Synthesis, Surface Activities and Anti-Bacterial Activity of (Copper and Nickel) Nanoparticles Stabilized by Cationic Thiol Polyurethane Surfactants

Ibrahim Abdelsalam Sabbah

doi:10.11648/j.mc.20180602.13

Abstract

A series of cationic polyurethane surfactant [PQ14, PQ16 and PQ18] were synthesized by the reaction of alkyl bromoacetate (namely: tetradecyl-, hexadecyl- and octadecyl bromoacetate) as quaternizing agents and modified polyurethane contains tertiary amine species. Modified polyurethane was prepared by the reaction of toluene diisocyanate (TDI) and Triethanol amine mono mercaptoacetate. Grinding method is used to synthesize copper and nickel nanoparticles which stabilized by Cationic Thiol polyurethane surfactants. The chemical structures of the prepared surfactants were confirmed using elemental analysis, FTIR, UV and 1H-NMR spectroscopy. The molecular weight measurements of the prepared polymers showed that the segments of each polymer contain average 10 units of the urethane-Triethanol amine mercaptoacetate. The surface activities of the prepared surfactants including: surface tension (g), effectiveness (πcmc), concentration at micelle formation (CMC), efficiency (Pc20), maximum concentration at the interface (Gmax), average area occupied by each surfactant molecule at the interface at equilibrium (Amin) of surfactants solutions were established at 25°C. The surface tension and the critical micelle concentration values of the prepared surfactants were gradually decreased by the gradual increase of their alkyl chain length. Antimicrobial activity of the synthesized cationic surfactants and their nanostructure with copper and nickel nanoparticles were evaluated against pathogenic bacteria and fungi. The antimicrobial activity showed the enhancement in the antimicrobial activity of the synthesized cationic surfactants in the nanostructures form.

Highlights

Polyurethanes are classified as one of the important polymers which participated in numerous purposes in almost all fabrications of nowadays life
That behavior is depending on the surface activities of these biocides
The synthesized cationic Thiol polyurethane surfactants and their nanoparticles were tested against different strain of bacteria using inhibition zone diameters and showed good antimicrobial activities against the tested microorganisms

Summary

Introduction

Polyurethanes are classified as one of the important polymers which participated in numerous purposes in almost all fabrications of nowadays life. The main raw materials for the production of polyurethanes are polyols, diisocyanates and propylene oxide. For the preparation of polyurethane polymers, two types of reactants are needed; bifunctional isocyanates compounds and active hydrogen compounds. Bifunctional isocyanates are used to produce long chain monolayer polymer systems. Trifunctional isocyanates e.g., tris (4-isocyanatophenyl) thiophosphate are used in production of network polyurethanes which have higher mechanical, thermal and chemical resistance properties. Polyols are used as hydrogen donating compounds [1]. Polyurethane nanoparticles were synthesized using several techniques such as suspension-poly condensation [2], interfacial poly condensation combined to Ibrahim Abdelsalam Sabbah et al.: Synthesis, Surface Activities and Anti-Bacterial Activity of (Copper and Nickel)

Methods

Results

Conclusion