Macromolecular Materials and Engineering
Copyright © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Materials Science Weekly Newsletter
Recently Published Articles
- Latent CO2-Protected N-Heterocyclic Carbene-Based Single-Component System-Derived Epoxy/Glass Fiber Composites
Michael R. Buchmeiser, Jochen A. Kammerer, Stefan Naumann, Jörg Unold, Ravand Ghomeshi, Sathis K. Selvarayan, Patrick Weichand and Rainer Gadow
Article first published online: 30 APR 2015 | DOI: 10.1002/mame.201500090
Single-component bisphenol-A-diglycidyl ether/hexahydrophthalic anhydride-based fiber–matrix composites are described. Using 1,3-dicyclohexyl-3,4,5,6-tetrahydropyrimidinium carboxylate as latent pre-catalyst, a curing system with pot times >>two weeks is obtained that can be used for thermal curing under air and for vacuum-assisted resin infusion and which outrivals commercial amine-based hardeners both in terms of performance and speed of curing.
- Preparation and Reinforcement of Dual-Porous Biocompatible Cellulose Scaffolds for Tissue Engineering
Nicole Pircher, David Fischhuber, Leticia Carbajal, Christine Strauß, Jean-Marie Nedelec, Cornelia Kasper, Thomas Rosenau and Falk Liebner
Article first published online: 28 APR 2015 | DOI: 10.1002/mame.201500048
Cellulose-based aerogels are promising scaffolding materials for tissue engineering applications. However, lack of large, micron-size pores >100 μm and insufficient stability hitherto prevented the development of commercial products. Robust, biocompatible aerogels of controlled interconnected dual-porosity have been prepared applying temporary templates of fused porogens and supercritical fluid techniques.
- Water Whitening Reduction in Waterborne Pressure-Sensitive Adhesives Produced with Polymerizable Surfactants
Ziortza Aguirreurreta, Jörg-Alexander Dimmer, Immanuel Willerich, José C. de la Cal and Jose R. Leiza
Article first published online: 28 APR 2015 | DOI: 10.1002/mame.201500035
Water whitening resistance of pressure-sensitive adhesives is studied. Water whitening is reduced when the synthesis of the acrylic dispersion is conducted at acidic pH and then the latex is neutralized before the film formation. Using polymerizable surfactants or stabilizers, water whitening resistance is improved due to their incorporation into the polymer backbone, and hence reduced surfactant migration.
- Template-Assisted Preparation of Permeable Nanocapsules from Complementary Cyclodextrin and Adamantane–Appended Biocompatible Dextran Polymers
Ewelina Wajs, Thorbjørn Terndrup Nielsen, Kim Lambertsen Larsen and Alex Fragoso
Article first published online: 28 APR 2015 | DOI: 10.1002/mame.201500057
The fabrication of nanosized capsules self-assembled via supramolecular interactions between specially designed complementary polymers on a sacrificial solid template is reported. The alternate deposition of cyclodextrin and adamantane appended dextran polymers on gold nanoparticles is demonstrated, followed by oxidative core dissolution yielding well-ordered, stable, and size-controlled nano-architectures, which are able to encapsulate small molecules with a good stability for several weeks in solution.
- Fracture Behaviors of TRGO-Filled Epoxy Nanocomposites with Different Dispersion/Interface Levels
Jing Zang, Yan-Jun Wan, Li Zhao and Long-Cheng Tang
Article first published online: 28 APR 2015 | DOI: 10.1002/mame.201400437
Fracture behaviors of TRGO-filled epoxy composites with different dispersion/interface levels were investigated. Improved dispersion/interface level in the TRGO/epoxy composites was achieved through using a facile surfactant treatment processing. Several failure mechanisms, e.g., crack bridging, pull-out/debonding and fracture of TRGO, and local plastic deformation of matrix, were identified and correlated to increased tensile strength and fracture toughness of the two composite systems.