The influence of water, lanolin, urea, proline, paraffin and fatliquor on collagen D-spacing in leather

Sizeland, Katie H.; Wells, Hannah C.; Kelly, S. J.; Edmonds, Richard L.; Kirby, Nigel; Hawley, Adrian; Mudie, Stephen; Ryan, Tim; Haverkamp, Richard G.

doi:10.1039/c7ra05560a

Cited by 14 publications

(12 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This implies that fatliquoring is the most destructive crusting process to the leather uniformity. This observation corroborates the results by Sizeland et al [41] and Dutta [42]; penetration of fatliquors into leather increases looseness, softness and pliability.…”

Section: Effect Of Crusting Processes On Leather's Anisotropy and Unisupporting

confidence: 93%

“…Fatliquored samples were softer, loose in structure and more pliable compared to other samples. Our observations agree with results in [41]. Reference [42] observed that penetration of fatliquors into leather increases its looseness.…”

Section: Effect Of Fatliquoring On Organoleptic and Physical Propertisupporting

confidence: 93%

“…Low or poor adhesion between the crust matrix and fatliquors can explain the decrease in tensile strength and shrinkage temperature while supporting the explanation for increase in extensibility and tear strength [54][55]. As humectants, findings from Synchrotron scattering experiments have shown that fatliquors enhance water-retention capacity in the collagen [41]. The high hydration level which is the reason for increased d-spacing of collagen also affects the physical properties.…”

Section: Effect Of Fatliquoring On Organoleptic and Physical Propertimentioning

confidence: 69%

“…We also hypothesized the mechanism whereby the oily nature of dyes in collagen imparts water retention ability. The polar or amphoteric nature of dyes has also been associated with level of hydration which also increases collagen's D-spacing [41]. The increased D-spacing leaves more free volume for water attachment.…”

Section: Effect Of Dyeing On Mechanical Properties Of Leathermentioning

confidence: 99%

“…Be it as it may, the authors explained the decrease of tensile strength and shrinkage temperature and increase of tear strength, elasticity and distension, in three ways. The explanations modeled fatliquors in the collagen network as primary plasticizers, secondary plasticizers and humectants [41,[52][53]. As primary plasticizers, the synthetic sulphated oils used in this study are anionic colloids with large molecules carrying a negative charge.…”

Section: Effect Of Fatliquoring On Organoleptic and Physical Propertimentioning

confidence: 99%

See 4 more Smart Citations

Effect of Crusting Operations on the Physical Properties of Leather

Nalyanya¹,

Rop²,

Onyuka³

et al. 2018

LFJ

View full text Add to dashboard Cite

Physical properties of leather form vital quality parameters that determine the performance characteristics in their areas of applications. However, the transformational processing of hide to leather involves a series of both chemical and physical/mechanical changes that affect these mechanical properties. Many researches have been published regarding the effect of processing on the mechanical properties of leather. However, the effect of entire crusting operations (post tanning) on the mechanical properties is not documented. This study reports the findings of the effect of crusting operations (retanning, dyeing and fatliquoring) on the mechanical properties of the final leather. Results have shown that retanning process improves tear and tensile strengths, distensions at crack and burst, and shrinkage temperature. An improvement in the organoleptic properties such as fullness was recorded in retanned crust leather. However, the uniformity coefficient and percentage elongation significantly decreased after retanning. Dyeing raises the elongation at break, distensions at crack and burst, shrinkage temperature and uniformity coefficient whereas both tensile and tear strengths decreased after dyeing. Similarly, fatliquored samples recorded higher elongation at break values, and distension values. Conversely, tensile and tear strengths, shrinkage temperature and uniformity coefficient decreased as a result of fatliquoring process. All the samples tested at tanning, retanning, dyeing and fatliquoring processes indicated no damage at 50,000 flexes. The study discussed these effects using transmission of fracture and damage mechanics in leather, structural implication of the resulting leather and existing models of materials. KEYWORDS: physical properties, crusting operations, leather anisotropy and uniformity, fracture and damage mechanics, micromechanical deformation, stress concentration EFECTUL OPERAŢIUNILOR DE FINISARE UMEDĂ ASUPRA PROPRIETĂŢILOR MECANICE ALE PIELIIREZUMAT. Proprietăţile fizice ale pielii constituie parametri de calitate importanţi care determină caracteristicile de performanţă ale pielii în domeniile în care vor fi utilizate. Cu toate acestea, transformarea pieii crude în piele finită implică o serie de modificări chimice şi fizicomecanice care afectează proprietăţile mecanice ale pielii. Au fost publicate multe cercetări privind efectul prelucrării asupra proprietăţilor mecanice ale pielii. Cu toate acestea, efectul ansamblului de operaţiuni de finisare umedă (post-tăbăcire) asupra rezistenţei mecanice nu este documentat. Acest studiu prezintă constatările privind efectul operaţiunilor de finisare umedă (retăbăcire, vopsire şi ungere) asupra proprietăţilor mecanice ale pieii finite. Rezultatele au arătat că procesul de retăbăcire îmbunătăţeşte rezistenţa la rupere şi la sfâşiere, alungirea la crăpare şi rupere şi temperatura de contracţie. S-a înregistrat o îmbunătăţire a proprietăţilor organoleptice, cum ar fi plinătatea, la pielea retăbăcită şi finisată umed. Cu toate acestea, coeficientul de ...

