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PUF (polyurethane foam) adsorbing material as well as preparation method and application thereof

A technology of polyurethane foam and adsorption materials, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc.

Active Publication Date: 2017-02-15
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the published literature and patents, the electrostatic self-assembly of carboxymethyl groups on the surface of polyurethane foam β -The phenol adsorption material of cyclodextrin has not been reported yet

Method used

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  • PUF (polyurethane foam) adsorbing material as well as preparation method and application thereof
  • PUF (polyurethane foam) adsorbing material as well as preparation method and application thereof
  • PUF (polyurethane foam) adsorbing material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Example 1: Electrostatic Self-Assembled CM on PUF Surface β -The preparation method of the phenol adsorption material of cyclodextrin, concrete operation is as follows:

[0055] (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 2.8mg / g;

[0056] (2) Amino release of PUF: Add 10g of PUF cuboid with a size of about 3×3×0.2cm into the beaker, add 2 moL / L hydrochloric acid solution according to the volume-to-mass ratio of hydrochloric acid solution to PUF mL:g is 50:1 , seal the mouth of the beaker with plastic wrap, put it in a boiling water bath and boil for 4 hours, after the reaction, take out the product and wash it repeatedl...

Embodiment 2

[0061] Example 2: Electrostatic Self-Assembly CM on PUF Surface β -The preparation method of the phenol adsorption material of cyclodextrin, concrete operation is: repeat embodiment 1, adjust the concentration of hydrochloric acid solution in step (2) to be 3moL / L, boil 2h; In step (3), the concentration of hydrochloric acid solution is 2mol / L, Amination product PUF-NH 2 The mass volume ratio g:mL to the hydrochloric acid solution is 1:60; in step (4), the CM β- The concentration of CD aqueous solution is adjusted to 10g / L, the pH value is adjusted to 6.0, carboxymethyl β -Aqueous solution of cyclodextrin and diazotization product PUF-N 2 + The volume mass mL:g is 40:1, and the irradiation time at 25cm is adjusted to 20min / surface. Measured its CM β - CD fixed capacity M 52.3mg / g, water absorption W A It is 2053.6%. The phenol adsorption was measured Q It is 80.6mg / g.

Embodiment 3

[0062] Example 3: Electrostatic Self-Assembly CM on PUF Surface β -The preparation method of the phenol adsorption material of cyclodextrin, concrete operation is: repeat embodiment 1, only CM in step (4) β- CD who solution concentration is adjusted to be 20g / L, and pH value is adjusted to be 6.9, carboxymethyl β -Aqueous solution of cyclodextrin and diazotization product PUF-N 2 + The volume mass mL:g is 66:1, and the irradiation time is adjusted to 35min / surface; the water absorption rate of its PUF is measured W A 1665.1%, phenol adsorption Q is 2.8mg / g, its SEM photo is shown in figure 1 A, 1a, see ATR-FTIR spectrum image 3 (a), XPS spectrum see Figure 4 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 rate 1727.5%, phenol adsorption Q It is 3.4mg / g. Its SEM photo see figure 1 B, 1b, see ATR-FTIR spectrum image 3 (b), XPS spectrum see Figure 4 B, t...

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Abstract

The invention discloses a preparation method of a PUF (polyurethane foam) adsorbing material. According to the method, PUF is used as a base material, amino groups on the surface of the PUF are exposed firstly with a hydrochloric acid boiling method, then the amino groups are converted into diazo salt through a diazo-reaction, CMbeta-CD (carboxymethyl beta-cyclodextrin) is coupled and fixed on the surface of the PUF by the aid of electrostatic self-assembly of a CMbeta-CD aqueous solution and a nitrogen release coupling reaction under irradiation of ultraviolet light, finally, CMbeta-CD which is not assembled and coupled is removed through hot water soaking, and the PUF adsorbing material is prepared. The adsorbing material has the better hydrophilic property, the CMbeta-CD capacity and the water absorption of the adsorbing material are adjustable in a large range, and the adsorbing material has higher adsorption capacity for phenol in water; the adsorbed phenol can be desorbed with an ethanol aqueous solution, the adsorbing material is regenerated, and phenol can be recycled; the regenerated adsorbing material can adsorb phenol continuously, and the adsorbing capacity is not reduced obviously.

Description

technical field [0001] The invention relates to a surface electrostatic self-assembled carboxymethyl group 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 common highly toxic and refractory organic substances, and are important pollutants in industrial wastewater (S. R.Ha, S.Vinitnantharat, Bioregeneration by mixed microorganisms of granular activated carbon loaded with a mixture of phenols[J].Biotechnology Letters, 2000, 22(13): 1093-1096). Because of its great harm to water bodies and aquatic organisms, it has been included in the list of priority pollutants by many countries (Wu Yongmin, etc., phenolic wastewater treatment technology and development prospects, Environmental Science and Management, 2007, 32 (3): 150-154; Yin Yuling et al., Research Progress on Electro-Fenton Treatment of Refractory Wastewater, W...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C08G81/00C02F101/34
CPCC02F1/285C08G81/00B01J20/265C02F2101/345C02F2303/16
Inventor 唐辉张晓春
Owner KUNMING UNIV OF SCI & TECH
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