检索结果-南通市图书馆

halogen-free Polymer Donors Based on 3,4-Dicyanothiophene for High-performance Polymer Solar Cells

Chinese Journal of Polymer Science 2022年第8期40卷 905-913,I0008页

作者： Yun-Li Zhao Yue Zhang Xi-Yue Yuan Wan-Yuan Deng Bo Zhang Shu-Ting Pang Bing-Yan Yin Hong-Bin Wu Kai-Wen Lin Zhi-Tian Liu Chun-Hui Duan Fei Huang Yong Cao Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhou510640China Hubei Engineering Technology Research Center of Optoelectronic and New Energy Materials Wuhan Institute of TechnologyWuhan430205China Department of Materials and Food University of Electronic Science and Technology of China Zhongshan InstituteZhongshan528402China

Polymer solar cells(PSCs)consisting of a polymer donor and a small molecular acceptor is a promising photovoltaic technology,whose device performance is determined by both polymer donor and small molecular *** atoms such as fluorine or chlorine atoms were usually introduced onto the polymer donors to downshift the highest occupied molecular orbital(HOMO)energy levels and improve the open-circuit voltage(VOC)of the ***,the introduction of the halogen atoms especially fluorine atoms greatly complicates the polymer ***,we report the use of a structural simple and easily synthesized building block,3,4-dicyanothiophene(DCT),to construct a set of halogen-free polymer donors PBCNTx(x=25,50,75)via ternary random *** introduction of DCT units not only simplified the synthesis,but also downshifted the HOMO energy levels of the polymers and improved the V_(OC) of PSCs ***,the PBCNT75 afforded a power conversion efficiency up to 15.7%with a V_(OC) of 0.83 V,which are among the top values for halogen-free polymer *** work shows that the introduction of DCT units is a simple yet effective strategy to construct halogen-free and low-cost polymer donors for high-performance PSCs.

关键词： Polymer solar cells Polymer donors halogen-free Open-circuit voltage Energy loss

来源：

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

Physicochemical and tribological properties of gemini-type halogen-free dicationic ionic liquids

引用

Friction 2021年第2期9卷 344-355页

作者： Qiangliang YU Chaoyang ZHANG Rui DONG Yijun SHI Yurong WANG Yanyan BAI Jiaying ZHANG Meirong CAI Feng ZHOU Weimin LIU State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Lubricating Oil Key Laboratory of Petro China Lanzhou Lubricating Oil Research&Development Institute of Petro ChinaLanzhou 730060China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Division of Machine Elements LuleåUniversity of TechnologyLuleå97187Sweden

A series of new halogen-free dicationic ionic liquids(ILs)with different alkyl chain lengths were prepared,and the relationship between the alkyl chain length,physicochemical and tribological properties of ILs,and their role as neat lubricant for steel–steel friction pairs,was *** of stability during hydrolysis and copper strip corrosion test results show that synthetic ILs are stable and not corrosive to metal contacts,due to the halogen-free *** friction and wear test results indicate that ILs with long alkyl chains have excellent friction-reducing and anti-wear properties,especially at high *** on the surface three-dimensional(3D)profiles,electrical contact resistance,scanning electron microscopy(SEM),energy dispersive X-ray spectroscopy(EDS),and the X-ray photoelectron spectrometry(XPS)analysis of the worn surfaces of steel discs,we can conclude that the efficiency of ILs is due to the formation of high quality tribofilms that consist of both tribochemical reaction and ordered absorption films.

关键词： halogen-free dicationic ionic liquids(ILs) lubricant tribofilm

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Risk Points of Flame Retardant Textiles by halogen and halogen-free Laminating Film

引用

Materials Sciences and Applications 2014年第11期5卷 830-836页

作者： Yoon Jeong Baek Jeoung Hwa Shin Department of Textiles Merchandising and Fashion Design Seoul National University Seoul Korea Seoul Center Korea Basic Science Institute Seoul Korea

