Next Article in Journal
Tribological Study of Multi-Walled Carbon Nanotube-Reinforced Aluminum 7075 Using Response Surface Methodology and Multi-Objective Genetic Algorithm
Next Article in Special Issue
Comprehensive Review of Endogenous and Exogenous Parameters Influencing Dynamic Stab Impact Performance in Protective Textiles and Fibrous Composite Materials
Previous Article in Journal
Effect of Yarn-Level Fibre Hybridisation on Thermomechanical Behaviour of 3D Woven Orthogonal Flax/E-Glass Composite Laminae
Previous Article in Special Issue
Thermal Properties of MWCNT-rGO-MgO-Incorporated Alkali-Activated Engineered Composites
 
 
Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
Journals
J. Compos. Sci.
Volume 9
Issue 3
10.3390/jcs9030136
jcs-logo
Submit to this Journal Review for this Journal Propose a Special Issue
► Article Menu

Article Menu

share Share announcement Help format_quote Cite question_answer Discuss in SciProfiles
first_page
settings
Order Article Reprints
Font Type:
Arial Georgia Verdana
Font Size:
Aa Aa Aa
Line Spacing:
Column Width:
Background:
Article

Controlling Terahertz Dielectric Responses in Polymer Composites by Engineering α-Al2O3 Whisker Filler Distribution

by
Gang Huang
1,
Chengzhe Gao
1,
Jin Leng
1,
Yang Wu
1,
Liying Chen
1,
Ran Jing
1,
Pengshu Xie
2,
Hua Deng
2 and
Qiwu Shi
1,*
1
College of Materials Science and Engineering, Sichuan University, Chengdu 610064, China
2
College of Polymer Science and Engineering, Sichuan University, Chengdu 610064, China
*
Author to whom correspondence should be addressed.
J. Compos. Sci. 2025, 9(3), 136; https://doi.org/10.3390/jcs9030136
Submission received: 24 February 2025 / Revised: 9 March 2025 / Accepted: 12 March 2025 / Published: 14 March 2025
(This article belongs to the Special Issue Recent Progress in Hybrid Composites)
Browse Figures
Versions Notes

Abstract

As the communication band gradually approaches the terahertz (THz) range, there is an urgent need to explore materials with ideal dielectric properties for THz communication devices. Nevertheless, most polymers present a low dielectric constant (Dk), and the regulation of their dielectric properties in the THz range has rarely been reported. In this work, the isotactic polypropylene (iPP)/α-Al2O3 whisker composites were synthesized and their THz dielectric parameters were optimized. The Dk values increased from 2.23 to 3.13 with filler (α-Al2O3 whisker) concentration, ranging from 0 to 20 vol%, but were almost independent of the test frequency. The loss tangent (Df) values presented an increasing tendency along with both filler concentrations and test frequency. All composites exhibited Df values of less than 4.0 × 10−3. Particularly, the dielectric properties of composites can be further regulated by adjusting the orientation direction of the whisker fillers. The orientation of the whisker fillers was adjusted via the injection molding method. Along the direction of the whisker orientation distribution, the composites exhibit higher Dk values and lower Df values. This work presented a schematic to design polymer composites with higher Dk but controlled Df in the THz range and is significant for the development of advanced materials-based THz devices.
Keywords: terahertz; polymer composites; α-Al2O3 whisker; dielectric constant; loss tangent terahertz; polymer composites; α-Al2O3 whisker; dielectric constant; loss tangent

Share and Cite

MDPI and ACS Style

Huang, G.; Gao, C.; Leng, J.; Wu, Y.; Chen, L.; Jing, R.; Xie, P.; Deng, H.; Shi, Q. Controlling Terahertz Dielectric Responses in Polymer Composites by Engineering α-Al2O3 Whisker Filler Distribution. J. Compos. Sci. 2025, 9, 136. https://doi.org/10.3390/jcs9030136

AMA Style

Huang G, Gao C, Leng J, Wu Y, Chen L, Jing R, Xie P, Deng H, Shi Q. Controlling Terahertz Dielectric Responses in Polymer Composites by Engineering α-Al2O3 Whisker Filler Distribution. Journal of Composites Science. 2025; 9(3):136. https://doi.org/10.3390/jcs9030136

Chicago/Turabian Style

Huang, Gang, Chengzhe Gao, Jin Leng, Yang Wu, Liying Chen, Ran Jing, Pengshu Xie, Hua Deng, and Qiwu Shi. 2025. "Controlling Terahertz Dielectric Responses in Polymer Composites by Engineering α-Al2O3 Whisker Filler Distribution" Journal of Composites Science 9, no. 3: 136. https://doi.org/10.3390/jcs9030136

APA Style

Huang, G., Gao, C., Leng, J., Wu, Y., Chen, L., Jing, R., Xie, P., Deng, H., & Shi, Q. (2025). Controlling Terahertz Dielectric Responses in Polymer Composites by Engineering α-Al2O3 Whisker Filler Distribution. Journal of Composites Science, 9(3), 136. https://doi.org/10.3390/jcs9030136

Article Metrics

Back to TopTop