Abstract
Hydrogel coating was explored to modulate the shape of keratin hair fiber. The motivation was the development of an eco-friendly methodology with non-toxic chemicals to modulate keratin fiber. Polymeric hydrogel of acrylic acid and N-N-dimethylacrylamide was prepared by free-radical polymerization in aqueous solution, using nano-alumina particles as crosslinker and potassium persulfate as an initiator. Physico-chemical properties of the hydrogel was investigated by Fourier transformer infrared spectrum (FTIR), thermal analysis and swelling ratio behavior. After hydrogel coating, morphological modification was observed from straight to curly hair effect. The influence of hydrogel coating on hair fiber was evaluated by perming efficiency supported by X-ray diffraction and morphological characterization (SEM and AFM). The durability of hydrogel coating was tested until four wash processes maintaining around 65% the new configuration of the hair fiber.
Highlights
Hydrogels are polymer networks which are swollen material with water and possess threedimensional structure with tuneable physicochemical properties
These results indicate that the incorporation of alumina nanoparticles as crosslinked agent contributed to the formation of hydrogel
Hydrogel coating was effective in the formation of a new hair configuration
Summary
Hydrogels are polymer networks which are swollen material with water and possess threedimensional structure with tuneable physicochemical properties. Polymeric hydrogels have been described as water-swollen network possessing high flexibility and good biocompatibility (Ahmed, 2015; Vundavalli et al, 2015; Nesrinne and Djamel, 2017). Due to their unique properties, hydrogels have received considerable attention in several applications including tissue engineering (Lee et al, 2011), wound healing (Kamoun et al, 2017), superabsorbents (Guilherme et al, 2015), and drug delivery systems (Li and Mooney, 2016). Hair fiber has a highly organized and cylindrical structure, formed by keratinized cells following a defined design. Successful cosmetic treatments to change the shape of the hair require
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