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A temperature-responsive flame-retardant film and its preparation method and application

A flame-retardant film, temperature-responsive technology, applied in thermometers, thermometers using electrical/magnetic components directly sensitive to heat, and electrical devices, etc., can solve the problems of graphene oxide being easy to burn and unable to work continuously for a long time. , to achieve the effects of sensitive temperature responsiveness, overcoming easy combustion consumption, and excellent flame retardancy

Active Publication Date: 2020-12-29
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This property makes graphene oxide have broad application prospects in fire alarm, but the problem is that graphene oxide is easy to burn, and the alarm in a fire can only last for a few seconds, and it cannot work continuously for a long time.
However, how to synergistically modify polyethylene glycol with montmorillonite and graphene oxide to obtain a temperature-responsive flame-retardant film with excellent mechanical properties has not been reported.

Method used

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  • A temperature-responsive flame-retardant film and its preparation method and application
  • A temperature-responsive flame-retardant film and its preparation method and application
  • A temperature-responsive flame-retardant film and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Dissolve 125mg of polyethylene glycol in 50mL of deionized water to obtain a polyethylene glycol solution. After stirring evenly, add 125mg of montmorillonite, and after stirring for 1h, add 11.12mL of graphene oxide (11.24mg mL -1 ), after stirring for 3 hours, adding 0.25mL of tannic acid aqueous solution with a concentration of 5% by weight to obtain a flame retardant coating mixture, and finally vacuumizing the resulting flame retardant coating mixture, and drying it at 50°C, namely A temperature-responsive flame-retardant film (PMG) was obtained.

[0069] The PMG prepared in embodiment 1 is bent and folded with tweezers, such as figure 1 As shown, it can be seen that the PMG prepared in Example 1 can be bent and folded, indicating that the temperature-responsive flame-retardant film of the present invention exhibits moderate mechanical interference to the outside world and has good mechanical elasticity. The usual unavoidable bending, compression and impact will n...

Embodiment 2

[0077] Dissolve 125mg of polyethylene glycol in 50mL of deionized water to obtain a polyethylene glycol solution. After stirring evenly, add 125mg of montmorillonite, and after stirring for 1h, add 1.11mL of graphene oxide (11.24mg mL -1 ), after stirring for 3 hours, 0.1 mL of glutaraldehyde was added to obtain a flame-retardant coating mixture, and finally the obtained flame-retardant coating mixture was vacuumized to remove air bubbles, and dried at 50°C to obtain a temperature-responsive flame-retardant film.

Embodiment 3

[0079] Dissolve 125mg of polyethylene glycol in 50mL of deionized water to obtain a polyethylene glycol solution. After stirring evenly, add 62.5mg of montmorillonite. After stirring, sonicate for 1.5h, add 5.56mL of graphene oxide (11.24mg mL -1 ), after stirring for 2.5 hours, adding 0.2mL of tannic acid aqueous solution with a concentration of 10% by weight to obtain a flame retardant coating mixture, and finally vacuumizing the resulting flame retardant coating mixture, and drying it at 60°C. That is, a temperature-responsive flame-retardant film is obtained.

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Abstract

The invention discloses a temperature response flame-retardant film which is formed by adding montmorillonoid into a polyethylene glycol solution, then, adding graphene oxide and carrying out crosslinking by using a crosslinking agent. The invention further discloses a preparation method of the temperature response flame-retardant film. The preparation method comprises the steps: adding polyethylene glycol into deionized water to obtain the polyethylene glycol solution; then adding montmorillonoid, carrying out ultrasonic treatment, then, adding graphene oxide, carrying out stirring, and then,adding tannic acid; and finally, vacuumizing the obtained flame-retardant coating mixed solution to remove air bubbles, and then, carrying out drying to obtain the temperature response flame-retardant film. The invention further discloses an application of the temperature response flame-retardant film to the aspect of fire detection / prewarning. The invention further discloses an application of the temperature response flame-retardant film to the aspect of a flame-retardant coating. The temperature response flame-retardant film obtained by the invention has excellent mechanical properties andflame retardance, and the resistance of the temperature response flame-retardant film has sensitive temperature response property. The preparation method disclosed by the invention is simple in operation, low in cost and suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the field of film materials, in particular to a temperature-responsive flame-retardant film and its preparation method and application. Background technique [0002] Polyethylene glycol is non-toxic, non-irritating, and has good water solubility. It is widely used in cosmetics, pharmaceuticals, chemical fibers, rubber, metal processing and food processing industries. Polyethylene glycol has certain film-forming properties, but its film mechanical properties are extremely poor and cannot be used in real life. [0003] The patent specification with publication number CN 108424522 A discloses a nanocellulose / polydopamine / polyethylene glycol composite material and a preparation method thereof. The manual records that polyethylene glycol is an electrically neutral polymer, soluble in water and most organic solvents, and has good biocompatibility and degradability, but it does not involve polyethylene glycol in the film aspects of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L71/02C08K3/34C08K3/04C08J5/18C09D171/02C09D5/18C09D7/61D21H21/34D21H19/24D21H19/14G01K7/16G08B17/06
CPCC08J5/18C08J2371/02C08K3/346C09D5/18C09D171/02C08K3/042C09D7/61D21H19/14D21H19/24D21H21/34G01K7/16G08B17/06
Inventor 汤龙程喻志冉张国栋夏乔琦龚丽秀赵丽
Owner HANGZHOU NORMAL UNIVERSITY
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