Heats of fusion of various amounts of absorbed water in wool keratin

✍ Scribed by A. R. Haly; J. W. Snaith

• Publisher: Wiley (John Wiley & Sons)
• Year: 1969
• Tongue: English
• Weight: 819 KB
• Volume: 7
• Category: Article
• ISSN: 0006-3525
• DOI: 10.1002/bip.1969.360070405

✦ Synopsis

Wool-water systems, at water contents above a threshold value of 22.7 g of water per 100 g of wool keratin, yielded curves of specific heat against temperature showing peaks that are ascribed to the fusion of the absorbed water. Integral and incremental heats of fusion were obtsined. Integral heats increase as the square of the water content above the threshold, and incremental heats follow a linear relationship. The incremental heat reaches a value of 55 cal/absorbed water, at the saturation water content at O°C of 33.9 g of water per 100 g of keratin. The state of the absorbed water is discussed. Clustering of water molecules takes place only above the threshold water content.

*Water content is expressed as a percentage of the mass of dry wool.

* Antoniou (see discussion of his paperls) found long-term negative drifts in the case of fusion of water in porous glass, i.e., for a nearly rigid substrate.