Beads microgel

Poncelet, D. et ah. Formation of microgel beads by electrostatic dispersion of polymer solutions, AIChE /., 45, 2018, 2003. 

Fig. 1.5 Connectivity of microgel particles within macroporous resin beads showing formation of small pores, A, from a network of...

Abstract Molecular imprinting has grown considerably over the last decade with more and more applications being developed. The use of this approach for the generation of enzyme-mimics is here reviewed with a particular focus on the most recent achievements using different polymer formats such as microgels and nanogels, beads, membranes and also silica nanoparticles. 

Applying this technique, calcium cross-linked alginate spheres can be used as targets for the radiation cross-linking of PVME to obtain PVME microgel particles [46], The dimension of the PVME particles is defined by the droplet size of the alginate beads. For the synthesis, PVME is incorporated into alginate beads... 

D. Poncelet, V. Babak, R. Neufeld, M. Goosen, and B. Burgarski. Theory of electrostatic dispersion of polymer solutions in the production of microgel beads containing biocatalyst. Advances in Colloid and Interface Science, 79(23) 213-228, 1999. 

This vibration system involves a Turbotak air-atomizer in which a pressurized air is injected to mix with the sodium alginate solution. Pressurized air forces the minute liquid droplets out through the orifice of a nozzle and is sprayed into the calcium chloride solution. When these droplets come in contact with calcium chloride solution, calcium ions diffuses into the droplets of sodium alginate, which leads to form microgel droplets. Hydrogel particles thus formed can be further reinforced by poly-L-lysine or chitosan to form a membrane on the droplets. The particle size of hydrogel beads can be obtained in the range of 5 and 15 pm by the use of air atomization technique. ... 

Microgel Polystyrenes. Microgels are soluble polymers with a certain degree of cross-linking, but can be precipitated using an appropriate solvent (51). Beads with a diameter of 5-25 /um can be prepared by radical dispersion polymerization in the presence of a surfactant. 

A combination of self-adhesive Eudragit E film with antibacterial drug-loaded polyisopropyl acrylamide microgel beads was designed as a wound dressing. The influence of microgel beads on tack properties was determined. 24 refs. 

Oral delivery drug by alginic acid beads Alg microgel beads (50 jm)... 

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