Influence of cationic polysaccharides on polydimethylsiloxane (PDMS) deposition onto keratin surfaces from a surfactant emulsified system

X-ray fluorescent (XRF) spectroscopy has been employed to examine the influence that cationic polysaccharides have on silicone oil deposition onto keratin surfaces (i.e. hair) when delivered from a shampoo under standard washing conditions. The technique offers a rapid method to examine the influence that ancillary shampoo ingredients have on emulsified silicone oil deposition onto a natural fibrous substrate. Using the technique, we have examined the influence that cationic poly(glucose)s and cationic poly(glactomannan)s have on modulating silicone oil deposition. The data suggests that the largest influencing factor in the deposition of the silicone oil resides in the molecular weight of the cationic polymer. Other factors such as polysaccharide composition and cationic charge play lesser roles in the modulation of the oil deposition. However, cationic charge level does appear to influence the nature of the silicone oil deposition after multiple shampooing treatments, providing a controlling influence which appears to prevent build-up of the silicone oil on the keratin fiber. (C) 2000 Elsevier Science B.V. All rights reserved.