Communications to the Editor

Wortmann, Franz; Greven, R.; Zahn, Helmut

doi:10.1177/004051758205200708

Cited by 15 publications

(4 citation statements)

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“…To accurately analyze the independent components of the wool fiber, a prerequisite is the effective isolation of the cuticle or cortex from the native wool fibers [2], with many approaches investigated to achieve this separation [2][3][4][5][6][7][8][9][10][11]. In the past, simple mechanical processing was the focus, using specially designed apparatus, e.g.…”

Section: Introductionmentioning

confidence: 99%

“…In the past, simple mechanical processing was the focus, using specially designed apparatus, e.g. glass descalers [4], abraders [5], glass fiber snippets [6], or by high speed disperser [3], and ultrasonication [7]. Chemical methods have also been explored by treating wool fibers in various solutions, such as formic acid [2,8,9], detergent [2,10], or a solution of potassium hydroxide in dehydrated butanol [11].…”

Section: Introductionmentioning

confidence: 99%

“…Chemical methods have also been explored by treating wool fibers in various solutions, such as formic acid [2,8,9], detergent [2,10], or a solution of potassium hydroxide in dehydrated butanol [11]. However, those methods still suffer from the especially expensive/ designed facilities such as high speed disperser and the descalers [3][4][5][6], and requires long time (>14 h) [2,[7][8][9][10][11]. Thus finding a rapid and effective route to separating the cuticle or cortex from native wool fibers would be beneficial from both an academic and industrial perspective.…”

Section: Introductionmentioning

confidence: 99%

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Rapid and effective cuticle removal from wool fibers using ionic liquid

et al. 2015

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Wool fibers are composed of cuticle and cortex cells, which are of obvious differences in many properties. The development of methods to isolate the two kinds of cells can provide platform to elucidate the roles they play in the characteristics of wool fibers. Here we demonstrate the cuticle can be completely and rapidly removed from the wool fibers by the use of ionic liquids, with inner cortex intact. Confocal microscope, SEM and FTIR have been applied to study the wool fibers after cuticle removal. In contrast to the traditional/long physical or chemical separation routes (>14 h), our method is very rapid (<1 h). This work demonstrates the ability of ionic liquid as a novel, rapid and efficient media for cuticle/ cortex isolation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Rapid and effective cuticle removal from wool fibers using ionic liquid

et al. 2015

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“…The preparatory step for the isolation of cortical Similarly as Spei, they interpreted the lower temcells from wool is the removal of the cuticle layer. perature peak of the doublet at É 170ЊC (dT/dt A suitable method to obtain cuticle free (stripped) Å 5ЊC/min) as originating from melting or rather fibers has been described by Hü sken, 17 based on denaturation of the a-helical, crystalline material the approach of Wortmann et al 18 for the stripof wool keratin. The broad, higher temperature ping of coarser keratin fibers.…”

Section: Introductionmentioning

confidence: 99%

Thermal analysis of ortho‐ and para‐cortical cells isolated from wool fibers

Wortmann

Deutz

1998

J. Appl. Polym. Sci.

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ABSTRACT:The nature of the bimodal denaturation endotherm, which has been observed for some a-keratin materials, was investigated in order to evaluate the validity of the two conflicting theories to interpret the phenomenon. Ortho-and para-cortical cells were isolated from Merino wool and subjected to measurements by differential scanning calorimetry in water at elevated temperatures (80-170ЊC). The results show for the isolated cell fractions denaturation peaks at 138ЊC (ortho ) and 144ЊC (para ) that are with respect to their location and temperature difference in good agreement with the results obtained for the whole fiber material. The denaturation enthalpy of the para-(21 J/g) was found to be higher than of the ortho-cortical cells (17 J/g) in contrast to expectations from electron diffraction studies. The fact that both of these values are higher than for the whole fiber (15 J/g) is attributed to the removal of the cuticle prior and to the enzymatic digestion of some further material during cell separation. The results give unequivocal evidence for the validity of the ortho /parahypothesis for the interpretation of the endothermic denaturation doublet of keratins.

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Morphological and Macromolecular Structure

2002

Chemical and Physical Behavior of Human Hair

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Communications to the Editor

Cited by 15 publications

References 0 publications

Rapid and effective cuticle removal from wool fibers using ionic liquid

Rapid and effective cuticle removal from wool fibers using ionic liquid

Thermal analysis of ortho‐ and para‐cortical cells isolated from wool fibers

Morphological and Macromolecular Structure

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