What is the HLB value of lipophilic surfactant?
What is the HLB value of lipophilic surfactant?
Hydrophilic–lipophilic balance (HLB) is the balance of the size and strength of the hydrophilic and lipophilic moieties of a surfactant molecule. The HLB scale ranges from 0 to 20. In the range of 3.5 to 6.0, surfactants are more suitable for use in W/O emulsions.
What does a high HLB value indicate for a surfactant?
Higher HLB numbers indicate better water (polar) solubility. Surfactants with low HLB values are more suited for water-in-oil emulsions (W/O), and higher HLB values are better for oil-in-water emulsions (O/W).
What is a low HLB emulsifier?
Emulsifiers with low HLB values are more oil-soluble (lipophilic), while those with higher values are more water-soluble (hydrophilic). In general, emulsifiers with HLB values of 3–6 are lipophilic and best suited for w/o emulsions. Emulsifiers in this range include MDGs and propylene glycol monostearate (PGMS).
Who introduced hydrophilic lipophilic HLB scale?
Griffin in 1949 and its later development in 1954 introduced the HLB system, a semi-empirical method. It is the number on a scale of 1 to 40, as shown in Fig. 1. The HLB value for a given surfactant is the relative degree to which the surfactant is water-soluble or oil soluble.
What is HLB and give its significance?
HLB Scale: Hydrophilic-Lipophilic Balance. HLB Scale. HLB Scale is essentially a ranking of how hydrophilic an amphiphilic molecule (surfactant) is. Developed by Griffin (1949), the HLB Scale ranks the tendency of a surfactant to be hydrophilic or hydrophobic (lipophilic).
What does HLB mean in cosmetics?
hydrophilic-lipophilic balance
HLB is short for hydrophilic-lipophilic balance. Created by William C. Griffin in the late 1940s, the HLB System is one of the most successful strategies for developing stable emulsions.
What is HLB and its significance?
HLB Scale is essentially a ranking of how hydrophilic an amphiphilic molecule (surfactant) is. Developed by Griffin (1949), the HLB Scale ranks the tendency of a surfactant to be hydrophilic or hydrophobic (lipophilic).
What is the relationship between HLB and surfactants or emulsifiers?
HLB is an index of the solubilizing properties of emulsifiers and indicates the type of emulsion (o/w or w/o) that the emulsifier is best suited for (Table 2). HLB values can be calculated based on the molecular structure of the emulsifier or determined empirically.
How do I test HLB?
HLB= E / 5 can be calculated with this equation. E: Percentage by weight of ethyleneoxide • HLB value of fatty acid esters of polyhydric alcohols such as glyceryl monostearate, HLB= 20 [1-(S / A)] is calculated with that equation.
How do you calculate HLB of a surfactant?
Using the following equation: HLB desired = ( % surfactant A ) × ( HLB Surfactant A ) + ( % surfactant B ) × ( HLB Surfactant B . ) A blend of surfactant A, HLB = 7.8, and surfactant B, HLB = 13.4 produces a combination that is water soluble and contributes other desired properties.
How do you calculate HLB mixture?
Which of the following is example of lipophilic surfactant?
Lipophilic surfactants possess low HLB values (1-10) and form W/O (water-in-oil) emulsions. Dish detergents, surfactants for emulsion polymerization, and the following example (SLS = Sodium Lauryl Sulfate) are high HLB surfactants.
How do I choose HLB?
Calculating HLB First, you must determine which are oil-soluble ingredients in your formula, not including the emulsifiers. Next, weigh each of the weight percents of the oil phase ingredients together and divide each by the total. Multiply these answers times the required HLB of the individual oils.