Incorporation of superparamagnetic nanoparticles into poly(urea-urethane) nanoparticles by step growth interfacial polymerization in miniemulsion

[Display omitted] •Magnetite magnetic nanoparticles coated with oleic acid (MNPs-OA) were synthesized.•MNPs-OA were incorporated in poly(urea-urethane) NPs by interfacial polymerization.•Increasing the content of MNPs-OA increased PUU particle diameter.•After encapsulation, magnetic PUU NPs presente...

Full description

Saved in:
Bibliographic Details
Published in:Colloids and surfaces. A, Physicochemical and engineering aspects Physicochemical and engineering aspects, 2015-10, Vol.482, p.596-603
Main Authors: Chiaradia, Viviane, Valério, Alexsandra, Feuser, Paulo E., Oliveira, Débora de, Araújo, Pedro H.H., Sayer, Claudia
Format: Article
Language:English
Subjects:
Encapsulation
Magnetic nanoparticles
Miniemulsion polymerization
Poly(urea-urethane)
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:[Display omitted] •Magnetite magnetic nanoparticles coated with oleic acid (MNPs-OA) were synthesized.•MNPs-OA were incorporated in poly(urea-urethane) NPs by interfacial polymerization.•Increasing the content of MNPs-OA increased PUU particle diameter.•After encapsulation, magnetic PUU NPs presented superparamagnetic behavior. Superparamagnetic materials encapsulated in a polymeric matrix are interesting for several applications, including biomedical, separation, and biotechnology and enzyme immobilization. In this work, superparamagnetic poly(urea-urethane), PUU, nanoparticles were obtained by interfacial miniemulsion polymerization. Magnetite nanoparticles presenting superparamagnetic behavior were obtained by co-precipitation method and after the synthesis the magnetic nanoparticles, MNPs, were coated with oleic acid, OA, to provide a hydrophobic surface. The synthesis of PUU nanoparticles was performed using 1,6-hexanediol as polyol and IPDI as diisocyanate. The MNPs-OA were incorporated in-situ during the interfacial miniemulsion polymerization. PUU with MNPs-OA were characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, electromagnetic vibrating sample magnetometry, VSM, and transmission electron microscopy. Results show a high encapsulation efficiency and VSM analysis showed that PUU with MNPs-OA still presented superparamagnetic behavior after the encapsulation step.
ISSN:0927-7757
1873-4359
DOI:10.1016/j.colsurfa.2015.06.035