Polyurethane foam surface-coupled β-cyclodextrin adsorption material and its preparation method and application

A technology of polyurethane foam and adsorption material, applied in the field of adsorption and separation, can solve the problems of high device price, non-reusability and high cost

Active Publication Date: 2018-10-02
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method has a large processing capacity, the equipment is expensive, and the use of benzene and other substances will cause secondary pollution to the environment, and the processing process is cumbersome.
CN104724783A discloses a method for extracting phenolic wastewater by using the dephenolic extractant methyl n-butyl ketone to obtain the extract phase and the raffinate phase. This method can effectively remove high-concentration phenolic wastewater, but requires a specific extractant. But there are disadvantages such as high cost and can not be reused
In the published literature and patents, on polyurethane foam surface coupling β -The phenol adsorption material of cyclodextrin has not been reported yet

Method used

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  • Polyurethane foam surface-coupled β-cyclodextrin adsorption material and its preparation method and application
  • Polyurethane foam surface-coupled β-cyclodextrin adsorption material and its preparation method and application
  • Polyurethane foam surface-coupled β-cyclodextrin adsorption material and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0049] Embodiment 1: Polyurethane foam surface coupling β -The preparation method of the adsorption material of cyclodextrin, concrete operation is as follows:

[0050] (1) Pretreatment of PUF: Cut the commercially available polyether PUF into a cuboid of 3×6×10cm, wash it with distilled water at 60°C for several times until the washing water is neutral, then dry it under vacuum at 60°C for 24 hours, and use fresh-keeping The film is tightly wrapped and placed in a desiccator for standby; the water absorption rate is measured W A 1665.1%, phenol adsorption Q 1 2.8mg / g;

[0051] (2) Amino release of PUF: Add 10 g of PUF cuboids with a size of about 3 × 3 × 0.2 cm in a beaker, and add the concentration of 2 moL / L of hydrochloric acid solution, seal the mouth of the beaker with plastic wrap, boil it in a boiling water bath for 1 hour, take out the product after the reaction and wash it repeatedly with distilled water until the washing liquid is neutral, flatten the product ...

Embodiment 2

[0057] Embodiment 2: Polyurethane foam surface coupling β -The preparation method of the adsorption material of cyclodextrin, the specific operation is: with the method of embodiment 1, only the volume mass ratio mL:g of hydrochloric acid solution and PUF in step (2) is adjusted to 30:1, and the concentration of hydrochloric acid solution is adjusted to 3 moL / L, the boiling time was adjusted to 3h, and the amination product PUF-NH 2 Amino content Am 0.4307mmol / g, water absorption W A 1698.2%, phenol adsorption Q 1 is 3.2mg / g; the step (3) β -The concentration of the CD aqueous solution was adjusted to 20g / L, and the addition amount was 27mL; 2mL of formaldehyde with a concentration of 37% by mass was added, and the reflux reaction time was adjusted to 5h; the PUF-NH 2 - β -CD product β - CD fixed capacity N 1 376.4mg / g, water absorption W A 2800.1%, phenol adsorption Q 1 It was 78.9 mg / g.

Embodiment 3

[0058] Embodiment 3: Polyurethane foam surface coupling β - Phenol adsorption material of cyclodextrin and its preparation method, the specific operation is: repeat Example 1, only adjust the volume-to-mass ratio of hydrochloric acid solution to PUF in step (2) to 50:1 (mL / g), boil time Adjusted to 4h; step (3) β -The concentration of the CD aqueous solution was adjusted to 30g / L, 3mL of formaldehyde with a concentration of 37% by mass was added, and the reflux reaction time was adjusted to 7h; the water absorption rate of PUF was measured W A 1665.1%, phenol adsorption Q 1 is 2.8mg / g, its SEM photo is shown in figure 1 A, ATR-FTIR spectrum see figure 2 In (a), XPS spectrum see image 3 A, the surface C content is 62.33%, the O content is 37.67%, and N is not detected. Measured its PUF-NH 2 Amino content Am 0.7870mmol / g, water absorption W A 1727.5%, phenol adsorption Q 1 is 3.4mg / g, its SEM photo is shown in figure 1 B, ATR-FTIR spectrum see figure 2 (b) i...

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Abstract

The invention discloses an adsorbing material with beta-CD (Cyclodextrin) coupled on surface of PUF (Polyurethane Foam) and a preparation method and application thereof. The method is characterized by taking the PUF as a base material, exposing amino groups on the surface of the PUF by using a hydrochloric acid boiling method, coupling beta-CD molecules to the surface of the PUF by carrying out heating reflux reaction in a beta-CD water solution through a molecular coupling technology of an aldehyde compound, and carrying out heat soaking, thus obtaining the adsorbing material with the beta-CD coupled on the surface of the PUF. The adsorbing material disclosed by the invention has better hydrophily, and the water absorption rate can excess 2000 percent; the beta-CD solid carrier amount and the water absorption rate of the adsorbing material can be regulated in a large range, the adsorbing material has stronger adsorption ability on phenol in water, the adsorbed phenol can be parsed and regenerated by using an ethanol solution, the regenerated adsorbing material can be continuously used for phenol adsorption, and the adsorption ability is not obviously reduced after three times of adsorption-parse circulation.

Description

technical field [0001] The invention relates to a coupling on the surface of polyurethane foam β The cyclodextrin adsorption material and its preparation method and application belong to the field of adsorption separation. Background technique [0002] Phenol and its derivatives are an important chemical raw material, highly toxic and refractory, and have become common and important pollutants in industrial wastewater (S. R.Ha, S. Vinitnantharat, Bioregeneration by mixed Microorganisms of granular activated carbon loaded with a mixture ofphenols[J]. Biotechnology Letters, 2000, 22(13): 1093-1096). Phenolic substances are highly toxic and carcinogenic aromatic compounds, which are toxic to all living organisms. They have been listed as one of the 129 priority pollutants by the U.S. Environmental Protection Agency, and they are also one of the priority pollutants in my country. Direct irrigation of farmland with untreated phenol-containing wastewater (50-100mg / L) will cause ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/30B01J20/26B01J20/34C02F1/28C08G81/00C08J9/42C08L75/04C08L5/16C02F101/34
CPCB01J20/22B01J20/262B01J20/3425C02F1/285C02F2101/345C02F2303/16C08G81/00C08J9/42C08J2375/04C08J2405/16
Inventor 唐辉张晓春
Owner KUNMING UNIV OF SCI & TECH
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