Pandect of carboxylate surfactants (1): Definition

Pandect of carboxylate surfactants (1): Definition

Carboxylate surfactants are the oldest surfactants, they are still widely used in various fields. For example, soap that commonly used in daily life is a typical carboxylate surfactant.

The surfactants having carboxylate (-COO^-) functional group.

General formula:

Among:

R：

-- C_nH_2n+1: alkyl carboxylate;

-- C_nH_2n-1: alkenyl carboxylate;

-- C_nH_2n+1-O-(-CH₂CH₂O-)-_mR': saturated fatty alcohol polyoxyethylene ether carboxylate, the typical structure of R' is CH₂;

-- C_nH_2n-1-O-(-CH₂CH₂O-)-_mR': unsaturated fatty alcohol polyoxyethylene ether carboxylate, the typical structure of R' is CH₂;

-- : phenol polyoxyethylene ether carboxylate, the typical structure of R'' is CH₂;

-- Rosin acid group and its derivatives: abietate;

-- Naphthenic base: naphthenate;

-- : lactate;

-- : lactoyl lactate;

-- , R¹: EO, PO or EO/PO chain: amide polyether carboxylate, the typical structure of R⁴ is CH₂;

-- Amino group: amino acid salt. The complete structure is as follows:

    (1), : glutamate;

    (2), : alanine salt;

    (3), : glycine salt;

    (4), : sarcosinate;

    (5), : aspartate;

    (6), : lysine salt;

    (7), : beta-alanine salt;

    (8), : phenylalanine salt;

    (9), Hydrolyzed protein salts (mixtures of amino acid salts).