101. Temperature-, pH-, and Magnetic-Field-Sensitive Hybrid Microgels
- Author
-
Volodymyr Boyko, Franziska Eckert, Sanchita Bhattacharya, and Andrij Pich
- Subjects
Materials science ,Polymers ,Surface Properties ,Composite number ,Nanoparticle ,Biomaterials ,Magnetics ,Colloid ,chemistry.chemical_compound ,Drug Delivery Systems ,X-Ray Diffraction ,medicine ,Nanotechnology ,General Materials Science ,Colloids ,Composite material ,Magnetite ,chemistry.chemical_classification ,Aqueous solution ,Temperature ,General Chemistry ,Polymer ,Hydrogen-Ion Concentration ,Ferrosoferric Oxide ,Models, Chemical ,Chemical engineering ,chemistry ,X-ray crystallography ,Solvents ,Nanoparticles ,Swelling ,medicine.symptom ,Gels ,Biotechnology - Abstract
We demonstrate a simple route for the preparation of novel hybrid particles with multiple sensitivities. Aqueous polymeric microgels are modified by magnetite nanoparticles in the preparation of temperature- and pH-sensitive hybrids with a high magnetic response. Up to 15 wt % of magnetite nanoparticles are loaded into microgels. The influence of the amount of magnetite in the microgel structure on the morphology and colloidal properties is discussed. The presence of the magnetite nanoparticles in the microgel decreases its degree of swelling and shifts the volume phase-transition temperature to higher values. Nanostructured composite films with controlled morphologies can be prepared by water evaporation and deposition of the hybrid microgels on a solid substrate.
- Published
- 2007