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

Polylactic acid foamed material having nano foam pores and preparation method thereof

A foam material, polylactic acid technology, applied in the field of polylactic acid foam material, can solve the problems of increased cell size, cell merging, unfavorable PLA nanofoam preparation, etc. Effect of Foam Density

Active Publication Date: 2019-01-29
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
View PDF3 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using CO 2 Preparation of PLA nanofoams is quite challenging, mainly because of the CO 2 Compared with nitrogen, CO 2 The diffusion coefficient is high, and the high diffusion coefficient is conducive to the rapid nucleation and growth of cells, but it is also easy to cause the cells to merge and increase the cell size, which is not conducive to the preparation of PLA nanofoam

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
  • Polylactic acid foamed material having nano foam pores and preparation method thereof
  • Polylactic acid foamed material having nano foam pores and preparation method thereof
  • Polylactic acid foamed material having nano foam pores and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The polylactic acid foam material with nano-cells of embodiment 1, comprises the component of following quality:

[0059] Polylactic acid resin 59.937g;

[0060] Epoxy chain extender 0.06g;

[0061] Hydroxy-functionalized graphene (HG) 0.003g.

[0062] like figure 1 Shown, the preparation process of the polylactic acid foam material with nano-cell of embodiment 1 is as follows:

[0063] S1: Ingredients: equipped with the following components: 59.937g polylactic acid resin, 0.06g epoxy-based chain extender, 0.003g hydroxyl-functionalized graphene (HG);

[0064] S2. Dry the components obtained in step S1, put the components into a rotary cabinet rheometer for melting and blending, the melting temperature is 190 ° C, the rotation speed is 60 rads / min, and after blending for 15 minutes, a polymer with high melt strength is formed. Lactic acid blend;

[0065] S3. Cool the blend obtained in step S2, and use a flat plate rheometer to mold at a molding temperature of 190°C...

Embodiment 2

[0068] The polylactic acid foam material with nano-cells of embodiment 2, comprises the component of following quality:

[0069] Polylactic acid resin 57g;

[0070] Anhydride chain extender 1.5g;

[0071] Hydroxy-functionalized graphene (HG) 1.5g.

[0072] like figure 1 Shown, the preparation process of the polylactic acid foam material with nano-cell of embodiment 2 is as follows:

[0073] S1: Ingredients: equipped with the following components: 57g polylactic acid resin, 1.5g anhydride chain extender, 1.5g hydroxyl-functionalized graphene (HG);

[0074] S2. Dry the components obtained in step S1, put the components into a rotary cabinet rheometer for melting and blending, the melting temperature is 190 ° C, the rotation speed is 60 rads / min, and after blending for 15 minutes, a polymer with high melt strength is formed. Lactic acid blend;

[0075] S3. Cool the blend obtained in step S2, and use a flat plate rheometer to mold at a molding temperature of 190°C for 20 minu...

Embodiment 3

[0078] The polylactic acid foam material with nano-cells of embodiment 3, comprises the component of following quality:

[0079] Polylactic acid resin 54g;

[0080] Isocyanate chain extender 3g;

[0081] Cage polysilsesquioxane (POSS) 3g.

[0082] like figure 1 Shown, the preparation process of the polylactic acid foam material with nano-cell of embodiment 3 is as follows:

[0083] S1: Ingredients: equipped with the following components: 54g polylactic acid resin, 3g isocyanate chain extender, 3g cage polysilsesquioxane (POSS);

[0084] S2. Dry the components obtained in step S1, put the components into a rotary cabinet rheometer for melting and blending, the melting temperature is 170 ° C, the rotation speed is 80 rads / min, and after blending for 10 minutes, a polymer with high melt strength is formed. Lactic acid blend;

[0085] S3. Cool the blend obtained in step S2, and use a flat plate rheometer to mold at a molding temperature of 200°C for 10 minutes to prepare a sa...

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
Cell sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a polylactic acid foamed material having nano foam pores, which includes, by mass, 90.0-99.895% of polylactic resin, 0.1-5.0% of a chain extender, and 0.005-5.0% of filler. Theinvention also discloses a preparation method of the polylactic acid foamed material having nano foam pores. Through melt blending, the material is produced; by adding the chain extender, branching degree is increased and branching points are increased, crystallization nucleating points are increased, and rheologic character of the blend is improved and expandability of the material is improved.By adding the filler as heterogeneous nucleation points, crystallization degree and foam pore nucleation points are increased. The polylactic acid foamed material not only has high foaming rate and has nano-scale foam size. The polylactic acid foamed material is greatly improved in mechanical performance, heat insulation and electic-conductivity.

Description

technical field [0001] The invention belongs to the technical field of polylactic acid (PLA) foam materials, and in particular relates to a polylactic acid foam material with nano cells and a preparation method thereof. Background technique [0002] In recent years, the price of petroleum has continued to increase and the ecological environment has become prominent, and the development of petroleum-based polymer materials has become more and more restricted. However, bio-based polymer materials from biological sources have received close attention from society due to their greenness. Among them, PLA is a degradable polymer synthesized from renewable resources, which has excellent mechanical properties, biocompatibility and food contact, and has become a research hotspot. PLA is completely decomposed under the action of microorganisms, water, acid, etc., and can be recycled. Widely used in various fields after processing such as extrusion, casting, blown film, injection mol...

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): C08L67/04C08L25/14C08L83/04C08K3/04C08K5/1515C08K5/29C08J9/12
CPCC08J9/0023C08J9/0028C08J9/0042C08J9/0061C08J9/0066C08J9/122C08J2203/06C08J2205/042C08J2367/04C08J2425/14C08J2483/04C08K3/04C08K5/1515C08K5/29C08K2201/003
Inventor 周洪福王向东
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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