Graphene/polylactic acid composite material and preparation method thereof

A composite material, polylactic acid technology, applied in the field of graphene/polylactic acid composite material and its preparation, can solve the problems of insufficient notched impact strength, unobvious impact toughness, poor heat resistance of composite materials, etc., and achieve easy mass production , good electrical properties, good heat resistance

Active Publication Date: 2011-08-31
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
View PDF1 Cites 30 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the brittleness of polylactic acid is relatively large, and the notched impact strength is less than 3kJ/m2; its heat resistance is also poor, and the heat distortion temperature is only about 60°C. Application in Engineering Structural Materials
For example, NagasawaN. and MitomoH. greatly improved the heat resistance of polylactic acid (NagasawaN., KanedaA., KanazawaS., YagiT., MitomoH., YoshiiF., TamadaM.NuclearInstruments&MethodsinPhysicsResearch2005, B236: 611; MitomoH., KanedaA., QuynhT.M., NagasawaN., YoshiiF.Polymer200

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
  • Graphene/polylactic acid composite material and preparation method thereof
  • Graphene/polylactic acid composite material and preparation method thereof
  • Graphene/polylactic acid composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] The invention also provides a method for preparing the graphene / polylactic acid composite material, which includes the following steps:

[0030] a) Disperse graphene oxide in water to obtain a graphene oxide dispersion;

[0031] b) Under stirring conditions, the polylactic acid solution is added to the graphene oxide dispersion liquid, the uniformly stirred mixed solution is allowed to stand for stratification, and the master batch is obtained after filtration;

[0032] c) blending the masterbatch with polylactic acid to obtain a graphene / polylactic acid composite material.

[0033] Similar to graphene, graphene oxide is a material with a two-dimensional monoatomic layer plane structure composed of six-membered carbon rings, which is prone to agglomeration. The present invention first disperses graphene oxide in water to prepare a graphene oxide dispersion. In order to make the graphene oxide uniformly dispersed, the present invention preferably adopts an ultrasonic method to ...

Example Embodiment

[0053] Example 1

[0054] Disperse graphene oxide ultrasonically in deionized water to prepare a 0.3mg / mL graphene oxide colloidal dispersion; dissolve polylactic acid in chloroform under heating and stirring conditions to prepare a 0.1g / mL polylactic acid solution; Under the condition of 60℃ and vigorous stirring, slowly add 1000mL polylactic acid solution to 1000mL graphene oxide colloidal dispersion, and stir for 5h at a constant temperature of 60℃. The resulting mixture is allowed to stand for stratification, and the lower layer precipitate is filtered out, and after drying , Get the masterbatch;

[0055] 30g of masterbatch and 30g of polylactic acid are added to the internal mixer, and melt blended at 170°C to obtain a graphene / polylactic acid composite material. In the graphene / polylactic acid composite material, the mass percentage of graphene in polylactic acid is about 0.15%;

[0056] The performance test of the graphene / polylactic acid composite material is performed, and...

Example Embodiment

[0057] Example 2

[0058] Disperse graphene oxide ultrasonically in deionized water to prepare a 2mg / mL graphene oxide colloidal dispersion; dissolve polylactic acid in chloroform under heating and stirring conditions to prepare a 0.1g / mL polylactic acid solution; Under the condition of 60°C and vigorous stirring, slowly add 1000mL polylactic acid solution to 1000mL graphene oxide colloidal dispersion, and stir for 5h at a constant temperature of 60°C. The resulting mixture is allowed to stand for stratification, and the lower layer precipitate is filtered out. After drying, Get the masterbatch

[0059] 30g of masterbatch and 30g of polylactic acid are added to the internal mixer, and melt blended at 170°C to obtain a graphene / polylactic acid composite material. In the graphene / polylactic acid composite material, the mass percentage of graphene in polylactic acid is about 0.99%;

[0060] The performance test of the graphene / polylactic acid composite material is performed, and the r...

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
Concentrationaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Tensile modulus of elasticityaaaaaaaaaa
Login to view more

Abstract

The invention provides a graphene/polylactic acid composite material, comprising the polylactic acid and graphene oxide, wherein the graphene oxide, by mass, accounts for 0.1% to 5% of the polylactic acid. The invention also provides a preparation method of the graphene/polylactic acid composite material,comprising the steps of: a) dispersing the graphene oxide in water for acquiring graphene oxide dispersion liquid; b) adding polylactic acid solution to the graphene oxide dispersion liquid under stirring condition, letting the uniformly stirred mixed solution stand for layering and filteringfor obtaining master batch; and c) blending the master batch with the polylactic acid for obtaining the graphene/polylactic acid composite material. Experiments show that the graphene/polylactic acidcomposite material provided in the invention has a tensile strength up to 79 MPa, a tensile elastic modulus up to 3100 MPa, a notch impact strength up to 12 KJ/m<2> and a heat deflection temperature up to 95 DEG C.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, and in particular relates to a graphene / polylactic acid composite material and a preparation method thereof. Background technique [0002] Polylactic acid is a biodegradable polymer obtained by condensation of lactic acid or ring-opening polymerization of lactide. In addition to the advantages of wide source of raw materials and renewable, non-polluting production process, polylactic acid has good biocompatibility, Gloss and transparency, but also have certain bacteria resistance, flame retardancy and UV resistance, widely used in packaging materials, medical materials, fibers, nonwovens, etc. in clothing, papermaking, construction, biomedicine and other fields. However, polylactic acid is relatively brittle, and its notched impact strength is less than 3kJ / m 2 ; Its heat resistance is also poor, and the heat distortion temperature is only about 60°C. These two shortcomings l...

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): C08L67/04C08K9/02C08K3/04C08J3/22
Inventor 邓鹏飏尹园郑春柏
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap