Preparation and application of biodegradable nanocomposite for cleaner leather processing

Nano-biocomposites are integrated systems that combine the functionalities of the each component together with new physico-chemical properties originated by their complexity. Such composite materials have primary importance in the area of leather processing for better property supplement as well as reduction of toxic waste, especially in post tanning where Chromium, salts, dyestuff residues, fatliquoring agents, syntans, vegetable tannins and other organic matters typically loads the environmental contamination measured by COD, BOD, TS, TDS and TSS. In this work, Hydroxyapatite (HA) based composite has been developed and utilised as a retanning agent. Here, we present the synthesis and characterisation of nanocomposite developed form hydroxyapatite nanoparticles surface tailored with Poly (lactide co-glycolide) (PLGA) co-polymer. The functionality provided by this hybrid composite makes it best suitable as a retanning agent for leather. They are employed not only for uniformity of leather but also for better coating of collagen fibrils with improved heat resistance and strength properties. These properties coupled with increased softness and fullness of leather suggests that HA-PLGA composite may potentially have a superior role in the leather application, especially as a retanning agent. Further, the developed bio-polymeric composite shows less environmental burden exploring the retanning process in a cleaner route. (C) 2017 Elsevier Ltd. All rights reserved.