting the genetic information over the course of ***,the genomic DNA is constantly exposed to various endogenous and environmental threats,causing a diversity of damaged bases,lesions,mismatches and base-pair modifications in the genome,eventually leading to genomic instability and *** excision repair(BER)is the most important repair mechanism,repairing a variety of DNA damages arising from oxidation,alkylation,methylation,deamination,and hydrolysis *** glycosylases are responsible for initiating the first step of the BER pathway through cleaving the N-glycosidic bond between the damaged base and the DNA ***,abnormal DNA glycosylases are associated with a variety of diseases such as cancer,cardiovascular disease,neurological disease and inflammation,suggesting the important role of DNA glycosylases in cancer diagnosis and ***,it is highly desirable to monitor the activity of DNA glycosylases,gaining a deep understanding of the restoration process of damaged DNA and clinical ***,a series of novel DNA glycosylases detection methods with excellent performance have been *** this minireview,we summarize the recent advances in DNA glycosylase assays including amplification-free assay and amplification-assisted ***,a brief introduction of amplification-free assay for DNA glycosylase is ***,amplification-assisted assays for DNA glycosylases are discussed in ***,the conclusion and prospects of the directions of DNA glycosylase assays are provided.

关键词： DNA glycosylases Base excision repair Polymerase chain reaction Isothermal signal amplification Nanomaterial-based biosensors

Single-level dynamic spiral CT of hepatocellular carcinoma:Correlation between imaging features and density of tumor microvessels

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World Journal of Gastroenterology 2004年第1期10卷 67-72页

作者： wei-XiaChen Peng-QiuMin BinSong Bong-LiangXiao YanLiu Ying-huige DepartmentofRadiology WestChinaHospitalSichuanUniversityChengdu610041SichuanProvinceChina DepartmentofToxicologyandPathology SchoolofPublicHealthSichuanUniversityCh-engdu610041SichuanProvinceChina DepartmentofRadiology WestChinaHospitalSichuanUniversitynowworkinginRijinHospitalShanghaiChina DepartmentofRadiology WestChinaHospitalSichuanUniversitynowworkinginHenanProvinceHospitalHenanProvinceChina

AIM: To investigate the correlation of enhancement features of hepatocellular carcinoma (HCC) revealed by single-level dynamic spiral CT scanning (DSCT) with tumor microvessel density (NVD), and to determine the validity of DSCT in assessing in vivo tumor angiogenic activity of HCC. METHODS: Twenty six HCC patients were diagnosed histopathologically. DSCT was performed for all patients according to standard scanning protocol. Time-density curves were generated, relevant curve parameters were measured,and gross enhancement morphology was analyzed. Operation was performed to remove HCC lesions i to 2 weeks following CT scan. Histopathological slides were carefully prepared for the standard F8RA immunohistochemical staining and tumor microvessel counting. Enhancement imaging features of HCC lesions were correlatively studied with tumor MVD and its intra-tumor distribution characteristics. RESULTS: On DSCT images of HCC lesions, three patterns of time-density curve and three types of gross enhancement morphology were recognized. Histomorphologically, the distribution of positively stained tumor endothelial cells within tumor was categorized into 3 types. Curve parameters such as peak enhancement value and contrast enhancement ratio were significantly correlated with tumor tissue MVD (/=0.508 and /=0.423, P<0.01 and P<0.05 respectively). Both the pattern of time-density curve and the gross enhancement morphology of HCC lesions were also correlated with tumor MVD, and reflected the distributive features of tumor microvessels within HCC lesions. Correlation between the likelihood of intrahepatic metastasis of HCC lesions with densely enhanced pseudocapsules and rich pseudocapsular tumor MVD was ***: Enhancement imaging features of HCC lesions on DSCT scanning are correlated with tumor MVD,and reflect the intra-tumor distribution characteristics of tumor microvessels. DSCT is valuable in assessing the angiogenic activity and tumor neovascularity of HCC patients

关键词：动态螺旋CT 肝细胞癌微血管密度影像学诊断

利益相关者视角下环境信息披露质量的影响因素

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管理评论 2016年第9期28卷 182-193页

作者：孔慧阁唐伟同济大学经济与管理学院上海201804

基于现有的环境信息披露指引以部分行业上市公司为例,采用面板回归的方法从利益相关者角度对环境信息披露现状及其影响因素进行研究。研究结果表明,环境法规指引下的环境信息披露质量虽逐步提升但整体水平较低;由于环境信息评价及审核... 详细信息

基于现有的环境信息披露指引以部分行业上市公司为例,采用面板回归的方法从利益相关者角度对环境信息披露现状及其影响因素进行研究。研究结果表明,环境法规指引下的环境信息披露质量虽逐步提升但整体水平较低;由于环境信息评价及审核体系并未建立,上市公司与利益相关者的环境信息交流机制存在失灵现象,经济利益和环境效益的平衡始终是企业抉择的难点,政策导向将会成为调整两者关系的新契机。

关键词：环境信息披露质量利益相关者促进因素抑制因素

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具有最大代数免疫阶的布尔函数的新构造

北京大学学报（自然科学版） 2010年第5期46卷 704-708页

作者：曹浩魏仕民卓泽鹏王会歌安徽科技学院理学院滁州233100 淮北师范大学淮北235000

针对密码学中布尔函数的构造需求,利用布尔函数的代数标准型,分析了布尔函数不存在次数低于m的非零零化子的充分条件,得到布尔函数达到最大代数免疫阶的条件,从而构造了一类具有最高代数免疫阶的布尔函数,并对所构造函数的平衡性和计数... 详细信息

针对密码学中布尔函数的构造需求,利用布尔函数的代数标准型,分析了布尔函数不存在次数低于m的非零零化子的充分条件,得到布尔函数达到最大代数免疫阶的条件,从而构造了一类具有最高代数免疫阶的布尔函数,并对所构造函数的平衡性和计数问题进行了分析。

关键词：布尔函数代数标准型代数免疫阶