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Preparation method of CNT (carbon nanotube) microspheres

A technology of carbon nanotube microspheres and carbon nanotubes, which is applied in the field of preparation of carbon nanotube microspheres, can solve problems such as the dispersion of carbon nanotubes that have not yet been seen, and achieve easy scale-up production, simple equipment and technology, and environmental protection Effect

Active Publication Date: 2015-11-18
HOHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, there have been many reports at home and abroad on the use of carbon nanotubes to improve the performance of polymer composites. The use of carbon nanotubes to enhance polymer composites can improve the mechanical, thermal, and electrical properties of composite materials, but no resin polymerization has been seen. A report on the preparation of microspheres coated with carbon nanotubes to improve the dispersion of carbon nanotubes

Method used

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  • Preparation method of CNT (carbon nanotube) microspheres
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  • Preparation method of CNT (carbon nanotube) microspheres

Examples

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Embodiment 1

[0030] A preparation method of carbon nanotube microspheres, the specific steps are as follows:

[0031] (1) Preparation of epoxy resin mixed solution: solid glycidyl ether epoxy resin is dissolved in acetone solvent, stirred to make it dissolve evenly, obtain the epoxy resin solution of 0.01g / ml; by weight of epoxy resin, Add 0.01wt% carboxylated carbon nanotubes and 0.01wt% polyethylene glycol octylphenyl ether (tritonX-100) surfactant into the epoxy resin solution, stir for 1min, and ultrasonically disperse for 30min to obtain epoxy resin mixture;

[0032] (2) Preparation of microsphere forming liquid: on the basis of epoxy resin mass, 2wt% polyvinylpyrrolidone was dissolved in deionized water to obtain a microsphere forming liquid of 0.002g / ml, and an electric or magnetic stirrer was used to stir it, Stirring speed is 700rpm;

[0033](3) Preparation of carbon nanotube microspheres: the epoxy resin mixed solution of step (1) is ultrasonically dripped into the microsphere ...

Embodiment 2

[0035] A preparation method of carbon nanotube microspheres, which is different from Example 1 in that the resin solution is 0.5g / ml in step (1); the amount of carbon nanotubes is 1wt% (by weight of the resin), and the surface Active agent is 10wt% (by weight of resin), stirred for 2min, and ultrasonically dispersed for 60min; in step (2), 10wt% (by weight of resin) polyvinylpyrrolidone dispersant, and the concentration of microsphere forming liquid is 0.002g / ml , the stirring speed is 3000rpm; in the step (3), the dropping speed is 1.0ml / min, and the stirring speed is 3000rpm, and the stirring is continued for 120min after the solution is all dripped.

Embodiment 3

[0037] (1) Preparation of phenolic resin mixed solution: dissolve solid phenolic resin in acetone solvent, stir to make it dissolve evenly, obtain 0.01g / ml phenolic resin solution; Add nanotubes, 1.0wt% polyoxyethylene sorbitan monolaurate to the phenolic resin solution, stir for 1 min, and ultrasonically disperse for 45 min to obtain a phenolic resin mixed solution;

[0038] (2) Preparation of microsphere forming liquid: 2.0wt% polyvinylpyrrolidone was dissolved in deionized water based on the mass of phenolic resin to obtain a microsphere forming liquid of 0.002g / ml, and an electric or magnetic stirrer was used to stir it, Stirring speed is 900rpm;

[0039] (3) Preparation of carbon nanotube microspheres: the phenolic resin mixed solution of step (1) is ultrasonically dripped into the microsphere forming liquid of step (2), at a rate of 10ml / min, and stirred at 900rpm for 60min with a stirring speed The formed microspheres are filtered out, washed repeatedly with deionized ...

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Abstract

The invention discloses a preparation method of CNT (carbon nanotube) microspheres. Water-insoluble resin is completely dissolved in an organic solvent, then CNTs and a surfactant are added, and a CNT-containing resin mixed solution is obtained through mixing and ultrasonic and even dispersion; the solution is slowly dropped into a container containing a microsphere forming liquid, the CNT-containing resin solution aggregates to form sphere-like bodies for precipitation in an aqueous solution under the surface tension action, CNT-containing microspheres are obtained, taken out and washed repeatedly, and the microspheres with the CNTs and resin polymer molecules penetrating through each other are obtained after drying at the room temperature. The CNT microspheres can be applied to fiber reinforced composite materials, self-healing composite materials, semiconductor device packaging materials and the like, and the dispersity of the CNTs in the composite materials is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of polymer microspheres for composite materials, and in particular relates to a preparation method of carbon nanotube microspheres. Background technique [0002] Carbon nanotubes (CNTs) are typical one-dimensional nanomaterials with a large aspect ratio, and have excellent mechanical, electrical, and thermal properties. Carbon nanotube-reinforced polymer matrix composites have become a research hotspot. However, due to the large specific surface area and strong specific surface energy of CNTs, it is easy to agglomerate. At the same time, the resin itself has a certain viscosity, which makes it easy to accumulate carbon nanotubes. It is difficult to achieve a composite system with uniform dispersion of carbon nanotubes in polymer reinforcement modification, and even Due to the agglomeration, not only the expected effect cannot be achieved, but the inherent performance of the polymer composite material is red...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02
Inventor 曾少华申明霞段鹏鹏汪米琪陆凤玲王珠银
Owner HOHAI UNIV
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