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    • 1. 发明申请
    • METHOD OF PREPARING A BIDIRECTIONAL SHAPE-MEMORY ACTUATOR AND METHOD OF ITS USE
    • 双向存储器执行器的制作方法及其使用方法
    • WO2014206812A1
    • 2014-12-31
    • PCT/EP2014/062697
    • 2014-06-17
    • HELMHOLTZ-ZENTRUM GEESTHACHT ZENTRUM FÜR MATERIAL- UND KÜSTENFORSCHUNG
    • LENDLEIN, AndreasBEHL, MarcKRATZ, KarlCHAGANTI, Srinivasa ReddyNÖCHEL, UlrichSAUTER, Tilman
    • B29C61/00B29C61/06
    • B29C61/04B29C61/003B29C61/006B29C61/06B29K2105/16B29K2995/0005B29K2995/0008B29K2995/0018B29L2007/008
    • The present invention is directed to a method of preparing an actuator capable of being repeatedly and reversibly shifted between two freestanding shapes (A, B) under stress-free conditions upon varying a temperature between a temperature T low and a temperature T sep . The method comprising the steps: (a) providing an actuator consisting of or comprising a covalently or physically cross-linked polymer network, the polymer comprising a first phase having a thermodynamic phase transition extending in a temperature range from T trans,onset to T trans,offset, and an elastic phase having a glass transition temperature T g , with T g trans,onset, the polymer having an initial shape; (b) deforming the polymer to a deformation shape at a temperature T prog by applying a stress, where the deformation is adapted to align chain segments of the polymer; (c) setting the polymer to a temperature T low with T low trans,onset under maintaining the stress as to provide a solidified state of the polymer domains associated with the first phase; (d) heating the polymer to a predetermined separation temperature T sep , with T trans,onset sep trans,offset, under stress-free conditions as to melt first polymeric domains (AD) of the first phase having a transition temperature in the range between T trans,onset and T sep and to maintain second domains (SD) of the first phase having a transition temperature in the range between T sep and Τ trans,offset in the solidified state, thus implementing shape A, where shape A geometrically lies between the initial shape provided in step (a) and the deformation shape applied in step (b).
    • 本发明涉及一种制备致动器的方法,该致动器能够在温度Tlow和温度Tsep之间的温度变化时在无应力条件下在两个独立形状(A,B)之间重复地和可逆地移动。 该方法包括以下步骤:(a)提供由共价或物理交联的聚合物网络组成或包含共价或物理交联的聚合物网络的致动器,所述聚合物包括第一相,其具有在Ttrans,起始至Ttrans的温度范围内延伸的热力学相变, ,具有Tg