Method for preparing sodium polystyrenesulfonate/multi-wall carbon nanotube composition

Abstract

The invention discloses a method for preparing a sodium polystyrenesulfonate / multi-wall carbon nanotube (PSS / MWNTs) composition. The method comprises the following steps: putting 50mg of multi-wall carbon nanotubes into 60mL of deionized water, performing ultrasonic dispersion, adding 5g of sodium p-styrenesulfonate, stirring for 8 hours at normal temperature, adding 50mg of potassium peroxodisulfate, stirring for 48 hours at 65 DEG C in the presence of argon, and after the stirring is completed, performing centrifugation treatment to remove irregular carbon and a catalyst; and filtering supernate by using a filtering membrane of 0.2mu m, removing ungrafted sodium polystyrenesulfonate (PSS), and performing freeze-drying on the obtained solid, thereby obtaining the PSS / MWNTs composition. According to the method, the surfaces of MWNTs are coated by PSS in a covalence manner through in-situ polymerization, a great amount of negative charges are introduced to the surfaces of the nanotubes,a spatial expelling function is achieved, stable dispersion of the nanotubes in high-concentration saline water and API (American Petroleum Association) saline water is achieved. By adopting the method, a base is made for application of the multi-wall carbon nanotubes in the petroleum industry.

Description

technical field [0001] The invention belongs to the technical field of material chemistry, and in particular relates to a sodium polystyrene sulfonate / multi-wall carbon nanotube compound and a preparation method thereof. Background technique [0002] At present, the research on the application of nanomaterials in oil and gas field development has attracted much attention. Multi-walled carbon nanotubes, as one-dimensional nanomaterials, are used in different fields such as nano-sealing and nano-flooding. Carbon atoms in carbon nanotubes are represented by sp 2 Hybridization is dominant, while the hexagonal grid structure has a certain degree of bending, forming a spatial topology, in which a certain sp 3 Hybrid bond, that is, the chemical bond formed also has sp 2 and sp 3 mixed hybrid state. When the multi-walled tube begins to form, the layers between the layers are easy to become trap centers to capture various defects, so the tube wall of the multi-walled tube is usu...

AI Technical Summary

Problems solved by technology

The presence of a small amount of electrolyte will lead to flocculation and sedimentation of nanomaterials, which cannot play the role of nanomaterials

Severely limits the use of nanomaterials in oil and gas field extraction

Nanomaterials cannot be applied in the real sense in oil and gas field exploitation

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