Ulama, Jeanette; Zackrisson Oskolkova, Malin; Bergenholtz, Johan
Monodisperse PEGylated Spheres: An Aqueous Colloidal Model System
Fluorinated core?shell spheres have been synthesized using a novel semibatch emulsion polymerization protocol employing slow feeding of the initiator. The synthesis results in aqueous dispersions of highly monodisperse spheres bearing a well-defined poly(ethylene glycol) graft (PEGylation). Measurements are consistent with the synthesis achieving a high grafting density that moreover consists…
Influence of the Main-Chain Configuration on the Mechanical Properties of Linear Aliphatic Polyesters
Pepels, Mark P. F.; Govaert, Leon E.; Duchateau, Rob
Linear aliphatic polyesters have been investigated extensively over the last decades. However, the relation between the configuration of the ester groups in the main chain and the mechanical properties is only poorly understood. Therefore, in this work the influence of the composition of these polymers on the morphology, mechanical properties…
Solvothermal synthesis of hierarchical Eu 2 O 3 nanostructures templated by PS-b-PMAA: morphology control via simple variation of water contents
Xiao, Ying; Wang, Xiaoyan; Wagner, Thomas; Thiel, Jürgen; Yao, Yuan; Lin, Yichao; Metwalli, Ezzeldin; Liu, Rui; Butt, Hans Jürgen; Müller-Buschbaum, Peter; others
Journal of Materials Chemistry A, 2015, vol 3, 11, pp. 5789–5793DOI:Visit the full articleBack to the overview
Mechanically induced tilt in smectic-A elastomers
Kramer, Dominic; Finkelmann, Heino
Recently it has been predicted that shear forces can unlock the director and the layer normal in smectic-A elastomers, leading to a smectic-C like tilt analogous to the electroclinic effect of chiral SA* phases. In order to investigate this phenomenon, we present detailed X-ray investigations of SA elastomers under shear,…
Shear deformation and ferroelectricity in chiral SmC* main-chain elastomers
Heinze, Patrick; Finkelmann, Heino
Macromolecules, 2010, vol 43, 16, pp. 6655–6665DOI:Visit the full articleBack to the overview
Orientation behaviour of the minor director of homeotropically oriented nematic elastomers in mechanical fields
Brömmel, F.; Benzie, P.; Osterwinter, G. J.; Kramer, D.; Finkelmann, H.; Elston, S.; Hoffmann, A.
Soft Matter, 2013, vol 9, 9, pp. 2646–2651DOI:Visit the full articleBack to the overview
Simultaneous SAXS/WAXS/UV–Vis Study of the Nucleation and Growth of Nanoparticles: A Test of Classical Nucleation Theory
Chen, Xuelian; Schröder, Jan; Hauschild, Stephan; Rosenfeldt, Sabine; Dulle, Martin; Förster, Stephan
Despite the increasing interest in the applications of functional nanoparticles, a comprehensive understanding of the formation mechanism starting from the precursor reaction with subsequent nucleation and growth is still a challenge. We for the first time investigated the kinetics of gold nanoparticle formation systematically by means of a lab-based in…
Co-assembly, spatiotemporal control and morphogenesis of a hybrid protein–peptide system
Inostroza-Brito, Karla E.; Collin, Estelle; Siton-Mendelson, Orit; Smith, Katherine H.; Monge-Marcet, Amàlia; Ferreira, Daniela S.; Rodríguez, Raúl Pérez; Alonso, Matilde; Rodríguez-Cabello, José Carlos; Reis, Rui L.; Sagués, Francesc; Botto, Lorenzo; Bitton, Ronit; Azevedo, Helena S.; Mata, Alvaro
Controlling molecular interactions between bioinspired molecules can enable the development of new materials with higher complexity and innovative properties. Here we report on a dynamic system that emerges from the conformational modification of an elastin-like protein by peptide amphiphiles and with the capacity to access, and be maintained in, non-equilibrium…
Die-drawn HDPE pipes: Crystalline and Lamellae Orientation
Kleppinger, Ralf; Taraiya, Ajay; Handstanger, Ralph; Soliman, Maria
It is well known that mechanical properties of isotropic polymer systems, such as tensile modulus and strength, can be considerably improved by orientation of chain molecules. This can be achieved by deforming the polymer in the solid-state via die-drawing, resulting in orientation in tow rather than one direction only, resulting…
Bio-based barrier materials
Kleppinger, Ralf; Martens, Hans; Tandler, Renate; Soliman, Maria
Multilayered polyolefin-based film systems are being used in packaging industry to add various functionalities by tailoring layer sequences, thickness and type of the material used in the final application. A new concept based on carbohydrates had been investigated and confirmed that similar functionality may be obtained compared to EVOH which…