检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

纳米纤维膜与涤棉织物的复合研究

棉纺织技术 2023年第1期51卷 32-37页

作者：鲍泽霖余景红冯智敏李庭晓辛斌杰上海工程技术大学上海201620

为解决纳米纤维膜单独使用时强度不足的问题,提高其耐用性,研究聚乙烯醇/壳聚糖(PVA/CS)纳米纤维膜与涤棉织物的复合技术。采用海藻酸钠和壳聚糖溶液对涤棉织物进行聚电解质层层自组装技术(LBL)处理,以嵌入一定量的CS,用Super77黏合处... 详细信息

为解决纳米纤维膜单独使用时强度不足的问题,提高其耐用性,研究聚乙烯醇/壳聚糖(PVA/CS)纳米纤维膜与涤棉织物的复合技术。采用海藻酸钠和壳聚糖溶液对涤棉织物进行聚电解质层层自组装技术(LBL)处理,以嵌入一定量的CS,用Super77黏合处理过的涤棉织物与PVA纳米纤维膜,再在该黏合层上通过静电纺丝复合PVA/CS纳米纤维膜功能层。测试了复合织物的表面形貌、结构、断裂强力及透气量等性能,结果表明:LBL处理工艺为海藻酸钠质量分数1.0%、CS质量分数2.0%、4次浸透,组装效果好;功能层PVA/CS纳米纤维膜纤维形态良好;黏合层法制备的纳米纤维膜与涤棉复合织物透气量为29.6 mm/s,经向平均断裂强力484.31 N,经向断裂伸长率27.8%,复合织物黏合均匀、平整。认为:制备的复合织物机械性能良好,制备方法简单,原料无毒性,在抗菌和过滤材料领域具有应用潜力。

关键词：涤棉织物层层自组装技术聚乙烯醇/壳聚糖纳米纤维膜静电纺丝复合织物强力

维普期刊数据库博看期刊

Role of iron ore in enhancing gasification of iron coke:Structural evolution,influence mechanism and kinetic analysis

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 58-69页

作者： Jie Wang Wei Wang Xuheng Chen Junfang bao Qiuyue Hao Heng Zheng Runsheng Xu School of Chemistry and Materials Science Hubei Engineering UniversityXiaogan 432000China Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081China Institue of Ironmaking Technology Baosteel Central Research InstituteShanghai 201999China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

The utilization of iron coke provides a green pathway for low-carbon *** uncover the influence mechanism of iron ore on the behavior and kinetics of iron coke gasification,the effect of iron ore on the microstructure of iron coke was ***,a comparative study of the gasification reactions between iron coke and coke was conducted through non-isothermal thermogravimetric *** findings indicate that compared to coke,iron coke exhibits an augmentation in micropores and specific surface area,and the micropores further extend and *** provides more adsorption sites for CO_(2) molecules during the gasification process,resulting in a reduction in the initial gasification temperature of iron *** the heating rate in non-isothermal gasification can enhance the reactivity of iron *** metallic iron reduced from iron ore is embedded in the carbon matrix,reducing the orderliness of the carbon structure,which is primarily responsible for the heightened reactivity of the carbon *** kinetic study indicates that the random pore model can effectively represent the gasification process of iron coke due to its rich pore ***,as the proportion of iron ore increases,the activation energy for the carbon gasification gradually decreases,from 246.2 kJ/mol for coke to 192.5 kJ/mol for iron coke 15wt%.

关键词： low-carbon ironmaking iron coke gasification structural evolution kinetic model

Boosting Oxygen Evolution Reaction Performance on NiFe‑Based Catalysts Through d‑Orbital Hybridization

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第1期17卷 281-292页

作者： Xing Wang Wei Pi Sheng Hu Haifeng bao Na Yao Wei Luo State Key Laboratory of New Textile Materials and Advanced Processing Technology Key Laboratory of New Textile Materials and Applications of Hubei ProvinceSchool of Materials Science and EngineeringWuhan Textile UniversityWuhan 430200People’s Republic of China College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072People’s Republic of China

Anion-exchange membrane water electrolyzers(AEMWEs)for green hydrogen production have received intensive attention due to their feasibility of using earth-abundant NiFe-based *** introducing a third metal into NiFe-based catalysts to construct asymmetrical M-NiFe units,the d-orbital and electronic structures can be adjusted,which is an important strategy to achieve sufficient oxygen evolution reaction(OER)performance in ***,the ternary NiFeM(M:La,Mo)catalysts featured with distinct M-NiFe units and varying d-orbitals are reported in this *** and theoretical calculation results reveal that the doping of La leads to optimized hybridization between d orbital in NiFeM and 2p in oxygen,resulting in enhanced adsorption strength of oxygen intermediates,and reduced rate-determining step energy barrier,which is responsible for the enhanced OER *** critically,the obtained NiFeLa catalyst only requires 1.58 V to reach 1 A cm^(−2) in an anion exchange membrane electrolyzer and demonstrates excellent long-term stability of up to 600 h.

