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A kind of dendrimer/polyacrylic acid composite film and preparation method thereof

A technology of dendrimer and polyacrylic acid, which is applied in the field of dendrimer/polyacrylic acid composite film and its preparation, can solve the problems of poor water resistance and mechanical properties of polyacrylic acid film, achieve controllable film diameter and improve mechanical stability , The effect of broadening the scope of application

Inactive Publication Date: 2016-06-22
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of dendrimer / polyacrylic acid composite film and its preparation method in order to solve the problem of poor water resistance and mechanical properties of polyacrylic acid film

Method used

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  • A kind of dendrimer/polyacrylic acid composite film and preparation method thereof
  • A kind of dendrimer/polyacrylic acid composite film and preparation method thereof
  • A kind of dendrimer/polyacrylic acid composite film and preparation method thereof

Examples

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Effect test

Embodiment 1

[0033] A dendrimer / polyacrylic acid composite membrane, the molar ratio of polyacrylic acid and dendrimers in the composite membrane is 2132, the fiber average diameter of the composite membrane is 622nm, and the water flux of the composite membrane is measured at 0.7MPa 420g / (m 2 h).

[0034] A kind of preparation method of dendrimer / polyacrylic acid composite film, concrete steps are as follows:

[0035] Step 1. Prepare the dendrimers to a concentration of 1.7494×10 -5 mol L -1 The 4.5 generation polyamide-amine dendrimer aqueous solution;

[0036] Step 2, preparing polyacrylic acid into an ethanol solution with a concentration of 15.0 wt %;

[0037] Step 3, cooling 0.5 ml of the dendrimer aqueous solution in step 1 and 2.735 g of the polyacrylic acid ethanol solution in step 2 to room temperature and then mixing, and mixing evenly to obtain a mixed solution;

[0038] Step 4. Prepare the mixed solution obtained in step 3 into a film by electrospinning technology; put th...

Embodiment 2

[0041] A dendrimer / polyacrylic acid composite membrane, the molar ratio of polyacrylic acid and dendrimers in the composite membrane is 1162, the fiber average diameter of the composite membrane is 548nm, and the water flux of the composite membrane is measured at 0.7MPa 442g / (m 2 h).

[0042] A kind of preparation method of dendrimer / polyacrylic acid composite film, concrete steps are as follows:

[0043] Step 1. Prepare the dendrimers to a concentration of 1.7494×10 -5 mol L -1 The 4.5 generation polyamide-amine dendrimer aqueous solution;

[0044] Step 2, preparing polyacrylic acid into an ethanol solution with a concentration of 15.4 wt %;

[0045] Step 3, cooling 1.0ml of the dendrimer aqueous solution in step 1 and 2.903g of the polyacrylic acid ethanol solution in step 2 to room temperature and mixing, and mixing evenly to obtain a mixed solution;

[0046]Step 4. Prepare the mixed solution obtained in step 3 into a film by electrospinning technology; put the mixed ...

Embodiment 3

[0049] A dendrimer / polyacrylic acid composite membrane, the molar ratio of polyacrylic acid and dendrimers in the composite membrane is 4114, the fiber average diameter of the composite membrane is 673nm, and the water flux of the composite membrane is measured at 0.7MPa 431g / (m 2 h).

[0050] A kind of preparation method of dendrimer / polyacrylic acid composite film, concrete steps are as follows:

[0051] Step 1. Prepare the dendrimers to a concentration of 1.2187×10 -5 mol L -1 The 5.0th generation polyamide-amine dendrimer aqueous solution;

[0052] Step 2, preparing polyacrylic acid into an ethanol solution with a concentration of 15.4 wt %;

[0053] Step 3. Mix 0.5 ml of the dendrimer aqueous solution in step 1 and 3.581 g of polyacrylic acid ethanol solution in step 2 after cooling to room temperature, and mix evenly to obtain a mixed solution;

[0054] Step 4. Prepare the mixed solution obtained in step 3 into a film by electrospinning technology; put the mixed sol...

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Abstract

The invention relates to a dendrimer / polyacrylic acid composite membrane and a preparation method thereof and belongs to the field of polyacrylic acid composite membranes. The composite membrane is prepared by blending dendrimer serving as a functional component and polyacrylic acid serving as a matrix material and carrying out an electrostatic spinning technology. According to the composite membrane, the dendrimer is used as the functional component and has a precise molecular structure and high geometric symmetry and since a great amount of functional groups exist on the surface of the dendrimer, the dendrimer has multifunctionality and the mechanical property of polyacrylic acid membrane can be improved; the dendrimer is of a nano-sized spherical structure and can provide a site for the introduction of other substances and thus the properties of the composite membrane are further optimized favorably; meanwhile, the alkalinity of the dendrimer can neutralize the acidity of polyacrylic acid, the influence of the pH value of the environment on the properties of the membrane is decreased, the selectivity of the membrane is increased and the scope of application of the composite membrane is expanded.

Description

technical field [0001] The invention relates to a dendrimer / polyacrylic acid composite film and a preparation method thereof. The invention belongs to the field of polyacrylic acid composite film. Background technique [0002] Polyacrylic acid is a hydrophilic polymer and is an excellent material for preparing separation membranes. Because of its good hydrophilicity, large relative molecular mass and charge density, organic / water separation membranes with good mechanical properties can be formed, so it has a wide range of applications in biochemical materials and medicine. However, due to the presence of carboxyl groups on polyacrylic acid, it can have a strong interaction with water through intermolecular hydrogen bonds. At the same time, it is greatly affected by the pH value of the environment, which makes the membrane material swell, and the mechanical properties and selectivity properties disappear. [0003] In the report contained in "Chemical Industry and Engineerin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/40B01D69/12B01D67/00
Inventor 李国平刘亚中罗运军刘梦慧张冉
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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