Preparation and properties of water-in silicone emulsifier modified by Chalcone derivative
Water-in silicone(W/Si)emulsifier(EMCD)with UV absorption capacity was prepared by grafting Chalcone derivative(E)-3-(4-allyloxygen)phenyl-1-(4-methoxyphenyl)propyl-2-alkene-1-ketone(Methoxy-Cha)and allyl polyethylene glycol(APEG-400)onto hydrogen-containing silicone oil(0.18%hydrogen content)chains.EMCD stabilized water-in-silicone emulsion was then synthesized using EMCD as emulsifier and 6 viscosity silicone oil as main oil phase.1HNMR was used to characterize the chemical structure of EMCD,and the influence EMCD mass fraction and m(6 viscosity ilicone oil)∶m(water)on the particle size,stability and rheological properties of emulsion were investigated.The synergistic effect of EMCD combined with methylene bis-benzotriazolyl tetramethylbutylphenol(MBBT)and the sun protection factor(SPF)of sunscreen lotion with EMCD added were explored and analyzed.The results showed that,when m(6 viscosity silicone oil)∶m(water)was in the range of 25.0∶75.0～17.5∶82.5 and w(EMCD)=2.0%～3.0%,EMCD stabilized water-in-silicone emulsion exhibited the best stability and rheological properties.The synergistic efficiency reached the highest up to 5.24%when EMCD and MBBT combined at w(EMCD)=3.0%and w(MBBT)=2.0%.Compared with KF-6017 emulsifier,EMCD could increase the in vitro SPF of the sunscreen lotion from 21.76 to 33.29,and UVA/UVB from 0.433 to 0.587,while EMCD enhanced the broad spectrum protection ability of sunscreen lotion.
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维普
