LCD用UV固化光敏胶的研制

研制了UV固化光敏胶，该光敏胶具有光敏性强、固化后的粘接力强以及耐腐蚀、耐热冲击性能好等特点，可代替国外进口专用光敏胶用于LCD的制作。     

紫外线固化涂料用光敏引发剂的研究进展

紫外光固化涂料是新一代绿色环保化工产品,由于其性能优良,近几年获得了快速发展。光敏引发剂作为紫外固化涂料的重要组成部分,也随之获得迅猛发展。光敏引发剂的种类繁多,如阳离子型、安息香型、苯乙酮类、芳香酮类和酰基氧化膦类等,它们具有不同的结构、特性和引发机理,如分解反应机理、氢提取反应机理、电荷转移复合物机理及能量转移机理,并从三个方面介绍了光敏引发剂的一些新近展高分子负载的光敏引发剂、水溶性的光敏引发剂及不同光敏引发剂的配伍。     

光固化快速成型中光敏树脂合成及其特性

以环氧树脂和丙烯酸为基本原料,设计并合成了紫外光固化用环氧丙烯酸齐聚物.考察了反应温度对酯化反应程度的影响,确立了温度-时间控制函数,利用SEM和IR光谱仪对光固化行为进行了结构和红外性能表征.并测定了光引发剂含量不同的树脂体系的线收缩率.结果表明:环氧丙烯酸酯化反应的适宜温度为(90～110)℃,UV固化后树脂体系的线收缩率约为2.4%,且固化程度好,交联度高.     

紫外光固化油墨的应用现状和发展

概述了国内外紫外光固化油墨的发展进程，分析了紫外光固化油墨的成膜原理及其组成，并对紫外光固化油墨的特点和应用进行了阐述。综述了影响紫外光固化油墨性能的因素，并指出了紫外光固化油墨目前存在的问题和今后的发展方向。     

紫外光固化油墨的应用现状和发展

概述了国内外紫外光固化油墨的发展进程,分析了紫外光固化油墨的成膜原理及其组成,并对紫外光固化油墨的特点和应用进行了阐述。综述了影响紫外光固化油墨性能的因素,并指出了紫外光固化油墨目前存在的问题和今后的发展方向。     

紫外光固化环氧丙烯酸酯合成及应用

介绍了一种紫外光固化齐聚物的合成以及在三种涂料中的应用 ,讨论了齐聚物在涂料中的各种特性。     

紫外光固化环氧丙烯酸酯合成及应用

介绍了一种紫外光固化齐聚物的合成以及在三种涂料中的应用，讨论了齐聚物在涂料中的各种特性。     

紫外光固化乙烯基酯树脂复合材料研究

研究了光引发剂种类、浓度对乙烯基树脂光固化速度、厚度的影响.结果表明,在引发剂浓度为4%时凝胶固化时间最短,树脂固化厚度与引发剂浓度成反比.在此基础上制备了紫外光辐射固化玻璃纤维增强乙烯基树脂复合材料,比较了紫外光固化复合材料和热固化复合材料的力学性能,采用光固化的复合材料试样力学性能优于热固化.     

纳米银线填充紫外光固化导电胶的制备和性能

紫外光固化导电胶是近年来发展出来的粘合剂新品种.该导电胶是把纳米银线填充到环氧丙烯酸树脂中,再添加光固化剂等助剂而成.结果表明该导电胶能够轻易地被紫外光所固化.制备出的导电胶具有良好的导电性能,其电阻率可达1.5×10-4 Ω.cm.     

环氧丙烯酸酯紫外光固化涂料的研制

实验合成了涂料用紫外光固化环氧丙烯酸树脂,并对其固化时间、铅笔硬度、附着力、柔韧性、耐磨性能及耐化学品性进行测试.得到了预期的效果.     

