PET片材印刷UV墨耐紫外老化性研究

目的 为制备性能良好和绿色环保的聚乙烯醇薄膜提供一定的理论依据。方法 分类介绍壳聚糖、纳米纤维素、可降解塑料、蛋白质等生物质材料增强聚乙烯醇薄膜及其在食品包装领域的研究现状。 结果 虽然通过与不同的生物质材料共混改性,可获得性能较为优良的聚乙烯醇薄膜,且用作食品包装时,具有抗菌与抗氧化、智能标签和整体保鲜的效果,但成本问题制约了实际生产。结论 利用生物质材料可以增强聚乙烯醇薄膜的综合性能,在食品包装领域有较好的发展前景。     

Selective and wideband UV sensors

It is shown that thin-film photoelectric devices can be constructed on the basis of wide-gap A^IIB^VI semiconductor compounds grown on a narrow-gap quasi-single-crystal substrate. The potential barrier ΔE _v existing at the interface of a multilayer heterostructure blocks the contribution of the narrow-gap component to the total photocurrent. Based on these heterostructures, selective and wideband UV sensors requiring no additional filters are developed for the first time.     

光固化胶粘剂的研制

采用环氧丙烯酸树脂制备光固化胶粘剂,研究了胶粘剂各组分含量、引发剂配比、引发剂含量对固化时间和粘接强度的影响,得到了一种具有优良光固化性能和粘接强度的光固化胶粘剂.     

UV 喷墨打印机色域的研究

用Mimaki UV 喷墨打印机及UV 油墨进行了试验,以不同墨量输出和承印材料为变量,通过制作ICC 文件并比较色域图,讨论了不同墨量输出对各阶调范围的色彩再现性的影响,并分析了承印材料的偏色对色域范围的影响。结果表明,对于Mimaki UV 喷墨打印机,可通过在纸张上打印UV 白墨的方式来进行避免承印材料影响的色彩再现;可根据图像的阶调主要分布情况来选择输出墨量值。     

UV Raman spectroscopy of hydrocarbons

In this paper, the UV Raman spectra of a large number of saturated and alkyl-substituted monocyclic, bicyclic and polycyclic aromatic hydrocarbons are obtained at 220 and 233 nm excitation wavelengths. Also included are nitrogen- and sulphur-containing hydrocarbons. The spectra obtained are fluorescence free, even for such highly fluorescent compounds as perylene, consistent with earlier reports of UV Raman spectra of hydrocarbons. The hydrocarbon UV Raman spectra exhibit greatly improved signal-to-noise ratio when in the neat liquid or solution state compared with the neat solid state, suggesting that some surface degradation occurs under the conditions used here. Assignments are given for most of the bands and clear marker bands for the different classes of hydrocarbons are readily observable, although their relative intensities vary greatly. These results are discussed in the context of structure and symmetry to develop a consistent, molecular-based model of vibrational group frequencies.     

Image Upconversion from the Visible to the UV Domain: Application to Dynamic UV Microstereolithography

We present what to our knowledge is a new application of optical frequency upconversion of images in quadratic materials to dynamic UV microstereolithography. A 150 x 150 point visible image transmitted by a liquid-crystal display was upconverted in a lithium triborate crystal, and the UV image was successfully used to polymerize a commercial stereolithographic resin.     

Reaction behaviors of decomposition of monocrotophos in aqueous solution by UV and UV/O processes

The decomposition of monocrotophos (cis-3-dimethoxyphosphinyloxy-N-methyl-crotonamide) in aqueous solution by UV and UV/O(3) processes was studied. The experiments were carried out under various solution pH values to investigate the decomposition efficiencies of the reactant and organic intermediates in order to determine the completeness of decomposition. The photolytic decomposition rate of monocrotophos was increased with increasing solution pH because the solution pH affects the distribution and light absorbance of monocrotophos species. The combination of O(3) with UV light apparently promoted the decomposition and mineralization of monocrotophos in aqueous solution. For the UV/O(3) process, the breakage of the >C=C< bond of monocrotophos by ozone molecules was found to occur first, followed by mineralization by hydroxyl radicals to generate CO(3)(2-), PO4(3-), and NO(3)(-) anions in sequence. The quasi-global kinetics based on a simplified consecutive-parallel reaction scheme was developed to describe the temporal behavior of monocrotophos decomposition in aqueous solution by the UV/O(3) process.     

