Zhan Yanping, Li Chao, Yu Yuejin, et al. Effect of Vacuum Freeze-drying Process Parameters on Acid Paper Literatures[J]. Journal of refrigeration, 2014, 35(2).
Zhan Yanping, Li Chao, Yu Yuejin, et al. Effect of Vacuum Freeze-drying Process Parameters on Acid Paper Literatures[J]. Journal of refrigeration, 2014, 35(2). DOI: 10.3969/j.issn.0253-4339.2014.02.100.
Acid paper documents are selected as the research subject
and the influence of procedure parameters (heating temperature
paper document thickness
pressure in drying room) on freeze-drying time and quality were explored
and obtained the sequence of importance and dehydration rate by orthogonal method. The results indicate that the different treatment levels of procedure parameters had remarkable influence on both vacuum freeze-drying time and the quality
and the importance sequence of the three factors both as follows: paper documents thickness
heating temperature
and pressure in drying chamber. The optimal parameters were a thickness of 7mm
heating temperature of 25℃ and pressure of 10~20Pa by optimization analysis.