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A kind of ultraviolet radiation mechanically responsive waterborne polyurethane and preparation method thereof

A water-based polyurethane, mechanical response technology, applied in organic chemistry and other directions, can solve problems such as no water-based polyurethane, and achieve the effects of high elastic modulus, high storage modulus, and great application prospects

Active Publication Date: 2021-09-03
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there are no relevant reports on waterborne polyurethanes that produce mechanical responses under ultraviolet light irradiation.

Method used

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  • A kind of ultraviolet radiation mechanically responsive waterborne polyurethane and preparation method thereof
  • A kind of ultraviolet radiation mechanically responsive waterborne polyurethane and preparation method thereof
  • A kind of ultraviolet radiation mechanically responsive waterborne polyurethane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A small molecular monomer with ultraviolet light irradiation mechanical response activity, the small molecular monomer is 2,2-dimethylolpropionic acid-10-(4-(phenylazo)phenoxy) Decyl ester, its chemical structural formula is as shown in formula (I):

[0052]

[0053] Its preparation method is as follows:

[0054]

[0055] Step 1: 4.96g (25mmol) of 4-(phenyldiazenyl) phenol, 15g (50mmol) of 1-10 dibromononane ( M = 300) and 1.64 g (29 mmol) of potassium hydroxide were dissolved in 150 mL of ethanol and protected with nitrogen, then the solution was refluxed at 60 °C for 12 hours, then allowed to cool at room temperature, and the resulting Orange precipitate (ANB).

[0056]

[0057] Step 2: A mixture of 2,2-hydroxymethylpropionic acid (3.35 g, 25 mmol), potassium hydroxide (88% assay; 1.46 g, 28.5 mmol) and DMF (2 mL) and acetonitrile (18 mL) was heated to 100°C for 1 hour. ANB (8.34 g, 20 mol, DMF 40 mL) was added to the warm solution, and stirring was conti...

Embodiment 2

[0061] A water-based polyurethane elastic gasket, made of the following raw materials in mass percentage: 20% polycaprolactone diol, 10% isocyanate, 5% water-based chain extender, 3% UV mechanical response chain extender, neutralizer 3%, water dispersant 59%.

[0062] The polycaprolactone and polycaprolactone diol 1000 commercially available from Jining Company.

[0063] Described isocyanate is the isophorone diisocyanate of commercially available Aladdin brand.

[0064] The water-based chain extender is commercially available Aladdin brand 2,2-dimethylolpropionic acid and trihydroxypropane.

[0065] The UV-responsive chain extender is the 2,2-dimethylolpropionic acid-10-(4-(phenylazo)phenoxy)decyl ester prepared in Example 1.

[0066] The neutralizing agent is commercially available Aladdin brand triethylamine.

[0067] The preparation method of the ultraviolet mechanical response waterborne polyurethane elasticity specifically includes:

[0068] (1) Heat the vacuum-dried...

Embodiment 3

[0075] A water-based polyurethane elastic gasket, made of the following raw materials in mass percentage: 20% polycaprolactone diol, 10% isocyanate, 5% water-based chain extender, 2% UV mechanical response chain extender, neutralizer 3%, water dispersant 60%.

[0076] The polycaprolactone and polycaprolactone diol 1000 commercially available from Jining Company.

[0077] Described isocyanate is the isophorone diisocyanate of commercially available Aladdin brand.

[0078] The water-based chain extender is commercially available Aladdin brand 2,2-dimethylolpropionic acid and trihydroxypropane.

[0079] The UV-responsive chain extender is the 2,2-dimethylolpropionic acid-10-(4-(phenylazo)phenoxy)decyl ester prepared in Example 1.

[0080] The neutralizing agent is commercially available Aladdin brand triethylamine.

[0081] The preparation method of the ultraviolet mechanical response waterborne polyurethane elasticity specifically includes:

[0082] (1) Heat the vacuum-dried...

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Abstract

The invention discloses a water-based polyurethane with a mechanical response to ultraviolet light irradiation, which is prepared from the following raw material components in mass percentages: 15-25% of polyester polyol, 5-15% of polyisocyanate, and 1-15% of water-based chain extender 5%, 10-(4-(phenyldiazo)phenoxy)decyl-3-hydroxy-2-(hydroxymethyl)-2-methylpropionate 0.5~3%, neutralizer 1 ~5%, the balance is water dispersant. The synthesized ultraviolet radiation response waterborne polyurethane smart material is light yellow in color, has no peculiar smell, and has high elastic modulus and storage modulus; it has good mechanical response behavior to ultraviolet radiation. The elastic modulus and storage modulus are greatly reduced, and the flexibility of the material is increased. After removing the ultraviolet radiation, the material returns to its original state immediately without obvious loss of mechanical properties; the material and the metal have good adhesion, so the ultraviolet Waterborne polyurethane elastic materials with mechanical response to light irradiation have good application prospects in the field of smart materials.

Description

technical field [0001] The invention relates to the technical field of polymer smart materials, and more specifically, relates to a mechanically responsive waterborne polyurethane irradiated by ultraviolet light and a preparation method thereof. Background technique [0002] Smart material is a new material that is emerging, and it is one of the development directions of new materials in the future. Photo-irradiation response is one of the smart materials. Photo-responsive polymer materials usually contain molecules or functional groups that can absorb light energy. Under the action of light, certain chemical or physical reactions will occur, resulting in a series of structural and morphological changes. thereby exhibiting a specific function. The groups that produce photochemical transformation under the action of light parameters mainly include azobenzene groups, so conventional water-based polyurethane materials can be modified, and azobenzene units are introduced into p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/32C08G18/34C08G18/42C08G18/66C08G18/75C07C245/08
CPCC07C245/08C08G18/0823C08G18/3206C08G18/3215C08G18/348C08G18/4277C08G18/6659C08G18/755
Inventor 祝方明刘奕均刘冬李思涵梁华晴
Owner SUN YAT SEN UNIV
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