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Effect of vacuum freeze-drying process parameters on acid paper literatures.

[In Chinese. / En chinois.]

Author(s) : ZHAN Y., LI C., YU Y., et al.

Type of article: Article

Summary

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 the sequence of importance and dehydration rate were obtained 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 were as follows: paper documents thickness, heating temperature, and pressure in drying chamber. The optimal parameters were a thickness of 7mm, heating temperature of 25°C ; and pressure of 10-20 Pa by optimization analysis.

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