酚改性热固型XF树脂的合成

本文在前期二甲苯－甲醛树脂（ＸＦ树脂）合成的基础上，进一步合成了酚改性热固型ＸＦ树脂．在理论分析的基础上，经实验成功地提出了实现ＸＦ树脂高转化的方法．合成的酚改性热固型ＸＦ树脂的原料消耗成本比一般热固型酚醛树脂约低３０％．     

紫外光降解水中氟比洛芬的动力学与机理

为了研究水中氟比洛芬紫外光降解的动力学与机理,通过单因素试验考查反应温度、氟比洛芬初始浓度、溶液初始pH值、溶液腐殖酸浓度、常见阴阳离子对氟比洛芬紫外光降解的影响;并通过液相色谱质谱联用定性检测光降解的中间产物,推测可能的光降解途径.结果表明,氟比洛芬紫外光降解过程符合准一级动力学方程;提高反应体系温度,或降低氟比洛芬初始浓度都有助于降解速率常数的提高;氟比洛芬在偏酸性（pH在6～7之间）环境中光降解效果最好;低浓度腐殖酸对光降解几乎没有作用,但当腐殖酸质量浓度超过10 mg/L时,会产生很大抑制作用;天然水中常见阴阳离子对光降解影响很小.此外,在光解过程中,氟原子很容易从苯环上脱落下来,形成F-,继而发生去羧基化和羟基化.     

Completely green synthesis of Ag nanoparticles stabilized by soy protein isolate under UV irradiation

A completely green pathway for the preparation of Ag nanoparticles was proposed, by using soy protein isolate (SPI) as stabilizer under UV irradiation and H2O as the environmentally benign solvent throughout the preparation. Transmission electronic microscopy (TEM) and zeta potential characterization results indicated that the Ag nanoparticles were stable and well dispersed with an average diameter about 13 nm, and X-ray diffraction (XRD) analysis of SPI/Ag composite nanoparticles confirmed the formation of metallic silver. UV-Vis spectrum showed that the Ag nanoparticles dispersion solution had the maximum absorbance at about 430 nm due to surface plasmon resonance of the Ag nanoparticles. Infrared spectroscopy confirmed that the polypeptide backbone of SPI was not cleaved during the conjugation process and that some active amino groups were oxidized. The SPI/Ag composite nanoparticles have excellent antibacterial activity against two representative bacteria, staphylococcus aureus (Gram positive) and escherichia coli (Gram negative) in the presence of SPI.     

The stability of C-phycocyanin doped silica biomaterials in UV irradiation

The synthesized C-phycocyanins (C-PCs) doped silica biomaterials were characterized by the SEM and BET surface area analysis measurement. The morphology of C-PCs doped silica biomaterials indicates that the surface of the silica cluster is formed by a great number of silica particles with an average size of between 30 and 40 nm. Silica itself is a porous structure with the average pore diameter of 2.95 nm. Pores with their diameter less than 5 nm account for 84.07%. In addition, the C-PCs can be utilized as a fluorescent protein probe to monitor influence of the protein encapsulation and to study matrix and protein interaction and stability of protein in silica matrix. Application of protein encapsulation silica materials requires biomolecules to keep bioactivity and stability on potentially unfavorable industrial conditions. The C-PCs in solution or in silicate matrix irradiated by ultraviolet ray can result in photobleaching, whereas the protein in the silica is less affected. The measured photodamage rate constant of C-PCs in buffer solution is 25 times faster than that of C-PCs in silica matrix. However, the lifetime of C-PCs in silica matrix or phosphate buffer is unaffected. These studies suggest that entrapment of C-PCs into silica matrixes not only can maintain their biological activity but also noticeably improve their photostability.     

Effect of UV irradiation on PAN precursor fibers and stabilization process

A low-cost rout for modification the polyacrylontrile(PAN) precursor fibers was developed.The approach involved pretreatment PAN precursor fibers with UV irradiation for various periods of time before the fibers were stabilized.The effect of UV irradiation on the chemical structure,orientation factor,density,crystallite size and morphology of the fibers in the process of stabilization was characterized by use of fourier transform infrared spectroscopy(FTIR),float-sink procedure,X-ray diffraction(XRD),scanning electron microscope(SEM),respectively.The results showed that UV irradiation could increase the density of the fibers in stabilization process.FTIR analysis indicated that the cyclization of nitrile groups was initiated at room temperature by UV irradiation.The transformation of C≡N groups to C=N ones was accelerated in the process of stabilization.The orientation factor of irradiated fibers was also increased.The crystallite size was decreased at first and increased later,and the better irradiation time of UV was 3 min according to the XRD test.SEM analysis indicated that irradiation could decrease the internal and surface defects of the stabilized fibers treated at 300 ℃.     

