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Biodegradable surfactant and preparation method thereof

A surfactant and biodegradation technology, used in chemical instruments and methods, dissolution, chemical/physical processes, etc., can solve problems such as limitations, and achieve the effect of simple operation, simple product purification, and improved hydrophilicity.

Pending Publication Date: 2022-05-24
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is worth noting that these polymeric surfactants often cannot have both the advantages of biodegradability and good surface activity: polymeric surfactants that often exhibit excellent rheological behavior and association properties in selective solvents, All are non-biodegradable; at the same time, some polymer surfactants prepared from biodegradable monomers (such as lactic acid, ε-caprolactone) are mostly limited to aggregate into micelles or vesicle structures for solubilization

Method used

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  • Biodegradable surfactant and preparation method thereof
  • Biodegradable surfactant and preparation method thereof
  • Biodegradable surfactant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] This example prepared a poly(lactic acid-hydroxyethyl methacrylate) surfactant PLAMH 1 , the specific process is:

[0080] A magnetic stirring bar was put into the reaction flask, about 3.6 g (40 mmol) of lactic acid monomer and 0.18 g (1.8 mmol) of maleic anhydride (ie, maleic anhydride) were added to the reaction flask, and the stirring was started. It was dehydrated at 130°C for 4 hours under normal pressure, and then vacuumed with a circulating water vacuum pump, and the prepolymerization was continued for 4 hours. After the prepolymerization, 0.02 g of catalyst SnO was added, vacuumed with a rotary vane vacuum oil pump, and polymerized at a temperature of 150° C. for 6 hours. Release the vacuum, add 1.5 g (12 mmol) of hydroxyethyl methacrylate (HEMA), lactic acid monomer, and azobisisobutyronitrile with a total mass of 0.15% maleic anhydride, and polymerize at 90° C. for 2 hours. After the polymerization, the product was dissolved in methanol, and then precipitat...

Embodiment 2

[0084] This example prepared a poly(lactic acid-hydroxyethyl methacrylate) surfactant PLAMH 2 , the specific process is:

[0085] A magnetic stirring bar was put into the reaction flask, and about 3.6 g (40 mmol) of lactic acid monomer and 0.2 g (2 mmol) of maleic acid were added to the reaction flask, and the stirring was started. Under normal pressure, it was dehydrated at a temperature of 140 °C for 4 hours, and then evacuated with a circulating water vacuum pump, and prepolymerized for 4 hours. After the prepolymerization, 0.02 g of catalyst SnO was added, vacuumed with a rotary vane vacuum oil pump, and polymerized at a temperature of 160° C. for 6 hours. The vacuum was released, and 2.6 g (20 mmol) of hydroxyethyl methacrylate, lactic acid monomer, and 0.15% ammonium persulfate of maleic acid were added, and the mixture was polymerized at 100° C. for 1 hour. After the polymerization, the product was dissolved in methanol, and then precipitated and washed with deionized...

Embodiment 3

[0087] This example prepared a poly(lactic acid-hydroxyethyl methacrylate) surfactant PLAMH 3 , the specific process is:

[0088]A magnetic stirring bar was put into the reaction flask, about 3.2 g (36 mmol) of lactic acid monomer and 0.25 g (2.5 mmol) of fumaric acid were added to the reaction flask, and the stirring was started. It was dehydrated at 150°C for 2 hours under normal pressure, then evacuated with a circulating water vacuum pump, and prepolymerized for 12 hours. After the prepolymerization, 0.05g of catalyst SnO was added, vacuumed with a rotary vane vacuum oil pump, and polymerized at a temperature of 180°C for 5h. Release the vacuum, add 3.6 g (28 mmol) of methyl acrylate and lactic acid monomers, potassium persulfate with 0.1% of the total mass of fumaric acid charged, and polymerize at 150° C. for 6 hours. After the polymerization, the product was dissolved in methanol, and then precipitated and washed with deionized water. After filtration, the filter resi...

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Abstract

The invention provides a biodegradable surfactant and a preparation method thereof, which are characterized in that a cheap and easily available bio-based lactic acid (LA) monomer is used as a raw material, and a polylactic acid (PLA) chain segment is used as a hydrophobic part of a polymer surfactant; meanwhile, hydroxyethyl (meth) acrylate and derivatives thereof are used as hydrophilic parts of the surfactant, and different monomers are selected in the same technological process to realize surface activity adjustment; the preparation method is simple and easy to implement, and can be well applied to solubilizing and loading, emulsion polymerization and preparation of a dispersion system.

Description

technical field [0001] The invention belongs to the field of surfactants, and in particular relates to a biodegradable surfactant and a preparation method thereof. Background technique [0002] As a class of important fine chemicals, surfactants play an important role in fine chemicals and are used in many fields of people's lives and industrial production. Most of the commonly used surfactants use petrochemical products as raw materials. With the improvement of people's requirements for quality of life and health, the biodegradability and toxicity of surfactants are also highly concerned. [0003] In the prior art, the method for preparing a polymer surfactant includes using polyethylene glycol (PEG) as a hydrophilic part, and further polymerizing it with a hydrophobic monomer (such as various acrylates, styrene, etc.) Hydrophilic polymer surfactants; use alkyl surfactants or acrylic derivatives containing phosphate, sulfonate, and quaternized groups as the hydrophilic pa...

Claims

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Application Information

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IPC IPC(8): C08F283/01C08F220/20C08F220/38C09K23/52
CPCC08F283/01C08F220/20C08F220/382
Inventor 汪朝阳肖颖罗时荷
Owner SOUTH CHINA NORMAL UNIVERSITY
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