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Progress in the Field of Water- and/or Temperature-Triggered Polymer Actuators

S. Agarwal, S. Jiang, Y. Chen

Macromol. Mater. Eng., 2018, 1800548

Review_Polymer_Actuators

Water- and/or temperature-triggered polymer actuators have great potential in robotics, microfabrication and micromanipulation, cell culture, artificial scaffolds, muscles, and motors. In the past few years, a large amount of work has been carried out, and several innovative concepts have been proposed to address challenges such as actuation with large-scale displacement in a very short time, actuation of large-sized samples, complex 3D shaping, directional control, multiresponsive actuation, and strong actuators. Herein, the progress made in the field of actuators triggered by water, temperature, and a combination of both is presented, emphasizing the new concepts of fast and direction-controlled actuation, the corresponding mechanisms, the associated challenges, and future tasks and perspectives.

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New Review  by S. Jiang, Y. Chen, G. Duan, C. Mei, A. Greiner & S. Agarwal published in Polymer Chemistry

"Electrospun nanofiber reinforced composites: a review''

DOI: 10.1039/C8PY00378E

Review_Electrospun_nanofibers_composites

Welcome to Macromolecular Chemistry II

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Perfektion ist erreicht, nicht, wenn sich nichts mehr hinzufügen lässt, sondern, wenn man nichts mehr wegnehmen kann. (Antoine de Saint-Exupery) (Perfection is achieved, not when nothing more can be added, but when nothing more can be taken away (Antoine de Saint-Exupery))


"Die reinste Form des Wahnsinns ist es, alles beim Alten zu lassen und gleichzeitig zu hoffen, dass sich etwas ändert. (The sheerest madness is to leave everything the way it is and to simultaneously hope that something will change)" Albert Einstein


"The fate of genius is to be misunderstood, but not everything is a misunderstood genius" Ralp Waldo Emmerson (1803-1882)


"Facts do not cease to exist because they are ignored” (Aldous Huxley, author of Brave New World)


"Die Ablehnung Unwichtiges zu tun, ist eine entscheidende Voraussetzung für den Erfolg“ Sir Alexander MacKenzie


"An idea that is not dangerous is unworthy of being called an idea at all“ von Oscar Wilde (Eine Idee, die nicht gewagt ist, verdient es nicht, überhaupt eine Idee genannt zu werden)

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News 26.11.2018

Redispersible Gold Nanoparticle/Polymer Composite Powders Ready for Ligand Exchange Reactions

J. Kronawitt, Z. Fan, M. Schöttle, S. Agarwal, A. Greiner

ChemNanoMat. 2018 doi:10.1002/cnma.201800517

TOC_AuNP_Julia

Dry powders embedded with gold nanoparticles (AuNPs) are produced by spray-drying technique from an aqueous AuNP dispersion in a poly(vinyl alcohol) (PVA) or poly(vinyl pyrrolidone) (PVP) matrix. The prepared powders consist of AuNPs stabilized in hollow capsules of PVA (PVA@AuNP) or PVP (PVP@AuNP) with an average diameter of several micrometers. The AuNP powders are dispersible in water and no agglomeration triggered by the spray drying process of AuNPs is observed. The PVA@AuNP powders are coextruded with polycaprolactone to demonstrate the industrial application of dry‐state AuNPs. With PVP@AuNP the incorporation of AuNP into other stabilizing polymers via ligand exchange method is facilitated. After each step, the active surface of the AuNPs was tested by catalytic studies.

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