I have 4 types of oils : 1-coconut oil 2-olive oil 3-castor oil 4-Aloe Vera Oil
and one type of surfactant (sodium lauryl sulfate) as a base for shampoo preparation , but the problem is that SLS cannot completely emulsify the effective percentage of the oil because of its high hydrophilicity (HLB = 40) , so i think it is reasonable to first determine the HLP of the oil to be emulsified then to prepare a mixture of surfactants , but now another problem arise that is how the optimal mixture can be obtained using either Spans or tweens in addition to SLS ?
Dear Moustafa
Please find some link related with your query.
http://onlinelibrary.wiley.com/doi/10.1002/jps.2600500821/abstract?systemMessage=Wiley+Online+Library+will+have+be+unavailable+on+Saturday+5th+December+from+10%3A00-14%3A00+GMT+%2F+05%3A00-09%3A00+EST+%2F+18%3A00-22%3A00+SGT+for+essential+maintenance.+Apologies+for+the+inconvenience.
http://journal.scconline.org/pdf/cc1968/cc019n02/p00129-p00136.pdf
http://www.ijsr.net/archive/v3i4/MDIwMTMxNTMw.pdf
Please note that generally HLB value will be determined for emulsion / detergent sample, which are having hydrophillic and lipophilic ends/moieties in the sample. Your samples are oil only having lipophilic end in it.
Therefore, as per your decision, to evaluate HLB value of oil samples may not help you to proceed further.
HLB values are relevant in case of non-ionic surfactants i.e. surfactants with polar heads and hydrophobic tails. These may not be of use in your case.
It is rather the required HLB values for your oils that you need to choose the best emulsifier mixture. Attached please find a list which may be useful. In addition, as regards the HLB of the elmulsifiers, be careful to only use Griffin's HLB scale. Unfortunately, I am afraid that the HLB of SDS is not available in this scale.
thank you all for your answers..
Dr Mrs M R Rathod, you are right , the term HLB of oil is misleading but i mean the required HLB of surface active agents system to emulsify the oil .
Lalit Sharma and Jean Paul Canselier , there many sources that say the HLB of SDS =40 .. is this wrong or inaccurate in someway ?
however if the SDS is not suitable for such formulation how can i use an alternative surfactant in which i can utilize the thickening effect of sodium chloride?
Panithi Raknam, try this website: http://www.al-nasir.com/www/PharmCalc/exec_calc.php?ID=hlb
I also have question about HLB value of olive oil. I'd like to make an emulsion using Olive oil as one part of oil phase. does anyone know?
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