Related Experiment Video
Updated: May 9, 2025
06:30
Fabrication of Ultra-thin Color Films with Highly Absorbing Media Using Oblique Angle Deposition
Published on: August 29, 2017
8.2K
Optical Property Evolution of Ultrathin Porous Polymer Films after Introducing Carbon Black
Yiran Gu1, Peng Zhu1, Huapeng Zhang1
1College of Textile Science and Engineering (International Institute of Silk), Zhejiang Sci-Tech University, Hangzhou, Zhejiang, 310018, China.
Macromolecular Rapid Communications
|April 30, 2025
Summary
Ultrathin porous polymer films retain whiteness even with carbon black. Introducing carbon black surprisingly enhanced reflectance in some cases, challenging initial expectations.
Area of Science:
- Materials Science
- Optics
- Polymer Chemistry
Background:
- Ultrathin porous polymer films are gaining attention for their brilliant whiteness.
- The optical property evolution of white porous polymer films upon incorporating light-absorbing carbon materials is not well understood.
Purpose of the Study:
- To investigate the optical properties of ultrathin porous polymer films containing carbon black.
- To explore the structure-property relationships influencing reflectance and transmittance.
- To determine the effect of carbon black content on film color and optical performance.
Main Methods:
- Preparation of ultrathin porous polymer films with varying carbon black content using spin coating.
- Analysis of structure-activity relationships.
- Finite-difference time-domain (FDTD) simulations to study the effects of pore size, porosity, film thickness, and carbon black content.
Main Results:
- Porous structures significantly increase film reflectance and decrease transmittance.
- Low carbon black content had minimal impact on reflectance, while high content negatively affected it.
- Reflectance was negatively correlated with transmittance.
- Porous polystyrene/carbon black films with 0.001g carbon black showed higher reflectance than pure porous films, attributed to structural reinforcement.
Conclusions:
- Ultrathin porous polymer films can maintain whiteness even with the addition of carbon black.
- Carbon black's effect on optical properties is dependent on its concentration and the film's porous structure.
- Experimental results revealed unexpected optical enhancements due to carbon black reinforcing the porous structure, a phenomenon not predicted by simulations.
