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This chapter reviews recent work on the synthesis of aqueous microgel particles by precipitation polymerization. Precipitation polymerization allows flexible control over important physicochemical properties of aqueous microgels, such as size distribution, surface charge, chemical composition, and microstructure. The microgel systems discussed in this review are mainly based on poly(N-isopropyl acrylamide)...
In the last decade, the synthesis of polymeric materials that respond to specific environment stimuli by changing their size has attracted widespread interest in both fundamental and applied areas of research. Hydrogels in dispersions are composed of randomly oriented, physically or chemically crosslinked hydrophilic or amphiphilic polymer chains. The synthesis of these gels at the nanoscale (nanogels...
Nano- and Microgels are predominantly prepared using radical polymerization techniques. This chapter reviews alternative approaches to microgel preparation based on addition reactions of functional oligomers and polymers. This allows preparation of microgels under physiological conditions and in the presence of biologically active molecules without affecting their function. This method is therefore...
The key features of applying radiation techniques to synthesize microgels is the additive-free initiation and an easy process control. Therefore, radiation methods are very suitable for applications in biosciences. Microgels with desired dimensions can be obtained simply by varying the experimental parameters such as concentration, radiation dose, or radiation temperature. By intramolecular cross-linking...
We review recent work on the use of “smart” microgel particles as “nanoreactors” for the immobilization of metal nanoparticles as well as enzymes. A general feature of the microgel systems under consideration is their ability to react to external stimuli such as the pH or temperature of the system. Special emphasis is given to our recent research work on thermosensitive core–shell microgel particles...
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