Dynamic behavior of magnetic hybrid films of polyvinyl butyral/iron oxide nanoparticles (PVB/Fe2O3) for their control as microactuators

Llamas-Hernandez, Mayra; López-Walle, Beatriz; Rakotondrabe, Micky; Melo, Martín Édgar Reyes

doi:10.1016/j.physb.2017.10.095

Cited by 4 publications

(4 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where τ is the relaxation time of the elementary or noncooperative motions of cooperative movements, and it is defined by eq. (7). For T ≥ T * , the Z parameter is equal to 1, and when T decreases to T o the magnitude of Z increases, in consequence τ cooperative tends to an infinity value.…”

Section: Reviewmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

“…Magnetic polymer hybrid films (MPHFs), composed of iron oxide nanoparticles (IONPs) and polymer matrices, are of great interest to carry out functions as actuators or sensors in electronic or mechatronic devices. [1][2][3][4][5][6][7] However, structural relaxations of the polymeric matrix must be studied to optimize the potential applications of these MPHFs. Several thermoplastic polymers can be used as the matrix, and polystyrene (PS) is one of the most important thermoplastic polymers in several areas of industry.…”

Section: Introductionmentioning

confidence: 99%

“…The addition of IONPs into a PS matrix produces a synergy among them, such that the obtained MPHF responds to an external magnetic field with fast reaction and contactless control. 1,2,7 Additional applications could also be obtained for MPHFs considering that the magnetic properties of IONPs are very important due to their potential integration into a broad range of technological applications, extending from magnetic fluids, 12,13 catalysis, 14 ultrahigh-density magnetic storage media, 15 biotechnology and biomedicine, 13 and magnetic resonance imaging. 16 IONPs could have a single magnetic domain structure, consisting of spins groups all pointing in the same direction and acting cooperatively.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The effect of iron oxide nanoparticles on the mechanical relaxation of magnetic polymer hybrid films composed of a polystyrene matrix, a fractional calculus approach

Rentería-Baltiérrez

Melo

López-Walle

et al. 2019

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

A magnetic polymer hybrid film (MPHF) with a thickness of ~80 μm, composed of iron oxide nanoparticles (IONPs) in a polystyrene (PS) matrix, was successfully prepared. Its structure and morphology were analyzed by HRTEM, XRD, and FTIR. The optical and magnetic behaviors were studied by UV–Vis spectroscopy and VSM, respectively. The main relaxation of the MPHF was characterized by dynamic mechanical analysis (DMA), and the molecular mobility was analyzed by a fractional Zener model (FZM). Results obtained by DMA reveal the mechanical manifestation of the α‐relaxation for both, PS and MPHF, and how this process is modified by IONPs into MPHFs. Good agreement between experimental DMA spectra and the theoretical results calculated from the FZM was obtained. Fractional parameters a and b characterize the molecular mobility at low and high temperatures, respectively. These results show that at low temperatures ( a parameter), molecular mobility is slightly affected by the presence of IONPs, while at high temperatures ( b parameter), molecular mobility is affected in a greater degree. IONPs decrease the molecular mobility of PS matrix; this effect is more pronounced at temperatures above the glass transition temperature. These results validate the effect of IONPs on PS matrix considering future applications of the MPHFs. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47840.

show abstract

Section: Reviewmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%