This study was to develop the flame retardant (FR) protective clothing which had multifunction such anti-bacterial, UV cut, FR function with water repellent and water vapor permeable laminating textiles for industrial workers. First of all, the FR yarn and FR textiles were developed for this purpose. Second, the comparison analysis between the halogen laminating textiles and halogen-free laminating textiles were tested to figure out the eco-friendly laminating method. Third, the flame retardant ability was compared the halogen laminated textiles to halogen-free laminated textiles. LOI, UV protection ratio, antibiosis after 50 laundry test, water proof pressure, and moisture permeability of developed textiles were tested. GC-HR-TOF-MS was used for analysis of laminating film (halogen and halogen-free). 4.1 wt% TiO2 yarn showed antibacterial function (Pneumococcus & Staphylococcus aureus: 99.9%), UV Protection (UVA: 90.8, UVB: 92.1), and LOI (33.6). The chosen optimal compounding ratio for PU compound of HRF and HFFR were as followed: PU resin 58.3%, DMF (Dimethyl formamide, δ = 12.2) 8.3%, MEK (Methylethylketone) 8.3% and FR (flame retardants) 25.0%. Binder for laminating should not be included over 10% of FRs because of adhesion between textiles and FR laminating film. There were detected phosphorus compounds in the textiles treated by halogenated type flame retardants and halogenated-free type flame retardants. There were not any detected harmful compounds from all textile samples.

关键词： Flame Retardant Yarn Flame Retardant Textiles GC-HR-TOF-MS halogen Laminating Textiles halogen-free Laminating Textiles

来源：

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

Environmental Assessment of halogen-free Printed Circuit Boards,A Design for Environment (DfE) Project with the High Density Packaging User Group (HDPUG)

Environmental Assessment of Halogen-Free Printed Circuit Boa...

引用

2007中国科协年会

作者： Scott O’Connell Allen Whitley Ruben Bergman Todd Brady John Burkitt Steve Ching Arthur Fong Dell HDPUG Intel HP IBM

Rostrictions on the use of halogenated flame retardant materials in IT products are baing considered due to environmental ***,little information exists involving trio potential environmental impacts of halogen-free materials which are being devoloped as alternatives to traditional brominated flame *** primary driver cited for use of halogen-free materials is to eliminato the potential for dioxin/furan formation during incineration at end of life,however the environmontal footprint of a material is not solely defined by end of life *** impacts occur throughout the life cycle of a material,from development and manufacture,through product use and finally at end of life. The results of this study include an environmental assessment of seven halogen-free flame retardants and one high-volume haloganated flama retardant,tetrabromobisphenol *** flame retardant material was evaluated on the basis of the toxicity of the raw material,potential environmental impacts during use and end of life and incineration and/or degradation *** on the available literature data,a relative ranking was applied to compare the strengths and weaknesses of each flame retardant *** research is recommended to develop a more comprehensive environmental profile for both halogenated and halogen-free flame retardant matarials.

关键词： halogen-free flame retardants printed circuit board

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

新型无卤阻燃高分子泡沫材料的研究

新型无卤阻燃高分子泡沫材料的研究

引用

2012年全国高分子材料科学与工程研讨会

作者：王琪陈学郭丹白时兵刘渊李莉高分子材料工程国家重点实验室（四川大学）四川大学高分子研究所

＜正＞高分子泡沫材料在国民经济重要领域如建筑节能保温等有广泛应用。但高分子泡沫材料的化学组成以碳、氢元素为主,易燃烧,氧指数很低,其本体阻燃即很难,而高分子泡沫材料是高分子与气体的固气复合材料,泡孔多、密度小、开孔率高、... 详细信息

＜正＞高分子泡沫材料在国民经济重要领域如建筑节能保温等有广泛应用。但高分子泡沫材料的化学组成以碳、氢元素为主,易燃烧,氧指数很低,其本体阻燃即很难,而高分子泡沫材料是高分子与气体的固气复合材料,泡孔多、密度小、开孔率高、泡孔壁薄、比表面积大且内含高达98%的助燃气体空气,使其比本体材料更易燃烧,更难阻燃。近年来,因建筑外墙保

关键词： halogen-free Flame retardant Polymer foams Expendable polystyrene foam Poly(vinyl alcohol) foam

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：