Modified fly ash for plastic filling and reinforcement and preparation method thereof

Abstract

The invention discloses modified fly ash for plastic filling reinforcement and a preparation method of the modified fly ash. The modified fly ash comprises the following raw materials by weight: 100 parts of fly ash, 5 to 30 parts of a thermosetting resin solution, and 5 to 20 parts of an interface reinforcing agent emulsion. The preparation method comprises the following steps: modifying the fly ash according to a twice coating modification method, that is, coating the surface of the fly ash with the thermosetting resin solution, and then coating the surface of the fly ash coated with the thermosetting resin solution with the interface reinforcing agent emulsion, so as to obtain the modified fly ash. The modified fly ash has the advantages that the surface of the fly ash is modified uniformly; an interface layer of high mutual acting force is formed between fly ash and a plastic base body, so that the bonding is firmer, the interface acting force transmission is uniform, the filling quantity in a plastic product can be increased, and even the mechanical property of the plastic product can be improved; moreover, as neither expensive coupling agent nor strong acid / strong alkali of extremely high corrosivity is adopted, the cost is low, and the operation is safe; a sealed pipeline is adopted for raw material conveying, so that the work environment is improved, and environmental pollution is reduced.

Description

technical field [0001] The invention relates to a modified fly ash and a preparation method thereof, in particular to a modified fly ash for plastic filling and reinforcement and a preparation method thereof. Background technique [0002] For a long period of time in the future, my country's energy supply and consumption pattern will still be dominated by coal. However, with the consumption of coal, a large amount of fly ash waste is produced. At present, the comprehensive utilization of fly ash in my country is still at a relatively low level, mainly concentrated in building materials, road construction, backfill, agriculture and chemical industry. Although these methods can solve the utilization of most of the fly ash, but the added value is low, and there is still a certain degree of secondary pollution. With the development of technology, fly ash is also gradually used in the field of polymer material filling. However, due to the high density of fly ash, many hydroxyl ...

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Problems solved by technology

[0004] Since the main components of fly ash include silicon dioxide, ferric oxide, aluminum oxide, etc., it is more effective to use coupling agent to modify the silicon dioxide, but the effect on metal oxide treatment is not obvious.

In addition, the existing technology uses a single modifier for surface modification, and it is difficult to select a modifier that is firmly bonded to both the fly ash and the plastic matrix, that is, the modifier formed between the fly ash and the plastic matrix. It is a weak boundary layer, and the reinforcement effect is not obvious

Therefore existing open technology has following defect: adopt coupling agent to process cost height, pretreatment process is complicated, time is long, efficiency is low; It is extremely harmful to human health; the fly ash is modified unevenly, and the physical properties of the material are not improved significantly, and the material cost is reduced at the expense of the mechanical properties of the material.

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