UV喷墨色浆的分散稳定性的研究

目的 研究不同分散剂种类、 研磨时间、 储存时间条件对制备出的UV喷墨色浆分散稳定性能影响。方法 通过不同分散剂 （685, CH-13, 及685与CH-13的混合物 （m685∶mCH-13=1∶1）） 制备色浆, 预分散后改变研磨时间 （60, 75, 90 min）、 储存时间 （2, 12, 20 d） 得出9组色浆试样, 根据测量粒径大小和粒径分布情况进行分析。结果 分散剂685分散效果好, 研磨时间为75 min, 储存时间为2 d下色浆分散稳定效果好。结论 分散剂685制备的色浆的分散稳定性最佳, 研磨时间为75 min最佳, 色浆稳定性与储存时间呈现负相关关系。     

UV电泳光成像抗蚀剂的制备及性能

合成了水可分散阳离子型丙烯酸酯光敏聚合物(UPDHES),以其为主体树脂制得了阴极光敏电泳涂料乳液,并以铜箔为阴极进行电泳成膜、闪蒸、曝光、显影成像.研究了电泳过程中电流密度的变化对涂膜的影响,并对电泳涂膜进行了扫描电镜表征;考察了光敏树脂双键含量对其光固化动力学及性能的影响;最后对光成像抗蚀荆的分辨率进行了测试.结果...     

UV宽幅面喷绘市场前景看好

“2008年我国成功举办了北京第29届奥运会，为实践‘绿色奥运’理念，北京市许多的户外和户内广告都换成了环保型的广告，这其中很多是UV宽幅面喷绘机的杰作。统计显示，未来5年将是UV宽幅面喷绘机蓬勃发展的大好时机。”在第11届北京国际印刷信息交流大会上，深圳市润天智图像技术有限公司总经理助理李劲这样预言。李劲在接受《新闻出版报》记者采访时表示，之所以这样判断，     

深紫外和X射线光刻技术

阐述了深紫外光刻技术和Ｘ射线光刻技术的发展，一些相关单元技术，以及深紫外和Ｘ射线光刻技术的前景。     

紫外半导体电致发光器件研究进展

概述了紫外半导体电致发光器件的发展历史、现状、趋势及其应用,详述了国内外近两年对AlGaN基半导体电致发光器件的研究进展.     

水性紫外线固化光油的研究

采用甲苯二异氰酸酯、聚酯二元醇、二羟甲基丙酸和丙烯酸羟乙酯合成水性阴离子型聚氨酯丙烯酸酯,用傅立叶红外光谱( FTIR) 证实了该聚合物的结构.实验证明当NCO与OH物质的量比值为1.5,DMPA质量分数为5%时,所制得的聚氨酯丙烯酸酯乳液,外观和稳定性最好.最终制得水性UV光油,通过优化配方已达到普通UV光油的性能指标,且不需要预干燥装置,适合目前的光固化工艺流程,有较大的应用价值和市场前景.     

Ⅱ-Ⅵ Visible-Blind UV Photodetectors

This article gives a review on the physics and technical issues involved in the development of ZnS-based Ⅱ-Ⅵ visible-blind UV photodetectors. The results of photoresponse studies on ZnS, ZnSSe and ZnSTe diodes indicate that Te isoelectronic trapping effect is responsible for the gradual turn-on characteristic of low Te containing ZnSTe Schottky barrier photodiodes. The results also reveal that the ZnSSe diode, having the advantage of being free of isoelectronic centers, is a more suitable choice for applications requiring high visible rejection power. It is demonstrated that highly UV sensitive responsivity with an abrupt long wavelength cutoff tailored to lie between 340-400nm can be achieved in the ZnSSe diode system.