show abstract

Section: Effect Of Crusting Processes On Leather's Anisotropy and Unisupporting

confidence: 93%

Section: Effect Of Fatliquoring On Organoleptic and Physical Propertisupporting

confidence: 93%

Section: Effect Of Fatliquoring On Organoleptic and Physical Propertimentioning

confidence: 69%

Section: Effect Of Dyeing On Mechanical Properties Of Leathermentioning

confidence: 99%

Section: Effect Of Fatliquoring On Organoleptic and Physical Propertimentioning

confidence: 99%

See 3 more Smart Citations

Effect of Crusting Operations on the Physical Properties of Leather

Nalyanya¹,

Rop²,

Onyuka³

et al. 2018

LFJ

View full text Add to dashboard Cite

show abstract

Role of X‐ray Scattering Techniques in Understanding the Collagen Structure of Leather

et al. 2019

View full text Add to dashboard Cite

This review focuses on the SAXS and WAXS analysis of the collagen structure of leather, from pioneering works through to recent developments. X-ray scattering can be used to investigate the structural features of fibrillar collagen in the leather matrix, including axial periodicity, fibril diameter, chemical fixation, hydration and fibrillar orientation. Key properties of leather, such as appearance, handle, strength, hydrothermal stability and resistance to putrefaction, are closely linked to these parameters, thereby underlining the importance of Xray scattering to the study of leather. Recent research on the molecular level changes in collagen structure at different stages of leather processing with a range of treatments is also summarized. We will highlight how studies using X-ray scattering techniques have provided significant insights into tanning processes which could be used to improve leather properties and optimize/reduce the use of tanning agents such as chromium (III) in the industry. The review will also describe the details of collagen structure and tanning mechanisms that are yet to be determined by X-ray scattering, as well as future advancements of this technique and what it can accomplish for the leather industry.

show abstract

In Vitro Study for Use of Cactus Gel in Enhancing the Mechanical Strengths of Vegetable Tanned Leathers Under Accelerated Aging

Hassan

2019

Int. J. Precis. Eng. Manuf.

View full text Add to dashboard Cite

The influence of water, lanolin, urea, proline, paraffin and fatliquor on collagen D-spacing in leather

Abstract: Water, lanolin and Lipsol interact with collagen to alter the structure at the fibrillar scale.

Cited by 14 publications

References 21 publications

Effect of Crusting Operations on the Physical Properties of Leather

Effect of Crusting Operations on the Physical Properties of Leather

Role of X‐ray Scattering Techniques in Understanding the Collagen Structure of Leather

In Vitro Study for Use of Cactus Gel in Enhancing the Mechanical Strengths of Vegetable Tanned Leathers Under Accelerated Aging

Contact Info

Product

Resources

About