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Composite membrane containing sulfonic acid functionalized hollow nano hydrogel as well as preparation and application thereof

A sulfonic acid functionalized, hollow nanotechnology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., to achieve the effects of improved permeability, improved separation selectivity, and simple preparation process

Inactive Publication Date: 2015-05-06
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the use of hollow structural materials to improve the performance of gas separation membranes in China. This invention mainly introduces the preparation of functionalized hollow nano-hydrogels and the application of hollow nano-hydrogels in membranes to enhance gas transmission performance.

Method used

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  • Composite membrane containing sulfonic acid functionalized hollow nano hydrogel as well as preparation and application thereof
  • Composite membrane containing sulfonic acid functionalized hollow nano hydrogel as well as preparation and application thereof
  • Composite membrane containing sulfonic acid functionalized hollow nano hydrogel as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Preparation of a composite membrane containing sulfonic acid functionalized hollow nano hydrogel.

[0025] The composite membrane has a thickness of 80 μm and is composed of 12.5 g of polyoxyethylene-polycaprolactam block copolymer with a mass fraction of 4% and 0.05 g of functionalized hollow nano-hydrogel, wherein the polyoxyethylene segment accounts for the block The mass fraction of the copolymer is 60%, the polycaprolactam segment accounts for 40% of the mass fraction of the block copolymer, and the functional group selected for the functionalized hollow nano hydrogel is a sulfonate group. The preparation steps are as follows:

[0026] Step 1, preparation of sulfonic acid functionalized hollow nano hydrogel:

[0027] Step 1-1. Add 240mL of absolute ethanol, 30mL of distilled water, and 6mL of ammonia water into a container. After stirring with a magnet for half an hour at room temperature, add an alcohol solution of tetraethoxysilane (18mL of tetraethoxy...

Embodiment 2

[0035] Example 2: Preparation of a composite membrane containing sulfonic acid functionalized hollow nano hydrogel.

[0036] The composite membrane has a thickness of 88 μm and is composed of 12.5 g of polyoxyethylene-polycaprolactam block copolymer with a mass fraction of 4% and 0.05 g of functionalized hollow nano-hydrogel, wherein the polyoxyethylene segment accounts for the block 60% of the mass fraction of the copolymer, the polycaprolactam segment accounts for 40% of the mass fraction of the block copolymer, and the functional group selected for the functionalized hollow nano hydrogel is a sulfonate group, and its preparation method is different from that of the above-mentioned Example 1 The only difference is that in step 3, the dosage of the sulfonic acid-functionalized hollow nano-hydrogel was changed from 0.025 g to 0.05 g, and a homogeneous sulfonic acid-functionalized hollow nano-hydrogel composite membrane with a thickness of 88 μm was finally obtained. figure 2 ...

Embodiment 3

[0038] Example 3: Preparation of a composite membrane containing sulfonic acid functionalized hollow nano hydrogel.

[0039] The composite membrane has a thickness of 93 μm and is composed of 12.5 g of polyoxyethylene-polycaprolactam block copolymer with a mass fraction of 4% and 0.075 g of functionalized hollow nano-hydrogel, wherein the polyoxyethylene segment accounts for the block 60% of the mass fraction of the copolymer, the polycaprolactam segment accounts for 40% of the mass fraction of the block copolymer, and the functional group selected for the functionalized hollow nano hydrogel is a sulfonate group, and its preparation method is different from that of the above-mentioned Example 1 The only difference is that in step 3, the dosage of the sulfonic acid-functionalized hollow nano-hydrogel was changed from 0.025 g to 0.075 g, and a homogeneous sulfonic acid-functionalized hollow nano-hydrogel composite membrane with a thickness of 93 μm was finally obtained. image 3...

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Abstract

The invention discloses a composite membrane containing sulfonic acid functionalized hollow nano hydrogel, which is composed of polyoxyethylene-polycaprolactam segmented copolymer and functionalized hollow nano hydrogel, wherein the functional group of hollow nano hydrogel is sulfonate radicals. The preparation process of the composite membrane comprises the following steps: preparing the sulfonic acid functionalized hollow nano hydrogel, and preparing a polyoxyethylene-polycaprolactam segmented copolymer liquid; and adding the functionalized hollow nano hydrogel into the polyoxyethylene-polycaprolactam segmented copolymer liquid to get a membrane casting liquid for preparing the membrane. The composite membrane has the advantages of excellent membrane separation performance, simple preparation process and strong universality. When the composite membrane is used for separating a CO2 / CH4 gas mixture, the CO2 flux of the composite membrane is 2360 barrer, and CO2 / CH4 separation factor is 30; when the composite membrane is used for separating a CO2 / N2 gas mixture, the flux is 2583 barrer, and CO2 / N2 separation factor is 73.

Description

technical field [0001] The invention relates to a composite membrane containing sulfonic acid functionalized hollow nanometer hydrogel, a preparation method and application thereof, and belongs to the technical field of gas separation membranes. Background technique [0002] Carbon capture becomes a necessary and critical industrial process due to natural gas purification and global warming control. Membrane separation technology is a clean technology with high efficiency, low energy consumption, no pollution and easy operation. In order to improve the separation efficiency of membranes, the development of membrane materials with high permeability and high selectivity is a future research direction. Recent studies have found that the presence of water in the membrane can significantly improve the separation performance of the membrane. CO 2 The solubility in water is higher than that of other gases (CH 4 , N 2 etc.) by an order of magnitude, moreover, water-swellable po...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D71/80B01D67/00B01D53/22
CPCY02C20/40
Inventor 吴洪李雪琴姜忠义程友东刘雨辰张诗雨
Owner TIANJIN UNIV
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