共查询到18条相似文献,搜索用时 93 毫秒
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含稀土光学树脂的制备和性能研究 总被引:4,自引:0,他引:4
稀土高分子材料是通过稀土金属与高分子的复合而制备的一类兼具稀土光、电、磁等特性和高分子质轻、抗冲击和易加工等优良综合性能的功能材料。稀土高分子材料主要分为两大类型:一类是稀土化合物作为掺杂剂均匀分散到高分子的单体和聚合物中;第二类是稀土化合物以单体形式参与聚合或缩合以及稀土化合物配位在聚合物的侧链上获得的键合型稀土高分子材料。本文综述了国内外在稀土金属与高分子复合材料方面的研究进展及相关应用,介绍了本组在合成含稀土化合物和配合物光学树脂方面的研究情况,通过把稀土配合物复合到苯乙烯和甲基丙烯酸共聚体系中,获得了发光强度高、荧光寿命长、透光率高、机械性能好的光学树脂,并对今后工作方向进行了展望。 相似文献
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我们采用三种不同方法制备了含稀土化合物的光学树脂。第一种是含稀土甲基丙烯酸盐的透明树脂,第二种是采用直接掺杂法制备的含稀土配合物透明树脂,第三种是采用原位复合法制备的含稀土配合物透明树脂。通过对三种透明树脂的热稳定性、抗冲击性、紫外-可见吸收光谱、红外光谱、荧光光谱及核磁等方面的表征,结果表明获得的第二、第三种透明树脂具有非常好的透明性、发光性和相关物理机械性能,进一步比较三种透明树脂的发光性质发现第三种采用原位复合法制备的含稀土配合物透明树脂最好,这说明原位复合法是一种简便快捷合成透明荧光高分子材料的好方法。 相似文献
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以二硫化碳和金属钠为基础物质合成了四硫富瓦烯(TTF)锌的配合物(TTF)Zn(NBu4)2。利用该化合物与苯甲酰氯反应得到的稳定化合物C17H10O2S5在甲醇钠溶液中与2,3-二溴丙醇反应成功合成出目标化合物(一种新配体),其化学组成为C6H6OS5。利用IR谱、^1HNMR谱及元素分析对此化合物进行了表征。 相似文献
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基于光学临界慢变效应对光学双稳器件本文提出了一种新的功能——光学脉冲振幅调制(PAM)到光学脉冲持续时间调制(PDM)的转换,并且在实验上证实了这种功能的可行性. 相似文献
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Hongyan Wang Renguo Lv Zhongyuan Huang Pei Liu Peihong Cong 《Journal of Macromolecular Science: Physics》2016,55(1):85-98
Fluorine atoms were introduced into the molecular chain of a phenolic resin (PR) by a two-step acid synthesis process to improve its thermal and hydrophobic properties. The successful synthesis of a fluorinated phenolic resin/phenolic resin blend (F-PR/PR) was proven by Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance 19F (19F-NMR). The thermal properties of F-PR/PR were analyzed by differential scanning calorimetry (DSC) and thermo gravimetric analysis (TGA) and the results indicate that the F-PR/PR had good thermal stability. The hydrophobic properties of PR were effectively modified as demonstrated by the water drop contact angles. The flexural and tribological properties of F-PR/PR were also investigated. The fluorine atom, by virtue of its electronegativity, size and bond strength with carbon, can be used to create composites from F-PR/PR with remarkable properties. For comparison, two other resin blends were also synthesized. 相似文献
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Cadmium sulfide (CdS) nanostructured materials were synthesized by a wet chemical route without using any capping agent. X-ray diffraction pattern showed the typical interplanar spacings corresponding to the cubic phase of CdS. Transmission electron microscopy studies showed the nanowires formation with length in the range 0.1–1.5 μm and the diameter 25–30 nm. UV–visible optical spectroscopy study was carried out to determine the bandgap of the nanostructured CdS thin films and it showed blue shift with respect to the bulk value. Variation of band gap energies with annealing temperature was also studied in detail. Room temperature photoluminescence of the nano-CdS films was measured and the spectrum showed a broad band centered at ~567 nm, which originated from trap states existing in the forbidden energy gap. 相似文献
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一种准确聚焦掠入射球面光栅单色仪的光学设计 总被引:1,自引:0,他引:1
提出了一种用于低碎屑激光等离子体软X射线光谱测试的球面光栅单色仪的光学设计方案。其设计思想是通过改变衍射光栅的偏向角使入射狭缝在所要求的波段范围内都能准确聚焦在出缝处,分析了系统的在数对单色仪技术指标的影响,优化了设计方案,使系统在13nm处的分辨率λ/Δλ≥2000(狭缝开启50um)。 相似文献
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基于光学异常透射现象的光纤传感器,因其具有高度的近场增强效应和介电环境的高度敏感性等优点,在化学、生物医学等领域有广泛的应用前景。但是由于在光纤端面加工周期纳米结构需要复杂的工艺或者昂贵的微加工仪器,限制了基于光学异常透射现象的光纤传感器的发展。针对这一问题,提出了模板转移法在光纤端面加工金属周期纳米结构,并搭建实验系统对应用该方法制作的光纤传感器的传感特性及其物理机理进行了研究。实验结果表明,模板转移法能够很好地完成在光纤端面加工高质量的周期金属纳米结构。应用该方法制作的光纤传感器具有很好的传感特性,传感器的最高灵敏度达到594.45 nm·RIU-1,品质因数值达到33.12。 相似文献
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13C核磁共振波谱法对高吸水性树脂交联反应的研究 总被引:4,自引:0,他引:4
UV光聚合法合成丙烯酸-丙烯酸钠共聚型高吸水性树脂(SAR)是一种新型的聚合方法,其中丙烯酸羟乙脂(HEA)是一种重要的交联剂。它通过共聚和酯化两种反应使聚合体系发生交联。通过~(13)C核磁共振波谱法(~(13)C-NMR)对交联体系进行分析,HEA在体系中的酯化交联率为22.3%,是使反应体系发生交联作用的主要原因。以HEA为交联剂制得的高吸水性树脂的吸水率Q可达996mL·g~(-1)。 相似文献
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Preparation and Characterization of Melamine-Formaldehyde Resin Micro- and Nanocapsules Filled with n-Dodecane 总被引:1,自引:0,他引:1
Kongying Zhu Hengzhi Qi Shuang Wang Jianwei Zhou Yunhui Zhao Junfeng Su 《Journal of Macromolecular Science: Physics》2013,52(10):1976-1990
Capsules containing phase change materials (PCMs) have been widely studied for applications in heat transfer, heat storage and temperature control. The average diameter of encapsulated PCMs usually has a large effect on the physical properties of these functional materials. The aim of this study was to prepare and characterize encapsulated n-dodecane, a kind of PCM with a phase change temperature at about ?10°C, in micro- and nanoscales via an in-situ polymerization method with melamine-formaldehyde resin (MF) as the shell. By analyses with scanning electronic microscopy, Fourier transform infrared spectroscopy and 13C nuclear magnetic resonance, it was found that the obtained capsules containing n-dodecane were on microns or several hundreds of nanometers size with spherical shape and smooth surface, and the agglomeration of the capsules was mainly dependent on the average diameters which was controlled by the stirring rate during emulsification of n-dodecane, as well as the concentration of the emulsifying agent and the reaction temperature. Thermogravimetric analysis showed that the n-dodecane capsules increased their thermal stability with decreased diameter. The results of differential scanning calorimetry showed that the supercooling degree of n-dodecane in nanocapsules was somewhat higher than that in the microcapsules, and the suppression of supercooling is considered. 相似文献