关键词： NiFe-based catalysts d-orbital coupling Oxygen evolution reaction Anion exchange membrane electrolyzer

聚乙烯醇/壳聚糖纳米纤维复合织物的制备及性能

在线全文

学校读者我要写书评

暂无评论

上海纺织科技 2022年第1期50卷 32-36页

作者：鲍泽霖杨凯马少梅余景红冯智敏李庭晓辛斌杰上海工程技术大学纺织服装学院上海201620

利用静电纺丝方法制备了聚乙烯醇(PVA)/壳聚糖(CS)纳米纤维膜,与涤棉混纺基布复合并进行拒水整理,制备出具有一定抗水溶性和抗菌性的复合织物,并分析复合织物的微观形貌及相关物理机械性能。研究表明:PVA质量分数为12%、CS质量分数为0.5... 详细信息

利用静电纺丝方法制备了聚乙烯醇(PVA)/壳聚糖(CS)纳米纤维膜,与涤棉混纺基布复合并进行拒水整理,制备出具有一定抗水溶性和抗菌性的复合织物,并分析复合织物的微观形貌及相关物理机械性能。研究表明:PVA质量分数为12%、CS质量分数为0.5%的纺丝液在纺丝电压为25 kV、接收距离为25 cm时纤维具有较好的可纺性,使用涂抹蜂蜜法复合的纳米纤维膜复合织物具有良好的性能。扫描电子显微镜观察纤维膜外貌形态发现,GA交联时间8 h时效果最好。机械性能测试结果表明,复合织物相比原基布平均断裂强力提高14%,平均断裂伸长提高7%。FT-IR测试表明,复合织物交联整理后羟基基团减少,具有更好的拒水性。TG测试表明,交联整理后复合织物在300℃时热稳定性有所提升。制备的PVA/CS纳米纤维复合织物兼具CS天然抗菌效果与纳米纤维膜孔径小的特点。

关键词：聚乙烯醇壳聚糖纳米纤维复合织物静电纺丝物理性能

共沉淀法制备Fe_3O_4粉末及其性能研究

在线全文

学校读者我要写书评

暂无评论

沈阳理工大学学报 2015年第5期34卷 7-11,18页

作者：刘瑞萍赵海涛刘状王飞鲍则琳关文超沈阳理工大学材料科学与工程学院辽宁沈阳110159

以Fe Cl3·6H2O和Fe Cl2·7H2O为反应试剂,油酸作为修饰剂,利用共沉淀法制备了Fe3O4粉末。改变油酸的用量、p H值及反应温度可以对产物的粒径、形貌和分散性产生影响。通过X衍射仪(XRD),扫描电子显微镜(SEM)和振动样品磁强计(VSM)对样... 详细信息

以Fe Cl3·6H2O和Fe Cl2·7H2O为反应试剂,油酸作为修饰剂,利用共沉淀法制备了Fe3O4粉末。改变油酸的用量、p H值及反应温度可以对产物的粒径、形貌和分散性产生影响。通过X衍射仪(XRD),扫描电子显微镜(SEM)和振动样品磁强计(VSM)对样品的结构、形貌和磁性能进行了表征。结果表明:在一定范围内提高p H值、降低反应温度以及增加油酸的加入量可以改善颗粒的分散性,窄化粒径分布。实验的最佳工艺参数:p H=9,T=50℃,油酸的质量为3.76g,该实验条件下制备的Fe3O4在室温下具有较小的矫顽力和剩磁,表现出超顺磁性,其饱和磁化强度为50.22emu/g。

关键词：共沉淀法Fe304 磁性能

Posttraumatic stress symptoms among Chinese university students during the COVID-19 pandemic:Prevalence,correlates,and mental health help-seeking

在线全文

学校读者我要写书评

暂无评论

World Journal of Psychiatry 2025年第1期15卷 145-152页

作者： Rui-Yao Wu Lin-Feng Ge bao-Liang Zhong Department of Psychiatry The Affiliated Wuhan Mental Health CenterTongji Medical College of Huazhong University of Science&TechnologyWuhan 430012Hubei ProvinceChina Department of Psychiatry Wuhan Mental Health CenterWuhan 430012Hubei ProvinceChina

BACKGROUND Revisiting the epidemiology of posttraumatic stress symptoms(PTSSs)among university students during the coronavirus disease 2019(COVID-19)pandemic as well as understanding the mental health help-seeking behavior of individuals with PTSSs has critical implications for public mental health strategies in future medical *** To investigate the prevalence and correlates of PTSSs among university students during the first wave of the COVID-19 pandemic in China and to examine mental health help-seeking behaviors among these *** A total of 2507 Chinese university students were recruited via snowball *** students completed the Seven-item Screening Scale for Post-traumatic Stress Disorder during the first wave of the COVID-19 pandemic in ***-graphic characteristics,pandemic-related characteristics,and mental health help-seeking behaviors of students with PTSSs were also *** The prevalence of PTSSs among the participants was 28.0%.Seven significant correlates of PTSSs were identified(odds ratio=1.23-3.65,P≤0.024):Female sex,being 19 years old or older,living with others or alone,a low level of family economic status,fair or poor interpersonal relationships,severe or very severe local pandemic,and having family members diagnosed with ***,only 3.28%of the students with PTSSs reported seeking help from mental health *** the 23 students who sought help from mental health specialists,13 opted for online or telephone-based psychological *** Our data suggest that there was a high risk of PTSSs among university students and a high level of unmet mental health needs during the COVID-19 *** delivery of mental health services online or via telephone is a promising approach to address these unmet needs.

