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Method for synthesizing tough, transparent, fluorescent, antibacterial polyurethane film

A technology of polyurethane film and synthesis method, applied in chemical instruments and methods, luminescent materials, etc., to achieve the effects of excellent mechanical properties, improved coating properties, and excellent elongation at break

Active Publication Date: 2019-09-10
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, research based on diazoalkylurea has mainly focused on its bactericidal properties after compounding with various bactericides, and the preparation of hyperbranched polyurethane materials using the reactivity of its four methylol groups and isocyanate groups has not yet been seen. Related reports

Method used

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  • Method for synthesizing tough, transparent, fluorescent, antibacterial polyurethane film
  • Method for synthesizing tough, transparent, fluorescent, antibacterial polyurethane film
  • Method for synthesizing tough, transparent, fluorescent, antibacterial polyurethane film

Examples

Experimental program
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Effect test

Embodiment 1

[0025] This embodiment includes the following steps:

[0026] (1) Put the polytetrahydrofuran ether diol 1000 in a vacuum drying oven, and dry it overnight at 85°C. The next day, after the vacuum drying oven cools down to room temperature, take out the tetrahydrofuran ether diol 1000 for later use.

[0027] (2) Add 100015.4 parts of dried polytetrahydrofuran ether glycol, 2.2 parts of dicyclohexylmethane-4,4'-diisocyanate, and 1.82 parts of isophorone diisocyanate into a round bottom flask equipped with a magnetic heating stirrer , dry 20 parts of N,N'-dimethylformamide, 0.07 parts of dibutyltin dilaurate, react at 85°C for 1 hour, add 80 parts of N,N'-dimethylformamide for dilution, add diazoalkyl 0.31 parts of urea, after the diazolidinyl urea was completely dissolved, the reaction was continued at 90°C for 2 hours, and the system was supplemented with 80 parts of N,N′-dimethylformamide for dilution, and the reaction was continued at 90°C for 2 hours.

[0028] (3) Transfer ...

Embodiment 2

[0030] This embodiment includes the following steps:

[0031] (1) Put polytetrahydrofuran ether diol 1000 and polyethylene glycol 1000 in a vacuum drying oven, and dry overnight at 85°C. The next day, after the vacuum drying oven cools down to room temperature, take out tetrahydrofuran ether diol 1000 for later use.

[0032] (2) Add 10007.25 parts of dried tetrahydrofuran ether diol, 7.25 parts of dry polyethylene glycol 1000, and 4.5 parts of dicyclohexylmethane-4,4'-diisocyanate into a round bottom flask equipped with a magnetic heating stirrer , dry 20 parts of N,N'-dimethylformamide, 0.03 parts of stannous octoate, 0.03 parts of dibutyltin dilaurate, react at 85°C for 1.2h, add 80 parts of N,N'-dimethylformamide For dilution, add 1.0 parts of diazosyl urea, after the diazosyl urea is completely dissolved, continue to react at 90°C for 2 hours, add 80 parts of N,N'-dimethylformamide to the system for dilution and continue to react at 85°C for 2 hours .

[0033] (3) Transf...

Embodiment 3

[0035] This embodiment includes the following steps:

[0036] (1) Put polytetrahydrofuran ether diol 1000 and polycaprolactone 1000 in a vacuum drying oven, and dry overnight at 85°C. The next day, after the vacuum drying oven cools down to room temperature, take out tetrahydrofuran ether diol 1000 for use.

[0037] (2) Add 10006.75 parts of dried tetrahydrofuran ether diol, 6.75 parts of dry polycaprolactone, and 2.4 parts of dicyclohexylmethane-4,4'-diisocyanate into a round-bottomed flask equipped with a magnetic heating stirrer, Dry 20 parts of N,N'-dimethylformamide, 0.03 part of stannous octoate, 0.05 part of pyridine, react at 85°C for 1.1h, add 50 parts of N,N'-dimethylformamide for dilution, add diazo 1.8 parts of alkyl urea, after the diazoalkyl urea is completely dissolved, continue to react at 90°C for 2h, add 110 parts of N,N'-dimethylformamide to the system for dilution and continue to react at 85°C for 2h.

[0038] (3) Transfer the round-bottomed flask to a vacuu...

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Abstract

The invention discloses a method for synthesizing a tough, transparent, fluorescent, antibacterial polyurethane film. The method comprises the steps: drying macromolecular diol in a vacuum drying ovenat 80 DEG C overnight, turning off a heating device the next day, taking out the dried diol after cooling to room temperature, controlling the molar ratio of the macromolecular diol to diisocyanate,performing heating and stirring at 80-90 DEG C for 1 h, then synthesizing an isocyanate-terminated prepolymer solution, then supplementing a solvent to dilute the system, adding diazolidinyl urea, dissolving the diazolidinyl urea completely until the system becomes colorless and transparent completely, performing heating and stirring again for 1-4 hours, transferring the system to the vacuum drying oven for 5-10 minutes, performing vacuuming so as to remove bubbles, then pouring the obtained polymer solution into a polytetrafluoroethylene mold, and performing drying at 60 DEG C for 6-8 days soas to obtain an antibacterial hyperbranched polyurethane flexible film with high toughness, high transparency and fluorescence. The synthesized hyperbranched polyurethane film has excellent mechanical properties, and mainly has excellent elongation at break, fracture strength and toughness.

Description

technical field [0001] The invention belongs to the technical field of polymer material synthesis, and in particular relates to a method for synthesizing a strong, transparent, fluorescent and antibacterial polyurethane film. Background technique [0002] Transparent flexible films can be widely used in flat panel displays, optoelectronic devices, liquid crystal screens and other fields. With the advancement of science and technology, the development and preparation of high-transparency and high-strength thin film materials has become a research hotspot in recent years. Polyurethane is composed of soft segments with a glass transition temperature lower than room temperature and rigid segment blocks with a glass transition temperature higher than room temperature. Due to the thermodynamic incompatibility of the soft and hard segments, the material will undergo microphase separation. Scattering of light shining on the polyurethane surface makes it appear opaque. In addition,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/32C08J5/18C09K11/06
CPCC08G18/3848C08G18/4018C08G18/4277C08G18/4808C08G18/4825C08G18/4854C08G18/6633C08G18/6666C08J5/18C08J2375/08C09K11/06C09K2211/1466
Inventor 张彦峰陈兴幸钟倩云谭继东雷恒鑫
Owner XI AN JIAOTONG UNIV
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