Shape memory behaviour of PMMA-coated NiTi alloy under thermal cycle

0561755 - FZÚ 2023 RIV CH eng J - Článek v odborném periodiku
Samal, Sneha Manjaree - Kosjaková, O. - Vokoun, David - Stachiv, Ivo
Shape memory behaviour of PMMA-coated NiTi alloy under thermal cycle.
Polymers. Roč. 14, č. 14 (2022), č. článku 2932. E-ISSN 2073-4360
Grant CEP: GA ČR(CZ) GC21-12994J; GA ČR(CZ) GC22-14387J; GA MŠMT(CZ) EF16_019/0000760
Grant ostatní: OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institucionální podpora: RVO:68378271
Klíčová slova: curvature * radius * shape recovery * NiTi * PMMA * thermal cycles
Obor OECD: Materials engineering
Impakt faktor: 5, rok: 2022
Způsob publikování: Open access

Both poly(methyl methacrylate) (PMMA) and NiTi possess shape memory and biocompatibility behavior. The macroscale properties of PMMA–NiTi composites depend immensely on the quality of the interaction between two components. NiTi shape memory alloy (SMA) and superelastic (SE) sheets were spin coated on one side with PMMA. The composite was prepared by the spin coating method with an alloy-to-polymer-thickness ratio of 1:3. The bending stiffness and radius of curvature were calculated by using numerical and experimental methods during thermal cycles. The experimental radius curvatures in actuation have good agreement with the model. The change in shape results from the difference in coefficients of thermal expansion between PMMA and NiTi. Actuation temperatures were between 0 and 100 °C for the SMA–PMMA composite with a change in curvature from 10 to 120 mm with fixed Young’s modulus of PMMA at 3 GPa, and a change in Young’s modulus of NiTi from 30 to 70 GPa. PMMA–NiTi composites are useful as actuators and sensor elements.
Trvalý link: https://hdl.handle.net/11104/0334274