Rosin-based CO2/N2 response type polymerizable surfactant, and preparation method and application thereof

A surfactant and rosin-based technology, which is applied in the field of rosin-based CO2/N2 responsive polymerizable surfactants, can solve problems such as research on responsive surfactants

Inactive Publication Date: 2019-06-11
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The tricyclic rigid skeleton of rosin has strong hydrophobicity, so the active group carboxyl group and double bond can be chemically modified to introduce hydrophilic groups to prepare surfactants with excellent performance. At present, there are many surfactants prepared from rosin However, there are relatively few studies on rosin-based responsive surfactants, so this study uses rosin as a raw material to prepare responsive surfactants and is used to prepare responsive Pickering emulsions and responsive carbon nanotube dispersions.

Method used

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  • Rosin-based CO2/N2 response type polymerizable surfactant, and preparation method and application thereof
  • Rosin-based CO2/N2 response type polymerizable surfactant, and preparation method and application thereof
  • Rosin-based CO2/N2 response type polymerizable surfactant, and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0029] A rosin-based CO 2 / N 2 Responsive polymerizable surfactant, the structural formula of the product is:

[0030]

Embodiment 2

[0032] Rosin-based CO 2 / N 2 The synthesis of responsive polymerizable surfactants includes the following steps:

[0033] 100g (0.33mol, the total amount of abietic acid, neoabietic acid and palustric acid is calculated as 80%, 0.265mol) masson pine rosin, 35g (0.357mol) maleic anhydride, 40g acetic acid, react at 140°C for 4h, add after cooling 100g of glacial acetic acid was crystallized by cooling, and suction filtered to obtain maleopimaric acid.

[0034] Get 40g maleopimaric acid and 14.2g GMA with temperature jacket, stirring device, in the four-necked flask of reflux device, add appropriate amount of hydroquinone therein as polymerization inhibitor (the amount of hydroquinone accounts for about 0.2~0.5% of the total mass of the reactant), triethylamine is used as a catalyst (the amount of triethylamine accounts for about 0.2~0.5% of the total mass of the reactant), in toluene solvent, reflux reaction for 7h, after the reaction is completed, the solvent is rotary evapo...

Embodiment 3

[0037] Surfactant to CO 2 / N 2 Has a very good response effect (attached figure 2 ), and the reversible conversion of MPAGN solution to CO can be judged by the conductivity and pH 2 / N 2 responsiveness. CO 2 Soluble in aqueous solution to form H 2 CO 3 A weak acid solution (pH = 5.2), resulting in the protonation of the tertiary amine group, generating a charged cationic surfactant that increases the conductivity to about 340 μS / cm. When passing N at 60°C 2 drive out CO 2 Afterwards, the weak acidity of the solution disappears (pH=7.4), and the charged cationic surfactant deprotonates back to the original tertiary amine group state, reducing the conductivity to about 177 μS / cm. When CO is introduced again 2 Afterwards, the conductivity rises again to about 340μS / cm (pH=5.2), and this process can be repeated several times to show that MPAGN has a strong effect on CO 2 / N 2 is very responsive (attached image 3 ).

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Abstract

The invention discloses a rosin-based CO2/N2 response type polymerizable surfactant. Maleopimaric acid reacts with glycidyl methacrylate (GMA) for introducing polymerizable monomers, and then an imidization reaction is carried out with N,N-dimethyl-1,3-propane diamine for introducing tertiary amine groups capable of responding to CO2. The surfactant has a response property on CO2/N2, and after CO2is introduced, a water solution is weakly acidic, so that tertiary amine is protonated to form a tertiary amine salt and then is positively charged to become a form of a water-soluble cation; and after N2 is introduced to drive CO2, the positively charged tertiary amine salt is deprotonated to be recovered to an original state of a water-insoluble tertiary amine, and good response reversibility is achieved. The invention also discloses emulsification performance and dispersion performance of the surfactant, a Pickering emulsion and carbon nano tube dispersion liquid prepared by using the surfactant also have good responsiveness to the CO2/N2, and end-group double bonds can be used for preparing a high-molecular surfactant by a polymerization reaction.

Description

technical field [0001] The present invention relates to a kind of green surfactant, relate in particular to a kind of rosin-based CO 2 / N 2 Responsive polymerizable surfactant, preparation method and application in fields such as emulsification and dispersion. Background technique [0002] Carbon nanotubes have attracted extensive attention due to their unique thermal stability, electrical properties and mechanical properties, but the strong π-π interactions and van der Waals forces between carbon nanotube molecules lead to their easy agglomeration, which limits the development of carbon nanotubes. Tubes are widely used. Therefore, effective methods to disperse carbon nanotubes are urgently needed. Amphiphilic molecules are often used to disperse carbon nanotubes, such as surfactants, DNA, ionic liquids, lipids or polymers. When carbon nanotubes are used in the fields of medicine or biochemistry, they often need to be modified into "smart" surfaces to meet the responsi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09F1/04B01F17/52C09K23/52
Inventor 饶小平闫鑫焱宋湛谦商士斌
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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