2022
DOI: 10.3390/nano12234201
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Valorization of Sugarcane By-Products through Synthesis of Biogenic Amorphous Silica Microspheres for Sustainable Cosmetics

Abstract: Ashes from sugarcane by-product incineration were used to synthesize silica powders through alkaline hot extraction, followed by ethanol/acid precipitation or the sol–gel method. Both production methods allowed amorphous spherical silica microparticles with sizes ranging from 1–15 μm and 97% purity to be obtained. Water absorption ranged from 135–155 mL/100 g and 150–250 mL/100 g for precipitated silica and silica gel, respectively, while oil absorption ranged from 305 to 390 and from 250 to 350 mL/100 g. The … Show more

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Cited by 7 publications
(6 citation statements)
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“…Regarding the particle size, the different formulations yielded microparticles with average sizes ranging from 4.8 to 10.4 μm ( Table 2 ), which are slightly larger values than the average diameters of empty silica microparticles, ca. 3.9 μm [ 21 ].…”
Section: Resultsmentioning
confidence: 99%
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“…Regarding the particle size, the different formulations yielded microparticles with average sizes ranging from 4.8 to 10.4 μm ( Table 2 ), which are slightly larger values than the average diameters of empty silica microparticles, ca. 3.9 μm [ 21 ].…”
Section: Resultsmentioning
confidence: 99%
“…Finally, at 720 cm −1 , the stretching of aliphatic ether compounds and the C=C bending of alkene were disubstituted (cis). The spectra for silica microparticles mainly present a large band between 1240–1040 cm −1 , which represents the asymmetric stretching vibrations of siloxane covalent bonds [ 21 ]. The spectra for retinol-loaded silica microparticles are mainly composed of the 1240–1040 cm −1 band of silica, and some peaks that are also present in retinol, such as 2925–2850 cm −1 and 1740 cm −1 .…”
Section: Resultsmentioning
confidence: 99%
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