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Photosensitive discoloration self-healing smart nylon 6 and preparation method thereof

A photochromic and self-healing technology, applied in the field of photochromic self-healing intelligent nylon 6 and its preparation, nylon materials, to achieve the effects of sensitive self-healing performance, sensitive color changing performance and rich practicability

Active Publication Date: 2021-06-01
WUHAN TEXTILE UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, there is currently no report of introducing a spiropyran structure and a ureidopyrimidinone structure (UPy) into the nylon polymer chain to produce a fabric that can display color changes under different light conditions and self-repair the performance of the material. Polymer materials that delay material aging

Method used

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  • Photosensitive discoloration self-healing smart nylon 6 and preparation method thereof
  • Photosensitive discoloration self-healing smart nylon 6 and preparation method thereof
  • Photosensitive discoloration self-healing smart nylon 6 and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] 1) Weigh 1.50 g of pyrimidone derivatives, 3.1 g of hexamethylene diisocyanate, and 12 mg of dibutyltin dilaurate, and react at 70° C. for 12 hours under nitrogen atmosphere to obtain 4.1 g of diisocyanate containing ureido pyrimidone structure.

[0072] Among them, the pyrimidinone derivatives used in this example are the structural formula shown in the description formula A and the specific synthetic route disclosed in the description, and the accompanying drawings figure 1 Its data representation map is given, combined with figure 1 It can be seen that various hydrogen atoms in the molecular structural formula shown in formula A have been correspondingly characterized on the map, which also shows that the pyrimidinone derivative of this example was prepared by using the synthetic route in the specification.

[0073] 2) Weigh 0.57g of spiropyran derivative, 4.1g of diisocyanate containing ureidopyrimidinone structure, 5.1mg of dibutyltin dilaurate, 10ml of nitrogen ni...

Embodiment 2

[0078] 1) Weigh 1.80 g of pyrimidinone derivatives, 3.7 g of hexamethylene diisocyanate, and 16.7 mg of dibutyltin dilaurate, and react at 70° C. for 12 hours under nitrogen atmosphere to obtain 4.9 g of diisocyanate containing ureido pyrimidone structure.

[0079] 2) Weigh 0.67g of spiropyran derivative, 4.9g of diisocyanate containing ureidopyrimidinone structure, 7.3mg of dibutyltin dilaurate, 12ml of nitrogen nitrogen dimethylformamide, the reaction temperature is 25°C, and after 1 hour of reaction Purification waited until the product 4.5g.

[0080] 3) Weigh 40g of caprolactam, 0.44g of deionized water, and 0.4g of concentrated phosphoric acid (85wt%) into a three-necked flask, feed nitrogen to remove oxygen in the system, heat to 250°C, react for 3 hours and condense The device was changed to a vacuum device, the nitrogen gas was turned off, and the vacuum was pumped for 10 minutes at 250°C and a rotation speed of 250r / min. The melt in the three-necked flask had obvious ...

Embodiment 3

[0083] 1) Weigh 2.0 g of pyrimidone derivatives, 4.1 g of hexamethylene diisocyanate, and 20 mg of dibutyltin dilaurate, and react at 70° C. for 12 hours under nitrogen atmosphere to obtain 5.4 g of diisocyanate containing ureido pyrimidone structure.

[0084] 2) Weigh 0.75g of spiropyran derivative, 5.4g of diisocyanate containing ureidopyrimidinone structure, 8.8mg of dibutyltin dilaurate, 14ml of nitrogen nitrogen dimethylformamide, the reaction temperature is 25°C, after 1 hour of reaction Purification waited until the product 5.1 g.

[0085] 3) Weigh 40g of caprolactam, 0.44g of deionized water, and 0.4g of concentrated phosphoric acid (85wt%) into a three-necked flask, feed nitrogen to remove oxygen in the system, heat to 250°C, react for 3 hours and condense The device was changed to a vacuum device, the nitrogen gas was turned off, and the vacuum was pumped for 10 minutes at 250°C and a rotation speed of 250r / min. The melt in the three-necked flask had obvious phenomen...

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Abstract

The invention discloses a photosensitive discoloration self-repairing intelligent nylon 6 and a preparation method thereof, belonging to the technical field of intelligent materials. The present invention introduces a ureidopyrimidone structure and a spiropyran ring structure into the nylon 6 macromolecular chain, and utilizes the breakage and reconstruction of the spiropyran ring to reversibly change the color of the nylon material, while the ureidopyrimidone molecular structure The reversible quadruple hydrogen bond between them can realize the self-healing of nylon 6 material when it deteriorates. The preparation method designed in the present invention is easier to operate, has short reaction time, simple post-treatment, and high yield. The prepared nylon material not only has a long service life but also can show color changes under different light conditions. The field has broad application prospects.

Description

technical field [0001] The invention relates to nylon materials and belongs to the technical field of smart materials, in particular to a photosensitive discoloration self-repairing smart nylon 6 and a preparation method thereof. Background technique [0002] As one of the five major engineering plastics, polyamide (nylon) has the characteristics of high tensile strength, large elastic modulus, excellent wear resistance and self-lubricating properties. Therefore, it is widely used in automobile manufacturing, electronic and electrical industries, mechanical equipment and packaging and other industries are widely used. However, when nylon material is used as a structural part in the machinery industry, the alternating stress it suffers during use will easily cause fatigue cracks inside the nylon material and lead to early failure of the material, shortening its service life. In addition, when fatigue cracks occur inside the nylon material, the existing nylon material cannot ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/48
CPCC08G69/48
Inventor 王雯雯王栋田时友郑玉竹赵青华梅涛徐得立李晓光杨勇刘琼珍
Owner WUHAN TEXTILE UNIV