期刊
JOURNAL OF MACROMOLECULAR SCIENCE PART B-PHYSICS
卷 61, 期 10-11, 页码 1261-1269出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/00222348.2022.2159697
关键词
Composite; dielectric properties; gamma radiation; LDPE; ZIF-8
资金
- Ministry of Education, Science and Technological Development of the Republic of Serbia
- Ministry of Scientific and Technological Development, Higher Education and Information Society of the Republic of Srpska
- National Research Foundation, South Africa
This article investigates the changing dielectric properties of a LDPE/ZIF-8 composite under gamma radiation. The study found that the conductivity of the samples increased linearly with increasing radiation dose, while the change in dielectric permittivity showed nonlinear behavior.
Metal-organic frameworks (MOFs) are a class of materials that are increasingly used for the detection and separation of gases. This article presents the influence of gamma radiation on the dielectric properties of a LDPE/ZIF-8 composite that can be used for the production of gas sensors and massive gas absorbers. A low-density polyethylene (LDPE)-microsized zeolitic imidazolate framework-8 (ZIF-8) composite, obtained by melt mixing (95/5 weight ratio), was gamma-irradiated at room temperature to different absorbed doses up to 300 kGy. Infrared spectroscopy and optical microscopy confirmed the degradation of the ZIF-8 due to the gamma irradiation. The AC conductivity (admittance) of the samples was studied in the frequency range of 24 Hz - 120 kHz and a temperature range 200-350 K. The composite showed larger admittance components relative to the admittance components of pure LDPE; the conductance of the samples increased almost linearly with increasing irradiation dose. On the other hand, the change in dielectric permittivity of the LDPE and the composite due to irradiation was weak and showed nonlinear behavior with increasing radiation dose.
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