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  9. Surface Properties Of Condensed Matter
  11. Increasing Cathode Potential Of Homogeneous Low Voltage Electron Beam Irradiation (hlebi) To Increase Impact Strength Of Carbon Fiber Reinforced Polycarbonate And Characterization By Xps C1s And O1s Peaks.
  1. Home
  3. Research Domains
  5. Physical Sciences
  7. Condensed Matter Physics
  9. Surface Properties Of Condensed Matter
  11. Increasing Cathode Potential Of Homogeneous Low Voltage Electron Beam Irradiation (hlebi) To Increase Impact Strength Of Carbon Fiber Reinforced Polycarbonate And Characterization By Xps C1s And O1s Peaks.

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Increasing Cathode Potential of Homogeneous Low Voltage Electron Beam Irradiation (HLEBI) to Increase Impact Strength of Carbon Fiber Reinforced Polycarbonate and Characterization by XPS C1s and O1s Peaks.

Fumiya Sato1, Kouhei Sagawa1, Helmut Takahiro Uchida1,2

  • 1Graduate School of Engineering, Tokai University, 4-1, Kitakaname, Hiratsuka 259-1292, Japan.

Materials (Basel, Switzerland)
|December 11, 2025

View abstract on PubMed

Summary
This summary is machine-generated.
Keywords:
X-ray Photoelectron Microscopy (XPS)carbon fibercathode potentialelectron beam irradiation

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Homogeneous low voltage electron beam irradiation (HLEBI) significantly enhances carbon fiber reinforced polycarbonate (CFRPC) impact strength by optimizing electron beam penetration depth. This surface treatment improves interfacial adhesion between carbon fibers and polycarbonate, leading to superior material performance.

Area of Science:

  • Materials Science
  • Polymer Composites
  • Surface Engineering

Background:

  • Carbon fiber reinforced polycarbonate (CFRPC) composites offer a balance of strength and toughness.
  • Improving the interfacial adhesion between carbon fibers (CF) and polycarbonate (PC) is crucial for enhancing composite performance.
  • Electron beam irradiation is a potential method for surface modification of polymer composites.

Purpose of the Study:

  • To investigate the effect of homogeneous low voltage electron beam irradiation (HLEBI) on the Charpy impact strength of [PC]10[CF]9 composites.
  • To determine the optimal HLEBI parameters for maximizing impact strength and understanding the underlying mechanisms.
  • To analyze the changes in interfacial adhesion and surface chemistry induced by HLEBI.

Main Methods:

impact strength
penetration depth
polycarbonate
thermoplastics
  • Samples of [PC]10[CF]9 composite were subjected to HLEBI at various cathode potentials (Vc) and a dose of 43.2 kGy.
  • Charpy impact strength (auc) was measured at a median fracture probability (Pf) of 0.50.
  • Scanning electron microscopy (SEM) was used to examine fracture surfaces, and X-ray photoelectron spectroscopy (XPS) analyzed the CF surface chemistry.

Main Results:

  • HLEBI at 200 kV resulted in a 47% increase in Charpy impact strength (from 118 to 173 kJm-2).
  • Increasing Vc settings (150, 175, 200 kV) progressively enhanced impact strength, attributed to increased HLEBI penetration depth.
  • SEM revealed improved CF/PC adhesion with increasing Vc, while XPS showed increased sp3 hybridization and carbonate/ester group formation on CF surfaces at 200 kV.

Conclusions:

  • HLEBI is an effective method for enhancing the impact toughness of CFRPC composites.
  • The optimal HLEBI parameters (e.g., 200 kV) promote better interfacial adhesion through increased CF surface functionalization.
  • The study demonstrates a clear correlation between HLEBI parameters, interfacial properties, and the mechanical performance of CFRPC.