Macromolecular Materials and Engineering
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Materials Science Weekly Newsletter
Recently Published Articles
- Influence of Drawing on the Antimicrobial and Physical Properties of Chlorhexidine-Compounded Poly(caprolactone) Monofilaments
Roberto Scaffaro, Luigi Botta, Giuseppe Gallo and Anna Maria Puglia
Article first published online: 27 JUL 2015 | DOI: 10.1002/mame.201500121
The antimicrobial activity of PCL monofilaments, to be applied in prospective as threads for surgical sutures, can be modulated and controlled by appropriately setting the spinning parameters. Moreover, by modulating the drawing conditions it is also possible to change the mechanical performances of the antimicrobial filaments.
- Electrospinning of p-Aramid Fibers
Jian Yao, Junhong Jin, Emiliano Lepore, Nicola M. Pugno, Cees W.M. Bastiaansen and Ton Peijs
Article first published online: 21 JUL 2015 | DOI: 10.1002/mame.201500130
It is expected that thinner fibers would experience higher levels of elongational flow and better molecular orientation, leading to higher mechanical properties. For the PPTA system, a 20-fold increase in Young's modulus is seen with decreasing fiber diameter. This diameter effect is far greater than values reported for electrospun nanofibers based on flexible chain polymers (typically 2–4), and highlights the potential of rigid rod polymers to create high-performance electrospun nanofibres.
- Oriented Poly(lactic acid)/Carbon Nanotube Composite Tapes with High Electrical Conductivity and Mechanical Properties
Fang Mai, Hua Deng, Wei Tu, Sayamol Chankajorn, Qiang Fu, Emiliano Bilotti and Ton Peijs
Article first published online: 16 JUL 2015 | DOI: 10.1002/mame.201500163
An overall good balance of physical properties of the oriented PLA/MWNT tapes with one of the best compromises in terms of high mechanical properties (5.5 GPa in Young's modulus, 156 MPa in tensile strength) and electrical properties (3.5 × 105 Ωm in resistivity) for conductive polymer composite fibers or tapes is obtained in present work.
- Solvent-Free Preparation of Electrically Conductive Polyetherimide Membranes Using Carbon Nanotubes
Christian Otto, Ulrich A. Handge, Ortrud Aschenbrenner, Juliane Kerwitz, Clarissa Abetz and Volker Abetz
Article first published online: 15 JUL 2015 | DOI: 10.1002/mame.201500088
Sintering is applied as a solvent-free process to produce electrically conductive membranes by using polyetherimide powder particles which are covered by multi-walled carbon nanotubes. The porous membranes show a high electrical conductivity. The displacement of the carbon nanotubes during sintering and their impact on rheological properties, sintering behavior, electrical conductivity and membrane morphology is discussed.
- Simple Synthesis of Reactive and Nanostructure Forming Hydrophobic Amino Cellulose Derivatives
Martin Obst and Thomas Heinze
Article first published online: 14 JUL 2015 | DOI: 10.1002/mame.201500144
Amino celluloses are of great interest in current research due to their ability to form supramolecular architectures. In this work, a simple one-pot synthesis for hydrophobic amino celluloses is presented. Tosyl cellulose is reacted simultaneously with ethylene diamine and 4-chlorobenzylamine, leading to organo-soluble products that form nanoparticles. Labeling of the derivatives with FITC enables their application in biomedical diagnostics.