We prepared natural polymeric particles based on Tannic Acid (TA) in nano and micron dimensions using water oil micro emulsion polymerization/crosslinking method.1,2 The prepared poly(tannic acid) (p(TA)) particles were chemically modified for desired physical chemical and properties and morphologies. The abundant number of -OH functional groups in the structure of TA provided the opportunity for particle formation and post modification reactions for new functional groups. The polyphenolic structure of TA present many inherently superior characteristics such as a high antioxidant nature, and high amounts of active agents (drug, protein, growth hormones etc) loading and release characteristics. Moreover, metal ions such as Fe(II/III), Co(II), Ni(II), Cu(II) can be readily uptaked by p(TA) particles and reduced by the phenol groups in situ or by the use of reducing agents such as NaBH4.3 In this investigation, we also report the multiple use of p(TA) particles in biomedical and environment applications. Gallic acid (GA) is used as model drug, and used for loading and release studies from p(TA) particles. In addition to the use of p(TA) particles for metal ion absorption for environmental applications, metal nano particle prepared within p(TA) particles as composite were also used in catalytic applications such the reduction of 4 or 2-nitro phenols to 4 or 2-amino phenols. Various parameters affecting the biomedical and environmental application of p(TA) particles were investigated.1. Selin Sagbas, Sultan Butun, Nurettin Sahiner, Modifiable chemically crosslinked poli(-carrageenan) particles, Carbohydrate Polymers 87 (2012) 2718� 2724.2.Nurettin Sahiner, Preparation of poly(ethylene imine) particles for versatile applications, Colloids and Surfaces A: Physicochem. & Eng. Aspects, 433 (2013) 212-218.3.Nurettin Sahiner, Soft and flexible hydrogel templates of different sizes and various functionalities for metal nanoparticle preparation and their use in catalysis, Progress in Polymer Science 38 (2013) 1329� 1356.

Tannic acid based natural particle for versatile use

247th National Meeting (2014)

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