Method for improving polyurethane foam oil absorbency

Abstract

The invention discloses a method for improving the polyurethane foam oil absorbency, and belongs to the technical field of environment protection and oil absorption materials. The method is characterized in that cut polyurethane foam is added into a high-pressure reaction kettle; then, an initiating agent being 2 to 15 percent of the mass of the foam, a grafting monomer being 20 to 100 percent ofthe mass of the foam, a grafting auxiliary agent being 5 to 50 percent of the mass of the foam and a cross-linking agent being 0.05 to 2 percent of the mass of the foam are added into the reaction kettle; carbon dioxide is pumped by a supercritical fluid pump; the temperature is raised to 70 to 90 DEG C; the pressure is 5 to 12Mpa; the stirring speed is 50r / min to 200r / min; the constant temperature reaction is performed for 1 to 8h. The pressure is released for reducing the temperature; the product is taken out and is washed by ethyl alcohol and water; drying is performed at 70 DEG C; an oleophilic modified polyurethane foam material is obtained. The method has the effects and the beneficial effects that a reaction solvent of the method is poisonless and tasteless; the density and the polarity are adjustable; the separation with the product is easy; the production process achieves the green and environment-friendly effects; the grafting rate is high; the operation is convenient; the polyurethane foam is a commercial product; the production cost is lower; the oil absorption material can be repeatedly utilized through simple extrusion; the number of the cyclic adsorption times is great; higher oil absorbency is realized on the oil product.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and oil-absorbing materials, and relates to a green method for preparing oil-absorbing materials. Background technique [0002] With the rapid development of the petrochemical industry and marine economy in modern society, a large amount of industrial oily wastewater is discharged, and oil spills and oil spill accidents occur frequently, which not only cause huge economic losses, but also lead to serious environmental pollution, which seriously endangers human beings and other creatures. life and health. Rapid and efficient oil-water separation of wastewater is of great significance to environmental protection, economic development and people's life and health. [0003] Polyurethane foam (PUF) material is elastic and porous, cheap and easy to obtain, and can be produced on a large scale. It is an ideal oil-absorbing material. However, since the chemical structure of polyurethane...

AI Technical Summary

Problems solved by technology

However, the polyurethane foam material prepared by this method mainly relies on physical action to load graphene on the surface of the foam, which is easy to fall off and has a low number of cycles.

Chinese patent ZL201110415527.7 discloses that the reaction monomers are chemically grafted onto polyurethane foam through free radical reaction in toluene solution, which improves the oil absorption performance of polyurethane foam. However, the solvent toluene used in the preparation process is relatively toxic and easily causes Environmental pollution, and monomer grafting rate is low, oil absorption rate is not high

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