Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Novel preparation method of high-performance composite film

A composite membrane, high-performance technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of reduced mechanical properties of membrane materials, a large amount of organic solvents, and difficulty in scraping and coating to form molds. Simple equipment and convenient operation

Inactive Publication Date: 2016-01-13
TIANJIN POLYTECHNIC UNIV
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method controls the pore structure of the membrane, the operation is complicated and requires a large amount of organic solvent
For most membrane materials, increasing the concentration of the casting solution is the main method to reduce the pore size, but when the concentration of the casting solution is too high, its fluidity is too poor to be scraped into a mold
As the pore size increases, the mechanical properties of the membrane material will inevitably decrease, and its durability will also be affected.

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Novel preparation method of high-performance composite film
  • Novel preparation method of high-performance composite film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Add 3g of fully dried polyvinylidene fluoride to 92g of dimethylacetamide, stir and dissolve at 50°C for 2 hours, add 5g of anhydrous lithium chloride after the polymer is completely dissolved, and continue stirring until completely Dissolve to obtain a homogeneous solution, let it stand for degassing for 30 minutes, and set aside;

[0022] (2) The solution after the defoaming obtained in step (1) is placed in a constant pressure propeller, and the propulsion speed is set as 100mL / h, and the method of solution injection is adopted, and the spray distance is adjusted to be 5cm, and the rotating speed of the roll is 10r / min , The feed temperature is 25°C, the atomization pressure is 1.5MPa, and the air flow rate is 160mL / h, the casting solution is sprayed on the polyester nonwoven fabric fixed on the surface of the roller, and the roller is rotated while the solution is sprayed. The lower half was submerged in tap water in a coagulation bath for 10 hours, then transfe...

Embodiment 2

[0025] (1) Add 10g of fully dried polyvinylidene fluoride to 85g of dimethylacetamide, stir and dissolve at 80°C for 3 hours, add 5g of anhydrous lithium chloride after the polymer is completely dissolved, and continue stirring until completely Dissolve to obtain a homogeneous solution, let stand for degassing for 5 hours, and set aside;

[0026] (2) The solution after the defoaming obtained in step (1) is placed in a constant pressure propeller, and the propulsion speed is set to 400mL / h, and the solution is sprayed, and the spray distance is adjusted to be 10cm, and the rotating speed of the roll is 15r / min , The feed temperature is 50°C, the atomization pressure is 2.5MPa, the air flow rate is 200mL / h, the casting solution is sprayed on the polypropylene nonwoven fabric fixed on the surface of the roller, and the roller is rotated while the solution is sprayed. Submerge the lower part in the tap water of the coagulation bath. After the spraying is completed, take off the no...

Embodiment 3

[0029] (1) Add 10g of bisphenol A polysulfone to 85g of nitrogen methylpyrrolidone, stir and dissolve at 80°C for 3 hours, add 5g of calcium chloride after the polymer is completely dissolved, and continue to stir until it is completely dissolved to obtain homogeneous phase solution, defoamed in a vacuum oven for 1h, and set aside;

[0030] (2) The solution after the defoaming obtained in step (1) is placed in a constant pressure propeller, and the propulsion speed is set as 300mL / h, and the method of solution injection is adopted, and the spraying distance is adjusted to be 15cm, and the rotating speed of the rotating roller is 30r / min , The feed temperature is 50°C, the atomization pressure is 1.5MPa, the air flow rate is 140mL / h, the casting solution is sprayed on the polyester nonwoven fabric fixed on the surface of the roller, and the roller is rotated while the solution is sprayed. Immerse the lower half in the coagulation bath absolute ethanol. After the spraying is com...

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
Login to View More

PUM

PropertyMeasurementUnit
Tensile strengthaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Aperture sizeaaaaaaaaaa
Login to View More

Abstract

The present invention provides a novel preparation method of a high-performance and high-strength composite film. The preparation method comprises: a) dissolving an organic polymer film preparing material in an organic solvent to obtain a homogeneous solution, adding a certain amount of an additive, uniformly mixing, and carrying out standing deaeration to obtain a film casting solution; and 2) placing the film casting solution in a constant pressure propeller, and spraying the film casting solution on a nonwoven fabric fixed on the surface of a rotation roller in a spray-coating manner by using a solution injection method while rotating the rotation roller, wherein the lower half portion of the rotation roller is immersed in the coagulation bath, and the constant pressure propeller speed, the injection distance, the rotation roller speed, the material feeding temperature, the atomizing pressure, and the air flow rate parameter are controlled to control the pore size and the distribution of the film so as to obtain the high-performance and high-strength fiber composite film. According to the present invention, the method has characteristics of simple preparation process, easy operation, low equipment requirements, energy saving and low cost, and is suitable for large-scale production.

Description

technical field [0001] The invention relates to a preparation method of a high-performance, high-strength composite membrane, in particular to a high-strength composite fiber membrane with an adjustable pore diameter and a sponge-like structure obtained by a solution spraying method. Background technique [0002] Membrane separation technology, as a new type of efficient fluid separation unit operation technology, has the functions of separation, concentration, purification and refining, as well as high efficiency, energy saving, environmental protection, molecular level filtration and simple filtration process, easy to control, etc. In recent years, It has achieved remarkable rapid development, and it is widely used in industrial fields such as the manufacture of sterile water, high-purity water or beverages, and air purification. Moreover, in recent years, it has also been widely used in the fields of domestic wastewater and industrial wastewater. At present, the membrane...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01D71/12B01D69/12B01D67/00
Inventor 李伟袁晓雨黄睿张兴祥
Owner TIANJIN POLYTECHNIC UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com