Preparation method of CNTs (Carbon Nanotubes) modified PAN (Polyacrylonitrile) phase change material microcapsule composite thin film

Abstract

The invention discloses a preparation method of a CNTs (Carbon Nanotubes) modified PAN (Polyacrylonitrile) phase change material microcapsule composite thin film. The preparation method is carried out in sequence according to the following steps: firstly, grinding enough PAN powder and drying at constant temperature; secondly, pouring 1-methyl-2-pyrrolidinone and an n-nonadecane phase change microcapsule into a beaker and carrying out ultrasonic dispersion; then adding carboxylated CNTs and carrying out the ultrasonic dispersion; thirdly, raising the temperature of a water-bath pot and adding polyvinylpyrrolidone and the PAN; fourthly, stirring; fifthly, standing and de-foaming; sixthly, carrying out film preparation. According to the preparation method disclosed by the invention, a proper amount of the carboxylated CNTs are added; compared with the utilization of other types of the CNTs or the CNTs with other content, the carboxylated CNTs can realize maximization of the enthalpy efficiency or porosity of the thin film and a corresponding thin film material with the optimal performance is obtained. The carboxylated CNTs are added so that the water flux and porosity of the prepared thin film material are improved and the prepared thin film has good specific surface area, pore volume and pore diameter.

Description

technical field [0001] The invention relates to the technical field of phase change material microcapsules, in particular to a composite film of phase change material microcapsules. Background technique [0002] With the continuous growth of economic development and population size, the problem of energy shortage has become increasingly prominent. Although people are paying more and more attention to the problem of energy shortage, and the awareness of energy conservation is also increasing, scientific research scholars have been devoting themselves to the research and development of new energy-saving technologies, but generally the cost is relatively high, the operation is difficult, and the energy-saving effect is limited. Facing the serious problem of energy scarcity, the key is to develop efficient, low-cost, simple and easy energy storage technology. [0003] As early as the early 20th century, some researchers began to study energy storage technology, hoping to solve ...

AI Technical Summary

Problems solved by technology

Although people are paying more and more attention to the problem of energy shortage, and the awareness of energy conservation is also continuously strengthened, scientific research scholars have been committed to research and development of new energy-saving technologies, but the general cost is relatively high, the operation is difficult, and the energy-saving effect is limited.

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