基于香豆素荧光增白剂的高分子型光稳定剂的合成及应用EI北大核心CSCD

采用Pechmann法,在酸性条件下,乙酰乙酸乙酯和间苯二酚发生脱水缩合反应,生成了7-羟基-4-甲基香豆素荧光增白剂。用三聚氯氰作为"桥梁",将7-羟基-4-甲基香豆素和紫外线吸收剂2,4-二羟基-二苯甲酮引入同一分子中,再分别与聚乙二醇系列产品进行缩聚反应,合成了高分子型光稳定剂。采用红外光谱、核磁共振氢谱、紫外光谱、荧光光谱和紫外光加速老化实验对合成产物进行了结构表征、光学性质研究和应用效果考察。结果表明,经过48h光老化处理后,涂有香豆素荧光增白剂、荧光返黄单体及高分子型光稳定剂的纸张白度比空白纸样分别少下降了0.84ISO%、3.96ISO%、5.35ISO%,相比于传统的荧光增白剂和荧光返黄单体,合成的高分子型光稳定剂对纸张有更好的返黄抑制效果。     

高分子荧光增白型返黄抑制剂的合成及性能研究

以自由基捕获剂2,2’,6,6’-四甲基哌啶胺(4-氨基哌啶)替代其中一种氨基化合物,用三聚氯氰为交联单体,经过两步缩合反应得到双三嗪氨基二苯乙烯荧光增白型返黄抑制剂单体,再与聚乙二醇系列产品发生缩聚反应合成了新型结构高分子化荧光增白型返黄抑制剂。采用红外和核磁光谱等手段对其分子结构进行了表征,用紫外光谱、荧光光谱分析方法对其光学性质进行了初步研究,并通过紫外光加速老化实验考察了目标产物对化机浆纸张的返黄抑制效果。实验结果表明,在使用性能上,与荧光返黄单体及传统的荧光增白剂VBL相比,合成的高分子荧光增白型返黄抑制剂对纸张增白效果及光抑制效果更好,其结构稳定性、耐光性得到明显改善,同时对其紫外吸收性能及荧光量子产率也有显著的增加。     

基于香豆素荧光增白剂的高分子型光稳定剂的合成及应用

采用Pechmann法,在酸性条件下,乙酰乙酸乙酯和间苯二酚发生脱水缩合反应,生成了7-羟基-4-甲基香豆素荧光增白剂。用三聚氯氰作为"桥梁",将7-羟基-4-甲基香豆素和紫外线吸收剂2,4-二羟基-二苯甲酮引入同一分子中,再分别与聚乙二醇系列产品进行缩聚反应,合成了高分子型光稳定剂。采用红外光谱、核磁共振氢谱、紫外光谱、荧光光谱和紫外光加速老化实验对合成产物进行了结构表征、光学性质研究和应用效果考察。结果表明,经过48h光老化处理后,涂有香豆素荧光增白剂、荧光返黄单体及高分子型光稳定剂的纸张白度比空白纸样分别少下降了0.84ISO%、3.96ISO%、5.35ISO%,相比于传统的荧光增白剂和荧光返黄单体,合成的高分子型光稳定剂对纸张有更好的返黄抑制效果。     

含萘酰亚胺荧光聚合物的合成及对Pd2+识别研究

以4-溴-1,8-萘二甲酸酐为原料,经亚胺化、酯化等反应,设计合成了一种新的乙烯基荧光功能单体N-甲基丙烯酰氧乙基-4-溴-1,8-萘酰亚胺(NPMA),并用此单体与N-异丙基丙烯酰胺(NIPAAm)通过自由基聚合制备了荧光共聚物PⅠ、PⅡ和PⅢ.采用1H NMR(核磁共振氢谱)、UV-vis(紫外-可见)光谱和荧光光谱对共聚物的结构及性能进行了表征,结果表明聚合物对金属pd2+具有高灵敏度的选择性识别作用.     

1,8-萘酰亚胺类聚合荧光材料的合成及光学性能

以-4溴-1,8-萘二甲酸酐、二乙烯三胺（DETA）及三聚氯氰（CNC）为原料,经酰胺化、亲核取代反应合成了一种荧光单体,通过傅里叶变换红外光谱对其进行结构表征,并使其与丙烯酰胺按照一定比例聚合,得到一种能溶于水的聚合荧光材料。考察了荧光单体及聚合物的紫外可见吸收和荧光光谱,研究表明,聚合物的Δσ（3964 cm-1）...     

4种萘酰亚胺类荧光增白剂的合成及性能研究

以4-溴-1,8-萘二甲酸酐为原料,与端基含有氨基的伯胺(如苯胺)和自制1.0G PAMAM发生酰胺化反应得到4-溴-1,8-萘酰亚胺,将其C4-位的溴被甲氧基和乙氧基取代进而得到4种具有强烈荧光性能的萘酰亚胺类荧光增白剂.经FT-IR表征其结构,用UV-vis、荧光光谱等手段研究了它们在水溶液中光物理化学性质.结果表...     

可聚合8-羟基喹啉衍生物的合成及高分子化

5氯-甲基-8-羟基喹啉与烯丙醇反应,得到5-(烯丙氧)甲基-8-羟基喹啉可聚合单体,进一步与苯乙烯聚合,得到含8羟-基喹啉基团的高分子。将所得的聚合物与铝离子配位得到高分子配合物(最大发射波长为512 nm)。利用红外光谱、紫外光谱、核磁共振和原子力显微镜(AFM)对配体和配合物的结构进行了表征,利用荧光光谱研究了配合物的光致发光性能。     

可用于荧光检测硫化氢的希夫碱配合物的设计与合成

以1,8-萘二甲酸酐为起点,合成1,8-萘酰亚胺,通过亲核加成反应合成希夫碱配体,进而与铜离子络合得到配合物,采用核磁共振氢谱与傅立叶变换红外光谱对其进行了结构表征。考察了配合物与H2S气体反应前后紫外吸收光谱与荧光光谱的变化、浓度响应曲线、响应时间,响应在20s开始并于2min完成,检测极限达到1.68μmol/L。配合物对硫化氢有良好的荧光增强响应,具有响应快、灵敏度高、检测极限低的特点。     

2,4-己二炔-1,6-二乙基脲的合成及聚合反应

研究了一种时间-温度指示剂2,4-己二炔-1,6-二乙基脲的合成方法,用元素分析、飞行时间质谱、傅立叶变换红外光谱、激光拉曼光谱和核磁共振对其结构进行了表征,并采用光密度计、红外光谱和紫外光谱对其聚合过程进行了初步研究。结果表明,该化合物在紫外灯照射和加热两种条件下,均可以发生固相聚合反应,但在紫外灯照射下的聚合速率要比加热条件下快得多。随着聚合程度的增加,化合物的颜色逐渐由白色变为蓝色甚至黑色,并具有时间累积效应,可以作为时间-温度指示剂使用。     

纳米粒子改性二苯乙烯型荧光增白剂的制备及性能研究

以4,4’-二氨基二苯乙烯-2,2’-二磺酸(简称DSD酸)为荧光母体,利用三聚氯氰的交联反应,经过亲核取代将乙醇胺、3-氨基丙基三甲氧基硅烷(KH-540)与荧光母体连接起来,制备了一种荧光增白剂。然后将其作为原料,采用改进的stober水解法,制备出了含有二苯乙烯型荧光增白剂的SiO2荧光纳米复合粒子。利用红外光谱仪测定了其结构,用扫描电镜(SEM)、透射电镜(TEM)、纳米粒度分析仪、热重(TG)分别对其形貌和热稳定性进行了观察,用紫外-可见光谱、荧光光谱对产物的光物理化学进行了表征,并利用紫外老化实验考察了荧光纳米粒子对纸张的返黄抑制效果。结果表明,在使用性能上,相同量的荧光增白剂,用纳米粒子改性后其对纸张的增白效果及光抑制效果更好。     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Optimum-Simulation von Ernteprozessen

