光热敏微胶囊材料光固化影像密度特性研究  

Study on the Photo-Solidified Image Density Property of the Photo-Heat Sensitive Microcapsule Material

作　　者：李晓苇[1] 冯红光[1] 赖伟东[1] 傅广生[1] 

机构地区：[1]河北大学物理科学与技术学院,保定071002

出　　处：《信息记录材料》2009年第6期16-19,共4页Information Recording Materials

基　　金：国家自然科学基金(60877010);高等学校博士学科点专项科研基金(20060075003);河北省自然科学基金(2006001039);河北省教育厅指导计划项目(Z2009305)资助

摘　　要：光热敏微胶囊材料可作为新型非银盐信息记录媒质,其囊芯光敏反应是实现光信息记录的关键。本文利用傅立叶变换红外光谱技术,通过监测囊芯TMPTA单体的C=C双键在1650-1626cm-1处特征吸收峰随曝光时间的变化,发现在紫外光照射下,TMPTA分子C=C双键在光引发剂自由基作用下发生交联聚合而引起微胶囊囊芯固化,随曝光时间增长,囊芯固化程度表现为先快速增加,再到曝光20s后基本达到稳定。显影密度检测表明,光热敏微胶囊内部固化程度直接决定了后续热显影的影像密度,进而在不同曝光时间下形成了影像密度反差。The photo-heat sensitive microcapsule material can be acted as novel non-silver information recording medium, and the photo-sensitive property in microcapsule core is the key factor to affect the information recording efficiency. The C=C bonds characteristic absorption around 1650-1626 cm^-1 of TMPTA monomer, which comprises of the microcapsule core compound, has been detected with FTIR spectra technique. Results imply that the C=C bonds of TMPTA has been photo-crosslinked initiated by the photoinitiator radicals during UV exposure, while the photo-crosslinking extent rises with the exposure time increase and takes stable extent after exposed for 20s . Based on image density detection, it shows that the heat-sensitive colorforming process is decided by the core photo-solidification for the photo-heat sensitive microcapsule material, and the image density contrast has been formed at different exposure time.

关 键 词：微胶囊 影像密度 光固化 热敏显色 

分 类 号：TQ577.4[化学工程—精细化工]