High-performance PLA alloy material and preparation method thereof

An alloy material and high-performance technology, applied in the field of PLA alloy material and its preparation, can solve the problems of decreased modulus and strength of composite materials, poor interfacial bonding force, low strength and modulus, etc., and achieve improved toughness, stable performance, The effect of improving mechanical properties

Inactive Publication Date: 2016-06-15
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For example, POE is used to enhance the toughness of PLA, but the interface bonding force between the two phases of PLA / POE is poor, and the purpose of toughening cannot be achieved.
In addition, since POE is a thermoplastic elastomer, its own strength and modulus are low, and the modulus and strength of the composite material will decrease after being added to PLA.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation of modified nano-silica

[0031] Dry the nano-silica in a vacuum drying oven at 60°C for 14 hours to remove the moisture on its surface;

[0032] Then add dry nano-silica and solvent toluene into the device equipped with a condenser, and carry out stirring and preheating under nitrogen atmosphere and 90°C oil bath heating;

[0033] Finally, add the catalyst stannous octoate and L-lactide, wherein the mass ratio of nano-silica, L-lactide, and stannous octoate is 1:0.1:0.01, and stir at a constant temperature after heating up to 100°C;

[0034] After the reaction, cool to room temperature for centrifugation, and finally wash the precipitate several times with chloroform to remove unreacted L-lactide adsorbed by physical action on the surface of the powder, and then dry to obtain modified nano-silica ;

[0035] (2) According to the proportion, put 70 parts of dry PLA, 10 parts of POE, 0.4 parts of EGMA, 8 parts of modified nano-silica prepared in (1), 101...

Embodiment 2

[0038] (1) Preparation of modified nano-silica

[0039] Dry the nano silicon dioxide in a vacuum drying oven at 80°C for 10 hours to remove the moisture on its surface;

[0040] Then add dry nano-silica and toluene into the device equipped with a condenser, and carry out stirring and preheating under nitrogen atmosphere and 90°C oil bath heating;

[0041] Finally, the catalysts stannous octoate and L-lactide are added, wherein the mass ratio of nano-silica, L-lactide and stannous octoate is 1:0.4:0.03, and the temperature is raised to 120°C and stirred at a constant temperature;

[0042] After the reaction is completed, cool to room temperature for centrifugation, and then wash the precipitate with chloroform several times to remove the unreacted L-lactide adsorbed on the surface of the powder due to physical effects, and then dry to obtain modified nano-silica;

[0043] (2) According to the proportion, 90 parts of dry PLA, 30 parts of POE, 0.8 parts of EGMA, 14 parts of modi...

Embodiment 3

[0046] (1) Preparation of modified nano-silica

[0047] Dry the nano-silica in a vacuum drying oven at 70°C for 12 hours to remove the moisture on its surface;

[0048] Then add dry nano-silica and toluene into the device equipped with a condenser, and carry out stirring and preheating under nitrogen atmosphere and 90°C oil bath heating;

[0049] Finally, add the catalyst stannous octoate and L-lactide, wherein the mass ratio of nano-silica, L-lactide, and stannous octoate is 1:0.1:0.03, and stir at a constant temperature after heating up to 110°C;

[0050] After the reaction is completed, cool to room temperature for centrifugation, and then wash the precipitate with chloroform several times to remove the unreacted L-lactide adsorbed on the surface of the powder due to physical effects, and then dry to obtain modified nano-silica;

[0051](2) According to the proportion, 80 parts of dry PLA, 20 parts of POE, 0.6 parts of EGMA, 11 parts of modified nano-silica, 10100.25 parts...

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Abstract

The invention relates to a high-performance PLA alloy material and a preparation method thereof. The high-performance PLA alloy material is composed of 70-90 parts of polylactic acid, 10-30 parts of an ethylene-octylene random copolymer, 0.4-0.8 parts of an ethylene-glycidyl methacrylate copolymer, 8-14 parts of modified nano silicon dioxide and 0.3-0.7 parts of an antioxidant. The material is prepared by mixing and extruding the components hereinabove. The POE is used for improving the flexibility of the PLA, wherein a compatibilizer EGMA is added for improving compatibility of the PLA/POD mixture, thereby increasing the interface bonding force between the two phases and improving the performance of the mixture. The modified nano silicon dioxide can improve the strength, rigidity and toughness of the polymer. The PLA alloy material is high in strength, is good in toughness and is environment-friendly, and can be widely used in the fields of package materials, toys, electronic appliance and household article.

Description

technical field [0001] The invention relates to the technical field of polymer composite materials, in particular to a PLA alloy material and a preparation method thereof. Background technique [0002] Polylactic acid (PLA) has attracted widespread attention in the industry for its good biodegradability and high mechanical properties. However, compared with petroleum-based engineering plastics widely used in industry, PLA's brittleness and low crystallization ability greatly limit its wide application. The ethylene-octene random copolymer (POE) has good toughness, and also has excellent properties such as aging resistance, ozone resistance, and chemical medium resistance. It is precisely because of the excellent performance of POE that it is used in the automotive industry, wire and cable protection It has been widely used in sleeves, plastic toughening agents and so on. [0003] For example, POE is used to enhance the toughness of PLA, but the interface bonding force be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L23/08C08K13/06C08K9/04C08K3/36B29C47/92B29C48/92
Inventor 杨桂生刘凯
Owner HEFEI GENIUS NEW MATERIALS
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