A polymer skeleton material capable of absorbing formaldehyde in the air and its preparation method

Abstract

The invention relates to a preparation method of a hydrophilized macromolecular framework material and application of the hydrophilized macromolecular framework material in removing formaldehyde pollution in air. The existing three-dimensional structural melamine resin is used as a basis, a copolymer of water-soluble N,N-dimethyl acrylamide and glycidyl methacrylate is used as a hydrophilic polymer, and polyethyleneimine is used as a curing agent; then a framework is covered by a cured polymer coating layer, so that the hydrophilicity of the material is greatly improved, and therefore, a large quantity of small water drops can be adsorbed on the surface of the framework; when air flow passes through pores of the material, formaldehyde in the air can be transferred into the small water drops by a dissolving mode, and thus purification of formaldehyde in the air can be realized; an experiment shows that the wet purification mode has the advantages that the device is simple in structure, the material can be used cyclically for multiple times, is low in cost, low in energy consumption, high in applicability and harmless to the environment and people, and secondary pollution is avoided.

Description

technical field [0001] The invention relates to the preparation of a polymer skeleton material and its application in eliminating formaldehyde pollution in the air. The use of the polymer framework material can provide a new method for removing formaldehyde pollution in the air which is convenient, fast and extremely effective. Background technique [0002] Formaldehyde is a representative compound of volatile organic pollutants. Long-term exposure can cause various diseases such as skin cancer. It has always been a major concern in the control of indoor environmental pollution. How to remove formaldehyde pollution in the indoor environment has become a problem that must be overcome. technical challenge. At present, there are two basic methods to solve the problem: one is the activated carbon adsorption method, and the other is the catalytic degradation method. The former method is relatively simple, but the effect is very limited, because the adsorption capacity of activa...

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Problems solved by technology

Take Ti0 2 As an example of photocatalytic organic matter degradation technology, although its advantages such as mild reaction conditions, low energy consumption, and non-selectivity have once attracted much attention in the field of air purification, in-depth research in practical applications has shown that photocatalysis must meet the requirements The condition is that the three elements of ultraviolet light, catalyst and carrier work together. The problems to be solved are even more complicated than the research on photocatalyst itself, and the technical barriers far exceed the height that a purely applied technology can bear. Therefore, the development prospect is not optimistic

[0003] In order to quickly and effectively degrade organic molecules, a new method has emerged, which generates so-called net ions with high oxidation activity (such as hydroxyl radicals and peroxide radicals) through electrical excitation to instantly oxidize formaldehyde molecules. From the perspective of degradation, the efficiency can indeed be improved, but new problems will arise. These highly reactive substances themselves will cause harm to the human body. The harm caused by the human body in an oxidizing air atmosphere may not be greater than that of formaldehyde itself. Small

On the other hand, the degradation of organic molecules is not a one-step process, but will produce various intermediate molecular fragments. The potential harm of these things to the human body is completely unknown now. People often only emphasize the removal of formaldehyde, without considering the resulting The side effects brought about by the above analysis show that the degradation method is by no means perfect, not only the cost is high, but also the risk is high, so it should be avoided as much as possible.

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