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Method for preparing nano-material-doped polymer film

A technology of nanomaterials and polymer films, applied in the field of polymer film preparation, can solve the problems of uneven dispersion and easy falling off of nanomaterials

Active Publication Date: 2012-07-18
黑龙江羲和高级氧化技术与装备工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the technical problems that the nanomaterials in the nanomaterial-doped polymer film prepared by the existing method are unevenly dispersed, easy to fall off, and require additional porogens, and provide a preparation method for the nanomaterial-doped polymer film

Method used

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  • Method for preparing nano-material-doped polymer film
  • Method for preparing nano-material-doped polymer film

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specific Embodiment approach 1

[0030] Embodiment 1: The preparation method of the nanomaterial-doped polymer film of the present embodiment is carried out according to the following steps:

[0031] 1. Weigh 0.1% to 20% of hydrophilic organic nanomaterials, 5% to 30% of polymers, and 50% to 94.9% of organic solvents by mass percentage;

[0032] 2. Add the hydrophilic organic nanomaterial weighed in step 1 into an organic solvent for ultrasonic dispersion, wherein the ultrasonic dispersion power is 50w-1000w, and the ultrasonic dispersion time is 0.1h-10h to obtain a nanomaterial suspension;

[0033] 3. Add the polymer weighed in step 1 to the nanomaterial suspension obtained in step 2. After sealing, heat to 25°C-80°C and stir for 1h-48h, and then stand for defoaming for 2h-48h to obtain cast Membrane fluid;

[0034] 4. Cast the casting solution prepared in step 3 into a liquid film on a flat plate and then immerse it in the coagulation bath for solvent and non-solvent exchange to realize the phase inversio...

specific Embodiment approach 2

[0042] Embodiment 2: This embodiment is different from Embodiment 1 in that the nanomaterial in step 1 is silicon dioxide, titanium dioxide, acidified carbon nanotubes or clay. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0043] Specific embodiment three: the difference between this embodiment and specific embodiment two is that the preparation method of acidified carbon nanotubes is: disperse carbon nanotubes with a mass percentage of 0.1% to 5% in mixed acid and stir for 2h to 48h to obtain acidified carbon nanotubes. Nanotubes; wherein the mixed acid is prepared from concentrated sulfuric acid with a mass percent concentration of 98% and concentrated nitric acid with a mass percent concentration of 65% in a volume ratio of 3:1. Others are the same as in the second embodiment.

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Abstract

The invention provides a method for preparing a nano-material-doped polymer film, and relates to the method for preparing polymer film, mainly solving the technical matters that nanometer materials in the nano-material-doped polymer film prepared by an existing method are uneven and easy to fall off, and an additional pore-forming agent is required for the nano-material-doped polymer film. The method comprises the steps of: performing hydrophilic process and organic process on the nanometer materials; dispersing the processed nanometer materials into an organic solvent to obtain a suspending liquid; adding a polymer into the suspending liquid; sealing; and heating and agitating to obtain a filming liquid; processing the filming liquid on a flat plate by curtain coating way to form liquid film; dipping the liquid film into a coagulating bath to undergo exchange between solvent and non-solvent so as to achieve phase transformation; and dipping the solidified film fallen from the flat plate into deionized water to obtain the nano-material-doped polymer film. The nano-material-doped polymer film provided by the invention can be prepared into micro-filtration film, ultra-filtration film, nano-filtration film, reverse osmosis film, and forward osmosis film, as well as flat film, tubular film or hollow fiber film and related film subassemblies. The nano-material-doped polymer film can be applied to the field of water treatment and chemical engineering separation.

Description

technical field [0001] The present invention relates to a method for the preparation of polymer films. Background technique [0002] Water pollution and water resource shortage have become increasingly prominent and urgently resolved major issues in the environmental field in the 21st century. Due to its high separation efficiency, low energy consumption, small footprint, high degree of automation, and no need for physical and chemical additives, membrane technology has gradually become one of the preferred technologies in the field of water treatment. Most of the membrane materials widely used today are polymer matrix, including polyvinylidene fluoride, polyethersulfone, polysulfone and other engineering plastics, but their strong hydrophobicity causes proteins, carbohydrates, natural organic matter, polysaccharides in water to Pollutants such as organic matter are easy to deposit, adsorb, and clog the membrane surface, thus forming membrane fouling. With the goal of redu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D67/00
Inventor 马军王盼盼
Owner 黑龙江羲和高级氧化技术与装备工程有限公司
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