Polymeric polyamines and method for producing the same

a polyamine and polyamine technology, applied in the preparation of urea derivatives, chemistry apparatus and processes, organic chemistry, etc., can solve the problems of limiting the application of ag nanoparticles, the solution of such ag particles having less than 10% solid contents, and the inability to be formed, so as to increase the water solubility of the solution

Inactive Publication Date: 2011-11-24
NAT TAIWAN UNIV
View PDF8 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The method enables the production of stable silver nanoparticles with concentrations above 10 wt% in both water and organic solvents, maintaining nanoscale distribution and thermal stability, thereby expanding their application in composite materials and antimicrobial fields.

Problems solved by technology

That is, the existing conditions will restrict applications of the Ag nanoparticles.
However, the solutions of such Ag particles have solid contents less than 10% and can not be in the form of silver slurry, or have a higher solid content with aggregation.

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
  • Polymeric polyamines and method for producing the same
  • Polymeric polyamines and method for producing the same
  • Polymeric polyamines and method for producing the same

Examples

Experimental program
Comparison scheme
Effect test

example 1

Step (A): Preparing a Stabilizer POE2000-TMA / 4COOH

[0040]First, hydrophilic POE2000 (Jeffamine® ED-2001) is purified with sublimation. THF is dewatered with calcium hydride and then preserved with molecular sieves. Next, to a three-necked bottle (500 ml), POE2000 (100 g, 0.05 mol) is added and dissolved in THF (150 ml), and then anhydride linker TMA (19.2 g, 0.10 mol, previously dissolved in THF (50 ml)) is added drop by drop, so that molar ratio of POE2000 to TMA is 1:2. The reactant is mechanically stirred and filled with nitrogen during the whole reaction. The reaction is performed at 30° C. for 2 hours or longer. FT-IR spectrum is used for monitoring progress of the reaction by sampling every period of time until the anhydride functional groups disappear. After the reaction is completed, THF is removed by decompression to obtain creamy glue product, amido acid POE2000-TMA / 4COOH.

Step (B): Synthesizing Ag Nanoparticles (AgNP)

[0041]To a three-necked bottle, the stabilizer POE2000 / 4C...

example 2

Step (A): Preparing a Stabilizer POE2000-TMA / 2COOH

[0042]The product POE2000 / 4COOH of Example 1 is heated at 150° C. for 3 hours. Progress of the reaction is monitored with FT-IR for identifying imido functional groups. The product is imido acid POE2000 / 2COOH.

Step (B): Synthesizing Ag Nanoparticles (AgNP)

[0043]Repeat Step (B) of Example 1, but the stabilizer is replaced with POE2000 / 2COOH.

example 3

Step (A): Preparing Stabilizer POP2000-TMA / 4COOH

[0044]Repeat Step (A) of Example 1, but hydrophilic POE2000 is replaced with hydrophobic POP2000 to obtain product imido acid POP2000 / 4COOH.

Step (B): Synthesizing Ag Nanoparticles (AgNP)

[0045]Repeat Step (B) of Example 1, but the stabilizer is replaced with POE2000 / 4COOH.

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
solid contentaaaaaaaaaa
diametersaaaaaaaaaa
Login to View More

Abstract

The present invention discloses a polymeric polyamine which can be produced by polymerizing polyoxyalkylene-amine and a linker. The linker can be anhydride, carboxylic acid, epoxy, isocyanate or poly(styrene-co-maleic anhydride) copolymers (SMA). The present invention also discloses a method for stabilizing the Ag nanoparticles with polymeric polyamine. The polymeric polyamine serving as a stabilizer or dispersant is mixed with a water solution of silver salt and then a reducer is provided to reduce the silver ions and form an organic or a water solution of Ag nanoparticles. Water or solvent of this solution can be further removed through a heating, freezing or decompression process, and thus solid content of the solution can be increased. The concentrated solution also can be diluted to obtain a stable dispersion without aggregation.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]The present application is a division of prior U.S. application Ser. No. 12 / 140,507 filed Jun. 17, 2008, entitled “POLYMERIC POLYAMINES AND METHOD FOR STABILIZING SILVER NANOPARTICLE BY EMPLOYING THE SAME”. The prior U.S. Application claims priority of Taiwan Patent Application No. 096146929, filed on Dec. 7, 2007, the entirety of which is incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to polymeric polyamines and a method for stabilizing Ag nanoparticles by employing the same. The produced Ag nanoparticles are in the form of silver slurry, silver gel or solid, and suitable for composite material or antimicrobial material. Fields of the present invention include electric industries, for example, conductive silver nanowires, parts and sensors, and biomedicine or medicinal industries. In addition, the Ag nanoparticles have both hydrophilic and hydrophobic propert...

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 & AuthorityApplications(United States)
IPC IPC(8): C08F8/32C07D403/12C08F220/08C07D307/60C07C275/24C07C235/84C07C235/78
CPCC08F26/00
InventorLIN, JIANG-JENTSAI, WEI-CHENGHSU, YEN-CHICHANG, WEN-HSIN
OwnerNAT TAIWAN UNIV