Mechano-Chemical Properties of Electron Beam Irradiated Polyetheretherketone

Almas, Nurlan; Kurbanova, Bayan; Zhakiyev, Nurkhat; Rakhadilov, Baurzhan; Sagdoldina, Zhuldyz; Andybayeva, Gaukhar; Nurzhan, Serik,; Zhanna, Alsar,; Utegulov, Zhandos; Insepov, Z.

doi:10.3390/polym14153067

Cited by 3 publications

(2 citation statements)

References 48 publications

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“…In our previous study, monte CArlo SImulation of electroN trajectory in sOlids (CASINO) software was used to estimate the penetration depth of electrons, and backscattered and transmitted energies in PEEK samples [ 31 ]. The simulation of PEEK samples exposed to 2.7 MeV electrons included the particle collision process, the maximum depth to which the electron trajectories might penetrate the sample, the energy of the transmitted electrons, and the energy of the backscattered electrons.…”

Section: Resultsmentioning

confidence: 99%

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Effects of Electron Beam Irradiation on Mechanical and Tribological Properties of PEEK

et al. 2023

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In this work, the mechanical and tribological characteristics of polyetheretherketone (PEEK) sheets were enhanced by electron beam irradiation. PEEK sheets irradiated at a speed of 0.8 m/min with a total dose of 200 kGy achieved the lowest specific wear rate of 4.57 ± 0,69 (10−6 mm3/N−1m−1), compared to unirradiated PEEK with a rate of 13.1 ± 0.42 (10−6 mm3/N−1m−1). Exposure to an electron beam at 9 m/min for 30 runs, with a dose of 10 kGy per run for a total dose of 300 kGy, resulted in the highest improvement in microhardness, reaching 0.222 GPa. This may be due to the decrease in crystallite size, as indicated by the broadening of the diffraction peaks in the irradiated samples. According to the results of thermogravimetric analysis, the degradation temperature of the irradiated samples remained unchanged at 553 ± 0.5 °C, except a sample irradiated at dose 400 kGy, where the degradation temperature shifted towards a lower position of 544 ± 0.5 °C. Differential scanning calorimetry results revealed that the melting temperature () of the unirradiated PEEK was about 338 ± 0.5 °C, while a high temperature shift of the was observed for the irradiated samples.

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Section: Resultsmentioning

confidence: 99%

“…In our previous work, the roughness analysis of pristine and irradiated PEEK was performed using the AFM technique [ 31 ]. Irregular grooves and bumps resulting from sample polishing were found on the surface of a non-irradiated sample.…”

Section: Resultsmentioning

confidence: 99%

Effects of Electron Beam Irradiation on Mechanical and Tribological Properties of PEEK

et al. 2023

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In-situ, real-time monitoring of thermo-mechanical properties of biological tissues undergoing laser heating and ablation

Kurbanova,

Alisherov,

Ashikbayeva

et al. 2024

Biomed. Opt. Express

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In this work, Brillouin light-scattering spectroscopy and optical backscattering reflectometry (OBR) using Mg–silica-NP-doped distributed sensing fibers were employed for monitoring local GHz visco-elastic properties and surface temperature, respectively, during laser driven heating and ablation of chicken tissues. The spatial temperature distribution measured by OBR at various infrared laser heating powers and times was used to validate spatio-temporal local temperature variations modeled by the finite element method via solving Pennes’ bioheat conduction equation. The reduction of viscosity and stiffness in chicken skin during its laser heating was attributed to water loss, protein denaturation and change in lipid phase behavior. These findings open avenues for the simultaneous real-time hybrid optical sensing of both viscoelasticity and local temperature in biological tissues undergoing denaturation and gelation during thermal ablation in clinical settings.

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Thermo-Visco-Elastometry of RF-Wave-Heated and Ablated Flesh Tissues Containing Au Nanoparticles

et al. 2022

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We report non-contact laser-based Brillouin light-scattering (BLS) spectroscopy measurements of the viscoelastic properties of hyperthermally radiofrequency (RF)-heated and ablated bovine liver and chicken flesh tissues with embedded gold nanoparticles (AuNPs). The spatial lateral profile of the local surface temperature in the flesh samples during their hyperthermia was measured through optical backscattering reflectometry (OBR) using Mg–silica-NP-doped sensing fibers distributed with an RF applicator and correlated with viscoelastic variations in heat-affected and ablated tissues. Substantial changes in the tissue stiffness after heating and ablation were directly related to their heat-induced structural modifications. The main proteins responsible for muscle elasticity were denatured and irreversibly aggregated during the RF ablation. At T > 100 °C, the proteins constituting the flesh further shrank and became disorganized, leading to substantial plastic deformation of biotissues. Their uniform destruction with larger thermal lesions and a more viscoelastic network was attained via AuNP-mediated RF hyperthermal ablation. The results demonstrated here pave the way for simultaneous real-time hybrid optical sensing of viscoelasticity and local temperature in biotissues during their denaturation and gelation during hyperthermia for future applications that involve mechanical- and thermal-property-controlled theranostics.

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Mechano-Chemical Properties of Electron Beam Irradiated Polyetheretherketone

Cited by 3 publications

References 48 publications

Effects of Electron Beam Irradiation on Mechanical and Tribological Properties of PEEK

Effects of Electron Beam Irradiation on Mechanical and Tribological Properties of PEEK

In-situ, real-time monitoring of thermo-mechanical properties of biological tissues undergoing laser heating and ablation

Thermo-Visco-Elastometry of RF-Wave-Heated and Ablated Flesh Tissues Containing Au Nanoparticles

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