关键词： Posttraumatic stress symptoms University students COVID-19 Mental health help-seeking China

De novo synthesis of atropisomeric benzofurans via Cu/SPDO complex catalyzed asymmetric formal [3 + 2] annulation

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第01期 174-180页

作者： Fan-Xiao Meng Xing-Yu Wang Ka Lu Ju-Song Yang Fu-Min Zhang Ai-Jun Ma bao Du Yong-Qiang Tu State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University School of Chemistry and Chemical Engineering Shanghai Jiao Tong University School of Biotechnology and Health Sciences Wuyi University

Herein, the de novo synthesis of atropisomeric benzofurans through the Cu/spirocyclic-pyrrolidine-oxazoline(SPDO) complex catalyze asymmetric formal [3 + 2] cycloaddition between quinones and ynamides is explored, producing a range of structurally diverse axially chiral benzofurans in satisfactory yields with good to excellent enantioselectivities. Furthermore, density functional theory calculations were applied to explain the possible reaction mechanism.

关键词：

Literature study on traditional Chinese medicine syndromes after renal transplantation

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

World Journal of Transplantation 2025年第1期15卷 150-155页

作者： Yun-Peng Guo Ling-Xue bao Yu-Yang Wang Quan Wen Gai Hang Bo Chen Tongliao Clinical Medical College Inner Mongolia Medical UniversityTongliao 028000Inner Mongolia Autonomous RegionChina Department of Urology Tongliao People's HospitalTongliao 028000Inner Mongolia Autonomous RegionChina

BACKGROUND Kidney transplantation is the most effective means to treat patients with renal failure,but its postoperative problems such as rejection reactions,immunosuppressant poisoning,chronic transplant kidney nephropathy,*** have not been effectively *** study searched for literature on traditional Chinese medicine(TCM)syndromes after kidney transplantation in China,conducted statistical analysis of the results,and sought to identify the underlying *** To understand the TCM syndromes after renal transplantation and associated rules and provide a theoretical basis for further clinical *** The literature pertaining to TCM syndromes in renal transplantation,published in the China National Knowledge Infrastructure,Wanfang database,and WIP database from 1970 to 2021,was meticulously searched and comprehensively and statistically *** Following the established inclusion and exclusion criteria,13 studies were selected for ***-renal transplantation,no significant discrepancy was noted among the groups based on the location of TCM ***,when categorized according to TCM pathogenic factors,the groups with spleen and kidney yang deficiency,as well as liver and kidney yin deficiency,exhibited a statistically significant difference in the *** Currently,the research on TCM syndromes pertaining to renal transplantation is in its nascent *** is imperative to conduct a multicentric,large-scale survey of TCM syndromes subsequent to renal transplantation in the ensuing years.

关键词： Kidney transplantation Syndrome Literature analysis Traditional Chinese medicine Systematic review

Systemic thrombosis with prothrombin Belgrade mutation in a Chinese patient:A case report

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2025年第10期13卷 35-39页

作者： Yan-Feng Wu Yan Huang bao-Hui Weng Shan Deng Li-Ya Pan Zhen Li Department of Neurology Liuzhou Worker’s HospitalLiuzhou 545007Guangxi Zhuang Autonomous RegionChina Department of Neurology Tianjin Medical University General HospitalTianjin 300052China

BACKGROUND Thrombophilia contributes to a significant increased risk of venous thromboembolism and can be either inherited or *** thrombophilia may arise from various gene mutations,some of which have not even been adequately reported or poorly *** studies reported a rare and novel missense mutation in the prothrombin gene(***596Gln),known as prothrombin *** mechanisms and therapeutic strategies associated with prothrombin Belgrade mutation have not been fully *** SUMMARY We present the case of a 26-year-old woman with recurrent systemic thrombosis induced by prothrombin Belgrade *** patient suffered from cerebral venous sinus thrombosis that rapidly progressed to systemic thrombosis,alongside a family history of cerebral thrombosis,and no traditional risk factors or abnormal coagulation ***-genome sequencing detected a novel and rare heterozygous prothrombin missense mutation,c.1787G>T(***596Gln),which was responsible for the major etiology of the systemic *** This case strengthens our understanding about hereditary basis of thrombophilia and provokes considerations for therapeutic options on prothrombin Belgrade mutation.

关键词： Arg596Gln Belgrade mutation Thrombophilia Prothrombin Case report