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A kind of castor oil-based polyester material, its preparation and application

A technology based on castor oil and polyester, applied in the field of new materials, can solve the problems of harsh reaction conditions, difficult purification, complex reaction conditions, etc., and achieve the effects of mild and simple polymerization conditions, improved dispersion and good dispersion effect

Active Publication Date: 2020-11-24
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a castor oil-based polyester material, its preparation and application in the dispersion of multi-walled carbon nanotubes. -Bromoundecanoic acid is used as the reaction raw material, potassium carbonate is used as the catalyst, and N,N-dimethylformamide is used as the solvent, and the castor oil-based polyester material is synthesized by the principle of step-by-step polymerization, and its molecular weight is relatively large. The prior art polyester synthesis method involves many steps, harsh reaction conditions, high temperature, high pressure, high vacuum environment, complex reaction conditions, low reaction product yield, difficult purification, low molecular weight of polyester and other technical problems

Method used

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  • A kind of castor oil-based polyester material, its preparation and application
  • A kind of castor oil-based polyester material, its preparation and application
  • A kind of castor oil-based polyester material, its preparation and application

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preparation example Construction

[0035] The preparation method of a castor oil-based polyester provided by the present invention uses 11-bromoundecanoic acid as a raw material, potassium carbonate as a catalyst, and N,N-dimethylformamide as a solvent. °C for 18-24 hours to obtain the castor oil-based polyester through stepwise polymerization.

[0036] In some embodiments, the initial concentration of the 11-bromoundecanoic acid in the reaction system is 1-10 mol / L.

[0037] The present invention uses 11-bromoundecanoic acid, a derivative of bio-based raw material castor oil, as the reaction raw material, utilizes the principle of step-by-step polymerization, uses potassium carbonate as the catalyst, N,N-dimethylformamide as the solvent, and a suitable reaction temperature And time conditions, synthetic polyester material, its synthetic route is as follows:

[0038]

[0039] In the preparation method provided by the present invention, the synthesis conditions are simple and mild, and large-scale production...

Embodiment 1

[0055] A preparation method of castor oil-based polyester, carried out according to the following steps:

[0056] Using 11-bromoundecanoic acid, a derivative of castor oil as a renewable resource, as a raw material, N,N-dimethylformamide as a solvent, and potassium carbonate as a catalyst, the concentration of 11-bromoundecanoic acid in the reaction system is 1mol / L. That is, add 0.1mol (0.265g) 11-bromoundecanoic acid and 0.138g potassium carbonate to a round-bottomed flask, then add 1mL N,N-dimethylformamide as a solvent, and react at 60°C for 24h to obtain castor Sesame oil-based polyester P1 is calculated to have a number-average molecular weight of 13,300 through end-group analysis of hydrogen nuclear magnetic spectrum. Its NMR spectrum is shown in figure 1 .

Embodiment 2

[0058] A preparation method of castor oil-based polyester, carried out according to the following steps:

[0059] Using 11-bromoundecanoic acid, a derivative of castor oil as a renewable resource, as a raw material, N,N-dimethylformamide as a solvent, and potassium carbonate as a catalyst, the concentration of 11-bromoundecanoic acid in the reaction system is 1mol / L. That is, add 0.1mol (0.265g) 11-bromoundecanoic acid and 0.1mol (0.138g) potassium carbonate to a round bottom flask, then add 1mL N,N-dimethylformamide as a solvent, and react at 70°C 24h, obtain castor oil-based polyester P2, measure the number average molecular weight of polymer by GPC (chloroform phase), its number average molecular weight is 23300Da, and in the reaction process, the amount of by-product cyclization small molecules is relatively large Less, get purer polyester. Its NMR spectrum is shown in figure 2 .

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Abstract

The invention belongs to the technical field of new materials, and more particularly relates to a castor oil-based polyester material, preparation and application thereof in multi-wall carbon nanotubedispersion. The castor oil-based polyester material is synthesized by using 11-bromoundecanoic acid, a derivative of bio-based castor oil, as a reaction raw material, potassium carbonate as a catalyst and N, N-dimethylformamide as a solvent by using the step polymerization principle. The castor oil-based polyester material has larger molecular weight, good biocompatibility and degradability, thereby solving the technical problems of high temperature, high pressure, high vacuum environment and the like in the polyester synthesis method in the prior art. By using 1-pyrene butyric acid as an endcapping agent of the reaction, the polyester can be provided with pyrene molecule as a functional group, and the PI-PI stacking action of the pyrene molecules and multi-walled carbon nanotubes is utilized to prepare a carbon nanotube-polymer hybrid material so as to improve the dispersibility of the multi-walled carbon nanotubes in solutions.

Description

technical field [0001] The invention belongs to the technical field of new materials, and more specifically relates to a castor oil-based polyester material, its preparation and its application in the dispersion of multi-walled carbon nanotubes. Background technique [0002] Bio-based polyester materials have a wide range of applications due to their good biocompatibility and non-toxic degradation products. Castor oil base is a widely used raw material among the exploited vegetable oils. Castor oil is cheap and can carry out many chemical reactions through its hydroxyl, double bonds and ester bonds. It is a renewable resource with great research and development prospects. Traditional synthesis methods for bio-based polyester materials include ring-opening polymerization, transesterification, etc., but these synthesis methods involve many steps, and the reaction conditions are harsh, requiring high temperature, high pressure, and high vacuum environment, and the reaction con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/00C08K9/04C08K3/04
CPCC08G63/00C08G2230/00C08K3/041C08K9/04
Inventor 李冲徐楚燃李子龙
Owner HUAZHONG UNIV OF SCI & TECH