Product Properties Overview

Physical & Chemical Properties

Physical and chemical properties concerning the product portfolio of nano- and microspheres available at microParticles GmbH.

Properties	MF-Particles	PS-Particles	PMMA-Particles	Silica-Particles
Density	1,51 g/cm³	1,05 g/cm³	1,19 g/cm³	1,85 g/cm³
Refractive index	1.68	1.59	1.48	1.42
Particle diameter	300 nm – 12 µm	100 nm – 1000 µm	100 nm – 1000 µm	100 nm – 100 µm
Monodispersity	CV < 5%	CV < 5%	CV < 5%	CV < 5%
Particle shape	spherical	spherical	spherical	spherical
Surface charge	< pH5 anionic	anionic	anionic	anionic
Functional groups	methylol, imino	sulfate	sulfate	silanol
Hydrophilicity / Hydrophobicity	hydrophilic	hydrophobic	hydrophobic	hydrophilic
Crosslinking	crosslinked	non-crosslinked (crosslinked)	non-crosslinked (crosslinked)	crosslinked
Porosity	Non - porous	Non - porous	Non - porous	Non - porous
Temperature stability	to 250 °C	100 °C	100 °C	to 1000 °C
Mechanical strength	robust	robust	robust	robust
Solubility in acids and bases	insoluble	insoluble	insoluble	soluble in HF and bases
Stability in solvents without swelling	water, alcohols, all solvents and oils	water, low alcohols	water, DMSO, aliphatic hydrocarbons	water, alcohols, all solvents and oils
Biocompatibility	biocompatible	biocompatible	biocompatible	biocompatible