Seminar

Seminar

Microgels: Can we control their internal structure?

  • POSTED DATE : 2016-04-15
  • WRITER : 관리자
  • HIT : 3572
  • DATE : 2016-04-19
  • PLACE : 화학관 330118호

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제  목 : Microgels: Can we control their internal structure?


연  사 : Prof.Imre Varga(Loránd Eötvös University, Budapest)


일  시 : 2016년 4월 19일(화) 오후 4시 30분


장  소 : 화학관 세미나실 (330118호실)

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Microgels: Can we control their internal structure?

Imre Varga

 

Coordinator of the Marie Curie Initial Training Network NanoS3.

Institute of Chemistry, Eötvös Loránd University, 1117 Budapest Pazmany s. 1/A, Hungary .

 

email: imo@chem.elte.hu

 

The synthesis and characterization of poly(N-isopropylacrylamide) - based multi-responsive microgel particles has attracted a significant interest in the last decade. They are considered as promising candidates in many applications ranging from heavy metal scavengers to diagnostic applications, and controlled drug delivery systems. However, the simple uniform structure of these particles presents a serious limitation in many respects e.g. resulting in limited colloid stability and loading and release characteristics. To meet the challenges of nanotechnology, there is compelling need to develop synthetic methods for controlling the internal structure of the nanogel beads.

 

I will provide a summary of our work related to the preparation, characterization and application of pNIPAm based microgel particles. I will present a novel approach for the synthesis of microgel beads with controlled internal structure. The method allows to control the radial distribution of co-monomers within the gel particles, thus facilitating the preparation of microgel beads e.g. with homogenous crosslink density distribution or with unique hydrophilic shells. The formed core/shell structures can be further utilized to create either hierarchical nanoparticles or 3D-structures. I will show a few examples for the formation of hierarchical structures based on either electrostatic or host/guest interactions.