Which surfactant has the lowest HLB?Question 15Answera.Cetyl alcohol (CH3(CH2)15-OH)b.Polyethylene glycol dodecyl ether (CH3(CH2)11(OCH20CH2)4-OH)c.Sodium lauryl sulfate (CH3(CH2)11SO4-Na+)
Question
Which surfactant has the lowest HLB?Question 15Answera.Cetyl alcohol (CH3(CH2)15-OH)b.Polyethylene glycol dodecyl ether (CH3(CH2)11(OCH20CH2)4-OH)c.Sodium lauryl sulfate (CH3(CH2)11SO4-Na+)
Solution
The Hydrophilic-Lipophilic Balance (HLB) is a measure of the degree to which a surfactant is hydrophilic or lipophilic. The lower the HLB value, the more oil-soluble the surfactant is.
a. Cetyl alcohol (CH3(CH2)15-OH) has an HLB of 15.5. b. Polyethylene glycol dodecyl ether (CH3(CH2)11(OCH20CH2)4-OH) has an HLB of 16.7. c. Sodium lauryl sulfate (CH3(CH2)11SO4-Na+) has an HLB of 40.
Therefore, the surfactant with the lowest HLB is Cetyl alcohol (CH3(CH2)15-OH).
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