Zusammenfassung Bei der Gestaltung von Ernteprozessen — beispielsweise des Prozesses Mähdrusch, Körnertransport und -abnahme — als transportverbundene Fließarbeitsverfahren mit mindestens zwei verschiedenen Arbeitsmitteln gibt es einen großen Optimierungsspielraum. Solche Prozesse sind mehrstufige Bedienungsprozesse mit gemischter Anordnung der Bedienungseinrichtungen. Außerdem besitzen sie stark ausgeprägte räumliche Aspekte. Es wird vor allem gezeigt, welche Merkmale solcher Prozesse in Simulationsmodellen abgebildet sein müssen, welche Zielgrößen in Abhängigkeit von welchen Einflußgrößen unter Berücksichtigung welcher Prozeßbedingungen ermittelt werden sollten und wie der Bewertungsprozeß zur Ermittlung der gewünschten Informationen gestaltet werden muß.     

Brainstorming for ISO Strategy 2016-2020

正Responding to ISO’s appeal for survey for the to-be-developed ISO Strategy Plan for 2016-2020,SAC hosted a special workshop over the needs and comments of various fi elds on June 8 in Beijing.The workshop was attended by ISO President-elect and Ansteel General Manager Zhang Xiaogang,SAC Vice-Administrator Yu Xinli,and 30 experts from     

CNAS Passes APLAC's PTP Review

正The review group of Asia Pacific Laboratory Accreditation Cooperation(APLAC)carried out a 4-day peer review of the proficiency testing provider(PTP)for China National Accreditation Service for Conformity Assessment(CNAS)from July 28 to 31,2014.CNAS passed the PTP review with excellent performance.Two senior peer reviewers of APLAC made a comprehensive,rigorous and detailed review of CNAS’s PTP accreditation activities,and made the on-spot inspection of the review groups in Shanghai and Shenzhen respectively.     

新闻(英文)

正China and Greece Sign the Standardization Cooperation Agreement Witnessed by Chinese Premier Li Keqiang and Greek Prime Minister Antonis Samaras,AQSIQ Minister Zhi Shuping and ELOT Chairman and Executive Director Angelos Tolkas signed the SAC-ELOT Standardization Cooperation Agreement.The Agreement is one of the critical cooperation documents signed during Li Keqiang’s visit in Greece,encouraging China and Greece to     

Win-Win Cooperation

正The Chinese Premier Li Keqiang's recent trip to the UK has reinforced the China-UK comprehensive strategic partnership;just as the British Prime Minister David Cameron put it,"the relationship is gaining in strength,depth and understanding"after a bucket of business deals being inked worth more than 30 billion US dollars.From the first agreement signing in 2004 to the new agreement of mutual standards recognition and adoption in     

Systematic Approach for Emerging Industry

正A national directory of standards complexes for strategic emerging sectors was recently developed and released jointly by 12governmental departments,namely,SAC,NDRC,MOST,MIIT,MEP,MOA,AQSIQ,State Forest Administration,State Administration of Science and Technology for National Defense,State Oceanic Administration and National Railway Administration.     

Strictest Pollutants Emission Standards

正Four new national standards on air pollutant emission control offi cially issued by the Ministry of Environment Protection(MEP)together with AQSIQ and SAC has been brought into force from July 1,2014.The Emission standard for air pollutants of coal-burning,oil-burning and gasfi red boilers,which is the strictest emission standard historically,will tackle the stubborn pollution problem of boilers and waste incineration in most of China’s regions.     

Instructions to Authors

New Carbon Materials is a bimonthly journal published with the permission of the Ministry of Science and Technology and of the State News and Publication Agency.The journal is sponsored by the Institute of Coal Chemistry,Chinese Academy of Sciences,and is published by Science Press.Aims and Scope     

Progress on Standards Copyright Protection

正Recently,National Copyright Administration of China(NCAC)has rewarded 215 organizations and 179 individuals for their outstanding efforts on investigating standards copyright infringement and piracy in 2013.Hua Jianhua,the Deputy-Director of National Standards Copyright Protection Workgroup Office won a third prize of the national individual award.In 2012,SAC set up the national standards copyright protection working group,and developed policies to crack down standards infringement and piracy behaviors and to strengthen standards copyright protection.