Hydroxyapatite—a promising sunscreen filter

Pal, Abhishesh; Hadagalli, Komalakrushna; Bhat, P Devadas; Goel, Vishesh; Mandal, Saumen

doi:10.1007/s41779-019-00354-2

Cited by 17 publications

(12 citation statements)

References 36 publications

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“…The inorganic oxides like TiO 2 leads to white coloration due to its high refractive index turn downs the aesthetic worth of sunscreens. To defeat the whitening effect, nanoparticle (<100 nm) is preferable for the sunscreen filter's active ingredients 10 . In this study, Fe 3+ substituted HA based nano‐structured ingredients can offer a better protection from harmful UV without any adverse effect on skin 15 .…”

Section: Resultsmentioning

confidence: 90%

“…It has been reported that fine particles in sunscreen filter (<100 nm) are used to have more efficiency in UV absorption over an entire range including both UVA and UVB 10 . Nanoparticle (<100 nm) scatters UVB and UVA, but permits visible light (370‐720 nm) to penetrate, owing to Rayleigh scattering, as the intensity of scattered light depends on the wavelength and is directly proportional to particle radius 10 . The inorganic oxides like TiO 2 leads to white coloration due to its high refractive index turn downs the aesthetic worth of sunscreens.…”

Section: Resultsmentioning

confidence: 99%

“…Hydroxyapatite (HA) (Ca 10 (PO 4 ) 6 (OH) 2 ), which is a primary mineral component of hard tissue (bone, teeth) is a highly stable, biocompatible and non‐toxic material with its application as a bioceramic material 9 . The choice of hydroxyapatite as a sunscreen filter is owing to tune its property of absorption in the UV region with the aid of metal ion incorporation 4,10 . Hydroxyapatite doped with zinc, manganese, chromium and iron has been studied as an active constituent in sunscreen filters, where remarkable UV absorption is noticed with doping of the appropriate amount.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Fe³⁺ substitution on the structural modification and band structure modulated UV absorption of hydroxyapatite

Hadagalli

Shenoy

Shakya

et al. 2021

Int J Applied Ceramic Tech

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The effect of Fe3+ ionic substitution in hydroxyapatite (Ca10‐xFex(PO4)6(OH)2) was studied using structural modifications, resulting in an improvement in UV absorption through a tailored optical band structure. Ca2+ of HA being larger compared to Fe3+ contributes to the shrinkage of the lattice. Undoped HA has a peak at 1085 cm−1 (ʋ3 PO43−) which is shifted to 1033 cm−1 for Fe‐HA, because of the perturbation in HA structure. An improvement of UV absorption in the entire UVA and UVB range with an increase in Fe content because of a decrease in bandgap from 5.9 eV to 2.1 eV with undoped and doped HA. Theoretically obtained band gap and optical behaviour of the systems are well correlated with the experimental findings. Moreover, the use of marine biowaste from cuttlefish bone, as the source of HA; low cost and promising UV absorption can have a potential application as UV protective sunscreen filters.

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Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Fe³⁺ substitution on the structural modification and band structure modulated UV absorption of hydroxyapatite

Hadagalli

Shenoy

Shakya

et al. 2021

Int J Applied Ceramic Tech

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“…This characteristic makes it a great candidate for UV filter, but it does not absorb in the UV region, so the chemical structure was modified to absorb UV radiation 9 . The use of Hap doped with ions (eg, Fe +2 , Fe +3 , Zn +2 , Cr +3 ) is the most used strategy to increase the UV absorption spectrum 13 . Piccirillo and collaborators used cod bones to obtain hydroxyapatite and treated them with Fe(II) solution and successive calcification to obtain the desired inorganic filter 9 .…”

Section: Hydroxyapatitementioning

confidence: 99%

“…Further investigation with Hap‐Fe submitted to laser ablation showed an increased UV absorbance, better control of the particle size and absorption in near‐infrared range, making this ingredient even more suitable for sunscreen applications 15 . More recently, Pal and collaborators reviewed the uses of hydroxyapatite doped with bivalent and trivalent ions and concluded that HAp‐based UV filters are an emerging future cosmetic material 13 . The potential of hydroxyapatite as a physical sun filter was acknowledged by cosmetic industries and its uses was patented 16…”

