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

Core-shell structure nano composite particle system with gradient-changing shell-core ratio and preparation method thereof

A gradient change and nano-composite technology, applied in the core-shell structure nano-composite particle system and its preparation field, can solve the problems of complex synthesis process and difficulty in large-scale production, and achieve low cost, novel preparation method and short cycle Effect

Active Publication Date: 2020-11-03
JIANGSU UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most of the core-shell particles are prepared by chemically grafting polymer molecules on the surface of rigid nanoparticles. The synthesis process is generally complicated and it is difficult to achieve large-scale production.

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
  • Core-shell structure nano composite particle system with gradient-changing shell-core ratio and preparation method thereof
  • Core-shell structure nano composite particle system with gradient-changing shell-core ratio and preparation method thereof
  • Core-shell structure nano composite particle system with gradient-changing shell-core ratio and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] This implementation case shows a preparation method of a core-shell structure nanocomposite particle system with a gradient change in the core-shell ratio according to the following steps:

[0052] A PVP and Ludox AS40 SiO with molecular weights of 8 kDa, 40 kDa, 360 kDa and 1300 kDa 2 The steps of preparing a core-shell structure nanocomposite particle system with a gradient change in shell-core ratio as raw materials are as follows:

[0053] (1) Prepare four PVP solutions with molecular weights of 8 kDa, 40 kDa, 360 kDa and 1300 kDa respectively, with a volume of 200ml and a concentration of 0.1wt%.

[0054] (2) Prepare four 150 ml portions of SiO with a concentration of 0.2wt% 2 nanoparticle dispersion.

[0055] (3) The above four SiO 2 The nanoparticle dispersion was added dropwise into four vigorously stirred PVP solutions with molecular weights of 8 kDa, 40 kDa, 360 kDa and 1300 kDa, the stirring rate was 300 rpm, and the stirring was continued for 8 h to ensur...

Embodiment 2

[0062] This implementation case shows a preparation method of a core-shell structure nanocomposite particle system with a gradient change in the core-shell ratio according to the following steps:

[0063] A PVP and Ludox AS40 SiO with molecular weights of 8 kDa, 40 kDa, 360 kDa and 1300 kDa 2 The steps of preparing a core-shell structure nanocomposite particle system with a gradient change in shell-core ratio as raw materials are as follows:

[0064] (1) Prepare four PVP solutions with molecular weights of 8 kDa, 40 kDa, 360 kDa and 1300 kDa respectively, with a volume of 200ml and a concentration of 0.1wt%.

[0065] (2) Prepare four 150 ml portions of SiO with a concentration of 0.2wt% 2 nanoparticle dispersion.

[0066] (3) The above four SiO 2 The nanoparticle dispersion was added dropwise into four vigorously stirred PVP solutions with molecular weights of 8 kDa, 40 kDa, 360 kDa and 1300 kDa, the stirring rate was 800 rpm, and the stirring was continued for 5 h to ensur...

Embodiment 3

[0072] A PVP and Ludox AS40 SiO with molecular weights of 8 kDa, 40 kDa, 360 kDa and 1300 kDa 2 The steps of preparing a core-shell structure nanocomposite particle system with a gradient change in shell-core ratio as raw materials are as follows:

[0073] (1) Prepare four PVP solutions with molecular weights of 8 kDa, 40 kDa, 360 kDa and 1300 kDa respectively, with a volume of 200ml and a concentration of 0.1wt%.

[0074] (2) Prepare four 150 ml portions of SiO with a concentration of 0.2wt% 2 nanoparticle dispersion.

[0075] (3) The above four SiO 2 The nanoparticle dispersion was added dropwise into four vigorously stirred PVP solutions with molecular weights of 8 kDa, 40 kDa, 360 kDa and 1300 kDa, the stirring rate was 500 rpm, and the stirring was continued for 1 h to ensure that the SiO 2 The surface of the nanoparticles is completely adsorbed by PVP. After the adsorption is completed, the four PVP-SiO 2 The nanoparticle dispersion was centrifuged for 4 hours, and t...

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 discloses a core-shell structure nano-composite particle system with a gradient-changing shell-core ratio and a preparation method thereof. The core-shell particle system is formed by aSiO2 nano-particle core body and a PVP shell physically adsorbed on the surface of the SiO2 nano-particle core body; based on a physical adsorption method, the adsorption configuration and the adsorption shell thickness of PVP on the surfaces of SiO2 nano-particles are regulated and controlled by changing the molecular weight of PVP, and then preparation of a core-shell structure nano-composite particle system with the shell-core ratio changing in a gradient mode is achieved. The method disclosed by the invention is novel in thought, simple and convenient to operate, short in synthesis period,low in cost and universal, and the prepared core-shell structure nano composite particle system with the gradient-changing shell-core ratio can realize regulation and control on a nano structure, compression performance and shear rheological property of a core-shell particle self-assembled film; therefore, the product has great potential application value in the fields of preparation of functional soft substances (foam, emulsion, microcapsules and the like), drug delivery and the like.

Description

technical field [0001] The invention belongs to the field of inorganic nanocomposite materials, and in particular relates to a core-shell structure nanocomposite particle system with a gradient change in shell-core ratio and a preparation method thereof. Background technique [0002] The self-assembly of nanoparticles at the gas-liquid / liquid-liquid interface has important applications in the preparation of functional soft materials (foams, emulsions, microcapsules, etc.), drug delivery, precision optical instrument manufacturing, and energy catalysis. How to efficiently edit the behavior of nanoparticles at the gas-liquid / liquid-liquid interface to precisely control the nanostructure, compressive properties, and shear rheological properties of nanoparticle self-assembled films is a key scientific issue in the study of nanoparticle interface self-assembly. The interfacial activity of conventional rigid nanoparticles is usually controlled by their contact angle (wettability),...

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): C08J3/12C08L39/06C08K3/36
CPCC08J3/126C08J2339/06C08K3/36C08K2201/011
Inventor 于凯李彬王军锋王贞涛
Owner JIANGSU 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