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Hydrophilicity improvement method of PP film

A hydrophilic and water-soluble polymer technology, applied in chemical instruments and methods, membranes, membrane technology, etc., can solve problems such as complicated procedures and high costs, and achieve improved hydrophilicity, stability, and homogeneity distribution effect

Pending Publication Date: 2021-10-15
苏诺特(苏州)材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the existing methods for hydrophilic modification of semi-permeable membranes are limited by the disadvantages of complicated procedures and high costs.

Method used

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  • Hydrophilicity improvement method of PP film
  • Hydrophilicity improvement method of PP film
  • Hydrophilicity improvement method of PP film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A method for improving the hydrophilicity of a PP film, comprising the following steps:

[0044] Step 1: take the PP film, soak the PP film with 75% ethanol solvent for 30min;

[0045] Step 2: Take deionized water to clean and soak the PP film for 10 minutes, take a 0.5% polyvinyl alcohol solution added with a dispersion medium solvent, and soak the PP film in the polyvinyl alcohol solution for 30 minutes;

[0046] Step 3: Pull out the PP film, and soak the PP film in the crosslinking agent solution for 5 minutes;

[0047] Step 4: The PP film is pulled out and the liquid on the surface is drained to obtain a hydrophilically improved PP film.

Embodiment 2

[0049] A method for improving the hydrophilicity of a PP film, comprising the following steps:

[0050] Step 1: take the PP film, soak the PP film with 75% ethanol solvent for 30min;

[0051] Step 2: take deionized water to clean and soak the PP film for 10 minutes, take a 1% polyvinyl alcohol solution added with a dispersion medium solvent, and soak the PP film in the polyvinyl alcohol solution for 30 minutes;

[0052] Step 3: Pull out the PP film, and soak the PP film in the crosslinking agent solution for 5 minutes;

[0053] Step 4: The PP film is pulled out and the liquid on the surface is drained to obtain a hydrophilically improved PP film.

Embodiment 3

[0055] A method for improving the hydrophilicity of a PP film, comprising the following steps:

[0056] Step 1: take the PP film, soak the PP film with 75% ethanol solvent for 30min;

[0057] Step 2: Take deionized water to clean and soak the PP film for 10 minutes, take a 2% polyvinyl alcohol solution added with a dispersion medium solvent, and soak the PP film in the polyvinyl alcohol solution for 30 minutes;

[0058] Step 3: Pull out the PP film, and soak the PP film in the crosslinking agent solution for 5 minutes;

[0059] Step 4: The PP film is pulled out and the liquid on the surface is drained to obtain a hydrophilically improved PP film.

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Abstract

The invention relates to the field of PP film material preparation methods, and discloses a PP film hydrophilicity improvement method comprising the following steps: 1, taking a PP film, and taking an organic solvent to infiltrate the PP film for 30 min; 2, taking clear water, cleaning the PP film with clear water, soaking the PP film in the clear water for 10 minutes, taking a water-soluble high-molecular polymer solution, and soaking the PP film in the water-soluble high-molecular polymer solution for 30-60 minutes; 3, fishing out the PP film, and soaking the PP film in a cross-linking agent solution for 5-10 minutes; and 4, fishing out the PP film, and draining off the liquid on the surface to obtain the hydrophilic improved PP film. The method for improving the hydrophilicity of the PP film has the advantages of being simple in process and low in cost, and the PP film with the improved hydrophilicity can be applied to microfiltration or ultrafiltration and has excellent water flux and good salt rejection rate.

Description

technical field [0001] The invention relates to the field of preparation methods of PP film materials, in particular to a method for improving the hydrophilicity of PP films. Background technique [0002] Membrane separation technology is a separation technology widely used in the separation, concentration and purification of solutions or gaseous substances. The membrane wall is densely covered with micropores, the stock solution passes through one side of the membrane under a certain pressure, the solvent and small molecular solutes pass through the membrane wall to become the filtrate, and the macromolecular solutes are retained by the membrane to achieve the purpose of material separation and concentration. [0003] The membrane materials referred to in membrane separation technology are mainly semi-permeable membranes, including forward osmosis membranes, reverse osmosis membranes, ultrafiltration membranes, microporous membranes, etc. The characteristics of different c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00
CPCB01D67/0079B01D67/0002B01D67/0006B01D2325/36B01D2323/02
Inventor 赵阳孙源成
Owner 苏诺特(苏州)材料科技有限公司
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