Abstract
Biogenic-silver nanoparticles emerge as new nanosilver platforms that allow us to obtain silver nanoparticles via “green chemistry”. In our study, biogenic-silver nanoparticles were obtained from Iris tuberosa leaf extract. Nanoparticles were characterized by a UV-vis spectroscopy, dynamical light scattering technique. The transmission electron microscope revealed spheric and irregular nanoparticles with 5 to 50 nm in diameter. Antimicrobial properties were evaluated against typical microbial contaminants found in cosmetic products, showing high antimicrobial properties. Furthermore, natural moisturizing cream was formulated with biogenic-silver nanoparticles to evaluate the preservative efficiency through a challenge test, indicating its promising use as preservative in cosmetics.
Highlights
The global cosmetic market is projected to register a CAGR of 4.3% during the forecast period (2016–2022) and is anticipated to reach $429.8 billion by 2022 [1]
When microorganisms come into contact with an inadequately preserved cosmetic product, this can be affected in different ways that include the appearance of mold on the product, separation of phases of the emulsions, loss of viscosity, change in the aroma, or rancidity of fats [2]
Polyphenols and flavonoids are among the most commonly used agents to produce AgNPs by green chemistry through plant extracts [22,23]. These compounds are used as reducing agents to produce silver nanoparticles reacting with a silver precursor
Summary
The global cosmetic market is projected to register a CAGR (compound annual growth rate) of 4.3% during the forecast period (2016–2022) and is anticipated to reach $429.8 billion by 2022 [1]. Every time a new CP is opened, the microorganisms that are present in the atmosphere come in contact with the product. The risk of developing disease from CPs is very low, the bacteria present in these products can cause irritations or infections, especially if the product comes into contact with broken skin. Adverse reactions affect the skin in the form of irritation or peeling and as conjunctivitis, asthma, urticaria, angioedema, or pneumonia [4]. To avoid these problems, substances or additives providing stability are included in the formulation of cosmetic products. There are different forms of conservation that can range from physical, radiation and chemical conservation [5]
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