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A kind of porous nanomaterial blend modified membrane and preparation method thereof

A nanomaterial, blending modification technology, applied in the field of membrane materials, can solve the problems of low pure water flux of separation membrane materials

Active Publication Date: 2021-06-08
HENAN INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, the application of polymer membrane materials has become more and more extensive. During the use, many problems have been found in the current membrane materials. The most prominent problem is that the pure water flux of most separation membrane materials is very low.

Method used

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  • A kind of porous nanomaterial blend modified membrane and preparation method thereof
  • A kind of porous nanomaterial blend modified membrane and preparation method thereof
  • A kind of porous nanomaterial blend modified membrane and preparation method thereof

Examples

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Comparison scheme
Effect test

preparation example Construction

[0032] A porous nanomaterial blend modified film, and the preparation method includes the following steps:

[0033] S1. Among the blending: 17 g of polyvinylidene fluoride polymer powder, 1 g porous nanomaterial, 10 g of polyvinylpyrrolidone, 72 g n, N-dimethylacetamide, and then thoroughly mixed, stirred, and the cast film solution was allowed to obtain a cast film solution. The concentration of polyvinylidene fluoride solution was 18%.

[0034] The porous nanomaterials include 5 parts of gas phase white carbon, and 5 parts of nanocarbonite and 5 parts of nanocolite.

[0035] The stirring was first stirred at a low speed for 15 min, and then stirred, stirred for 2.5 h, and the low speed was stirred at 50 R / min, and the high speed was stirred as 200R / min.

[0036] The static is allowed to stand for 5 h in a constant temperature water bath in 75 ° C to remove the bubbles generated when stirring.

[0037] The nano seabub is first modified, and the modified processing process is:...

Embodiment 2

[0041] A porous nanomaterial blend modified film, preparing a porous nanomaterial for polyfial fluoride with polyether sulfone, and other steps.

Embodiment 3

[0043] A porous nanomaterial blend modified film, and the preparation method includes the following steps:

[0044] S1. Among: 1.4.5 g of polyvinylidene fluoride polymer powder, 0.5 g of porous nanomaterial, 5 g of polyvinylpyrrolidone, 80 g n, N-dimethylacetamide, and then thoroughly mixed, stirred, deposition to the cast film liquid. The concentration of polyvinylidene fluoride solution was 18%.

[0045] The porous nano material is nano-bubblestone.

[0046] The stirring was first stirred at a low speed for 20 min, and then stirred, stirred, stirred for 2 h, and the low speed was stirred at 50 R / min, and the high speed was stirred for 200R / min.

[0047] The nano-sea bubbles are first modified, and the modified treatment process is: placing nanoplastite in a plasma treatment instrument, at a plasma discharge frequency of 50 kHz, a pressure of 25PA and a nitrogen gas flow rate of 35 ml / s Treatment of 2 min under conditions.

[0048] The above is allowed to stand for 4 h in a...

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Abstract

The invention provides a porous nanomaterial blended modified membrane and a preparation method thereof, and relates to the technical field of membrane materials. It includes the following steps: S1. Blending: 10-25% of polyvinylidene fluoride / polyethersulfone, 3-15% of polyvinylpyrrolidone, 0.2-2% of porous nanomaterials and 70-80% of bismuth Methyl acetamide weighs raw materials, then fully mixes, stirs, and stands still to obtain a casting solution; the porous nanomaterials include fumed white carbon black, nano sepiolite and nano attapulgite; S2. Membrane making: the casting After the membrane solution is cooled to room temperature, the membrane is formed and dried to prepare a porous nanomaterial blended modified membrane. The porous nanomaterial blend modified membrane prepares the corresponding membrane material by modifying the porous nanomaterial fumed silica, nano sepiolite and nano attapulgite, which greatly increases the pure water of the polymer membrane material. flux and improved mechanical properties.

Description

Technical field [0001] The present invention relates to the field of membrane material, and more particularly to a porous nanomaterial blend modified film and a preparation method thereof. Background technique [0002] With the needs of people's production and the development of global science and technology, membrane materials have developed through the first simplest packaging film to polymer functional films. It has been applied in the field of air purification, sewage wastewater treatment, sea water, and manufacturing artificial organs. In the 40 years of reform, my country's industrial development is very rapid, among the world's manufacturing great powers, with the development of the economy, the pollution generated during production also increases. Since the national manufacturing involves various fields, the size of the substance that causes contaminated substance is getting wider and wider, some are too tens of microns, and some are small to dozens of nanometers, such a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D67/00B01D69/02
CPCB01D67/0079B01D67/0088B01D69/02B01D2325/24B01D2325/36
Inventor 秦爱文李俊张博杨炎福盛海亮
Owner HENAN INST OF ENG
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