High-molecular polymer containing spiropyran group and preparation method thereof and application thereof

A high-molecular polymer and spiropyran group technology, applied in the field of spiropyran-containing high-molecular polymer and its preparation, can solve the problems of performance and application range limitations, and achieve optimistic market application prospects, Simple method and easy-to-obtain raw materials

Inactive Publication Date: 2016-08-10
GUIZHOU INST OF BIOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the prior art, studies have been made on spiropyran compounds, such as "A Synthetic Method for Spiropyran Polymers" with the patent number 200810039721.8; but its performance and application range are still limited. In view of this, this The researchers provided a new thinking for the synthesis and preparation process of spiropyran polymers, and obtained a new product with structural dissimilation, expanding its application range

Method used

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  • High-molecular polymer containing spiropyran group and preparation method thereof and application thereof
  • High-molecular polymer containing spiropyran group and preparation method thereof and application thereof
  • High-molecular polymer containing spiropyran group and preparation method thereof and application thereof

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Experimental program
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Effect test

Embodiment 1

[0029] In the presence of nitrogen, the spiropyran compound and the polymer were kept away from light and stirred at a stirring speed of 80r / min for 28 hours. After the reaction was completed, the mixture was filtered, and the filter cake was fully washed with tetrahydrofuran, ethanol and water successively, and vacuum dry. The vacuum degree of the vacuum drying is 0.06MPa, and the temperature is 45°C.

[0030] The spiropyran compound is a nitrogen-substituted C 3 Spiropyran derivatives of carboxylic acids.

[0031] The polymer is chitosan.

[0032] The molar ratio of the spiropyran compound and chitosan is 6:1.

[0033] After preparing the spiropyran-modified chitosan, 1 mg of the product was dissolved in 10 mL of ethanol, filtered through a 0.22 mm filter membrane, and the photostimuli response performance was tested by ultraviolet-visible spectroscopy (UV-Vis). determined, as figure 2 As shown in the results, the modified compound has no absorption at around 587nm bef...

Embodiment 2

[0036]In the presence of nitrogen, the spiropyran compound, polymer, and solvent were stirred and reacted at a stirring speed of 80r / min for 48 hours in the presence of nitrogen. After the reaction was completed, the mixture was filtered, and the filter cake was thoroughly washed with tetrahydrofuran, ethanol, and water. Wash and dry in vacuo. The vacuum degree of the vacuum drying is 0.07MPa, and the temperature is 55°C.

[0037] The spiropyran compound is a nitrogen-substituted C 4 Hydroxy spiropyran derivatives.

[0038] The polymer is hyaluronic acid.

[0039] The solvent is N,N-dimethylformamide (DMF), and the dosage is 4:1.

[0040] The molar ratio of the spiropyran compound and hyaluronic acid is 6:1.

[0041] After preparing the spiropyran-modified hyaluronic acid, use the KBr tablet method, and use the Fourier transform infrared spectrometer to scan the infrared spectrum of the compound before and after modification. The wavelength range is from 400 to 4000 cm -1...

Embodiment 3

[0044] The spiropyran compound, polymer, solvent, and condensing agent were stirred and reacted for 36 hours at a stirring speed of 60r / min in the presence of nitrogen, protected from light, and after the reaction was completed, the mixture was filtered, and the filter cake was washed with tetrahydrofuran, ethanol , fully washed with water, and dried in vacuum.

[0045] The spiropyran compound is a carboxyl-containing spiropyran derivative, and the carboxyl group is on the spiropyran ring. The polymer is cellulose. The solvent is tetrahydrofuran in an amount of 5:1. The condensing agent is 1-ethyl-3(3-dimethylpropylamine) carbodiimide (EDCI), and the dosage is 0.25:1. The molar ratio of the spiropyran compound to the cellulose is 8:1. The vacuum degree of the vacuum drying is 0.08MPa, and the temperature is 50°C.

[0046] After preparing the spiropyran-modified cellulose, use the KBr tablet method, and use the Fourier transform infrared spectrometer to scan the infrared sp...

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Abstract

The invention relates to the technical field of high-molecular polymer, and especially to a high-molecular polymer containing spiropyran group and a preparation method thereof and application thereof. The method uses spiropyran compound to perform modification processing for the polymer, makes the polymer graft a spiropyran group which is light/temperature-sensitive, and makes the prepared polymer become a material having light or temperature stimulate-response performance. The limited used polymer is degradable polymer with good biocompatibility, and can control the isomerization of the spiropyran group by using the light/temperature stimulation, and realize the graft modification function of the spiropyran group on the polymer. The prepared product can be objectives-oriented under the stimulation of external light or temperature, and be open to release or realize the function of the product quantificationally and regularly in fixed point.

Description

technical field [0001] The invention relates to the technical field of high-molecular polymers, in particular to a high-molecular polymer containing spiropyran groups and its preparation method and application. Background technique [0002] In recent years, stimuli-responsive functional polymers have aroused widespread interest in academia and industry, and have become a research hotspot in the field of functional polymers. The so-called stimuli-responsive polymers (stimuli-responsive polymers) refer to their ability to respond to subtle physical or chemical changes (stimuli) in the external environment, such as changes in molecular configuration or solubility, or even chemical bond formation or breakage. a class of polymers. Stimuli include light, temperature, pH, ionic strength, electric and magnetic fields, etc. Among them, light is a clean, free, and efficient resource. The use of external light sources to induce structural changes in photoresponsive materials has huge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/08C08B37/04C08B3/14
CPCC08B3/14C08B37/003C08B37/0072C08B37/0084
Inventor 徐青周元敬贾强武玉祥秦华军聂飞
Owner GUIZHOU INST OF BIOLOGY
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