混合银盐的光敏热成像材料感光性能研究  

The Photographic Performances Research of Photothermographic Materials Based on Mixed Silver Salts

作　　者：李秋艳[1] 孙双月[1] 梁海燕[2] 李金培[3] 

机构地区：[1]北京化工大学北方学院理工院,河北廊坊065201 [2]北京工商大学理学院,北京100048 [3]中国科学院理化技术研究所,北京100190

出　　处：《影像科学与光化学》2012年第1期53-59,共7页Imaging Science and Photochemistry

摘　　要：本文以原位法合成的AgBrI作为光敏剂,亲水型的聚乙烯醇为粘合剂,考察了以苯并三氮唑银和4-羟基-6甲基-1,3,3a,7-四氮茚银混合银盐为银源的光敏热成像材料的感光性能,实验结果表明:含AgTAI的混合银盐的PTG材料感光性能明显好于单纯AgBTA的PTG材料.通过光敏热成像材料乳液pH值pAg值测定及银盐DSC分析,认为混合银盐能够提高PTG材料感光性能的原因是其溶解度比AgBTA的溶解度大,能够提供充足的Ag+,增大显影密度,提高反差,且混合银盐颗粒尺寸小,其比表面积大,能够充分接触超细卤化银颗粒,从而促进热显影的进行.The photographic performances of photothermographic （PTG） materials based on silver benzotriazole （AgBTA） and silver 4-hydroxy-6-methyl-1,3,3a, 7-tetraazaindene （AgTAD have been studied, in which, hydrophilic polyvinyl alcohol （PVA） is used as a binder and the AgBrI prepared by in-situ method as photo-sensitive element. It is found that the mixed silver source PTG materials have a higher sensitivity than the PTG materials based on single AgBTA. The mechanism of the mixed silver source PTG materials with a higher sensitivity has been investigated according to the measurements of pH, pAg of the emulsion and the differential scanning calorimetry （DSC） of the mixed silver salts. It is analyzed that the elevation of the sensitivity is due to the fine grains of mixed silver salts and high concentration of silver ions so that promote the development process.

关 键 词：光敏热成像材料 苯并三氮唑银 四氮茚银 感光性能 

分 类 号：TQ575[化学工程—精细化工]