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Method for removing PM2.5 (Particulate Matter 2.5) by utilizing surface-active substances of artificial lung

A technology of surface active substances and artificial lungs, which is applied in the field of nanomaterial preparation to achieve the effect of increasing the contact area, strong operability and simple method

Inactive Publication Date: 2017-06-13
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, no artificial lung surfactants similar to DPPC have been used in the preparation of heavy metal ion adsorption materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] a. Modification of silk fibroin

[0025] Dissolve 1mol of SF and 0.5mol of DPPC in 10mL of 0.1M MES solution (pH=5.5, morpholineethanesulfonic acid), add 0.5mol of EDC and NHS such as DPPC after 2 hours, and stir at room temperature for 3 hours Take it out, wash and dry it with water, and finally place the silk fibroin aqueous solution in a freeze-drying apparatus at -80°C to freeze-dry to obtain silk fibroin powder.

[0026] b. Preparation of fiber membrane

[0027] Prepare silk fibroin powder of equal mass and egg yolk lecithin into 5ml of a 3% aqueous solution, put the resulting solution into a syringe, use a No. 7 needle, and use the existing electrospinning equipment. The instrument parameters set are: load The voltage is 15kV, the distance between the injector and the receiving plate is 8cm, the advancing speed is 0.3ml / h, and the relative humidity of the air is 40%. Nanofibers can be obtained after electrospinning is completed.

[0028] Test results: the dust r...

Embodiment 2

[0030] a. Modification of silk fibroin

[0031] Dissolve 1mol of SF and 0.1mol of DPPC in 10mL of 0.1M MES solution (pH=5.5, morpholineethanesulfonic acid), add 0.1mol of EDC and NHS with DPPC after 2 hours, stir at room temperature for 3 hours Take it out, wash and dry it with water, and finally place the silk fibroin aqueous solution in a freeze-drying apparatus at -80°C to freeze-dry to obtain silk fibroin powder.

[0032] b. Preparation of fiber membrane

[0033] Prepare equal mass of silk fibroin powder and 1-myristoyl-2-palmitoylphosphatidylcholine into 5ml of 3% aqueous solution, put the resulting solution into a syringe, use a No. 7 needle, and use the existing For the electrospinning equipment, the instrument parameters are set as follows: the loading voltage is 18kV, the distance between the injector and the receiving plate is 10cm, the advancing speed is 0.1ml / h, and the relative air humidity is 35%. Nanofibers can be obtained after electrospinning is completed.

...

Embodiment 3

[0036] a. Modification of silk fibroin

[0037] Dissolve 0.5 mol of SF and 0.5 mol of DPPC in 10 mL of 0.1 M MES solution (pH=5.5, morpholineethanesulfonic acid), add 0.5 mol of EDC and NHS such as DPPC after 2 hours, and stir at room temperature for 3 hours Then take it out, wash and dry it with water, and finally place the silk fibroin aqueous solution in a freeze-drying apparatus at -80°C to freeze-dry to obtain silk fibroin powder.

[0038] b. Preparation of fiber membrane

[0039] Equivalent mass of silk fibroin powder and dioleoylphosphatidylcholine etc. are configured into 5ml of 3% aqueous solution, and the resulting solution is put into a syringe with a No. 7 needle, using the existing electrospinning equipment, and the equipment The parameters are: the loading voltage is 15kV, the distance between the injector and the receiving plate is 8cm, the advancing speed is 0.2ml / h, the relative humidity of the air is 35%, and the nanofibers can be obtained after electrospinn...

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PUM

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Abstract

The invention relates to a method for removing PM2.5 by artificial lung surface active substances, including the modification of silk fibroin, the preparation of fiber membranes and the adsorption of dust, and the silk fibroin and artificial lung surface active The spinning solution of the substance is prepared into a nanofiber membrane for removing heavy metal ions. The nanofiber membrane is prepared by electrospinning in the present invention, which can effectively control the porosity of the fiber membrane and remove PM2.5 particles of different particle sizes. The invention adopts natural silk fibroin and artificial lung surface active substance, can effectively increase the contact area between the adsorbent and metal ions, and remove heavy metal ions. The film prepared by the invention has the advantages of convenient application, simple method and strong operability.

Description

technical field [0001] The invention relates to the field of preparation of nanometer materials, in particular to a method for removing PM2.5 by artificial lung surfactant, and a method for preparing a fiber membrane for absorbing heavy metal ions. Background technique [0002] Collagen fiber is a polymer material with active groups such as amino groups and carboxyl groups on the surface, and it is also a substance that exists in nature. It can form chelates with metal ions, and we can chemically modify it to strengthen it. The degree of activity of the surface groups improves the performance of adsorbing metal ions. For example, Wang Ru et al. used the principle that the phenolic hydroxyl groups in tannin molecules can coordinate with metal ions, and solidified tannin on skin collagen fibers to prepare a new type of modified adsorbent. The research results showed that the relationship between the adsorbent and the adsorbate The role of is electrostatic binding, and the ads...

Claims

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Application Information

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IPC IPC(8): B01D39/16B01D53/02B01J20/24B01J20/28D01F1/10D01F4/00D04H1/4382D04H1/728B01J20/30
CPCB01D39/1615B01D53/02B01D2239/0208B01D2239/10B01D2257/60B01J20/24B01J20/28038D01F1/10D01F4/00D04H1/4382D04H1/728
Inventor 何丹农朱君易帆乔宇王杰金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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