GLs (GLs) are a class of biosurfactants widely used in detergents, cosmetics, etc., with special biological properties and surface activity. Currently, industrial GLs are mainly obtained by microbial fermentation. However, the structure of GLs obtained by microbial fermentation is relatively fixed and cannot produce novel GLs. So it is necessary to add some modification methods in the synthesis process of GLs to change the structure and properties of GLs.
GLs are amphiphilic, i.e. hydrophilic and hydrophobic. They contain certain reaction sites. Therefore, the synthesis process of GLs can be influenced by chemical modification to generate new modified GL derivatives and improve their added value. The chemical modification changes the structure of GLs and establishes a link between structure and function, thus expanding the application scope of GLs. It is found that the GL derivatives generated by chemical modification can increase their water solubility and improve their surface tension and emulsification properties.
Tab.1 The SL derivatives from selected papers and their applications. (Pala, et al., 2023)
SL- derivatives | Potential applications | |
Head Group modification | Head group modification with amino acids | Charged SL-derivatives |
Lipid tail modification | SL-esters: SL-EE, SL-HE and SL-DE | Emulsifying agents |
SL-esters: SL-ME, SL-EE, SL-PrE, SL-BE, SL-PE, SL-HE, SL-OE | Antibacterial agents Biocompatible immunomodulatory agents |
|
Amino acid conjugated-SLs | Antimicrobial and anti-viral agents | |
Amino acid conjugated-SLs | Food preservative agents | |
Modifications targeting the double bond | Amino acid conjugated-SLs | Antimicrobial and anti-viral agents |
SL-based nanoparticles | Antibacterial agents | |
Short chain SLs (C5–C12), (C10–C14) | Wetting agents | |
Quaternary ammonium SLs | Antimicrobial and Gene transfection agents |
CD BioGlyco investigates chemical modification methods to increase the structural variability of GLs based on traditional microbial fermentation processes. Currently, our chemical modifications are mainly targeted with the modification of sophorolipid (SL). The chemically modified derivatives have better antiviral and antibacterial abilities and their surface tension properties are improved compared with the conventional SLs.
Our chemical modifications during GL synthesis include the following three methods:
Fig.1 Type of SL chemical modification. (CD BioGlyco)
CD BioGlyco improves the properties of SL by modifying the carboxyl terminus of the SL lipid chain. Synthesize SL derivatives, such as SL-ester derivatives and SL amides, by amidating or esterifying the carboxyl terminus. We will compare the emulsification properties, surface tension, etc., of SL derivatives with natural SL. We also further chemically modify the SL derivatives to generate new derivatives.
The double bonds in the lipid tails of SL are more sensitive and can be targeted by chemical modification to synthesize new SL derivatives. We generate short-chain SLs or SLs of different chain lengths by alkaline hydrolysis. We also oxidatively cleave double bonds on SLs by other methods to generate SL-aldehydes, SL amines, quaternary amine SLs, and others.
We enhance the properties of SL by generating its couplings with other compounds. For example, SL-amino acid conjugates synthesized after modification have better surfactant properties and water solubility.
SL is an environmentally friendly, non-toxic, and non-polluting biosurfactant with a wide range of applications. As a comprehensive supplier in the field of new bio-materials, CD BioGlyco offers SL with quality assurance.
CD BioGlyco not only produces natural SL but also researches the application of chemical modification in SL production. We have a professional research team that develops detailed modification strategies according to customer needs. Besides chemical modification, we also provide Natural Extraction-based Carbohydrate Derivative Manufacture Service and Chemical Syntheis-based Carbohydrate Derivative Manufacture Service. If you are interested in obtaining new SL derivatives, please feel free to .
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