Gamma irradiation effect on properties of modified graphene doped PVA nanocomposite films

被引：0

作者：

Lima, Thaises ^{[1
]}

Diniz, Filipe ^{[1
]}

Araujo, Elmo ^{[1
]}

Araujo, Patricia ^{[2
]}

机构：

[1] Univ Fed Pernambuco UFPE, Dept Energia Nucl, Lab Polimeros & Nanoestruturas, Recife, PE, Brazil

[2] Univ Fed Pernambuco UFPE, Dept Engn Biomed, Recife, PE, Brazil

来源：

POLIMEROS-CIENCIA E TECNOLOGIA | 2024年 / 34卷 / 04期

关键词：

electrical conductivity; gamma radiation; optical band gap; polymer composites; thermal analysis; OPTICAL-PARAMETERS; COMPOSITE FILMS;

D O I：

10.1590/0104-1428.20230106

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Gamma radiation effects on extrinsically electrical semiconducting polymer nanocomposite films of poly(vinyl alcohol) (PVA) and 0.5 wt% histidine-modified reduced graphene oxide (H-RGO) filler were evaluated. Thermogravimetric analysis showed thermal degradation stages of the films and UV-Vis analysis allowed the study of optical parameters. Optical band gap energy (Eg) of PVA was shifted from 6.20 to 3.76 eV with the addition of H-RGO filler into the polymer matrix, while the electrical conductivity changed from 10-11 (isolator) to 10-6 (semiconductor) S/cm and PVA/H-RGO nanocomposite reached 10-4 S/cm at 25 kGy gamma-radiation dose. PVA/H-RGO nanocomposite films are promising in a wide range of potential applications, such as bio and chemical sensors, catalysis, and active layers for optoelectronic devices.

引用

页数：10

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