Method for graft modification of polyethersulfone

A technology of graft modification and polyethersulfone, which is applied in the field of polyethersulfone graft modification, can solve the problems of affecting the actual use effect of the membrane and the decrease of the working efficiency of the membrane, so as to increase the service life, improve the hydrophilicity, and Hydrophilic effect

Inactive Publication Date: 2009-11-04
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] At present, gamma ray irradiation is mainly used to graft and modify the finished polyethersulfone membrane, but it is found that when the grafting rate is increased to improve the hydrophilicity of the membrane, there will be problems due to the blockage of the membrane pores by the grafted monomer segments. Defects that lead to a decrease in the working efficiency of the membrane and affect the actual use of the membrane
However, this problem can be effectively avoided by directly modifying the material before the polyethersulfone film is formed, but there is no such product or report yet.

Method used

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  • Method for graft modification of polyethersulfone
  • Method for graft modification of polyethersulfone
  • Method for graft modification of polyethersulfone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～7

[0039] Put 5g of pretreated polyethersulfone powder into the irradiation tube, add 40ml, 50% (v / v) acrylic acid aqueous solution (PES: acrylic acid monomer is 5: 21.04), and then add CuSO 4As a polymerization inhibitor, the concentration in the reaction system is 0.004 mol / L, and the pH value of the system is adjusted to 1.0 with 1 mol / L HCl aqueous solution. Then the irradiation tube was placed under the cobalt source for irradiation, and the experiments with different cobalt source irradiation total doses were set for irradiation modification (as shown in Table 1), and the average dose rate was 0.324kGy / h. The sample was taken out, extracted with triple distilled water for more than 72 hours, and dried in a vacuum oven at 100 degrees Celsius to constant weight.

[0040] The contact angle of water on the surface of the modified PES powder was measured with a contact angle meter; and the grafting rate of the PEI powder was calculated. The test results are shown in Table 1.

...

Embodiment 8～10

[0044] The total cobalt source irradiation dose was set to 5kGy, and different average dose rates were set for irradiation modification (as shown in Table 2). The rest are the same as in Example 1, and the test results are shown in Table 2.

[0045] The embodiment of table 2 different average dose rates

[0046]

Embodiment 11～15

[0048] Put 5g of pretreated polyethersulfone powder into the irradiation tube, add 40ml of acrylic acid aqueous solution with different proportions (w / w) and volume concentration (as shown in Table 3), put the irradiation tube under the cobalt source for irradiation Irradiation dose is 15kGy, and the average dose rate is 0.324kGy / h, the remainder is the same as in Example 1, and the results are shown in Table 3.

[0049] The embodiment of table 3 different proportions and concentration monomer

[0050]

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Abstract

The invention discloses a polyethersulfone graft modification method, which is characterized in that polyethersulfone powder and acrylic monomers are subjected to gamma ray irradiation grafting reaction. The polyethersulfone powder prepared by the method of the present invention has good hydrophilicity, so that the polyethersulfone membrane made of the polyethersulfone powder not only has good hydrophilicity, but also avoids the When grafting, monomer segments may block the membrane pores, and will have better permeability and filtration functions.

Description

technical field [0001] The invention relates to a method for grafting and modifying polyethersulfone. Background technique [0002] At present, the annual sales of membrane separation technology products in the world are about 5 billion US dollars, with an annual growth rate of 8%-15%. It is estimated that by 2005, the world's market sales of separation membranes will reach 8-10 billion US dollars. By 2010, the total sales of the world film market will reach 11.0-13.5 billion US dollars. The annual sales of domestic membrane technology products are about 1 billion to 1.5 billion yuan, with an annual growth rate of about 15%, far exceeding the growth rates of world GDP and domestic GDP respectively, and its development potential and space are huge. [0003] At present, the main obstacle restricting the industrialization of membrane technology is membrane fouling. Selecting the appropriate membrane material or modifying the membrane material is an effective way to prevent m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F290/14C08G75/23
Inventor 侯铮迟邓波李晶谢雷东姚思德张凤英
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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