Related Experiment Video
Updated: Apr 1, 2026
09:45
Photodynamic Therapy with Blended Conducting Polymer/Fullerene Nanoparticle Photosensitizers
Published on: October 28, 2015
9.0K
Attenuating microwave radiation by absorption through controlled nanoparticle localization in PC/PVDF blends
Sourav Biswas1, Goutam Prasanna Kar, Suryasarathi Bose
1Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India. sbose@materials.iisc.ernet.in.
Physical Chemistry Chemical Physics : PCCP
|October 3, 2015
Summary
Tailoring nanoparticle arrangement in polymer blends significantly enhances microwave absorption. This research demonstrates lightweight microwave absorbers with up to 90% absorption by strategically positioning conductive, magnetic, and dielectric components.
Area of Science:
- Materials Science
- Polymer Science
- Nanotechnology
Background:
- Nanoscale ordering in polymer blends is crucial for developing materials with specific properties.
- Controlling nanoparticle arrangement in polymer blends can lead to advanced functional materials.
Purpose of the Study:
- To investigate the impact of nanoparticle arrangement on microwave absorption in polycarbonate/poly(vinylidene fluoride) blends.
- To achieve high microwave absorption efficiency through controlled localization of different nanoparticles.
Main Methods:
- Fabrication of co-continuous polycarbonate/poly(vinylidene fluoride) blends.
- Incorporation and strategic localization of multiwall carbon nanotubes (MWNTs), Fe3O4, and barium titanate (BT) nanoparticles.
- Modification of MWNTs with polyaniline and surface treatment of BT nanoparticles to control localization.
Main Results:
- Achieved outstanding microwave absorption of approximately 90% with a reflection loss of -71 dB in a model blend.
- Demonstrated that localized conductive (polyaniline-modified MWNTs) and magnetic (Fe3O4) inclusions in PVDF, along with dielectric inclusions (BT) in PC, enhance absorption.
- Obtained a shielding effectiveness of -37 dB, primarily through absorption, by optimizing nanoparticle distribution.
Conclusions:
- The ordered arrangement of nanoparticles in polymer blends is a powerful tool for designing efficient microwave absorbers.
- Strategic localization of conductive, magnetic, and dielectric nanoparticles enables tailored microwave absorption properties.
- Lightweight and high-performance microwave absorbers can be developed using polymer blend systems.
