The Sorption Behavior of Cystine-Modified Wool

Watt, I. C.

doi:10.1177/004051756303300805

Cited by 16 publications

(7 citation statements)

References 10 publications

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“…This increase of cystine content has been suggested from the work of Gillespie and Inglis 50 to be associated with the high-sulfur protein SCMKB extracted from the ␣-keratin structure. A similar conclusion exists for the lack of moisture change as indicated by Watt, 45 with major disulfide breakdown; that the disulfide crosslinkages are concentrated structurally in isolated units. Mechanical tests performed on sections of porcupine quill and rhinoceros horn at right angles to the fiber direction and in water at 20°C indicate completely parallel behavior to that of fibers in torsion.…”

Section: Structural Models Of ␣-Keratinsupporting

confidence: 68%

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Natural protein fibers

Feughelman

2001

J of Applied Polymer Sci

122

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Alpha keratin fibers (hairs, wools, quills, and other mammalian appendages) together with fibroin fibers such as silks and spiders webs are all highly extensible fibrous proteins for which the mechanical properties are of primary importance both to the animal from which they originate and their ultimate application by man. Similarly, the collagens are highly inextensible fibrous proteins, which form the major component of mammalian skin and connecting structures such as tendons. All these fibrous proteins are biological polymers of polypeptide chains for which the mechanical and allied physical properties, such as water absorption, relate to both their macrostructure and their molecular and near-molecular structure. Because of both their commercial application and their relatively complex structure at the molecular and near-molecular level, interpretation of the physical properties of ␣-keratin fibers represents the main component of this presentation. The mechanical properties of ␣-keratin fibers are primarily related to the two components of the elongated cortical cells, the highly ordered intermediate filaments (microfibrils) which contain the ␣-helices, and the matrix in which the intermediate filaments are embedded. The matrix consists of globular proteins plus water, the content of the latter being dependent on the fibers environment. The Extended Two-Phase Model (ETPM) has been developed and results in a detailed coverage of the bulk mechanical properties of ␣-helical fibers in terms of their known molecular and near-molecular structure. The inextensible protein fibers, the collagens and fibroins, are also briefly discussed in terms of the relationship between mechanical properties and the structure of these fibers.

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Section: Structural Models Of ␣-Keratinsupporting

confidence: 68%

“…Watt 45 has shown that cystine reduced but unalkylated wools have no significant change in equilibrium water content for fibers in water at room temperature. Wools in which 90% of the disulfide bonds had been broken by reduction had an equilibrium water content only 1% higher than that of an unreduced normal fiber.…”

Section: Structural Models Of ␣-Keratinmentioning

confidence: 99%

Natural protein fibers

Feughelman

2001

J of Applied Polymer Sci

122

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“…Haly [45] found the swelling of wool in water to be greatly increased by supercontraction, by setting, and by reduction of disulfide bonds followed by methylation of the resultant sulfydryl groups. The measurement of complete adsorption isotherms [118] revealed that the isotherms of wool treated in this way deviate from that of unmodified wool only at high humidities (>80% r. h. ), with maximum deviation at saturation.…”

Section: Accessibility Of Keratin To Water Vapormentioning

confidence: 94%

Sorption of Water Vapor by Keratin

Watt

1980

Journal of Macromolecular Science, Part C

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“…Further, even when a large number of the disulndes in wool are reduced, there is no increase in saturation regain or swelling [9,14].…”

Section: Discussionmentioning

confidence: 99%

The Modification of Wool by Certain Organic Sorbates

Griffith

Haly

1967

Textile Research Journal

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The pleat retention, load—extension behavior, bursting strength, hygral expansion, felting rate, abrasion resistance, wrinkle recovery, and bending length of fabrics treated with additives of the type described in Part I have been investigated. Those additives of the anionic detergent type which contain more than 50% alkyl chain per molecule bring about the least improvement in pleat retention and the greatest modification in the wrinkle recovery and extensional properties of the fabric, whereas those which are naphthalene sulfonic acid derivatives accelerate photochemical decomposition of the fabric. The treatments are fast to dry-cleaning and to water but not to alkali. All the additives examined decrease the hygral expansion and felting rate of the fabric and increase its resistance to abrasion. . by the fabric was determined by the weight increase method (Part I).Reference samples Comparisons are made here between the treated fabrics and reference fabrics: Rt is the untreated fabric, R2 is the fabric treated as above but in the absence of acid and additive, and R3 is the fabric treated in the absence of the additive.

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The Sorption Behavior of Cystine-Modified Wool

Cited by 16 publications

References 10 publications

Natural protein fibers

Natural protein fibers

Sorption of Water Vapor by Keratin

The Modification of Wool by Certain Organic Sorbates

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