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A kind of screen window manufacturing method with PM2.5 blocking function

A manufacturing method and screen window technology, applied in the direction of insect prevention, etc., can solve the problems of restricting industrial application, difficult control of parameters, complicated preparation, etc., and achieve the effect of biodegradable specific surface area, easy operation and simple operation

Inactive Publication Date: 2019-06-14
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, porous films using nanofibers for air filtration are mostly prepared by electrospinning, which has high energy consumption, complicated preparation, difficult control of parameters, and certain pollution by adding organic solvents in the spinning process, which limits its industrial application.

Method used

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  • A kind of screen window manufacturing method with PM2.5 blocking function
  • A kind of screen window manufacturing method with PM2.5 blocking function
  • A kind of screen window manufacturing method with PM2.5 blocking function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1) Dilute the cellulose mixed solution with a suitable oxidation degree to obtain a cellulose solution with a concentration of 0.65% (M / V). Take 20mL, 25mL, 30mL, 35mL, and 40mL respectively, and vacuum filter them on a 300-mesh stainless steel screen and PVDF On porous films, micro / nanofibrous porous films are formed, see figure 2 and image 3 . figure 2 Shown is the micro / nanofiber porous film prepared by extracting 30mL. The film is constructed of micro / nanofibers with suitable pore size. image 3It shows that the thickness of micro / nanofiber porous film is suitable. The PVDF porous membrane has a pore size of 200 nm and a diameter of 7.5 cm.

[0040] 2) The micro / nano cellulose porous film obtained in Example 1 was placed upside down on the petri dish containing the PDMS solution, placed in an oven and heated to 50° C. for 4 hours. See Figure 4 and Figure 5 . Figure 4 It shows that the surface morphology of the modified micro / nanofiber porous film has no...

Embodiment 2

[0044] 1) Dilute the cellulose mixed solution with a suitable oxidation degree to obtain a cellulose solution with a concentration of 0.6% (M / V). Take 20mL, 25mL, 30mL, 35mL, and 40mL respectively, and vacuum filter them on a 300-mesh stainless steel screen and PVDF On the porous film, a micro / nanofiber porous film is formed.

[0045] 2) The porous micro / nanocellulose film obtained by suction filtration of 30 mL in Example 2 was placed upside down on the petri dish containing the PDMS solution, placed in an oven and heated to 50° C. for 4 hours. Modified films such as Figure 6 , The film pore size is suitable.

[0046] The PDMS solution of the embodiment adopts Dow Corning SYLGARD184 silicone rubber, wherein the volume ratio of component A and component B is 10:1.

Embodiment 3

[0048] 1) Dilute the cellulose mixed solution with a suitable oxidation degree to obtain a cellulose solution with a concentration of 0.5% (M / V). Take 20mL, 25mL, 30mL, 35mL, and 40mL respectively, and vacuum filter them on a 300-mesh stainless steel screen and PVDF On the porous film, a micro / nanofiber porous film is formed.

[0049] 2) Put the micro / nanocellulose porous film obtained by suction filtration of 30 mL in Example 3 upside down on the petri dish containing the PDMS solution, place it in an oven and heat it up to 50° C. for 4 hours. Modified films such as Figure 7 , the film has a larger pore size.

[0050] The PDMS solution of the embodiment adopts Dow Corning SYLGARD184 silicone rubber, wherein the volume ratio of component A and component B is 10:1.

[0051] It can be seen that the modified cellulose film of the present invention can perform air filtration, effectively block PM2.5 particles, and can be used at room temperature, fast and efficient, degradable,...

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Abstract

The invention discloses a window screen preparation method with a PM2.5 blocking function. The method comprises the following steps: preparing a cellulose mixed solution for proper oxidation; diluting the cellulose mixed solution; obtaining a fiber porous film on a substrate through a filtration assisted gelation film formation method; turning the prepared fiber porous film upside down on the top end of a petri dish with a PDMS solution, wherein the fiber porous film does not contact with the PDMS solution; putting into an oven, and warming to 50 DEG C and heating for 4h to obtain a surface-hydrophobic fiber porous film; and with the surface-hydrophobic fiber porous film as a blocking layer for blocking PM2.5 on the window screen, preparing a light-permeable and air-permeable window screen for blocking PM2.5. The window screen provided by the invention is used for filtering air of PM2.5 and has the advantages of simplicity in experimental operation, high speed and high efficiency, normal-temperature preparation and environment friendliness.

Description

technical field [0001] The invention relates to a preparation method of a cellulose porous film, in particular to the preparation of a porous screen window with PM2.5 blocking performance constructed by plant fibers. Background technique [0002] Natural cellulose is the most abundant biomass resource on the earth. Nanocellulose has the basic structure and properties of cellulose and the typical characteristics of nanoparticles. It is a new type of polymer functional material. Cellulose nanofibers have high crystallinity, The characteristics of high strength and high specific surface area, coupled with light weight, biocompatibility and degradability, have great application prospects in many fields such as papermaking, construction, food, electronic products, and medicine. The common preparation methods of cellulose nanofibers include mechanical method, chemical method and biological treatment method. [0003] With the development of industrial society, environmental pollut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/36C08L1/04E06B9/52
CPCC08J9/36C08J2301/04E06B9/52
Inventor 彭新生陈丽萍叶志镇
Owner ZHEJIANG UNIV