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

Method of preparing line type polyolefin cellular material

A linear polyolefin and porous material technology, applied in the field of linear olefin polymer porous materials, can solve the problems of difficulty in obtaining bulk porous polymer materials and narrow technical application areas, achieving unlimited shape, simple preparation and molding technology, Versatile effect

Inactive Publication Date: 2007-09-12
NINGBO UNIV
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the free radical polymerization that can prepare porous materials is mainly suspension polymerization, but suspension polymerization generally only obtains granular products, the so-called porous microspheres, and it is difficult to obtain integral continuous block porous polymer materials. Other methods For example, the phase separation method and the stretching method are to make the existing polymer into a porous film by physical means, and although the micro-foaming technology can obtain a block of porous material, it needs to rely on a special physical process (such as supercritical carbon dioxide gasification process), the technical application area is relatively narrow
Overall, the field lacks a convenient and flexible method to prepare monolithic continuous bulk porous polymer materials

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
  • Method of preparing line type polyolefin cellular material
  • Method of preparing line type polyolefin cellular material
  • Method of preparing line type polyolefin cellular material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Slowly add the olefinic monomer containing the initiator: 10 grams of styrene (S) is dissolved in 30 grams of polyethylene glycol 1000 and 10 grams of dioxane medium to obtain a clear solution, and react and polymerize at 60 ° C for at least 6 hours , the viscosity of the solution increases continuously, and then phase separation gradually occurs. During the phase separation, the system gradually turns milky white, and finally condenses into a jelly-like block. Put it into water, dissolve and remove polyethylene glycol, etc., to obtain a linear Polyolefin porous material. In the polymerization process, if the decomposition activation energy of the initiator is too high or the half-life is too long, the decomposition rate will be too low, which will prolong the polymerization time. However, if the activation energy is too low or the half-life is too short, the initiation is too fast, the temperature is difficult to control, and implosion may be caused; or the initiator d...

Embodiment 2～4

[0032] Slowly add the olefinic monomer containing initiator dibenzoyl peroxide (BPO): 10 grams of styrene (S) are dissolved in 30 grams of polyethylene glycol 1000 and dioxane mixed medium to obtain a clear solution. 60 ℃ constant temperature reaction polymerization for at least 6 hours, the viscosity of the solution increases continuously, then phase separation gradually occurs, forming a white gel, and finally solidifies into a block, put the solid into water, dissolve and remove polyethylene glycol, etc., to obtain a linear Polyolefin porous material. The weights of dioxane were 6 grams, 8 grams, and 12 grams respectively. The rest of the conditions and operations were the same as those in Example 1, and the corresponding linear polyolefin porous materials were prepared. The pore diameters are shown in Table 1.

[0033] Example 1

Embodiment 5

[0035] Slowly add olefinic monomers containing initiator azobisisobutyronitrile (AIBN): 10 grams of acrylonitrile (AN) dissolved in 30 grams of polyethylene glycol 1000 and 8 grams of dimethylformamide (DMF) medium, Obtain a clear solution, react and polymerize at a constant temperature of 65°C for at least 6 hours, the viscosity of the solution increases continuously, then phase separation gradually occurs, forming a white gel, and finally solidifies into a block, put the solid into water, dissolve and remove polyethylene glycol etc. to obtain linear polyolefin porous materials. The average pore diameter is 0.45 μm.

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
pore sizeaaaaaaaaaa
pore sizeaaaaaaaaaa
pore sizeaaaaaaaaaa
Login to View More

Abstract

This invention relates to a preparation method of linear polyolefin porous materials. Polymerization monomer uses olefin monomers, such as acrylic, styrene, acrylonitrile, vinyl acetate and functional monomer, to solve in a mixed solvent based on PEG or compatible with the appropriate solvent (or precipitation), and conduct free radical polymerization under organic initiators of azo and peroxide, appropriate temperature and atmosphere, but it is different from solution or precipitation polymerization, which has characteristics of phase separation promoted by polymerization, at last, it solidifies to be block and removes PEG, being the linear polyolefin porous materials. This material is an entirety, and has open and connective holes which average size is the degree of nanometer to micrometer, and which structure size can be controlled by PEG and mixed media.

Description

technical field [0001] The present invention relates to a method for linear olefin polymer porous materials. Background technique [0002] In recent years, the preparation technology of polymer porous materials has been developed rapidly, and a variety of molding processes and methods that can produce tiny pores in the polymer matrix have been developed, such as phase separation method, stretching method, nuclear track method, sintering method, etc. method, thermal decomposition method, suspension polymerization method, macromolecular structure template method, colloidal crystal template method, micro-foaming technology, etc. The materials prepared by these methods are very important in many fields due to their porous structure with large specific surface area. Its application value, including insulation materials, packaging materials, adsorption materials, controlled release materials, human bone substitute materials, chromatographic monolithic column materials, etc., has b...

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): C08F10/00C08F2/06C08F2/38C08J9/00
Inventor 张瑞丰肖通虎
Owner NINGBO 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