PLA (polylactic acid)/MMT (montmorillonite) degradation enhanced master batch blending modification PLA/PBAT (polyethylene terephthalate-adipic acid-butanediol copolyester) composite material and preparation method thereof

A technology for enhancing masterbatch and composite materials, applied in the field of biodegradable materials, can solve the problems of poor compatibility between polylactic acid and montmorillonite, and poor intercalation effect, so as to improve intercalation effect, improve compatibility, The effect of excellent comprehensive performance

Inactive Publication Date: 2015-12-30
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the composite material is made by melting intercalation, the intercalation effect is poor, which makes the compatibility of polylactic acid and montmorillonite poor, and the performance of the composite material still needs to be further improved.

Method used

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  • PLA (polylactic acid)/MMT (montmorillonite) degradation enhanced master batch blending modification PLA/PBAT (polyethylene terephthalate-adipic acid-butanediol copolyester) composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] A PLA / MMT degradation-enhancing masterbatch blended modified PLA / PBAT composite material in this embodiment, the modified PLA / PBAT composite material is prepared by in-situ polymerization of the following raw materials in parts by weight:

[0038] 10 parts of PLA / MMT degradation enhancement masterbatch

[0039] Polylactic acid PLA63 parts

[0040] 27 parts of polyterephthalic acid-adipic acid-butylene glycol copolyester PBAT.

[0041] The PLA / MMT degradation enhancing masterbatch blending modified PLA / PBAT composite material described above is prepared by the following method, including the following steps:

[0042] (1) Take 100 parts of sodium montmorillonite and 3500 parts of deionized water to make a suspension of sodium montmorillonite, adjust the pH of the suspension to pH=6 with dilute hydrochloric acid and sodium hydroxide solution, and then Slowly add 40 parts of cetyltrimethylammonium bromide, 123 parts of isopropanol, and 1666 parts of deionized water, then ...

Embodiment 2

[0050] A PLA / MMT degradation-enhancing masterbatch blended modified PLA / PBAT composite material in this embodiment, the modified PLA / PBAT composite material is prepared by in-situ polymerization of the following raw materials in parts by weight:

[0051] 20 parts of PLA / MMT degradation enhancement masterbatch

[0052] Polylactic acid PLA56 parts

[0053] 24 parts of polyterephthalic acid-adipic acid-butylene glycol copolyester PBAT.

[0054] The PLA / MMT degradation enhancing masterbatch blending modified PLA / PBAT composite material described above is prepared by the following method, including the following steps:

[0055] (1) Take 100 parts of sodium montmorillonite and 3500 parts of deionized water to make a suspension of sodium montmorillonite, adjust the pH of the suspension to pH=6 with dilute hydrochloric acid and sodium hydroxide solution, and then Slowly add 40 parts of cetyltrimethylammonium bromide, 123 parts of isopropanol, and 1666 parts of deionized water to the...

Embodiment 3

[0062] A PLA / MMT degradation-enhancing masterbatch blended modified PLA / PBAT composite material in this embodiment, the modified PLA / PBAT composite material is prepared by in-situ polymerization of the following raw materials in parts by weight:

[0063] PLA / MMT Degradation Enhanced Masterbatch 30 parts

[0064] Polylactic acid PLA49 parts

[0065] 21 parts of polyterephthalic acid-adipic acid-butylene glycol copolyester PBAT.

[0066] The PLA / MMT degradation enhancing masterbatch blending modified PLA / PBAT composite material described above is prepared by the following method, including the following steps:

[0067] (1) Take 100 parts of sodium montmorillonite and 3500 parts of deionized water to make a suspension of sodium montmorillonite, adjust the pH of the suspension to pH=6 with dilute hydrochloric acid and sodium hydroxide solution, and then Slowly add 40 parts of cetyltrimethylammonium bromide, 123 parts of isopropanol, and 1666 parts of deionized water to the suspe...

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Abstract

The invention relates to a PLA (polylactic acid) / MMT (montmorillonite) degradation enhanced master batch blending modification PLA / PBAT (polyethylene terephthalate-adipic acid-butanediol copolyester) composite material and a preparation method thereof, belonging to the technical field of biodegradable materials. The method provided by the invention is characterized by taking PLA, PBAT and PLA / MMT degradation enhanced master batches as raw materials and uniformly mixing 10-90 parts of PLA, 10-90 parts of PBAT and 5-30 parts of PLA / MMT degradation enhanced master batches and then melting, blending and modifying PLA / PBAT to prepare the PLA / PBAT composite material with excellent performance, wherein the PLA / MMT degradation enhanced master batches are obtained by preparing organic MMT through ion exchange by using an intercalation agent and an intercalation assistant, increasing interlayer spacing among MMT and then intercalating monomer or polylactic acid molecular chains into the interlayer of MMT through melt in situ polymerization. The PLA / MMT degradation enhanced master batch blending modification PLA / PBAT composite material prepared by the method provided by the invention has excellent performance and can be used for production of daily supplies and packaging materials.

Description

technical field [0001] The invention belongs to the technical field of biodegradable materials, and in particular relates to a PLA / MMT degradation enhancing masterbatch blended modified PLA / PBAT composite material and a preparation method thereof. Background technique [0002] Polylactic acid (PLA) is a biodegradable polyester-based material. Lactic acid, the raw material for synthesizing polylactic acid, comes from natural crops such as corn. After being discarded, the product can be degraded into water and carbon dioxide in the natural environment. Therefore, polylactic acid is biodegradable and recyclable. In addition, it has good biocompatibility and mechanical properties. excellent. However, polylactic acid also has the disadvantages of brittleness and low impact strength. Improving the toughness of polylactic acid can broaden the application fields of polylactic acid. [0003] Usually, flexible polymers are introduced to improve the brittleness of polylactic acid by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08J3/22C08K9/04C08K3/34
Inventor 赵西坡林强彭少贤
Owner HUBEI UNIV OF TECH
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