Shape-memory Polymers and Actuators

The classical shape-memory effect in polymers is of high technological significance in applications like heat-shrinkable films and tubes, but has been limited by its one way character. Recently, shape-memory polymer actuators (SMPA) could be realized, which can reversibly change their shape controlled by temperature [1, 2]. A special feature of these semi-crystalline polymer networks is the reprogammability of their shape changing geometry. While the reversible actuation can occur many times upon heating and cooling within a suitable temperature interval, the material´s memory can be erased by heating to a temperature, at which the polymer is completely amorphous. The material is then reprogrammable, whereby the new shape changing geometry can be different. In this lecture the fundamental principles of shape-memory polymers and actuators are presented and new functions like self-healing capability [3] and non-continuously responding SMPAs will be introduced [4].

[1]  M. Behl, K. Kratz, J. Zotzmann, U. Nöchel, A. Lendlein, Adv Mater 25, 2013, 4466-4469.

[2]  M. Behl, K. Kratz, U. Nöchel, T. Sauter, A. Lendlein, P Natl Acad Sci USA 110, 2013,

      12555-12559.

[3]  M. Farhan, T. Rudolph, U. Nöchel, K. Kratz, A. Lendlein, Polymers 10, 2018, 255

[4]  M. Farhan, T. Rudolph, U. Nöchel, W. Yan, K. Kratz, A. Lendlein, ACS Appl Mater & Interf 9, 2017, 33559–33564

 

Martes, Mayo 8, 2018 - 12:30
Andreas Lendlein
Institute of Biomaterial Science, Helmholtz-Zentrum Geesthacht, Teltow, Germany and Institute of Chemistry, University of Potsdam, Potsdam, Germany
Sala de Seminarios (Antigua Biblioteca)
Seminario