All the 'curl chemist' articles here on NC are good
Cationic Surfactants in Curly Hair Care Products

The Natural Haven blog is also worth reading
THE NATURAL HAVEN: Expand your Knowledge: Surfactants
THE NATURAL HAVEN: Ingredients : Natural Hair Shopping List

Although not specifically a curly/ hair bent Swiftcraftymonkey is useful
Point of Interest!: Surfactants - what are they?
2a-2c, medium texture, porous/ colour treated. Three years CG. Past bra strap length heading for waist.

CO-wash: Inecto coconut/ Elvive Volume Collagen
Treatments: Komaza Care Matani, coconut/ sweet almond/ fractionated coconut oils, Hairveda Sitrinillah
Leave in: Fructis Sleek & Shine (old), Gliss Ultimate Volume, various Elvive
Styler: Umberto Giannini jelly, Au Naturale styling gelee
Flour sack towel, pixie diffuse or air dry.
Experimenting with: benign neglect