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Method for recycling waste masks

A technology for recycling and processing masks, applied in the field of fiber material recycling, can solve problems such as low tensile strength, low elongation, cracking, etc., and achieve the effects of improving bonding performance, improving bending resistance, and reducing costs.

Active Publication Date: 2022-06-21
江苏方测建筑工程技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, disposable medical masks are dry waste, which are generally disposed of by landfill and incineration. There are almost no suitable ways to recycle them, which puts a lot of pressure on the environment. Therefore, it is necessary to develop a method that can efficiently recycle waste Disposable mask method
[0003] As one of the most widely used building materials, mortar is mainly used in the construction of internal and external plastering of building walls. However, ordinary mortar has defects such as low tensile strength and low elongation, which lead to quality problems in the project, such as cracking and hollowing , falling off, etc., it will also lead to water leakage, water seepage, etc., which has become a common problem in construction projects
Polypropylene fibers can effectively prevent the surface of the mortar from dehydration and volume shrinkage, and inhibit the appearance of surface cracks. However, there is no research on the use of waste polypropylene products to prepare fibers for the preparation of mortar to improve its crack resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Subtract the nose bridge strip and the surrounding joints of the discarded masks, and cut the remaining part into mask fibers with a length of 15mm and a width of 2mm. Then put the mask fiber into the roughening solution, the sensitization solution, and the palladium chloride solution with a pH of 2 for ultrasonic treatment for 10 minutes, ultrasonic power 240W, and ultrasonic temperature 30°C. The composition of the roughening solution is 90 parts of concentrated sulfuric acid, 100 parts of ammonium persulfate and 1000 parts of water; the composition of the sensitization solution is 20 parts of stannous chloride, 15 parts of hydrochloric acid and 980 parts of water; the palladium chloride solution is 0.3 parts of palladium chloride , 100 parts of water.

[0032] After the treatment, the mask fibers were put into the plating bath for treatment. The plating solution was placed in a constant temperature water bath at a temperature of 60°C. After 10 minutes of treatment, t...

Embodiment 2

[0037] Subtract the nose bridge strip and the surrounding joints of the discarded masks, and cut the remaining part into mask fibers with a length of 15mm and a width of 2mm. Then put the mask fiber into the roughening solution, the sensitization solution, and the palladium chloride solution with a pH of 2 for ultrasonic treatment for 5 minutes, ultrasonic power 200W, and ultrasonic temperature 30°C. The composition of the roughening solution is 90 parts of concentrated sulfuric acid, 100 parts of ammonium persulfate and 1000 parts of water; the composition of the sensitization solution is 20 parts of stannous chloride, 15 parts of hydrochloric acid and 980 parts of water; the palladium chloride solution is 0.5 parts of palladium chloride , 100 parts of water.

[0038] After the treatment, the mask fibers were put into the plating bath for treatment. The plating solution was placed in a constant temperature water bath at a temperature of 60°C. After 10 minutes of treatment, th...

Embodiment 3

[0043] The preparation method of this embodiment is the same as that of Example 1, except that the pH of the palladium chloride solution is 4, and the mask fiber mortar Y2 is finally obtained.

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Abstract

The invention discloses a method for recycling waste masks. The method comprises the following steps: firstly, respectively placing the waste medical masks in a roughening solution, a sensitizing solution and a palladium chloride solution for ultrasonic treatment; the treated waste medical mask is placed in a metal plating solution to be soaked, and then vacuum drying treatment is conducted to obtain the waste medical mask with a metal plating layer on the surface; and finally, cutting the waste medical mask with the plating layer on the surface into mask fibers, and mixing and stirring the mask fibers with cement, river sand and water to obtain the mask fiber mortar. The method provided by the invention can effectively kill residual bacteria on the waste masks, can improve the bonding performance of the masks and a mortar matrix, can improve the fracture resistance and crack resistance of the mortar, can improve the microbial corrosion resistance of the mortar, and can realize recycling of waste resources by using waste materials.

Description

technical field [0001] The invention belongs to the recycling and utilization of fiber materials, in particular to a method for recycling and processing waste masks and improving the performance of mortar. Background technique [0002] The main component of disposable medical masks (DMMs for short) is the polymer material polypropylene PP. Due to the increasing dependence on medical masks, a large number of discarded disposable medical masks will be produced. However, disposable medical masks are dry waste, which are generally disposed of by landfill and incineration. There are almost no suitable ways to recycle them, which puts a lot of pressure on the environment. Therefore, it is necessary to develop a method that can efficiently recycle waste The method of disposable masks. [0003] As one of the most widely used building materials, mortar is mainly used in the construction of internal and external plastering of building walls. However, ordinary mortar has defects such ...

Claims

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Application Information

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IPC IPC(8): C04B20/02C04B18/20C04B28/00
CPCC04B20/023C04B18/20C04B20/02C04B28/00C04B2201/50C04B14/06Y02W30/91
Inventor 陈新杰谢嘉璇张海生郑波储洪强杨晓星毛东建
Owner 江苏方测建筑工程技术有限公司
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