Golden glittering
biocomposite fibers from poly(lactic acid) (PLA)
and nanosilver-coated titanium dioxide (Ag/TiO
2
) were successfully
prepared
via
a melt spinning process. Various contents
of 10% Ag/TiO
2
/PLA masterbatch were diluted with PLA in
concentrations of 5, 10, 15, 20, 25, and 30 phr, respectively. The
physical, mechanical, thermal, and antibacterial properties of the
obtained fibers were investigated. The results indicated that the
glittering biocomposite fiber had a light, yellow-gold color and a
slightly rough surface. Tenacity and elongation at break of the glittering
biocomposite fibers were lower than those of the pristine PLA fiber.
The thermal properties of the glittering composite fibers also decreased
with increasing masterbatch content. The PLA/PEG-10 biocomposite fiber
with good spinnability and mechanical properties was suitably used
for preparing the golden glittering composite fabric by the knitting
process. Moreover, the golden glittering biocomposite fabrics exhibited
antibacterial activity against certain microbes, for example,
Staphylococcus aureus
,
Bacillus subtilis,
and
Candida albicans
. The prepared
fabric has significant potential for use in eco-friendly textile products
and antibacterial fabrics. Besides, our novel textiles showed not
only the photocatalytic property needed to degrade organic dyes such
as methylene blue in water but also the ion-sensing property for mercury(II)
ions by changing the textile color from yellow to colorless.
Magnesium silicate hydrate was synthesized for using as an adsorbent for different commercial organic dyes. X-ray diffraction (XRD) confirmed the crystalline phase of magnesium silicate hydrate. Some characteristic absorption bands of the magnesium silicate hydrate structure were observed in the Fourier transform infrared spectroscopy (FTIR) spectrum which supported the result identified from XRD data. Analysis of surface area and porosity by surface area analyzer showed that the synthesized magnesium silicate had high surface area of 634.63 m2/g and also showed the average BJH pore size of 3.72 nm. Insight into the sorption isotherm curve, the hysteresis characteristic was clearly observed suggesting a presence of mesopores within the obtained material. Dye adsorption study revealed that the synthesized adsorbent had the strongest affinity to the cationic dye (methylene blue) on account of the negative charge on the surface of the adsorbent. Hence, the adsorption of methylene blue was reached the equilibrium at the fastest time. In all, the results showed a possibility to apply this prepared magnesium silicate materials as a selective adsorbent for cationic dyes.
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