Optical micrographs of colored beads, assembled at the air/water interface on
foam bubbles(blue: PS 4 µm, red: PS/PMMA 5.5 µm; diameter of the bubbles approx. 300 µm).
- Size range from 500 nm to 1000 µm.
- Dark blue, dark red and black colors available.
- Narrow size distribution (CV < 3 %).
- High lot-to-lot reproducibility.
- Spherical particles with smooth surface.
- Surface functionalities (carboxyl, amino, and epoxy groups) available on request.
Recently, microParticles has developed a new generation of carboxyl-functionalized monodisperse melamine resin (MF) microspheres. Using innovative surface polymerization techniques, functionalized beads with low, medium, or high density of carboxyl groups with up to 1000 µmole/g can be obtained. The new product line can be supplied with diameters from 1 to 12 µm. Combining advantageous material properties of MF with the newly achieved functionalization, these particles enter completely new applications, e.g. in Life Sciences. Main features of these carboxyl-modified microspheres are:
- Excellent chemical resistance and thermal stability.
- High density (1.5 g/cm3).
- Good solvent stability.
- High mechanical strength.
- Narrow particle size distribution.
- High colloidal stability.
- Covalent coupling of biologands, e.g. streptavidin, possible.
- Can be handled in dry powder form.