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Hyperbranched poly(amido amine) having pH and temperature dual responsiveness and preparation method thereof

A polyamidoamine and responsive technology, which is applied in the fields of hyperbranched polyamidoamine and its preparation, polymers and its preparation, can solve the problems of limited application, complex synthesis and purification of target polymers, etc. The effect of high rate and wide source of raw materials

Inactive Publication Date: 2008-08-27
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this work is that the synthesis and purification of the obtained target polymer are complicated, which limits its application in actual production

Method used

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  • Hyperbranched poly(amido amine) having pH and temperature dual responsiveness and preparation method thereof
  • Hyperbranched poly(amido amine) having pH and temperature dual responsiveness and preparation method thereof
  • Hyperbranched poly(amido amine) having pH and temperature dual responsiveness and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 3.084g (20mmol) N, N-methylenebisacrylamide and 1.291g (10mmol) 1-(2-aminoethyl) piperazine were dissolved in the mixed solvent of 30mL methanol and water (volume ratio of methanol to water 2:1), magnetically stirred in an oil bath at 50°C for 150 hours, then added 2.265 g (15 mmol) amantadine to the reaction flask, and continued to react with magnetic stirring at 50°C until the double bond was completely reacted and exhausted . The obtained product was precipitated several times in acetone and dried in vacuum to obtain light yellow hyperbranched polyamidoamine with dual responsiveness to pH and temperature. Yield 94.6%.

[0023] The contents of each component of the obtained polymer are as follows: the weight percent content of the adamantyl group is 23.0%, the weight percent content of the secondary and tertiary amine groups is 9.7%, the weight percent content of the methylene group is 38.1%, and the amide group The weight percent content is 29.2%. The molecular we...

Embodiment 2

[0026] The hyperbranched polyamidoamine in embodiment 1 is made into the aqueous solution of 10mg / mL, adjusts its pH value by dropwise the dilute hydrochloric acid of 0.1mol / L or the dilute sodium hydroxide aqueous solution of 0.1mol / L, to different pH The aqueous solution of hyperbranched polyamidoamine was tested for light transmittance at an absorption wavelength of 500 nm. attached Figure 3 is The light transmittance curve of the polymer aqueous solution as a function of pH at 10°C. As can be seen from the figure, the aqueous solution of the polymer is clear and transparent when the pH is less than 10.5, and the light transmittance is 100%; when the pH is around 11.0, the light transmittance drops rapidly, and the solution becomes very turbid; When greater than 11.5, the light transmittance becomes 0. It can be seen that the polymer's response to pH occurs at a pH of about 11.0.

Embodiment 3

[0028] According to the proportioning of Example 1, 1-(2-aminoethyl)piperazine is replaced with 4-aminomethylpiperidine, and the hyperbranched polyamidoamine is prepared through the same steps, and the weight percentage content of each component is as follows : Adamantyl groups 24.7%, secondary and tertiary amine groups 7.9%, methylene groups 35.9%, amide groups 31.5%. The polymer was made into a 10 mg / mL aqueous solution, and its pH value was adjusted by adding 0.1 mol / L dilute hydrochloric acid or 0.1 mol / L dilute sodium hydroxide aqueous solution dropwise. The polyamidoamine aqueous solution was tested for light transmittance at an absorption wavelength of 500nm. The results show that the aqueous solution of the polymer is clear and transparent when the pH is less than 8.6, and the light transmittance is 100%; when the pH is around 9.0, the light transmittance drops rapidly, and the solution becomes very turbid; Transmittance becomes 0. It can be seen that the polymer's r...

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Abstract

The invention relates to a hyper branched polyamide amine with dual response character of pH and temperature and a relative preparation method, belonging to the technical field of functional polymer material. The preparation method comprises arranging diene monomer and polyamine monomer at the mol ratio of 2:1 into a polar solvent to be polymerized to obtain hyper branched polyaminde amine with one double bond, adding over blocking agent into the reaction system to seal end, depositing and washing via acetone, and drying in vaccum, to obtain the hyper branched polyamide amine with dual response character of pH and temperature. The product contains 23.0-26.0% of adamantane group, 7.9-9.7% of secondary amine and tertiary amine groups, 29.7-38.1% of methylene, 0-2.9% of methyl and 29.2-33.1% of amide group. The hyper branched polyamide amine has simple synthesis, high response sensitivity to pH and temperature and adjustable response range, which can be used in intelligent sensor and drug targe controlled release or the like.

Description

technical field [0001] The invention relates to a polymer in the technical field of polymer materials and a preparation method thereof, in particular to a hyperbranched polyamidoamine with dual responsiveness to pH and temperature and a preparation method thereof. Background technique [0002] In recent years, environmentally responsive hyperbranched polymers have attracted extensive attention. Hyperbranched polymers have structural characteristics and advantages that traditional linear polymers do not have. For example, they are spherical macromolecules, contain a large number of terminal functional groups and internal cavities, and are easy to synthesize. Therefore, the use of hyperbranched polymers to develop functional materials has great potential. Broad prospects. Here, the introduction of functional groups into the structural units of hyperbranched polymers can greatly expand its application fields, such as drug delivery, gene therapy, molecular separation, targeted ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F20/54C08F8/00C08K5/3462C08K5/17
Inventor 郭哲张永文周园园黄卫颜德岳
Owner SHANGHAI JIAO TONG UNIV
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