Pandect of Ester surfactants (1): Definition
Definition of Ester surfactants:
In the molecule, it has:
(1), One or more -C(=O)O- functional group.
(2), Zero or more -OH, -C(=O)N-, -O- and so on functional group.
(3), No -OSO3-, -SO3-, (C2H4O)n(n>1) and so on functional group.
Different from the strong hydrophilic structure such as -OSO3-, the hydrophilicity of -C(=O)O- structure is weak.
General formula:
According to R, R1, ester surfactants can be subdivided into many types.
Examples are as follows:
(1), Alkanol alkanoate: R, R1: CnH2n+1;
(2), Enoic acid enol ester: R, R1: CnH2n-1;
(3), Glyceryl monoalkanoate: R: CnH2n+1; R1: CH2(OH)CH(OH)CH2-;
(4), Lactide;
(5), Lactone.