TY  - THES
A1  - Mandel, Karl
T1  - Synthesis and Characterisation of Superparamagnetic Nanocomposite Particles for Water Purification and Resources Recovery
T1  - Synthese und Charakterisierung von superparamagnetischen Nanokompositpartikeln zur Wasserreinigung und Wertstoffrückgewinnung
N2  - Superparamagnetic nanocomposite microparticles, compromised of magnetite nanoparticles in a silica matrix, have been synthesised and surface-modified to act as adsorbers for substances (e.g. toxic heavy metals or valuable resources) dissolved in fluids like water. The particles can be used for a magnetic-extraction-assisted separation process of these target substances which thereby can be recovered from the fluid.
N2  - In der vorliegenden Arbeit wurden superparamagnetische Nanokomposit-Mikropartikel, bestehend aus Magnetitnanopartikeln in einer Silica-Matrix, hergestellt. Die Oberfläche der Partikel wurde modifiziert, so dass die Partikel als Adsorber für gelöste Substanzen (z.B. giftige Schwermetalle oder Wertstoffe) in Fluiden wie z.B. Wasser eingesetzt werden können. Mit Hilfe der Partikel kann eine Abtrennung und damit Rückgewinnung der Zielstoffe auf Basis eines Magnetseparationsprozesses durchgeführt werden.
KW  - Magnetisches Trennverfahren
KW  - Superparamagnetismus
KW  - Recycling
KW  - Wasserreinigung
KW  - Eisenoxide
KW  - Siliciumdioxid
KW  - Superparamagnetismus
KW  - Nano
KW  - Wertstoffrückgewinnung
KW  - Magnetseparation
KW  - superparamagnetism
KW  - nano
KW  - water purification
KW  - resources recovery
KW  - magnetic separation
KW  - Nanotechnologie
KW  - Synthese
KW  - Magnetismus
Y1  - 2013
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-81208
ER  - 
TY  - JOUR
A1  - Luxenhofer, Robert
A1  - Fetsch, Corinna
T1  - Thermal Properties of Aliphatic Polypeptoids
JF  - Polymers
N2  - A series of polypeptoid homopolymers bearing short (C1–C5) side chains of degrees of polymerization of 10–100 are studied with respect to thermal stability, glass transition and melting points. Thermogravimetric analysis of polypeptoids suggests stability to >200 °C. The study of the glass transition temperatures by differential scanning calorimetry revealed two dependencies. On the one hand an extension of the side chain by constant degree of polymerization decrease the glass transition temperatures (Tg) and on the other hand a raise of the degree of polymerization by constant side chain length leads to an increase of the Tg to a constant value. Melting points were observed for polypeptoids with a side chain comprising not less than three methyl carbon atoms. X-ray diffraction of polysarcosine and poly(N-ethylglycine) corroborates the observed lack of melting points and thus, their amorphous nature. Diffractograms of the other investigated polypeptoids imply that crystalline domains exist in the polymer powder.
KW  - peptoid
KW  - biomaterials
KW  - glass transition temperature
KW  - DSC
KW  - TGA
KW  - XRD
Y1  - 2013
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-96333
ER  -