A Novel Preparation of Blankophor R Nanoparticles by Reverse Microemulsion Method

Abstract

Blankophor R is an organic compound and a stilbene type of fluorescent whitening agent (FWA). In this research, the preparation of Blankophor R was successfully synthesized using a nucleophilic substitution reaction withphenyl-isocyanate based on 4,4′-diamino-stilbene-2,2′-disulfonic acid. The structure of Blankophor R and its intermediates were characterized by spectroscopy techniques. In addition we reported a Blankophor R synthesis of Blankophor R nanoparticles in Reverse microemulsion method. The optimized formulation contains (w/w): water 20%, n-butyl acetate 50%, cetyltrimethylammonium bromide 10%, and isopropanol 20% and Blankophor R in water (%): 0.5. As a result, the microemulsion system was prepared clear, homogeneous and thermodynamically stable. The obtained Blankophor R nanoparticles showed spherical shape with an average diameter 60 nm, based on SEM and TEM images. In this work, the effect of Blankophor R NPs on dye transfer inhibition (DTI) were showed a high stability, leading to excellent DTI effects.

Keywords:

• Blankophor R
• diameter
• fluorescent whitening agent
• microemulsion

Additional information

Funding

The author gratefully acknowledges the financial support of this work by the Research Affairs Office of the Islamic Azad University, Qom Branch, Qom, I. R. Iran (grant number 2014-13929).