Chitosan application on wool before enzymatic treatment

Abstract

ABSTRACT:The influence of a chitosan application on wool fabric before a treatment with a proteolytic enzyme has been investigated. The enzymatic treatment enhances whiteness and confers shrink resistance to wool, but an increase in the enzyme concentration leads to a detrimental effect on the physicomechanical properties. A chitosan treatment before the enzymatic treatment additionally improves the shrink resistance and increases the weight loss. To better investigate the role played by the chitosan, surface-related properties, such as the friction coefficient, the compressional behavior (compressibility, linearity of compression, and thickness), the wearing resistance (weight loss after abrasion), the bursting resistance (bursting strength and deformation), and surface topography, have been studied. The results suggest that the chitosan pretreatment reduces the damage caused by the subsequent enzymatic treatment. They also imply a protective effect of the bursting and wearing resistance, which prevent excessive weight loss due to abrasion. A significant influence of the wool fiber cell membrane complex on the surface-related properties has been demonstrated through regression analysis and scanning electron microscopy observations.

Effects of low temperature plasma on wool and wool/nylon blend dyed fabrics

“…Previous studies [15] observed some interfibre CHT bonding, which was assumed to prevent movement of fibres and reducing shrinkage. Such deposition of CHT on the wool fibre surface and interfibrillar bonding could prevent fibres escape the fabric structure, therefore exerting a protective function and preventing pilling formation.…”

Surface modification and preparation techniques for textile materials

“…1.9(d)), resulting in a smoother surface and deeper inter-fibrillar disintegration of the bundle. The influence of a chitosan application on wool fabric before a treatment with a proteolytic enzyme was investigated by Vílchez et al 39 The enzymatic treatment enhances whiteness and confers shrink resistance to wool, but an increase in the enzyme concentration leads to a detrimental effect on the physico-mechanical properties. A chitosan treatment before the enzymatic treatment was also found to improve the shrink resistance and increase the weight loss.…”

Development of durable shrink-resist coating of wool with sol-gel polymer processing

“…However, if not carefully controlled this enzymatic process can cause significant damage to the wool fibre due to the enzyme penetrating into and attacking the fibre core [2,3]. To restrict the enzyme attack to the cuticle scales and prevent damage to the fibre, methods of either modifying the treatment process [4][5][6][7] or enlarging the proteolytic enzyme by chemical [8][9][10] or genetic modification [11] have been investigated but a viable commercial process is not currently available.…”