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Highly hydrophilic polyamide acid imide, preparation and use in porous membrane

A water polyamide-imide and polyamide-imide technology, which is applied in the field of polymer compounds, can solve the problems of chemical swelling and high production cost of aromatic PAI, and achieves short reaction time, easy porous separation membrane, and easy popularization. applied effect

Inactive Publication Date: 2009-08-05
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The aromatic PAI used in these works is expensive to make and is easily swelled by the chemicals in the fluid being delivered, while many applications actually require a more hydrophilic PAI

Method used

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  • Highly hydrophilic polyamide acid imide, preparation and use in porous membrane
  • Highly hydrophilic polyamide acid imide, preparation and use in porous membrane
  • Highly hydrophilic polyamide acid imide, preparation and use in porous membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Mix 30.0mmol of tributyl citrate, 45.0mmol of 1,6-hexamethylenediamine and 2.0mmol of triethylamine into a round-bottomed flask, connect it to a rotary evaporator and evacuate to -0.1MPa, and control the temperature at 50°C After 8 hours of reaction, the intermediate was obtained, transferred to a glass container or a metal mold, and continued to slowly heat up to 160°C in vacuum, reacted for 3 hours, and kept the temperature at 160°C for 3 hours, then continued to slowly heat up to 200°C, kept at Vacuum reaction at 200°C for 5 hours to obtain polyamideimide with a glass transition temperature of 217°C.

Embodiment 2

[0044] Mix 20.0mmol of tributyl citrate, 15.0mmol of butanediamine and 2.0mmol of pyridine into a round-bottomed flask, connect it to a rotary evaporator, evacuate to about -0.04MPa, and react at 60°C for 2h. Then, it was transferred to a vacuum oven and heated at 150° C. for 12 hours, and continued to react at 220° C. for 5 hours to obtain a polyamideimide with a glass transition temperature of 110° C.

Embodiment 3

[0046] Mix 10.0mmol of tributyl citrate, 30.0mmol of 1,6-hexanediamine and 50mL of N,N-dimethylformamide, heat and evacuate at 60°C to -0.04MPa for 3 hours, and continue at -0.1 MPa was reacted for 12 hours, then the temperature was raised to 150°C, and the reaction was carried out in vacuum for 12 hours, and the temperature was raised to 200°C to obtain polyamide-imide with a glass transition temperature of 145°C.

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Abstract

The invention discloses a high hydrophilic polyamidoimide, the preparation method thereof and the application thereof in porous membranes, belonging to the technical field of polymer materials. The preparation method comprises the following steps: citrate and aliphatic diamine are mixed evenly by the mol ratio of 1:0.1 to 1:10, catalyst with the ratio being 0.1-10 wt percent of the gross weight of the citrate is added in the reactants and is mixed evenly with the reactants to have condensation polymerization to form a midbody after being heated and depressurized in vacuum, and the high hydrophilic polyamidoimide is obtained after the midbody is gradually heated in a temperature range of 50-250 DEG C for continuous reaction. When the invention is applied to a microporous film, the reaction mass is paved on the surface of glass or metal, a liquid membrane with a certain thickness is cast, and the liquid membrane is gradually heated in a temperature range of 50-250 DEG C by stages in vacuum for 2-24 hours so that the porous membrane with the aperture of 0.1-2.0 micron is formed. The hydrophilicity of the high hydrophilic polyamidoimide prepared by the invention is 3-15 times higher than that of regular aromatic polyamide imide.

Description

technical field [0001] The present invention relates to a kind of macromolecule material—highly hydrophilic polyamideimide, its preparation method and its application in porous membrane, belonging to the technical field of macromolecule compound, and its product is mainly used as filtration separation material and secondary battery isolation membrane material. technical background [0002] Polyamide-imide (PAI) is an engineering plastic. Traditional PAI molecules have both heat-resistant heteroimide groups and flexible amide groups, so they have excellent heat resistance, dielectric properties, Mechanical properties and chemical stability, is an engineering material with excellent performance, widely used in many fields, especially in the electronics industry. In recent years, with the development of PAI preparation technology, high-performance PAI products continue to appear, which broadens the application range of PAI and promotes the development of PAI. There is a very ...

Claims

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Application Information

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IPC IPC(8): C08G73/14C08J9/28C08J5/18B01D71/64H01M2/16H01M50/403H01M50/423H01M50/489
CPCY02E60/12Y02E60/10
Inventor 董坚黄燕飞徐晓红石品叶赛张贝妮刘伟鹿萍
Owner SHAOXING UNIVERSITY
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