Physical properties of wool

Hearle, J. W. S.

doi:10.1533/9781855737648.80

Cited by 17 publications

(11 citation statements)

References 45 publications

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“…Tensile strength of the pure keratin fibers cross-linked by glutaraldehyde, which mainly reacts with the ε-amino group of Lys residues (Figure S1b), approaches to 11.14 ± 2.07 cN/tex (Figure a). Nevertheless, the elongation at break is only 3.93 ± 0.81%, which is much lower than that of natural wool (∼40%). ,− The high brittleness is not suitable for textiles. Consequently, the toughening agent H-HPC is incorporated to the keratin solution before spinning.…”

Section: Results and Discussionmentioning

confidence: 95%

“…A careful survey of the tensile properties of wool indicates that the elongation at break of the above optimized keratin fibers resembles that of wool, but the tensile strength does not meet the minimum application requirement for wool fibers (strength of wool = 8–15 cN/tex). ,− To further increase the strength, MDI is used as the second cross-linking agent that reacts with hydroxyl or amino groups in the fibers (Figure S1c). Compared with the keratin fibers cross-linked by glutaraldehyde alone, the tensile strength of the dually cross-linked fibers increases to 9.21 ± 1.37 cN/tex, while the elongation at break only slightly decreases from 43.32 ± 14.39 to 39.20 ± 12.23% (Figure b and Table S4).…”

Section: Results and Discussionmentioning

confidence: 99%

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Continuous High-Content Keratin Fibers with Balanced Properties Derived from Wool Waste

Cao

Rong

Zhang

2020

ACS Sustainable Chem. Eng.

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The full utilization of discarded wool for the preparation of continuous recycled keratin fibers has been a challenging subject. The key issue lies in how to utilize wool keratin as much as possible without damaging the main chain structure of the protein molecules. Based on small molecule simulation reactions, the authors find out that disulfide bonds, the only cross-linking bonds in keratin, can be effectively broken by starch-derived dithiothreitol, and the resultant keratin can be well separated by the cosmetic ingredient sodium dodecyl sulfate, which forms micelles that stabilize the keratin solution. Accordingly, the traditional strong hydrogen-bond breakers like urea and LiBr can no longer be used, which helps to protect the integrity of keratin. The resultant fully dissolved, highly concentrated keratin solution (keratin content = 18 wt %) is directly applied for wet spinning. To toughen and strengthen the envisaged keratin fibers, a few hydroxypropyl cellulose and glutaraldehyde and 4,4′methylenebis(phenyl isocyanate) are incorporated. Eventually, the regenerated continuous fibers with keratin content as high as 90 wt % offer a combination of properties similar to natural wool.

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Section: Results and Discussionmentioning

confidence: 95%

Section: Results and Discussionmentioning

confidence: 99%

Continuous High-Content Keratin Fibers with Balanced Properties Derived from Wool Waste

Cao

Rong

Zhang

2020

ACS Sustainable Chem. Eng.

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“…The shear modulus of the wool material G is set to 1:5 GPa, based on Hearle. 35 Another important material property is the interfiber friction coefficient. In Hearle, 35 the values range is between 0.13 and 0.61 for the static friction coefficient between wool fibers, depending on the directionality of the scales.…”

Section: Structural Modelsmentioning

confidence: 99%

A novel technique to simulate and characterize yarn mechanical behavior based on a geometrical fiber model extracted from microcomputed tomography imaging

Bral

Daelemans

Degroote

2022

Textile Research Journal

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Textiles and their production machines are increasingly designed using simulations of the textile production process. These simulations require reliable structural yarn models. In practice, these models are often based on simplifying assumptions concerning the underlying geometry. However, in recent years more realistic geometrical fiber models have been developed, but have not been used to estimate the structural properties of yarns. The current contribution presents a new methodology to obtain a structural yarn model through numerical simulations based on a high-fidelity geometrical yarn model. Starting from microcomputed tomography data of a real-life natural fiber yarn used in air-jet weaving, a geometrical yarn model is constructed by tracing the individual fibers. This geometry is then incorporated in a computational finite-element analysis framework to obtain the yarn tensile and bending behavior through a simulated tensile test and Peirce cantilever test. Finally, the results are validated by comparison with experimental data. It is shown that this new technique succeeds to estimate the tensile and bending behavior. The presented methodology allows one to gain fundamental insight into the internal deformations and stresses in the yarn. Moreover, it is an important first step toward statistical studies on the structural yarn behavior on the microscale level and toward homogenized macro-models originating from a fully digital workflow.

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“…Currently, effective methods of wool disinfection consist in using steam-formalin chambers, Krupin's chambers and a method for washing wool with formalin [4]. In addition, the method of wool disinfection by extracting with solvents containing some reagents is of interest [5].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…One of the primary tasks in the treatment of wool is its disinfection in the technological process of classifying and sorting. Analysis of the technological process and equipment used by wool processing enterprises has revealed their significant shortcomings [1][2][3][4][5]:…”

Section: Introductionmentioning

confidence: 99%

Determining parameters of electromagnetic radiation for energoinformational disinfection of wool in its pretreatment

Kosulina

Черенков

Пиротти

et al. 2017

EEJET

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Physical properties of wool

Cited by 17 publications

References 45 publications

Continuous High-Content Keratin Fibers with Balanced Properties Derived from Wool Waste

Continuous High-Content Keratin Fibers with Balanced Properties Derived from Wool Waste

A novel technique to simulate and characterize yarn mechanical behavior based on a geometrical fiber model extracted from microcomputed tomography imaging

Determining parameters of electromagnetic radiation for energoinformational disinfection of wool in its pretreatment

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