Purification method of polyarylether by using water and alcohol mixed solvent

Abstract

A purification method of polyarylether by using water and an alcohol mixed solvent under high temperature and belongs to the technical field of polymer materials. The method is as below: fully mixing the polyarylether powder with alcohol or n-butyl alcohol or an aqueous solution of the two mixed in any proportion, conducting hydrothermal purification treatment for 20-50 min; and cooling to room temperature, filtering, and drying the obtained polyarylether at 140-160 DEG C for 4-6 h, so as to obtain polyarylether with a low metal ion content. The invention uses a mixed solvent of water and isopropanol or butanol for purifying polyarylether. The introduction of isopropanol and n-butyl alcohol effectively reduces the surface energy of water, and increases the capacity of entering and exiting the honeycomb polyarylether material of water. At higher temperature, the polymer molecule chains have a higher exercise capacity, which facilitates diffusion and desorption of metal ions. After the process is completed, vacuum drying under reduced pressure is carried out to remove the remaining water and n-butyl alcohol and reduce the post-post-treatment time and costs.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a method for purifying polyarylether materials at high temperature using a mixed solvent of water and alcohols. Background technique [0002] Since the polyarylether material was developed in the 1870s, its application range has gradually increased. The development of nearly 40 years has enabled the application of polyarylether materials in many fields, especially in the electronics, medical and food industries, and the application volume is increasing. With the expansion of application fields, the requirements for the purity of products are also getting higher and higher. In order to reduce the content of impurities or metal ions in materials, researchers at home and abroad have conducted extensive research on the purification of polyarylethers. For example, the Japanese patent No. JP2002080588, the patent No. JP2002080589 and the patent No. JP2002080590 ...

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Problems solved by technology

For example, the Japanese patent No. JP2002080588, the patent No. JP2002080589 and the patent No. JP2002080590 use acid or a mixed solution of acidic aqueous solution and organic solvent, wash at room temperature, and then neutralize polyether with alkali. Purification of sulfone, although this method can wash away some ions, but at the same time introduce other impurity ions, and it is difficult to treat the acid waste liquid

The British patent EP0292211 melts or dissolves the polymer in a solvent to form a liquid, and then dissolves it in the water phase to dissolve the inorganic salt, but the process is complicated and the equipment investment is large

U.S. Patent US20050004340 discloses a pressure vessel for washing inorganic salts. By injecting high-pressure and high-temperature water into a high-pressure container filled with materials, the water slowly flows out from the other end of the container after passing through the materials and brings out inorganic salts. The pure water is continuously It is a reasonable purification method to remove impurities by flow to achieve the ideal purification effect, but this purification method is completely completed by water infiltration

Chinese patent CN200510020111.X discloses a method for treating polyarylethersulfone with polyethylene glycol and other surfactants as an aqueous solution to reduce the content of metal ions. This method can effectively reduce the concentration of metal ions in the material, but polyethylene glycol requires Subsequent processing, there are many post-processing steps, and the product cost increases

CN201210131100 discloses a method for washing with acidic aqueous solution and purifying polyaryletherketone resin, but the acidic liquid is easy to corrode the device, and the waste liquid is difficult to handle. After washing, the acidic liquid needs to be washed with pure water to prevent it from remaining in the product

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