The synergistic effect and mechanism of two chemical sunscreens,BEMT and MBBT,have been studied.UV absorption spectrum study suggested that UV absorption peaks of BEMT and MRRT shifted when the polarities of solvents ...The synergistic effect and mechanism of two chemical sunscreens,BEMT and MBBT,have been studied.UV absorption spectrum study suggested that UV absorption peaks of BEMT and MRRT shifted when the polarities of solvents varied.In ethanol,a typical semi-polarity solvent,UV absorption capacity of BEMT was reduced compared to its capacity in a non-polarity solvent of isooctane.While the addition of MBBT can offset the impact of solvent polarity.In terms of emulsions with BEMT as the only sunscreen agent,in vitro test indicated that SPF increased as the solvent polarity rose,and the addition of MBBT can offset this impact.Sunscreen efficient can be significantly enhanced via combining water phased and oil phased sunscreen agents.展开更多
文摘The synergistic effect and mechanism of two chemical sunscreens,BEMT and MBBT,have been studied.UV absorption spectrum study suggested that UV absorption peaks of BEMT and MRRT shifted when the polarities of solvents varied.In ethanol,a typical semi-polarity solvent,UV absorption capacity of BEMT was reduced compared to its capacity in a non-polarity solvent of isooctane.While the addition of MBBT can offset the impact of solvent polarity.In terms of emulsions with BEMT as the only sunscreen agent,in vitro test indicated that SPF increased as the solvent polarity rose,and the addition of MBBT can offset this impact.Sunscreen efficient can be significantly enhanced via combining water phased and oil phased sunscreen agents.
