Colophony/fatty acid sealing end non-ionic surface active agent and preparation method thereof

Abstract

The invention discloses a rosin / fatty acid-capped nonionic surfactant and a preparation method thereof, wherein the rosin is a monocarboxylic acid containing a tricyclic diterpene structure such as ordinary rosin, disproportionated rosin or hydrogenated rosin, and the fatty acid is stearic acid or palmitic acid A monocarboxylic acid with a linear structure such as acid or oleic acid. The invention also discloses the preparation method of the surfactant: adopting a one-pot method for preparation, first esterifying fatty acid with polyethylene glycol to form fatty acid polyethylene glycol monoester, and then reacting fatty acid polyethylene glycol monoester with rosin to form rosin Polyethylene glycol fatty acid esters. The critical micelle concentration of the prepared surfactant is 0.01-0.1mmol / L; the range of surface tension is 40.7-54.8mN / m. The product not only has the high activity of linear surfactants, but also has the high spreading performance of rosin surfactants. It is a new type of functional green surfactant.

Description

technical field

[0001] The invention relates to a novel green surfactant and a preparation method thereof, in particular to a rosin / fatty acid-capped nonionic surfactant and a preparation method thereof. Background technique

[0002] Surfactant is an amphiphilic molecule, that is, it contains both hydrophilic and lipophilic groups in the molecule. Due to their existence, the interfacial properties of substances change significantly. Surfactants are divided into cationic surfactants, anionic surfactants and nonionic surfactants. Nonionic surfactants have good solubility in water and organic solvents, and have high tolerance to changes in the ionic strength and pH of the solution. Because it has various properties such as dispersing, emulsifying, foaming, wetting, solubilizing, etc., it has important uses in many fields. The vast majority of emulsifier products in my country use petrochemical resources as raw materials, which have the disadvantages of high dependence on pet...

Examples

Embodiment 1

[0018] Weigh stearic acid and polyethylene glycol 200 with a molar ratio of 1:1 and pour them into a four-necked flask, then add catalyst phosphorous acid (0.2% of the mass of polyethylene glycol) to it, heat to 200°C, and react 3 -5h, when the acid value drops to about 10, add ordinary rosin (the molar ratio of rosin to polyethylene glycol 200 is 1:1), raise the temperature to 270°C and react for 4-8h, when the acid value drops to about 10, the reaction is basically completed.

Embodiment 2

[0020] It is basically the same as Example 1, wherein stearic acid can be replaced by any one of palmitic acid and oleic acid, rosin can be replaced by any one of disproportionated rosin and hydrogenated rosin, and polyethylene glycol 200 can be replaced by polyethylene glycol 200. Any one of diol 400, 600, 1000, 2000, 4000.

Embodiment 3

[0022] Basically the same as Example 1, the reaction temperature of the first step reaction fatty acid and polyethylene glycol can be 150-220°C: the reaction temperature can be 150°C, 160°C, 170°C, 180°C, 190°C, 200°C, 210°C , 220°C, the reaction temperature of the second step reaction fatty acid polyethylene glycol monoester and rosin is 220-280°C, for example, 220°C, 230°C, 240°C, 250°C, 2,60°C, 2,70°C can be selected , 280°C.

technical field

[0001] The invention relates to a novel green surfactant and a preparation method thereof, in particular to a rosin / fatty acid-capped nonionic surfactant and a preparation method thereof. Background technique

[0002] Surfactant is an amphiphilic molecule, that is, it contains both hydrophilic and lipophilic groups in the molecule. Due to their existence, the interfacial properties of substances change significantly. Surfactants are divided into cationic surfactants, anionic surfactants and nonionic surfactants. Nonionic surfactants have good solubility in water and organic solvents, and have high tolerance to changes in the ionic strength and pH of the solution. Because it has various properties such as dispersing, emulsifying, foaming, wetting, solubilizing, etc., it has important uses in many fields. The vast majority of emulsifier products in my country use petrochemical resources as raw materials, which have the disadvantages of high dependence on pet...

Examples

Embodiment 1

[0018] Weigh stearic acid and polyethylene glycol 200 with a molar ratio of 1:1 and pour them into a four-necked flask, then add catalyst phosphorous acid (0.2% of the mass of polyethylene glycol) to it, heat to 200°C, and react 3 -5h, when the acid value drops to about 10, add ordinary rosin (the molar ratio of rosin to polyethylene glycol 200 is 1:1), raise the temperature to 270°C and react for 4-8h, when the acid value drops to about 10, the reaction is basically completed.

Embodiment 2

[0020] It is basically the same as Example 1, wherein stearic acid can be replaced by any one of palmitic acid and oleic acid, rosin can be replaced by any one of disproportionated rosin and hydrogenated rosin, and polyethylene glycol 200 can be replaced by polyethylene glycol 200. Any one of diol 400, 600, 1000, 2000, 4000.

Embodiment 3

[0022] Basically the same as Example 1, the reaction temperature of the first step reaction fatty acid and polyethylene glycol can be 150-220°C: the reaction temperature can be 150°C, 160°C, 170°C, 180°C, 190°C, 200°C, 210°C , 220°C, the reaction temperature of the second step reaction fatty acid polyethylene glycol monoester and rosin is 220-280°C, for example, 220°C, 230°C, 240°C, 250°C, 2,60°C, 2,70°C can be selected , 280°C.