TY  - JOUR
U1  - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed)
A1  - Steinbach, Julia
A1  - Fait, Fabio
A1  - Mayer, Hermann
A1  - Kandelbauer, Andreas
T1  - Monodisperse porous silica/polymer nanocomposite microspheres with tunable silica loading, morphology and porosity
JF  - International journal of molecular sciences
N2  - Hybrid organic/inorganic nanocomposites combine the distinct properties of the organic polymer and the inorganic filler, resulting in overall improved system properties. Monodisperse porous hybrid beads consisting of tetraethylene pentamine functionalized poly(glycidyl methacrylateco-ethylene glycol dimethacrylate) particles and silica nanoparticles (SNPs) were synthesized under Stoeber sol-gel process conditions. A wide range of hybrid organic/silica nanocomposite materials with different material properties was generated. The effects of n(H2O)/n(TEOS) and c(NH3 ) on the hybrid bead properties particle size, SiO2 content, median pore size, specific surface area, pore volume and size of the SNPs were studied. Quantitative models with a high robustness and predictive power were established using a statistical and systematic approach based on response surface methodology. It was shown that the material properties depend in a complex way on the process factor settings and exhibit non-linear behaviors as well as partly synergistic interactions between the process factors. Thus, the silica content, median pore size, specific surface area, pore volume and size of the SNPs are non-linearly dependent on the water-to-precursor ratio. This is attributed to the effect of the water-to-precursor ratio on the hydrolysis and condensation rates of TEOS. A possible mechanism of SNP incorporation into the porous polymer network is discussed.
KW  - sol-gel processing
KW  - rational design
KW  - response surface methodology
KW  - design of experiment
KW  - porous microspheres
KW  - nanocomposites
Y1  - 2022
UN  - https://nbn-resolving.org/urn:nbn:de:bsz:rt2-opus4-40448
SN  - 1422-0067
SS  - 1422-0067
U6  - https://doi.org/10.3390/ijms232314977
DO  - https://doi.org/10.3390/ijms232314977
VL  - 23
IS  - 23
SP  - 22
S1  - 22
PB  - MDPI
CY  - Basel
ER  -