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biphasic hair mask
ingredients in biphasic hair mask are:
water - dimethicone- cyclomethicone- betain30%- cetrimonium chloride 30%- hydrolyzed keratin- sodium chloride - preservative
whats a role of NaCl here? does it have effect on the stability of 2 phase( I mean it keeps them seperate)?
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11 Replies
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Salts increase the surface tension of water because you are adding some ionic energy to the hydrogen-bond energy…This is why salts are used in a two phase conditioners. By increasing the surface tension of water in the biphase systems you shorten the separation time of two phases…
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@pepe Since salt is generally a part of Betaine I was thinking more on that line that it has been mentioned as a part of betaine. And of course the function which you mentioned and which is inherent to salt for surfactant systems.
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@pepe salt decreased or increased surface tension of water?
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if your water is perfectly deionized distiled water then the addition of salt will increase the surface tension…
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ok thans pepe
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but I recommend you to add some silicone emulsifer to the formula for better separation and better look…Like peg/ppg 18/18 or peg-12 dimethicone derivatives…Even you can use some amodimethicone
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@pepe PEG-12 Dimethicone is soluble in water how it can seperate 2 phase?
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actually peg-12 dimethicone soluble in both oil and water…the sufficient amount of silicone emulsifier get two phase together and within the shortest possible time make them seperate…Because that ”sufficient amount” is not enough to emulsify them totally…
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@pepe <the sufficient amount of silicone emulsifier get two phase together and within the shortest possible time make them seperate> we suppose have sufficient amount of peg12 dimethicone in our emulsion ok? how it can get two phase together and make them seperate in one moment!!!??
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nature of the chemistry…enough to get them together…not enough to generate a stable emulsion…it is just about the proportion of the silicone emulsifier
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<not enough to generate a stable emulsion> if it is not enought to generate a stable emulsion it doesnt mean it makes the emulsion seperate( a clear 2 seperated phase ), I mean in biphasic hair mask something like peg-12 dimethicone just can solve 2 phase and it can not make them seperate. do u agree with me?
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