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Structural, optical, and electrical properties of cellulose/titanate nanosheets composite with enhanced protection against gamma irradiation.
- Source :
-
Ceramics International . Oct2023, Vol. 49 Issue 19, p31862-31870. 9p. - Publication Year :
- 2023
-
Abstract
- Two-dimensional (2D) materials have emerged as a promising functional filler in nanocomposites due to their unique anisotropy and resilience to harsh conditions. We report herein the use of Ti 0.91 O 2 nanosheets as a protective component against γ -irradiation to cellulose paper. The titanate nanosheets were prepared via a sequence of solid-state synthesis of lepidocrocite-type Cs 0.7 Ti 1.825 O 4 , proton exchange to H 0.7 Ti 1.825 O 4 ·H 2 O, and exfoliation with tetrabutylammonium hydroxide. The nanosheets were incorporated into the commercial cellulose filter paper by a simple dip coating up to 0.6 mg cm−2, equivalent to 10 wt% TiO 2. The nanosheets distribution was demonstrated by energy dispersive X-ray (EDX) mapping, synchrotron radiation X-ray tomographic microscopy (SRXTM), and atomic force microscopy (AFM). It is found that γ -irradiation (up to 50 kGy) destroyed the cellulose I β crystallinity of uncoated paper, but this is less pronounced in the cellulose/titanate nanosheets composite. This was also confirmed by the lack of a 235 nm-absorption characteristics of irradiation-induced decomposition product(s) in nanosheets-containing papers, which also exhibit UVA shielding property. The coated samples remained white while the uncoated ones were darkened with γ -irradiation. In addition, the nanosheets-coated papers showed dielectric permittivity, loss tangent, and AC conductivity which were invariant of the γ -dose, unlike those from the uncoated ones. Our work demonstrates the use of lead-free Ti 0.91 O 2 nanosheets as a γ -shielding component to slow down/prevent structural, optical, and electrical properties damages in cellulose paper, which could extend to other nature-derived materials. [Display omitted] • Simple dip coating of commercial filter paper into titanate nanosheets suspension. • Nanosheets loadings were confirmed by several techniques. • The nanosheets (0.6 mg cm−2, or 10 wt% TiO 2) prevent structural, optical, and electrical properties damages by γ -irradiation (up to 50 kGy). [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 49
- Issue :
- 19
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 169876027
- Full Text :
- https://doi.org/10.1016/j.ceramint.2023.07.147