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Thermoresponsive surface functionalization of FeRh alloy through PNIPAM grafting

, 
Maxim D. Popov 1
Maxim D. Popov
, 
Timur R. Nizamov 1
Timur R. Nizamov
, 
Elizaveta S. Permyakova 1
Elizaveta S. Permyakova
, 
Tatiana S. Ilina 1
Tatiana S. Ilina
,  , 
Olga A. Guselnikova 2
Olga A. Guselnikova
,  , 
1 National University of Science and Technology “MISIS”, 4-1 Leninsky Ave., Moscow 119049, Russian Federation
2 Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, 43A Lenin Ave., Tomsk 634050, Russian Federation
10.3897/j.moem.11.2.142503
Published 30 June 2025
Communication , Volume 11, Issue 2, 93-98
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Amirov A. A. et al. Thermoresponsive surface functionalization of FeRh alloy through PNIPAM grafting // Modern Electronic Materials. 2025. Vol. 11. No. 2. pp. 93-98.
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Amirov A. A., Popov M. D., Nizamov T. R., Permyakova E. S., Ilina T. S., Turutin A. V., Guselnikova O. A., Kiselev D. A., Parkhomenko Y. N. Thermoresponsive surface functionalization of FeRh alloy through PNIPAM grafting // Modern Electronic Materials. 2025. Vol. 11. No. 2. pp. 93-98.
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TY - JOUR
DO - 10.3897/j.moem.11.2.142503
UR - https://moem.colab.ws/publications/10.3897/j.moem.11.2.142503
TI - Thermoresponsive surface functionalization of FeRh alloy through PNIPAM grafting
T2 - Modern Electronic Materials
AU - Amirov, Abdulkarim A.
AU - Popov, Maxim D.
AU - Nizamov, Timur R.
AU - Permyakova, Elizaveta S.
AU - Ilina, Tatiana S.
AU - Turutin, Andrei V.
AU - Guselnikova, Olga A.
AU - Kiselev, Dmitry A.
AU - Parkhomenko, Yuri N.
PY - 2025
DA - 2025/06/30
PB - НИТУ МИСИС
SP - 93-98
IS - 2
VL - 11
ER -
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@article{2025_Amirov,
author = {Abdulkarim A. Amirov and Maxim D. Popov and Timur R. Nizamov and Elizaveta S. Permyakova and Tatiana S. Ilina and Andrei V. Turutin and Olga A. Guselnikova and Dmitry A. Kiselev and Yuri N. Parkhomenko},
title = {Thermoresponsive surface functionalization of FeRh alloy through PNIPAM grafting},
journal = {Modern Electronic Materials},
year = {2025},
volume = {11},
publisher = {НИТУ МИСИС},
month = {Jun},
url = {https://moem.colab.ws/publications/10.3897/j.moem.11.2.142503},
number = {2},
pages = {93--98},
doi = {10.3897/j.moem.11.2.142503}
}
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Amirov, Abdulkarim A., et al. “Thermoresponsive surface functionalization of FeRh alloy through PNIPAM grafting.” Modern Electronic Materials, vol. 11, no. 2, Jun. 2025, pp. 93-98. https://moem.colab.ws/publications/10.3897/j.moem.11.2.142503.
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Keywords

FeRh
FeRh alloys
functional magnetic materials
magnetocaloric effect
PNIPAM
polymer coating
smart composites
surface modification
thermoresponsive polymers

Abstract

The smart thermoresponsive composite of PNIPAM/FeRh by chemical grafting of PNIPAM polymer on substrate of FeRh alloy were fabricated and studied. The characteristic peaks at 1690 (C=O), 2480–3000 (CH), and 3280 (N–H) observed on IR-FTIR spectra of PNIPAM/FeRh corresponded to the functional groups of PNIPAM and confirmed grafting of the polymer on the surface of FeRh substrate. The measurements of wetting demonstrated the changes of contact wetting angle from 69.3±1.5° at 27 °C to 76.9±1.2° at 40 °C attributed with transformation of PNIPAM polymer from the hydrated to the dehydrated state due phase transition with lower critical temperature at ~32 °C. The changes in surface topography of PNIPAM polymer in results of phase transition with lower critical solution temperature in PNIPAM were observed using atomic force microscopy measurements in temperature range 30–50 °C in heating and cooling.

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