TY - JOUR

T1 - Copolymerization of Mesoporous Styrene-Bridged Organosilica Nanoparticles with Functional Monomers for the Stimuli-Responsive Remediation of Water

AU - Kollofrath, Dennis

AU - Geppert, Marcel

AU - Polarz, Sebastian

N1 - Funding Information: We gratefully acknowledge technical/instrumental support from the German Research Foundation (DFG) via SFB1214 Project Z1 Particle Analysis Center and the Nanolab of the University of Konstanz. Open access funding enabled and organized by Projekt DEAL.

PY - 2020/9/24

Y1 - 2020/9/24

N2 - For every mass product, there are problems associated with the resulting waste. Residues of hormones in urine cannot be removed sufficiently from wastewater, and this has undesired consequences. An ideal adsorbent would take up the impurity, enable a simple separation and recyclability. Polymer colloids with high affinity towards the drug, accessible porosity, high surface area, and stimuli-responsive properties would be candidates, but such a complex system does not exist. Here, porous vinyl-functionalized organosilica nanoparticles prepared from a styrene bridged sol-gel precursor act as monomers. Initiation of the polymerization at the pore walls and addition of functional monomers result in a special copolymer, which is covalently linked to the surface and covers it. An orthogonal modification of external surface was done by click attachment of a thermoresponsive polymer. The final core-shell system is able to remove quantitatively hydrophobic molecules such as the hormone progesterone from water. A change of temperature closes the pores and induces the aggregation of the particles. After separation one can reopen the particles and recycle them.

AB - For every mass product, there are problems associated with the resulting waste. Residues of hormones in urine cannot be removed sufficiently from wastewater, and this has undesired consequences. An ideal adsorbent would take up the impurity, enable a simple separation and recyclability. Polymer colloids with high affinity towards the drug, accessible porosity, high surface area, and stimuli-responsive properties would be candidates, but such a complex system does not exist. Here, porous vinyl-functionalized organosilica nanoparticles prepared from a styrene bridged sol-gel precursor act as monomers. Initiation of the polymerization at the pore walls and addition of functional monomers result in a special copolymer, which is covalently linked to the surface and covers it. An orthogonal modification of external surface was done by click attachment of a thermoresponsive polymer. The final core-shell system is able to remove quantitatively hydrophobic molecules such as the hormone progesterone from water. A change of temperature closes the pores and induces the aggregation of the particles. After separation one can reopen the particles and recycle them.

KW - core-shell particles

KW - drug removal

KW - mesoporous materials

KW - organic-inorganic hybrids

KW - water

UR - http://www.scopus.com/inward/record.url?scp=85089258653&partnerID=8YFLogxK

U2 - 10.1002/cssc.202001264

DO - 10.1002/cssc.202001264

M3 - Article

C2 - 32662565

AN - SCOPUS:85089258653

VL - 13

SP - 5100

EP - 5111

JO - ChemSusChem

JF - ChemSusChem

SN - 1864-5631

IS - 18

ER -