Section: Hydroxyapatitementioning

confidence: 99%

A short review of alternative ingredients and technologies of inorganic UV filters

Nery

Martinez

Velasco

et al. 2020

J of Cosmetic Dermatology

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Background The growing need to use sunscreens is a concrete reality, and it is associated with the increase in the population's awareness of the ultraviolet (UV) radiation damage. Inorganic UV filters promote the formation of particles/pigments film over the skin surface, reflecting, dispersing, and absorbing the radiation. Investigations of this class of filters demonstrate the emergence of alternative ingredients and new technologies. Aims and Methods In this review, we presented potential candidates for alternative UV inorganic filters, such as hydroxyapatite, cerium dioxide, and hydrotalcite. Results Specialized literature identified hydroxyapatite and cerium dioxide as actives with good performances, with a broad spectrum of absorption against UV radiation. Both of them were considered safe against degradation and skin erythema formation. Inorganic compounds as an alternative to circumvent degradation problems of organic UV filters containing PABA were also analyzed, with hydrotalcite having a good performance in improving the performance of classic ingredients, bypassing photoinstability, and improving safety, in addition to preventing skin irritability. Conclusion Further investigations of these ingredients and interactions with sunscreen formulations are necessary to overall explore their safety and efficacy, encouraging future researches for more inorganic UV filters.

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A bi‐functional nanofibrous composite membrane for wound healing applications

Shakiba,

Pourmadadi,

Hosseini

et al. 2024

Archiv der Pharmazie

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Various wound dressings have been developed so far for wound healing, but most of them are ineffective in properly reestablishing the skin's structure, which increases infection risks and dehydration. Electrospun membranes are particularly interesting for wound dressing applications because they mimic the extracellular matrix of healthy skin. In this study, a potential wound healing platform capable of inducing synergistic antibacterial and antioxidation activities was developed by incorporating bio‐active rosmarinic acid‐hydroxyapatite hybrid (HAP‐RA) with different contents (0.5, 1, and 1.5 wt.%) into the electrospun polyamide 6 (PA6) nanofibers. Then, polyethylene glycol (PEG) was introduced to the nanofibrous composite to improve the biocompatibility and biodegradability of the dressing. The results indicated that the hydrophilicity, water uptake, biodegradability, and mechanical properties of the obtained PA6/PEG/HAP‐RA nanofibrous composite enhanced at 1 wt.% of HAP‐RA. The nanofibrous composite had excellent antibacterial activity. The antioxidation potential of the samples was assessed in vitro. The MTT assay performed on the L929 cell line confirmed the positive effects of the nanofibrous scaffold on cell viability and proliferation. According to the results, the PA6/PEG/HAP‐RA nanofibrous composite showed the desirable physiochemical and biological properties besides antibacterial and antioxidative capabilities, making it a promising candidate for further studies in wound healing applications.

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Hydroxyapatite—a promising sunscreen filter

Cited by 17 publications

References 36 publications

Effect of Fe³⁺ substitution on the structural modification and band structure modulated UV absorption of hydroxyapatite

Effect of Fe³⁺ substitution on the structural modification and band structure modulated UV absorption of hydroxyapatite

A short review of alternative ingredients and technologies of inorganic UV filters

A bi‐functional nanofibrous composite membrane for wound healing applications

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Hydroxyapatite—a promising sunscreen filter

Cited by 17 publications

References 36 publications

Effect of Fe3+ substitution on the structural modification and band structure modulated UV absorption of hydroxyapatite

Effect of Fe3+ substitution on the structural modification and band structure modulated UV absorption of hydroxyapatite

A short review of alternative ingredients and technologies of inorganic UV filters

A bi‐functional nanofibrous composite membrane for wound healing applications

Contact Info

Product

Resources

About

Effect of Fe³⁺ substitution on the structural modification and band structure modulated UV absorption of hydroxyapatite

Effect of Fe³⁺ substitution on the structural modification and band structure modulated UV absorption of hydroxyapatite