光敏杂化溶胶-凝胶法研制多模干涉波导分束器

采用有机/无机杂化溶胶-凝胶方法制备高质量的SiO2薄膜和光敏性薄膜材料;利用三维FD-BPM(finitedifference beam propagation method)研究了掩埋式和暴露式矩形波导结构多模干涉(MMI)型光功率分束器的主要性能,理论模拟发现,掩埋式矩形波导结构分束器的长度、宽度和厚度容差性都优于暴露式矩形波导结构的MMI型分束器,并且具有更宽的带宽特性。通过简单的紫外曝光、显影工艺制备了1×4 MMI型波导分束器,分束器在1 550 nm波长附近的插入损耗为8.1～8.8 dB,功率分束不均匀性小于1 dB。     

Effects of postthermal treatment and UV irradiation on the structure of titania-polyacrylate nanocomposites

The effects of postthermal treatment and irradiation time on the structure and thermal stability of TiO2/polyacrylate nanocomposites by a sol-gel process in reverse micelles and subsequent rapid photopolymerization were investigated, and the hybrid films were characterized by thermal gravimetry analysis （TGA）, X-ray photoelectron spectrum （XPS）, and atomic force microscopy （AFM）. XPS data suggested that the prolongation of irradiation time and the postthermal treatment promoted titania formation, with the former affecting more remarkably. TGA data showed that TiO2-hybrid films could upgrade the decomposition onset temperature （Tonset） as well as the temperature at which there is a maximum mass loss rate （Tmax）. AFM data demonstrated that the inorganic titania particles with a mean diameter of 25.26-28.84 nm were homogeneously distributed in the organic matrix.     

Adsorption behaviors of gas molecules on the surface of ZnO nanocrystals under UV irradiation

A UV-activated room temperature chemiresistive gas sensor based on ZnO nanocrystals film was fabricated. Its gas sensing properties under various conditions were also investigated in detail. The results shed new insight into the adsorption behaviors of gas molecules on the surface of Zn O nanocrystals under UV irradiation. The chemisorbed oxygen species(O_2~-(ads)(hv)) induced by UV light govern the adsorption and desorption ways of other gas molecules on the surface of ZnO nanocrystals, which is dependent on the electron affinity of gas molecules. Gas molecules with higher electron affinity than oxygen molecules can be adsorbed on the surface by the competitive adsorption way, extracting electrons from the surface. Gas molecules with lower electron affinity than oxygen molecules are attracted by the adsorbed O_2~-(ads)(hv)layer, releasing electrons to the surface. These processes can influence the gas sensing properties of the sensor. Our findings will pave the way for the fundamental understanding and design of UV-activated gas sensor in the future.     

Fabrication of YBCO superconducting microarray by sol-gel process using photosensitive metal chelates

We used yttrium acetate, barium acetate, and copper acetate as the starting materials, benzalacetone (BzAcH) as chemical modifier, and methanol (MEOH) as solvent to synthesize a stable fluorine-free YBCO precursor sol. The coated YBCO gel film using this precursor sol exhibited photosensitivity to UV irradiation at a wavelength of 330 nm. After the subsequent exposing, the YBCO gel film showed a decreased solubility in several organic solvents. Based on the photosensitivity of the YBCO/BzAcH gel film, YBCO superconducting microarray with the pitch of 5 μm was fabricated by irradiating the gel film with UV light through a mask, followed by leaching the unirradiated area in a mixture solvent of methanol and n-butyl alcohol with the volume ratio of 1:1. After proper heat treatment the x-ray diffraction result showed that the as-prepared arrays were highly c-axis oriented and with a high T c by this new photosensitive sol-gel process.     

催化氧化法制备快干型木薯淀粉胶粘剂

催化氧化使木薯淀粉的氧化降解时间大幅减少,羧基和羰基含量大幅增加.用高效凝胶渗透色谱与多角度激光光散射仪联用技术分析氧化淀粉的结果表明,催化氧化淀粉CY-0.5的分子量分布比无催化氧化淀粉WC-2和WC-8的窄,且分布均匀.由催化氧化淀粉制得的淀粉胶粘剂具有固含量高、干燥速度快和粘接强度大的特点.最佳制备条件为催化剂用量0.5%,次氯酸钠用量(有效氯)1.3%-1.6%,氧化时间30 min,氢氧化钠用量12%,硼砂用量2%,固含量25%-30%.