What is the HLB system?
Hydrophile Lipophile Balance (HLB) is a way of measuring a substances solubility within water or oil. The HLB system was created as a tool to make it easier to use nonionic surfactants. The HLB system enables you to assign a HLB value to a surfactant and a HLB requirement to the application for that surfactant.
What is HLB value explain?
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 is HLB scale in physical pharmaceutics?
The hydrophilic-lipophilic balance (HLB) number indicates the polarity of the molecules in a range of 1-40, with the most commonly used emulsifiers having a value between 1 and 20. The HLB number increases with increasing hydrophilicity. Lipophilic tails align with oil Hydrophilic heads align with water. 7.
What are HLB emulsifiers?
The HLB of an emulsifier is an expression of its Hydrophile-Lipophile Balance, i.e. the balance of the size and strength of the hydrophilic (water-loving or polar) and the lipophilic (oil- loving or non-polar) groups of the emulsifier.
What is the HLB value for detergents?
The calculated HLB values from both methods can be used to predict the surfactant properties of a surfactant molecule, where a value from 1 to 3 indicates a antifoaming agent; a value from 3 to 6 indicates a W/O emulsifier; a value from 7 to 9 indicates a wetting agent; a value from 8 to 12 indicates an O/W emulsifier; …
Who found HLB system?
William C. Griffin
William C. Griffin of the Atlas Paper Company introduced the HLB system in 1949. Understanding the importance of these hydrophilic-lipophilic proportions, Griffin devised a method to calculate HLB values of nonionic surfactants within a range of 1 – 20.
What is the HLB value for detergent?
Who proposed HLB system?
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 the HLB value of detergent?
What is the HLB value of SLS?
In addition, SLS has a very high HLB value of 40 meaning it is water soluble and it prefers to form o/w emulsions.
What is HLB value of SLES?
Commonly Used Emulsifiers And Their HLB Values
| Commercial Name | Chemical Name | HLB Value |
|---|---|---|
| Sodium lauryl sulfate | Sodium lauryl sulfate | 40 |
| Sodium oleate | Sodium oleate | 18 |
| Span 20 | Sorbitan monolaurate | 8.6 |
| Span 40 | Sorbitan monopalmitate | 6.7 |
How do you measure 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. The HLB values of some of the most frequently used surfactants are shown in Table 11.1.
Do you need to calculate HLB in natural cosmetics?
Particularly in natural & organic cosmetics you don’t need to calculate the required HLB to second decimal digit to find the most suitable emulsifier for your system. In fact, you don’t need to calculate the HLB at all. You know that oil and water do not mix. In order to bind these two phases together, we use a surfactant.
Who was the inventor of the HLB system?
Created by William C. Griffin in the late 1940s, the HLB System is one of the most successful strategies for developing stable emulsions. 1,2 Although it might not be used as much today as in the past, it still remains a valuable time-tested tool used by formulators to select the best surfactants from the many hundreds available to emulsify oils.
Can a HLB system be used to create an emulsion?
The HLB method applies to nonionic (uncharged) surfactants but attempts have been made to broaden the concepts to other surfactant types including silicone surfactants. And using the HLB system to create emulsions is quite simple.
What do you need to know about the HLB of oil?
The Required HLB of the oil is equal to the calculated HLB value of the binary blend of emulsifiers that provides the most stable and aesthetically pleasing emulsion. Table 2: HLB values for mixtures of two stearate ester emulsifiers. One is lipophilic (sorbitan stearate) and the other hydrophilic (polysorbate 20).