Magnetically tunable rheological properties of PVDF doped with superparamagnetic Fe3O4 nanoparticles synthesized by rapid microwave method

被引：8

作者：

Manori, Samta ^{[1
]}

Singh, Prayas ^{[1
]}

Yadav, Priya ^{[1
]}

Kumar, Ashwani ^{[2
]}

Chandra, Ramesh ^{[2
]}

Raina, K. K. ^{[3
]}

Shukla, Ravi Kumar ^{[1
]}

机构：

[1] DIT Univ, Sch Phys Sci, Dept Phys, Adv Funct Smart Mat Lab, Dehra Dun 248009, Uttarakhand, India

[2] Indian Inst Technol Roorkee, Inst Instrumentat Ctr, Nanosci Lab, Roorkee 247667, Uttarakhand, India

[3] MS Ramaiah Univ Appl Sci, Bangalore, Karnataka, India

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2023年 / 174卷

基金：

英国工程与自然科学研究理事会;

关键词：

Rapid microwave synthesis; Superparamagnetic; Rheology; Magnetic ageing; Flexible magnetic films; Memory storage; IRON-OXIDE NANOPARTICLES; SHEAR THICKENING FLUIDS; POLYVINYLIDENE FLUORIDE; SUSPENSIONS; DESIGN;

D O I：

10.1016/j.jpcs.2022.111137

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report on the surfactant/additives free synthesis of single domain superparamagnetic Fe3O4 nanoparticles (FNPs) by rapid microwave synthesis method. X-Ray diffraction (XRD) and Scanning Electron Microscopy (SEM) studies reveal that FNPs were crystallized in the magnetite (Fe3O4) lattice and have granular shape with average particles size of similar to 14 nm. The band gap of FNPs calculated from UV-Visible absorption spectrum is similar to 2.3 eV. FNPs exhibit single domain superparamagnetic behaviour as confirmed from magnetic hysteresis loops. The nanocomposites of FNPs and beta-phase of PVDF were prepared via mixed solvent approach using THF/DMF with different concentrations of FNPs. The rheological behaviour of the nanocomposites was studied with and without ageing in an applied magnetic field of 3500 Gauss for 3 h. Samples depicts shear thinning to shear thickening transition, decrease in zero shear viscosity and long frequency range viscoelastic behaviour as function of increasing FNP concentration. Increase in CST region, fluidity and complex modulus are the main consequences of magnetic aging. FNP-PVDF nanocomposites with such properties could find applications in flexible magnetic and mechanical films for soft body armor and memory storage.

引用

页数：10

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