Composite hollow fiber film and preparation method thereof

A fiber membrane and hollow technology, which is applied in the field of composite hollow fiber membrane and its preparation, can solve the problems of complex forming process, poor tensile strength and low retention rate of composite membrane, and achieves easy control, high tensile strength and retention rate. high effect

Inactive Publication Date: 2013-07-10
HANGZHOU CREFLUX MEMBRANE TECH
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects of poor tensile strength, low rejection rate and complex composite membrane forming process in the prior art hollow fiber membrane, the present invention provides a hollow fiber membrane with high tensile strength, high rejection rate, simple process, safety, effectiveness and easy control. Composite hollow fiber membrane and preparation method thereof

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
  • Composite hollow fiber film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A composite hollow fiber membrane, comprising a polyvinylidene fluoride hollow fiber membrane base, a polyethylene glycol cross-linked layer is cross-linked on the polyvinylidene fluoride hollow fiber membrane base, and the polyethylene glycol cross-linked The layer is a spongy structure. The thickness of the polyethylene glycol cross-linked layer is 15um.

[0020] A preparation method of a composite hollow fiber membrane, such as figure 1 The shown technological process comprises the following steps:

[0021] 1) Dissolve polyethylene glycol in deionized water at 60°C, maintain the temperature and stir for 3 hours to prepare a polyethylene glycol solution with a mass percentage of 14%;

[0022] 2) Take 500 grams of polyethylene glycol solution and heat it to 80 ° C, stir and add 5 g of crosslinking agent maleic anhydride and 1.5 g of catalyst trimethylamine, continue to maintain the temperature and stir until the mixture is clear and transparent, and get Membrane sol...

Embodiment 2

[0028] A composite hollow fiber membrane, comprising a polyvinylidene fluoride hollow fiber membrane base, a polyethylene glycol cross-linked layer is cross-linked on the polyvinylidene fluoride hollow fiber membrane base, and the polyethylene glycol cross-linked The layer is a spongy structure. The thickness of the polyethylene glycol cross-linked layer is 20um.

[0029] A preparation method of a composite hollow fiber membrane, such as figure 1 Shown technological process is characterized in that: comprises the following steps:

[0030] 1) Dissolve polyethylene glycol in deionized water at 70°C, maintain the temperature and stir for 2 hours to prepare a polyethylene glycol solution with a mass percentage of 16%;

[0031] 2) Take 500 grams of polyethylene glycol solution and heat it to 70 °C, stir and add 10 g of cross-linking agent maleic anhydride and 3 g of catalyst trimethylamine, continue to maintain the temperature and stir until the mixed solution is clear and transp...

Embodiment 3

[0037] A composite hollow fiber membrane, comprising a polyvinylidene fluoride hollow fiber membrane base layer 1, a polyethylene glycol crosslinking layer 2 is cross-linked on the polyvinylidene fluoride hollow fiber membrane base layer 1, and the polyethylene glycol The alcohol cross-linked layer 2 has a sponge-like structure. The thickness of the polyethylene glycol cross-linked layer 2 is 25um.

[0038] A preparation method of a composite hollow fiber membrane, such as figure 1 The shown technological process comprises the following steps:

[0039] 1) Dissolve polyethylene glycol in deionized water at 80°C, maintain the temperature and stir for 2.5 hours to prepare a polyethylene glycol solution with a mass percentage of 18%;

[0040] 2) Take 500 grams of polyethylene glycol solution and heat it to 85°C, stir and add 15g of cross-linking agent maleic anhydride and 6g of catalyst trimethylamine, continue to maintain the temperature and stir until the mixed solution is cle...

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

No PUM Login to view more

Abstract

The invention relates to the technical field of composite materials and in particular relates to a composite hollow fiber film and a preparation method thereof. The composite hollow fiber film comprises a polyvinylidene fluoride hollow fiber film base layer, wherein a polyethylene glycol cross-linking layer is cross-linked on the polyvinylidene fluoride hollow fiber film base layer; and the polyethylene glycol cross-linking layer has a sponge-shaped structure. The preparation method is characterized by comprising the following steps: preparing a polyethylene glycol solution, cross-linking the polyethylene glycol, adding a surfactant, filtering and defoaming to prepare a casting film solution and forming a composite film. According to the composite hollow fiber film, a dense cross-linking layer is cross-linked on the hollow fiber film base layer, and the composite hollow fiber film has the advantages of high tensile strength and high reject rate; and the preparation method has the advantages of simple process, high safety, high effectiveness and easiness in control.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a composite hollow fiber membrane and a preparation method thereof. Background technique [0002] Traditional sewage regeneration treatment technology has disadvantages such as low water quality, large land occupation, and poor stability. Membrane separation technology has the advantages of low energy consumption, simple process, high separation efficiency, and no environmental pollution. It is an important high-tech solution to contemporary energy, resource and environmental problems. It cannot be replaced by any other chemical separation technology. Its application has been It has been involved in chemical, food, pharmaceutical, biochemical, environmental protection and other fields, and has made important contributions to energy conservation, efficiency improvement, and environmental purification. [0003] However, the existing hollow fiber membranes generally ha...

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
Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/38B01D69/12B01D67/00
Inventor 郑子龙包进锋张星星
Owner HANGZHOU CREFLUX MEMBRANE TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap