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Method and device for preparing modified sponge with high amino content, and algae removal application

A technology of modified sponge and high amine group, applied in chemical instruments and methods, alkali metal oxides/hydroxides, special treatment targets, etc., to achieve the effects of low modification cost, easy regeneration and easy recovery

Pending Publication Date: 2021-10-01
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no such algae-removing adsorbent

Method used

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  • Method and device for preparing modified sponge with high amino content, and algae removal application
  • Method and device for preparing modified sponge with high amino content, and algae removal application
  • Method and device for preparing modified sponge with high amino content, and algae removal application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] The preparation method of the aminated low-density modified sponge specifically comprises the following preparation steps:

[0069] (1) Feeding in the wet extrusion device

[0070] The polyethyleneimine (ethanol: water = 1) solution with a molecular weight of 20000 is the raw material A reaction solution, the weight concentration is 0.1g / mL, and the concentration of imine chains is 2.33mmol / mL. The ethanol solution of 1,4-butanediol diglycidyl ether is the raw material B reaction solution, the weight concentration is 0.157g / mL, and the epoxy concentration is 1.16mmol / mL based on the epoxy number of 0.74. The number of imine chains / epoxy number is 10:1, take corresponding volumes of A reaction solution and B reaction solution, mix and stir evenly under ice-salt bath cooling. A pre-cooled PU sponge with a size of 2 x 2 x 2 cm and a density of 22 mg / mL was put into the wetting squeeze device from the sponge inlet. The reaction mixture is added to the wetting device from ...

Embodiment 2

[0081] The difference between this example and Example 1 is that the size of the sponge is 10×10×2 cm, the density is 22 mg / mL, the extrusion rate of the sponge is 87.5%, the cross-linking time is 120 min, and the washing extrusion rate is 25%.

Embodiment 3

[0083] The difference between this example and Example 1 is that the size of the sponge is 2×2×2 cm, the density is 60 mg / mL, the extrusion rate of the sponge is 65%, the crosslinking time is 110 min; the washing extrusion rate is 50%.

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Abstract

The invention belongs to the technical field of polymer adsorption materials, and particularly discloses a method and a device for preparing modified sponge with high amino content, and algae removal application. A uniform reaction liquid thin layer is formed on the surface of the sponge, and polyethyleneimine and an epoxy cross-linking agent in the thin layer are cross-linked under a mild condition, so that a layer of stable and uniform polyethyleneimine-epoxy cross-linking agent is formed on the surface of the sponge. The modified sponge is high in amino content, environment-friendly and low in sponge modification cost, and due to the special structure of the sponge, the modified sponge has a good prospect in the application field. The algae removal speed is high, the algae removal effect is good, and recycling and regeneration are easy.

Description

technical field [0001] The invention belongs to the technical field of polymer adsorption materials, and in particular relates to a method and device for preparing a modified sponge with high amino group content and the application of algae removal. Background technique [0002] Polymer artificial sponge is a class of three-dimensional elastic materials with high porosity, low density and large specific surface area. Compared with traditional adsorbents, artificial sponges have outstanding advantages in both adsorption and liquid absorption. [0003] There are two ways to manufacture sponges for the purpose of adsorption and liquid absorption: one is to modify the existing sponge as a carrier; the other is to directly manufacture new sponges. The direct freeze-drying method and the crushed ice crushed to a certain size as a template method, both of which require freeze-drying, are extremely expensive. These two methods and the preparation of porous materials using salt cru...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28
CPCB01J20/267B01J20/28045C02F1/285C02F2303/20
Inventor 叶林顺刘洁生杨维东欧浩楠黄隽萍梁泽雄王雅妮
Owner JINAN UNIVERSITY
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