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

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...

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