Preparation of human hair keratin solution and its application in UV protection
In this paper, human hair keratin solution was prepared from waste hairvia a NaOH/Na2SO3/SDS dissolution system. Taking human hair dissolution rate and keratin extraction rate as test indexes, experiments with variation of the dosage of reagents as well as the reaction temperature and time were carried out to determine the optimum process conditions, which were as following: NaOH 6 g/L, Na2SO3 30 g/L, SDS 10 g/L, reaction temperature 80℃, reaction time 3 h. SDS-PAGE analysis showed that the molecular weight of the hair keratin was 15~37 kDa. The FTIR spectra showed a typical proteins spectrum. Oxidized cotton fabric finished with the prepared human hair keratin solution had good performance for anti-ultraviolet via effectively reducing the ultraviolet transmission of UVA and UVB bands.
