Polyethyleneimine functionalized carbon nanotube modified polyformaldehyde composite material and preparation method thereof

A technology of carbon nanotube modification and polyethyleneimine, which is applied in the field of materials, can solve the problems of weak bonding force between carbon nanotubes and polymer matrix interfaces, achieve the effect of improving crystallization behavior and mechanical properties, and improving thermal stability
CN110527243AActive Publication Date: 2019-12-03HENAN UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HENAN UNIVERSITY
Publication Date
2019-12-03

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Abstract

The invention provides a preparation method of a polyethyleneimine functionalized carbon nanotube modified polyformaldehyde composite material. The preparation method comprises the following steps: A)mixing carbon nanotube with an acid to obtain carboxylated carbon nanotube; b) mixing and reacting the carboxylated carbon nanotube and polyethyleneimine in the presence of a condensing agent to obtain a polyethyleneimine functionalized carbon nanotube product; and C) reacting polyformaldehyde with the polyethyleneimine functionalized carbon nanotube product, and molding to obtain the product. According to the method disclosed by the invention, the polyethyleneimine functionalized carbon nanotubes can be uniformly dispersed in the polyformaldehyde matrix, and the interface bonding force between the carbon nanotubes and the polyformaldehyde is improved; therefore, the thermal stability of the polyformaldehyde composite material is improved, the crystallization behavior and the mechanical property are improved, and the polyformaldehyde composite material can be widely applied to the fields of automobiles, electronic appliances, machinery, precise instruments, building materials and thelike.
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Description

technical field

[0001] The invention relates to the field of material technology, in particular to a polyethyleneimine functionalized carbon nanotube modified polyoxymethylene composite material and a preparation method thereof. Background technique

[0002] Polyoxymethylene is a highly crystalline thermoplastic engineering plastic with excellent chemical properties, mechanical properties, corrosion resistance, creep resistance and self-lubricating properties. It is widely used in automobiles, mechanical equipment, electronic appliances and other fields. However, the polyoxymethylene molecular chain is arranged alternately by carbon-oxygen bonds (C-O), and two adjacent oxygen atoms have a strong activation effect on the methylene hydrogen atom, which makes the polyoxymethylene tend to depolymerize during processing, especially in the Under the action of heat and oxygen, free radicals are easily generated, and continuous degradation reactions occur. In addition, the regular ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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