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

Polypyrrole porous hollow nano microsphere and preparation method and application thereof

A technology of nano-microspheres and polypyrrole, applied in the field of nanotechnology, can solve problems such as poor application in industrial production, single structure of polypyrrole, toxic and harmful chemicals, etc.

Inactive Publication Date: 2020-11-24
TIANJIN POLYTECHNIC UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the synthesis methods of polypyrrole include electrochemical oxidation polymerization and chemical polymerization. However, the prepared polypyrrole has a single structure and cannot be well applied to industrial production.
In order to prepare polypyrrole with a special structure, researchers have developed a variety of methods including template polymerization, interfacial polymerization, seed polymerization, etc., especially polypyrrole can be in dilute hydrochloric acid environment, ammonium persulfate as an oxidant, through chemical oxidation polymerization method Preparation, however, these synthetic methods use toxic and harmful chemicals, which bring inevitable harmful effects to nature, so the research on the green synthesis of polypyrrole with special structure has aroused great interest of researchers

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
  • Polypyrrole porous hollow nano microsphere and preparation method and application thereof
  • Polypyrrole porous hollow nano microsphere and preparation method and application thereof
  • Polypyrrole porous hollow nano microsphere and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Dissolve a certain amount of Pebax1657 in a mixed solution of ethanol / water (70wt% / 30wt%), heat at 80°C for two hours, add a certain amount of polypyrrole porous hollow nanospheres to the mixed solution, and disperse evenly with ultrasonic stirring. The mixed solution was poured into a polytetrafluoroethylene mold, left at room temperature for 24 hours, and vacuum-dried in a vacuum oven at 45° C. for 24 hours.

[0015] Table 1 Permeation separation performance of Pebax / polypyrrole porous hollow nanosphere mixed matrix membrane

[0016]

Embodiment 2

[0018] Polyethylene glycol methacrylate (PEGMEA) was used as a monomer, pentaerythritol triacrylate (PETA) was used as a crosslinking agent, polypyrrole porous hollow nanospheres were used as a filling material, and a certain amount of photoinitiator was added. The mixed solution was poured into a brown bottle and ultrasonically dispersed evenly, placed between two glass plates, and the thickness was controlled by a copper wire to prepare a series of gas separation membranes. Carry out gas permeation performance test to the film and find that, N 2 、CH 4 , CO 2 Compared with the original membrane, the permeation performance is increased by about 2 times, and its selectivity remains unchanged.

Embodiment 3

[0020] Weigh a certain proportion of polydimethylsiloxane and its crosslinking agent and n-heptane, stir evenly, then add polypyrrole porous hollow nano-microspheres, stir and ultrasonically, and coat it on the PVDF porous bottom membrane . The coated film was placed in a fume hood to volatilize naturally for several hours, and then placed in an oven for thermal crosslinking. The mass ratio of polypyrrole porous hollow nano microspheres to polydimethylsiloxane is 1%-5%, and the obtained membrane is dried and used for pervaporation. Pervaporation test conditions: the vacuum on the downstream side is 5mmHg absolute negative pressure, and the cold well is condensed and collected; the operating temperature on the upstream side is 40°C, and the feed liquid is 5wt% ethanol aqueous solution (mass fraction). Its performance is shown in Table 2.

[0021] Table 2 Ethanol separation performance of polydimethylsiloxane / polypyrrole porous hollow nanosphere mixed matrix membrane

[0022]...

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 a nano technology and a high polymer technology, and in particular to a polypyrrole hollow nano microsphere with a porous shell and a preparation method and application thereof. The preparation process can be carried out as follows: under an action of ferric chloride serving as an oxidant, pyrrole monomer polymerizes on a surface of nano silicon dioxide template at a low temperature, then hydrofluoric acid is used for etching, a hollow structure is formed after the template is removed, and nano-scale holes are left in the polypyrrole shell layer. The polypyrrole poroushollow nanospheres can be used as fillers for preparing gas separation membranes, pervaporation membranes, nanofiltration membranes and the like.

Description

technical field [0001] The invention relates to nanometer technology and polymer technology, in particular to a polypyrrole porous hollow nanometer microsphere, its preparation method and application. Background technique [0002] Due to its unique properties, polypyrrole has been used in many fields. At present, the synthesis methods of polypyrrole include electrochemical oxidation polymerization and chemical polymerization. However, the prepared polypyrrole has a single structure and cannot be well applied to industrial production. In order to prepare polypyrrole with a special structure, researchers have developed a variety of methods including template polymerization, interfacial polymerization, seed polymerization, etc., especially polypyrrole can be in dilute hydrochloric acid environment, ammonium persulfate as an oxidant, through chemical oxidation polymerization method Preparation, however, these synthetic methods use toxic and harmful chemicals, which bring inevit...

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): B01J13/14C08G73/06B01D53/22B01D71/68B01D69/12B01D61/00
CPCB01J13/14C08G73/0611B01D53/228B01D71/68B01D69/12B01D61/027
Inventor 丁晓莉王鑫兰李晓峰赵红永曹倩倩张玉忠
Owner TIANJIN POLYTECHNIC UNIV
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com