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Review on additives-based structure-property alterations in dyeing of collagenic matrices

N. Singha,P. Chattopadhyay,Arnab Dutta,M. Mahapatra,Mousumi Deb

Published 2019 in Journal of Molecular Liquids

ABSTRACT

Abstract This review includes the variable physicochemical alterations in dyeing operations of collagenous matrices based on the several factors including the structural attributes, such as molecular weight, position and number of –SO3H, –NH2, –OH, and –Cl groups, tautomerism, number of chromophores, planarity, H-/J-aggregate, and number of benzene or naphthalene rings, of different classes of leather dyes used nowadays, along with the characteristics of the fibrous protein network, such as pore size, fiber density, and angle of weave, consisting of tropocollagen and other secondary structures, non-collagenous interfibrillar materials, and leather auxiliaries. Besides, the review encompasses the influences of various physical and/or chemical operation(s) in penetration, distribution, allocation, and fixation of dyes in collagenic matrices. Additionally, the roles of dyeing auxiliaries and different types of fixing agents in dispersion, distribution, and binding of dyes with fibrous protein have been thoroughly discussed. Notably, several factors relating to the probable allocations of the dyes in collagenic matrices have been highlighted, considering aggregating tendency, size, planarity, and dihedral space of individual dyes, along with macro, meso, and micro pores of tropocollagen. Importantly, the dyeing phenomena and associated physicochemical interactions among dyes and collagenic materials have been analyzed by the results derived from various interrelated characterization techniques.

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