Method for preparing Nano-composite material of poly lactic acid/montmorillonite

A nano-composite material and montmorillonite technology are applied in the field of preparation of polylactic acid/montmorillonite nano-composite materials to achieve the effects of improving flexural modulus, improving flexural strength, and a simple and effective preparation method.

Inactive Publication Date: 2006-04-19
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that there is still no satisfactory method for preparing polylactic acid / montmorillonite nanocomposites in the prior art

Method used

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  • Method for preparing Nano-composite material of poly lactic acid/montmorillonite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 100g polylactic acid, 25g organically modified montmorillonite, 0.9g antioxidant phosphite tris (2,4-di-tert-butylphenyl) ester were mixed uniformly, extruded and granulated with twin-screw extruder, extruded The output temperature is 155-200°C, the screw speed is 50-150rpm, and the masterbatch is obtained; then 100g polylactic acid, 5.1g masterbatch, 0.8g antioxidant phenylene diisodecyl phosphite are mixed evenly, and extruded by twin-screw Machine extrusion granulation, the extrusion temperature is 155-200°C, the screw speed is 50-150rpm, and the residence time of the material is 4-8 minutes to obtain the product. Its performance is shown in Table 1.

Embodiment 2

[0030] 100g polylactic acid, 20g organically modified montmorillonite, 0.95g antioxidant phosphite tris (2,4-di-tert-butylphenyl) ester were mixed uniformly, extruded and granulated with twin-screw extruder, extruded The outlet temperature is 155-200°C, and the screw speed is 50-150rpm to obtain the masterbatch; then mix 100g polylactic acid with 12.3g masterbatch, 0.8g antioxidant tris(2,4-di-tert-butylphenyl) The ester is mixed evenly, extruded and granulated by a twin-screw extruder, the extrusion temperature is 155-200°C, the screw speed is 50-150rpm, and the residence time of the material is 4-8 minutes to obtain the product. Its performance is shown in Table 1.

Embodiment 3

[0032] Mix 100g polylactic acid, 30g organically modified montmorillonite, and 1.0g antioxidant tris(2,4-di-tert-butylphenyl) phosphite evenly, extrude and granulate with a twin-screw extruder, and extrude The temperature is 155-200°C, the screw speed is 50-150rpm to obtain the masterbatch; then mix 100g polylactic acid with 18.06g masterbatch, 0.8g antioxidant tris(2,4-di-tert-butylphenyl) Mix evenly, extrude and granulate with a twin-screw extruder, the extrusion temperature is 155-200°C, the screw speed is 50-150rpm, and the residence time of the material is 4-8 minutes to obtain the product. Its performance is shown in Table 1.

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Abstract

A nano-class polylactic acid-montmorillonie composition is prepared from polylactic acid, organically modified montmorillonite with different interlayer gaps, compatibilizer and antioxidizing agent through fusing and mixing polylactic acid with said montmorillonite to obtain mother material, and fusing and mixing the mother material with polylactic acid. Its advantages are high mechanical performance, resistance to high temp and biodegradability.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method of a polylactic acid / montmorillonite nanocomposite material. Background technique [0002] Polylactic acid (PLA) is a green material. The raw material comes from renewable crops. The most prominent advantage is biodegradability. After use, it can be completely degraded to generate carbon dioxide and water without polluting the environment. Polylactic acid also has good mechanical properties, thermoplasticity, fiber formation, and high transparency. It is suitable for various processing methods such as blow molding, extrusion, and injection molding. It is easy to process and is defined by the industry as the most promising new type of packaging in the new century. Material. However, the mechanical properties and other properties of pure polylactic acid, such as thermal stability, barrier properties, solvent resistance, flame retardancy, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K9/06
Inventor 任杰董博
Owner TONGJI UNIV
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