丙烯酰胺基光聚物光化动力学及全息存储性能研究
文献类型：学位论文
| 作者 | 弓巧侠 |
| 学位类别 | 博士 |
| 答辩日期 | 2005 |
| 授予单位 | 中国科学院上海光学精密机械研究所 |
| 导师 | 干福熹 |
| 关键词 | 全息存储 光致聚合物 光化漂白 衍射效率 曝光灵敏度 |
| 其他题名 | Research of Photobleaching and Holographic Storage for Acrylamide-based Photopolymer |
| 中文摘要 | 本论文在综述光全息技术发展和有机光致聚合材料的光存储原理、材料全息存储性能和当前光聚物材料的最新发展的基础上，开展了对丙烯酞胺基及憎水性光聚物的成分设计，不同单体、粘结剂、引发剂（电子掺杂剂）及染料（光敏剂）等对高密度数字全息存储性能的影响及其规律的研究，主要研究结果阐述如下：采用单光束曝光法，研究了以三乙醇胺作为引发剂时，几种不同染料藻红B（ErB）、曙红Y（EY）、孟加拉玫瑰红B（RsB）、罗丹明B（RoB）及荧光素（F）的光化漂白过程。五种染料的光化漂白速率大小顺序是藻红B（ErB）＞曙红Y（EY）＞孟加拉玫瑰红B（RsB）＞罗丹明B（R0B）＞荧光素（F）。并研究了曝光强度及染料浓度对染料的光化漂白速率的影响及其规律。采用单光束曝光法，研究以N一苯基甘氨酸作为引发剂时，几种不同染料藻红B（ErB）、曙红Y（EY）、罗月明B（R0B）及荧光素（F）的光化漂白过程。研究了染料浓度、引发剂浓度、曝光强度及加入阳离子引发剂二苯碘六氟磷酸盐（DPI）对引发体系量子产率及染料摩尔吸收系数的影响及其规律。并根据光化反应理论分析了光聚物样品曝光灵敏度与引发体系量子产率之间的关系。结合光聚物材料的记录机理，研究了光聚物中单体、粘结剂、引发剂及染料对样品衍射效率、曝光灵敏度、样品光学质量及稳定性的影响。发现单体及粘结剂主要影响光聚物样品的记录性能及光学质量，引发剂及染料主要影响光聚物样品的曝光灵敏度。制备了一种新型的抗湿性光聚物。样品以N-苯基甘氨酸作为引发剂，材料I的稳定性高对环境湿度不敏感。对样品中的染料、引发剂及增塑剂浓度分别进行了优化，得到一个最佳值。在光聚物样品膜厚为150μm时，曝光强度为60mJ／cm~2，衍射效率可以达到50％。发现向光聚物样品中加入阳离子引发剂二苯碘六氟磷酸盐（DPI），可使曝光灵敏度提高四倍。制备了A刀HMA基光聚物。研究了以N-羟甲基丙烯酰胺（HMA）及丙烯酰胺（AA）作为复合单体时，材料的全，急胜能。研究了N－甲基丙烯酰胺对样品稳定性、曝光灵敏度、衍射效率、光学质量的影响。发现向光聚物中加入少量N一轻甲基丙烯酰胺单体，可以提高材料稳定性，降低光聚物样品的散射，改善光聚物样品的光学质量。制备了一种新型的憎水性光聚物，这种光聚物以有机物作为溶剂，在密闭容器中干燥成膜。研究了光聚物样品中各组份对材料衍射效率、曝光灵敏度的影响。通过改变光聚物样品的成份来改善样品的全息存储性能。采用双透镜4f系统对制备的光聚物样品进行全息存储实验研究，存储图像清晰，误码率低。 |
| 英文摘要 | On the base of reviewing the progress of holographic storage technology, the principle of the photopolymerization of photopolymer, the performance of materials and development of modern photopolymers, the compositions of acrylamide-based photopolymer and hydrophobic photopolymer are designed. The effect of monomers, binder, photoinitiator (charge transfer agent) and dye (photosensitizer) on holographic storage is studied. Photobleaching of five different xanthenes dyes Erythrosin B (ErB), Eosin Y (EY), Rose Bengal (RsB), Rodamine B (RoB) and Fluorescein (F) are studied by a single beam exposure experiment. The bleaching kinetics of xanthenes dyes follows the order ErB>EY>RsB>RoB>F in presence of an electron donor triethanolamine (TEA). The influence of expose intensity and dye's concentration on the photobleaching process of xanthenes dyes and the holographic recording properties of the five dyes are presented. The causes of these changes are presented under the consideration the mechanism of photobleaching of photopolymer. Photobleaching of four different xanthenes dyes Erythrosin B (ErB), Eosin Y (EY), Rose Bengal (RsB) and Fluorescein (F) in presence of an electron donor N-phenylglycine (NPG) is investigated with a single beam exposure experiment. Quantum yield and molar absorption coefficients of the photoinitiator are responsible for holographic sensitivity. The influence of exposure intensity, the concentrations of N-phenylglycine and dye on the quantum yield and molar absorption coefficients are presented. In addition, the effect of diphenyliodonium hexafluorophosphate salt on the quantum yield and molar absorption of xanthene dyes is studied. The causes of these changes are presented under the consideration the mechanism of photobleaching of photopolymer. The effects of quantum yield for photoinitiating system and sensitivity of holographic recording material have been discussed. According to the holographic recording principle of the photopolymer, the relationship between the concentration of photosensitizing dye, initiator, and monomer, property of the binder polymers and holographic properties of photopolymer films are discussed. By optimization the contents of photopolymer, we have attained a clear knowledge of every components' function in the material. Monomers and binder have main influence on the recording properties and optial quality of photopolymer. Photoinitiator and dye have main influence on the exposure sensitivity of photopolymer. A new humidity-resistant highly sensitive acrylamide -based photopolymeric holographic recording material has been developed. The photopolymer is resistant to the humidity of environment. Diffraction efficiencies near 50% are obtained with exposure energy of 60mJ/crrr in materials of 150ja.m thickness. Diphenyl iodonium chloride is added to the material and can increase the exposure sensitivity by a factor of more than 4. New photopolymerizable holographic recording material based on acrylamide (AA) and N-hydroxymethyl acrylamide (HMA) has been developed. The recording is obtained by the copolymerization of acrylamide and N-hydroxymethyl acrylamide. The effect of N-hydroxymethyl acrylamide on the holographic properties of photopolymer is studied. With the increase of the concentration of N-hydroxymethyl acrylamide, the stability of the film increases, scattering reduces and the straight image is clearer with a small distortion. A new hydrophobic photopolymer which is different to the water soluble photopolymer has been developed. The effect of photopolymer component on the diffraction efficiency and exposure sensitivity of photopolymer is studied. To improve the properties of photopolymer, we changed the component in the sample. The experiment of holographic storage is carried out. An image has been successfully stored in the material with a small distortion by 4f optical system. |
| 语种 | 中文 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/15354]  |
| 专题 | 上海光学精密机械研究所_学位论文 |
| 推荐引用方式 GB/T 7714 | 弓巧侠. 丙烯酰胺基光聚物光化动力学及全息存储性能研究[D]. 中国科学院上海光学精密机械研究所. 2005. |
入库方式： OAI收割
来源：上海光学精密机械研究所
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