HLB (Hydrophile-Lipophile Balance)
Because glycolipid biosurfactants are mixtures composed of numerous molecular structures, they do not have an accurate HLB value. The following data are measured using the emulsification method and are for reference only. (There will be differences between different batches, which is normal)
For Sophorolipid SLM model, please refer to this data.
For Sophorolipid SLL model, please refer to this data.
For rhamnolipids SLM, RL-P, ABG, ABG-P, and ABG-PJ, please refer to this data.
CMC (critical micelle concentration)
For the same reason, the CMC concentration of glycolipid biosurfactants, like HLB, does not have an accurate value. The following data were measured using gradient dilution surface tension method and are for reference only. (There will be differences between different batches, which is normal)
Statistics from our many measured data show:
The CMC values of different types of rhamnolipids are generally: 3-15mg/L;
The CMC values of different types of sophorolipids are generally: 2-20mg/L;
The CMC value of the BD series of oilfield products with sophorolipid as the main agent is generally: 5-20mg/L.
illustrate:
The above CMC data is measured directly by dilution of the corresponding model product without pH adjustment;
There are other measurement or calculation methods for CMC concentration, and the data obtained by different methods will have certain differences.
The following is comparative test data of products currently on the market:
APG (alkyl glycoside)::800-1000mg/L;
CAB (daily chemical grade betaine): 240mg/L;
LCS (amino acid surfactant): 2000-3000mg/L;
6501 (coconut oil fatty acid diethanolamide): 360-600mg/L.
The following is the data retrieved from the network:
SLS (sodium lauryl sulfate): ≈2300mg/L;
AES (fatty alcohol polyoxyethylene ether sodium sulfate): ≈1800mg/L.
Effect of pH on surface properties
Within a certain range, pH has little effect on the surface properties of glycolipid surfactants. Not recommended for use when the pH is too low or too high. The following data are measured at 1‰ concentration using an automatic pH meter and surface tension meter and are for reference only. (There will be differences between different batches, which is normal)
For sophorolipid SLM model, please refer to this data.
For sophorolipid SLL model, please refer to this data.
For rhamnolipids SLM, RL-P, ABG, ABG-P, and ABG-PJ, please refer to this data.
Temperature and salt resistance
Sophorolipids, rhamnolipids and oilfield products have good structural and performance stability under high temperature and high salt conditions. However, it is still not recommended to store or use the product at excessively high temperatures and salinity for a long time. Liquid products will freeze at low temperatures, which will not affect product performance and can be continued to be used after thawing. The following data are measured at 1‰ concentration using an automatic surface tensiometer and a constant temperature oven and are for reference only. (There will be differences between different batches, which is normal)
For Sophorolipid SLMP model, please refer to this data.
For rhamnolipid RLMP, RL-P, and ABG models, please refer to this data.
