Transparent UV-absorbers thin films of zinc oxide: Ceria system synthesized via sol–gel process

Lima, José Fernando de; Martins, Renata Figueredo; Serra, Osvaldo Antônio

doi:10.1016/j.optmat.2012.06.016

Cited by 38 publications

(9 citation statements)

References 22 publications

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“…Sun blocker creams in the market frequently contain minerals like zinc oxide (ZnO 2 ) and titanium dioxide (TiO 2 ) or a wide range of organic chemicals to block UV radiation [24]. Due to the adverse effects of synthetic UV blockers on skin tissue, using a natural blocker has seen increasing attention recently [8].…”

Section: Introductionmentioning

confidence: 99%

Lignin as a UV Light Blocker—A Review

Sadeghifar¹,

2020

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Lignin is the by-product of pulp and paper industries and bio-refining operations. It is available as the leading natural phenolic biopolymer in the market. It has chromophore functional groups and can absorb a broad spectrum of UV light in range of 250–400 nm. Using lignin as a natural ingredient in sunscreen cream, transparent film, paints, varnishes and microorganism protection has been actively investigated. Both in non-modified and modified forms, lignin provides enhancing UV protection of commercial products with less than a 10% blend with other material. In mixtures with other synthetic UV blockers, lignin indicated synergic effects and increased final UV blocking potential in compare with using only synthetic UV blocker or lignin. However, using lignin as a UV blocker is also challenging due to its complex structure, polydispersity in molecular weight, brownish color and some impurities that require more research in order to make it an ideal bio-based UV blocker.

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Section: Introductionmentioning

confidence: 99%

Lignin as a UV Light Blocker—A Review

Sadeghifar¹,

2020

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“…In the last few years, several methods were investigated to restrict the damage caused by UV irradiation, namely the use of additives such as silsesquioxanes [14] and inorganic [15] or organic copolymers [16]. To protect the PDMS films, some researchers have also envisaged the deposition of ZnO or ZnO-doped quantum dots in the form of multilayers to obtain a UV-blocking material [17,18]. Another drawback of PDMS results from the insufficient thermal stability of the polymer when used as thermal control coating [19].…”

Section: Introductionmentioning

confidence: 99%

Polydimethylsiloxane/Additive Systems for Thermal and Ultraviolet Stability in Geostationary Environment

Planes¹,

Coz²,

Soum³

et al. 2016

Journal of Spacecraft and Rockets

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The development of radiation resistant materials is an ongoing challenge for space industry. High-energy irradiation (ultraviolet, electrons, neutrons, protons) induce damage to materials and electronic components in spaceships. Silicone resins are often used and play a key role as coatings and adhesive materials for satellites. Polydimethylsiloxanes show material exhaustion after long-term exposure to ultraviolet irradiation. Consequently, solutions are required to increase their thermo-and photostability under solar irradiation. Three different families of additives, namely ultraviolet absorbers, hindered amine light stabilizers, and a carbazole derivative are investigated. Those ultraviolet stabilizers were mixed with polydimethylsiloxane, then a cross-linking process was run by hydrosilylation. When ultraviolet absorbers could not be used due to a miscibility problem, addition of 0.5 wt % of bis (2,2,6,6-tetramethylpiperidin-4-yl)decanedioate (hindered amine light stabilizer 1) was shown to increase the thermal stability, measured by thermogravimetric analysis, from 360 to 395°C (Td 5%). Using visible near-infrared spectroscopy and after 450 equivalent solar hours of ultraviolet irradiation, an average increase of 2.6% in the ultraviolet stability was also obtained in the wavelength range from 250 to 400 nm. A polydimethylsiloxane/ dibromocarbazole 1.0 wt% did not improve the ultraviolet stability but exhibited a strong increase (about 100°C) of the degradation temperature of the polydimethylsiloxane.

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“…As compared to SNP@PMMA film, SNP@PVA film showed higher percent transmittance (% ) and lower absorbance (Abs) owing to its transparent and partially crystalline nature. Fall in the crystallinity of materials increases their band gap thus, decreasing the absorbance [21]. Thus, these films and the materials made out of them will act as ultraviolet filters to circumvent the degradation of photosensitive formulations and food spoilage or even as sun screen agents.…”

Section: Resultsmentioning

confidence: 99%

Versatile SiO₂ Nanoparticles@Polymer Composites with Pragmatic Properties

Dhapte

Kadam

Pokharkar

et al. 2014

ISRN Inorganic Chemistry

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In the present work, we report the fabrication of silica nanoparticles embedded polymeric (SiO 2 nanoparticles@polymer) composite films for numerous traits like texture, folding endurance, crystallinity, size, thermal behavior, spectral analysis, and bioactivity. Significant facets of bulky, inert, inorganic materials are known to burgeon out due to the high surface area of nanosized particles. Nature and proportion of silica nanoparticles as well as polymers exhibited remarkable impact on the fabrication and quality of casted films. Hydrophilic silica nanoparticulate-PVA films depicted better mechanical properties like thermal plus photo stability. Hydrophobic silica nanoparticulate-PMMA films showed qualities of a robust, active, thermostable, antimicrobial material that could resist extreme storage and processing conditions. Overall, these metal oxide nanoparticle-polymer composite films possess qualities reflecting their potential in food, pharmaceutical, and cosmetic industry.

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Transparent UV-absorbers thin films of zinc oxide: Ceria system synthesized via sol–gel process

Cited by 38 publications

References 22 publications

Lignin as a UV Light Blocker—A Review

Lignin as a UV Light Blocker—A Review

Polydimethylsiloxane/Additive Systems for Thermal and Ultraviolet Stability in Geostationary Environment

Versatile SiO₂ Nanoparticles@Polymer Composites with Pragmatic Properties

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Transparent UV-absorbers thin films of zinc oxide: Ceria system synthesized via sol–gel process

Cited by 38 publications

References 22 publications

Lignin as a UV Light Blocker—A Review

Lignin as a UV Light Blocker—A Review

Polydimethylsiloxane/Additive Systems for Thermal and Ultraviolet Stability in Geostationary Environment

Versatile SiO2 Nanoparticles@Polymer Composites with Pragmatic Properties

Contact Info

Product

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About

Versatile SiO₂ Nanoparticles@Polymer Composites with Pragmatic Properties