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

Photo-induced reversible macromolecular shrink film and preparation method thereof

A polymer, shrink film technology, applied in flat products, other household appliances, applications, etc., can solve the problems of high cost and complex modification process, and achieve the effect of low cost and high reuse rate

Active Publication Date: 2017-09-12
SICHUAN UNIV
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of its own material factors, its shrinkage rate is only about 30%, and the shrinkage rate of PE heat shrinkable film after copolymerization modification can reach 70%, but the modification process is complicated and the cost is high

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
  • Photo-induced reversible macromolecular shrink film and preparation method thereof
  • Photo-induced reversible macromolecular shrink film and preparation method thereof
  • Photo-induced reversible macromolecular shrink film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Example 1 Preparation of Photopolymer Shrink Film

[0051] The photopolymer shrink film is prepared by the following steps:

[0052] (1) Preparation of oxidized carbon nanotubes: carbon nanotubes are oxidized in a mixed solution of nitric acid / hydrochloric acid / water (nitric acid: hydrochloric acid: water = 1:1:1, volume ratio) at 80°C for 4 hours with magnetic stirring and centrifuged to obtain carbon dioxide Nanotubes were washed with distilled water and dried for later use; the mass fraction of carbon nanotubes in the mixture was 0.5wt%, the oxidation temperature was 80°C, and the oxidation time was 4h;

[0053] (2) Preparation of sulfonated carbon nanotubes: add oxidized carbon nanotubes in (1) to obtain a suspension after adding distilled water to ultrasonic for 1 h (the mass fraction of oxidized carbon nanotubes in the resulting suspension is 0.25wt%), and the suspension is added dropwise to The hydrochloric acid solution (in the hydrochloric acid solution) that ...

Embodiment 2

[0060] Example 2 Preparation of Photopolymer Shrink Film

[0061] The photopolymer shrink film is prepared by the following steps:

[0062] (1) Preparation of oxidized carbon nanotubes: carbon nanotubes are oxidized in a mixed solution of nitric acid / hydrochloric acid / water (nitric acid: hydrochloric acid: water = 1:1:1, volume ratio) at 80°C for 4 hours with magnetic stirring and centrifuged to obtain carbon dioxide Nanotubes were washed with distilled water and dried for later use; the mass fraction of carbon nanotubes in the mixture was 0.5wt%, the oxidation temperature was 80°C, and the oxidation time was 4h;

[0063] (2) Preparation of sulfonated carbon nanotubes: add oxidized carbon nanotubes in (1) to obtain a suspension after adding distilled water to ultrasonic for 1 h (the mass fraction of oxidized carbon nanotubes in the resulting suspension is 0.25wt%), and the suspension is added dropwise to The hydrochloric acid solution (in the hydrochloric acid solution) that ...

Embodiment 3

[0074] Example 3 Preparation of Photopolymer Shrink Film

[0075] The photopolymer shrink film is prepared by the following steps:

[0076] (1) Preparation of oxidized carbon nanotubes: carbon nanotubes are oxidized in a mixed solution of nitric acid / hydrochloric acid / water (nitric acid: hydrochloric acid: water = 1:1:1, volume ratio) at 80°C for 4 hours with magnetic stirring and centrifuged to obtain carbon dioxide Nanotubes were washed with distilled water and dried for later use; the mass fraction of carbon nanotubes in the mixture was 0.5wt%, the oxidation temperature was 80°C, and the oxidation time was 4h;

[0077] (2) Preparation of sulfonated carbon nanotubes: add oxidized carbon nanotubes in (1) to obtain a suspension after adding distilled water to ultrasonic for 1 h (the mass fraction of oxidized carbon nanotubes in the resulting suspension is 0.25wt%), and the suspension is added dropwise to The hydrochloric acid solution (in the hydrochloric acid solution) that ...

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 belongs to the field of functional composite materials and relates to a photo-induced reversible macromolecular shrink film and a preparation method thereof. The photo-induced reversible macromolecular shrink film is prepared from, by weight, 70-95 parts of a polymer and 5-30 parts of a polyurethane / modified carbon nanotube composite, wherein the mass fraction of modified carbon nanotubes in the polyurethane / modified carbon nanotube composite is 0.2%-5%, the modified carbon nanotubes refer to sulfonated carbon nanotubes obtained by subjecting carbon nanotubes to oxidation, sulfonation and reducing treatment, and the polymer refers to polyethylene or polypropylene. The photo-induced reversible macromolecular shrink film has a photo-responsive property and is capable of shrinking by 70% or above through infrared illumination.

Description

technical field [0001] The invention relates to a photoreversible polymer shrink film and a preparation method thereof, belonging to the field of functional composite materials. Background technique [0002] Heat-shrinkable film is a film material widely used in the packaging field. Due to its thermal shrinkage properties, it is favored in the packaging field. The heat shrinkable film must have high puncture resistance, good shrinkage and certain shrinkage stress. The current mainstream heat shrinkable films are: [0003] Polyethylene (PE) film and PE heat shrinkable film are widely used in the integrated packaging of wine, cans, mineral water, various beverages, cloth and other products. The film has the characteristics of good flexibility, impact resistance, strong tear resistance, not easy to break, not afraid of moisture, and large shrinkage rate. [0004] POF film, POF heat shrinkable film is a multi-layer co-extruded polyolefin film. The film has the characteristics...

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): C08L23/08C08L75/04C08K9/04C08K9/02C08K7/24B29D7/01
CPCB29D7/01C08J5/18C08J2323/08C08J2475/04C08K2201/011C08L23/0815C08L2203/16C08L75/04C08K9/04C08K9/02C08K7/24
Inventor 杨伟喻鹏黄炎昊包睿莹刘正英杨鸣波
Owner SICHUAN 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