What is it about?
This novel materials is a hybrid sunscreen from Tamban (Sardiniella fimbrata) bones to prevent from dehydration and sunburn up to 50 minutes. The fish bones were reported had 50 SPF by modifying the structure of calcium and phosphate with metal doping (Fe) as a good UV absorber. The active ingredient from Tamban bones can replace the existing active ingredient that increased the number of free radicals. For example Oxybenzone, TiO2 and ZnO as sunscreen agent in marketed product. Which is much more harmless and sustainable way to produce and use.
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Why is it important?
Current Senario: Titanium dioxide (TiO2) and Zinc oxide (ZnO) which are inorganic ingredients that were used in sunscreen as promising substances for skin barrier from UVB rays, unfortunately there is concern about the possible toxicity of the nanoparticles; although several studies were published on the subject, to date there is no incontestable evidence on this topic. For the TiO2 and ZnO use, however, another possible risk is associated with their photocatalytic properties under UV and visible light. Both minerals are in fact photochemically reactive compounds; this means that, under irradiation, they can form free radicals and other reactive species that can cause some of the health problems associated with UV exposure.
Perspectives
Solution and Advantages: Alternatively, we successfully initiated a HAp-based multiphasic material with UV-absorbing properties and, hence, showing potential as a sunscreen in previous Niche Research Grant Scheme (NRGS). The material was obtained from Sardineilla fimbrata known as Tamban fish bones by modifying them with a novel doping treatment. In this case, the bones were treated in a Fe(II) solution and successively calcined; iron was chosen considering its potential and less toxic than titanium and zinc. The product was a multiphasic material Nanovesicles emulsion (incorporated from the FRGS 2013 formulation) containing, HAp, Fe-substituted HAp and a small amount of hematite, and it absorbed radiation over the whole UV range, without releasing any radical species under irradiation with 50 sun protection factor (SPF).
Assoc Prof Dr Mohd Zul Helmi Rozaini
Universiti Malaysia Terengganu
Read the Original
This page is a summary of: Characterization of Photoprotective Hydroxiapatite from Fringescale sardinella (Valenciennes, 1847) Bones as Natural Sunscreen for Cosmeceutical Treatments, Key Engineering Materials, December 2018, Trans Tech Publications,
DOI: 10.4028/www.scientific.net/kem.792.67.
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