Preparation method and application of hydrophobic carbon nanotube composite polyvinylidene fluoride photo-thermal hydrophobic membrane

By combining carbon nanotubes with polyvinylidene fluoride and preparing the film through electrospinning process, the problem of poor comprehensive performance of existing photothermal hydrophobic membranes is solved, and a high-throughput, high liquid entry pressure and durability hydrophobic membrane is achieved, which improves the water production efficiency of the photothermal film distillation system.

CN119701685AActive Publication Date: 2025-03-28SHANGHAI SECOND POLYTECHNIC UNIVERSITY
3 Cites 1 Cited by

Patent Information

Application Number
CN202510180642.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-19
Publication Date
2025-03-28
Estimated Expiration
2045-02-19

AI Technical Summary

Technical Problem

The existing photothermal hydrophobic membranes have poor comprehensive performance during high-salt wastewater treatment and seawater desalination, making it difficult to achieve high throughput, high liquid entry pressure and durability.

Method used

The hydrophobic carbon nanotube composite polyvinylidene fluoride photothermal hydrophobic film is prepared by combining carbon nanotubes with polyvinylidene fluoride and electrospinning process to enhance the hydrophobicity and photothermal utilization of the film.

Benefits of technology

The hydrophobic angle of the membrane, liquid entry pressure and permeability flux are improved, the water production efficiency of the photothermal film distillation system is enhanced, and efficient high-salt wastewater treatment and seawater desalination are achieved.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention relates to the technical field of membrane distillation, in particular to a preparation method of a hydrophobic carbon nanotube composite polyvinylidene fluoride photo-thermal hydrophobic membrane, which comprises the following steps: S1, mixing water, ethanol and 1H, 1H, 2H, 2H-perfluorodecyl triethoxy silane to obtain a hydrophobic modifier; s2, mixing carbon nanotubes, ammonia water and a hydrophobic modifier to obtain a black suspension; s3, centrifuging, washing and drying the black suspension solution to obtain hydrophobic carbon nanotube powder; s4, acetone and N, N-dimethylformamide are mixed, polyvinylidene fluoride and the hydrophobic carbon nanotube powder are added, and a spinning solution is obtained; and S5, performing electrostatic spinning on the spinning solution to form a film, and drying to obtain the hydrophobic carbon nanotube composite polyvinylidene fluoride photo-thermal hydrophobic film. The modified carbon nanotubes can be used as photo-thermal particles to increase the photo-thermal utilization rate of the hydrophobic membrane, polyvinylidene fluoride is used as a main body structure of the hydrophobic membrane to provide mechanical strength and certain hydrophobicity, the photo-thermal utilization rate is coordinated in solar membrane distillation application, and the comprehensive performance is improved.
Need to check novelty before this filing date? Find Prior Art