Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for synthesizing uniform symmetric or asymmetric nanoparticles, large-sized and modified nanoparticles

A nanoparticle, asymmetric technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of increasing cost and hindering application

Active Publication Date: 2021-11-26
FUDAN UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this synthetic method requires a relatively high concentration of surfactant, i.e. above its critical micelle concentration (CMC), resulting in high cost for large-scale production
In addition, the use of micellar templates leads to the introduction of a certain amount of organic impurities in the silica nanoparticles, and after the selective removal of the micellar templates, the resulting porous structure inside the silica nanoparticles hinders its unneeded Applications in case of pores or organic matter

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
  • A method for synthesizing uniform symmetric or asymmetric nanoparticles, large-sized and modified nanoparticles
  • A method for synthesizing uniform symmetric or asymmetric nanoparticles, large-sized and modified nanoparticles
  • A method for synthesizing uniform symmetric or asymmetric nanoparticles, large-sized and modified nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] The invention provides a method for synthesizing uniform symmetrical or asymmetrical nanoparticles, comprising the following steps:

[0031] dissolving the copolymer in an organic solvent to obtain a copolymer solution;

[0032] mixing the copolymer solution with ammonia water to obtain a polymer single-chain nanoparticle seed dispersion;

[0033] Mixing the polymer single-chain nanoparticle seed dispersion with the nanoparticle precursor and performing a sol-gel reaction to obtain uniform symmetrical or asymmetrical nanoparticles;

[0034] The copolymers include random copolymers or block-random copolymers; acrylic monomers and styrene are included in the copolymers.

[0035] In the invention, the copolymer is dissolved in an organic solvent to obtain a copolymer solution. In the present invention, the copolymer includes random copolymer or block-random copolymer; acrylic monomer and styrene are included in the copolymer.

[0036] In the present invention, the rando...

Embodiment 1

[0074] Poly(methacrylic acid-r-styrene) (P(MAA 0.2 -r-St 0.8 ) 100 ) as a seed template to synthesize silica nanoparticles with a diameter of 38nm; P(MAA 0.2 -r-St 0.8 ) 100 The molar percentage of methacrylic acid (MAA) is 20%, P(MAA 0.2 -r-St 0.8 ) 100 The number of repeating units is 100.

[0075] 500mg P(MAA 0.2 -r-St 0.8 ) 100 Dissolve in 500mL of 2-butanone, add 21mL of 25% ammonia water and 21mL of ethanol, ultrasonically disperse under 100W power for 20s, then add 28.5mL orthosilicate methyl ester, and ultrasonically disperse under 100W for 20s , the reaction solution was left standing at room temperature for 24 hours, the sol-gel reaction was completed, and monodisperse silica nanoparticles were obtained. Characterized by testing, the average diameter of monodisperse silica nanoparticles is 38nm.

Embodiment 2

[0077] With poly(acrylic acid-r-styrene) (P(AA 0.3 -r-St 0.7 ) 80 ) as a seed template to synthesize silica nanoparticles with a diameter of 53nm; P(AA 0.3 -r-St 0.7 ) 80 The molar percentage of acrylic acid (AA) is 30%, P(AA 0.3 -r-St 0.7 ) 80 The number of repeating units is 80.

[0078] 500mg P(AA 0.3 -r-St 0.7 ) 80 Dissolve in 500mL of tetrahydrofuran (THF), add 21mL of 25% ammonia water and 21mL of ethanol, ultrasonically disperse for 20s under 20W power condition, then add 35.7mL orthosilicate ethyl ester, ultrasonically disperse for 20s under 20W power condition , the reaction solution was left standing at room temperature for 24 hours, the sol-gel reaction was completed, and monodisperse silica nanoparticles were obtained. Characterized by testing, the average diameter of monodisperse silica nanoparticles is 53nm.

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
sizeaaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a method for synthesizing uniform symmetrical or asymmetrical nanoparticles and relates to the technical field of nanoparticle synthesis. The synthesis method provided by the invention comprises the following steps: dissolving the copolymer in an organic solvent to obtain a copolymer solution; mixing the copolymer solution with ammonia water to obtain a polymer single-chain nanoparticle seed dispersion; The single-chain nanoparticle seed dispersion is mixed with the nanoparticle precursor, and a sol-gel reaction is performed to obtain a uniform symmetrical or asymmetrical nanoparticle; the copolymer includes a random copolymer or a block-random copolymer; the Acrylic monomers and styrene are included in the copolymer. By controlling the structure and composition of the copolymer, the invention can obtain uniform symmetrical or asymmetrical nanoparticles, the operation steps are simple and suitable for large-scale production, and no organic impurities are introduced during the synthesis process, which is convenient for later application.

Description

technical field [0001] The invention relates to the technical field of nanoparticle synthesis, in particular to a method for synthesizing uniform symmetrical or asymmetrical nanoparticle, large-sized and modified nanoparticle. Background technique [0002] Amorphous silica nanoparticles have attracted much attention due to their wide applications in cosmetics, paints, pharmaceuticals, dentistry, and electronics. Uniform silica nanoparticles with controllable size, shape, and morphology are desired in many application situations. In particular, silica nanoparticles with asymmetric structures have emerged as a novel class of materials for drug delivery, nanoreactors, optical devices, and catalysis. Currently, monodisperse spherical silica nanoparticles can be synthesized by various wet chemical strategies, such as method, soft template method and reverse microemulsion technology. Compared with the one-step synthesis of symmetric silica nanoparticles, the preparation of asy...

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 Patents(China)
IPC IPC(8): C01B33/18B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B33/18C01P2004/04C01P2004/64
Inventor 聂志鸿张艳易成林吴琪陶晶沈晓雪
Owner FUDAN UNIV
Features
  • R&D
  • 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