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High-barrier property toughening polylactic acid film and preparation method thereof

A high-barrier, polylactic acid technology, applied in flexible coverings, climate sustainability, sustainable manufacturing/processing, etc., can solve the problems of polylactic acid gas barrier properties, slow crystallization rate, hindering applications, etc., to achieve extended Effects of gas permeation path, improvement of barrier properties, and improvement of compatibility

Active Publication Date: 2017-10-17
XIAMEN AMESON NEW MATERIAL INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, polylactic acid also has some obvious disadvantages: (1) due to the polarity of the main chain ester group and the steric hindrance of the side methyl groups, the polylactic acid has a large segment rigidity and poor impact resistance; (2) polylactic acid exists The problems of slow crystallization rate and many crystal defects further deteriorate its mechanical properties; (3) The gas barrier property of polylactic acid is poor, which hinders its application in packaging and other fields
However, nano-layered clay is easy to agglomerate, and its compatibility with the polymer matrix is ​​poor, so surface modification of nano-layered clay is required.

Method used

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  • High-barrier property toughening polylactic acid film and preparation method thereof
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  • High-barrier property toughening polylactic acid film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] This embodiment provides a high barrier toughened polylactic acid film, which is prepared according to the following steps:

[0048] Weigh 0.18 mol of magnesium chloride, 0.08 mol of aluminum chloride and 0.285 mol of urea and dissolve them in deionized water, then sonicate for 30 minutes, transfer them to a high-pressure reactor, and then put them in a muffle furnace at 180°C for 18 hours, and the reaction is over Afterwards, filter and wash to obtain LDHs powder.

[0049] Prepare 24mM TA aqueous solution and FeCl respectively 3 aqueous solution.

[0050] Weigh 0.05g of LDHs into 50ml of deionized water, sonicate for 45min, then add 0.5ml of TA aqueous solution, after fully adsorbed, then add 0.2ml of FeCl 3 The reaction solution was obtained from an aqueous solution, and after the reaction solution was rapidly reacted at room temperature for 1 min, it was filtered, centrifuged, washed, and freeze-dried to obtain LDHs@TA-Fe(Ⅲ) powder.

[0051] Disperse 0.042g of LDH...

Embodiment 2

[0054] This embodiment provides a high barrier toughened polylactic acid film, which is prepared according to the following steps:

[0055] Weigh 0.18 mol of magnesium chloride, 0.08 mol of zinc chloride, 0.13 mol of cerium chloride and 0.4095 mol of urea and dissolve them in deionized water, then sonicate for 20 minutes, transfer them to an autoclave, and then put them into a muffler at 120°C React in the furnace for 36 hours. After the reaction, filter and wash to obtain LDHs powder.

[0056] Prepare TA aqueous solution and FeCl with a concentration of 20mM respectively 3 aqueous solution.

[0057] Weigh 0.05g of LDHs into 50ml of deionized water, sonicate for 45min, then add TA aqueous solution (the concentration of TA in the reaction solution is 0.1g / L), after fully adsorbed, add FeCl 3 Aqueous solution (FeCl 3 The concentration in the reaction solution is 0.02g / L) to obtain a reaction solution, and after the reaction solution reacts rapidly at room temperature for 0.8m...

Embodiment 3

[0061] This embodiment provides a high barrier toughened polylactic acid film, which is prepared according to the following steps:

[0062] Weigh 0.2 mol of nickel chloride, 0.2 mol of zinc chloride, 0.1 mol of lanthanum chloride and 0.55 mol of urea and dissolve them in deionized water, then sonicate for 30 minutes, transfer them to an autoclave, and then put them in a 180°C React in a muffle furnace for 18 hours. After the reaction, filter and wash to obtain LDHs powder.

[0063] Prepare 25mM TA aqueous solution and FeCl respectively 3 aqueous solution.

[0064] Weigh 0.05g of LDHs into 50ml of deionized water, sonicate for 50min, then add TA aqueous solution (the concentration of TA in the reaction solution is 1g / L), after fully adsorbed, add FeCl 3 Aqueous solution (FeCl 3 The concentration in the reaction solution is 1 g / L) to obtain a reaction solution, and after the reaction solution reacts rapidly at room temperature for 1.5 min, it is filtered, centrifuged, washed,...

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Abstract

The invention provides a high-barrier property toughening polylactic acid film and a preparation method thereof, and relates to the field of high polymer materials. The preparation method comprises the following steps: preparing laminar double-hydroxyl metal oxides (LDHs) with a high-temperature hydrothermal method; dispersing the LDHs in water, adding a tannin solution, performing adsorption, further adding a ferric salt solution to obtain a reaction liquid, and rapidly obtaining modified LDHs (LDHS@TA-FE (III)); dispersing the modified LDHs in dimethyl formamide, adding polylactic acid, performing heating stirring dissolution, transferring into filming equipment, and performing drying filming; performing adsorption deposition and chelation on tannin (TA) and ferrous ions on the surfaces of the LDHs, thereby obtaining a core-shell structure of LDHs coated with Ta-Fe<3+>. The obtained polylactic acid film is remarkable in barrier property and toughening function, LDHS@TA-FE (III) and PLA (Polylactic Acid) are in good compatibility and play a relatively good interface function, and thus the use performance of PLA is improved.

Description

technical field [0001] The invention relates to the field of polymer materials, and in particular to a high-barrier toughened polylactic acid film and a preparation method thereof. Background technique [0002] Polylactic acid (PLA) material, as a fully biodegradable aliphatic polyester, has excellent biocompatibility and stiffness. This linear thermoplastic biodegradable aliphatic polyester uses starch extracted from corn, wheat, cassava and other plants as the initial raw material, and is decomposed by enzymes to obtain glucose, which is then fermented by lactic acid bacteria into lactic acid, and then chemically synthesized to obtain high Pure polylactic acid. PLA material has good mechanical strength, thermoplasticity, fibrillation and transparency, etc. It is suitable for various processing methods and is considered to be the most ideal substitute material for petroleum-based plastics. Polylactic acid prepared from lactic acid can be degraded into carbon dioxide and w...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08K9/12C08K9/10C08K7/00C08K3/22C08J5/18B65D65/46
CPCB65D65/466C08J5/18C08J2367/04C08K3/22C08K7/00C08K9/10C08K9/12C08K2201/011C08L2201/06C08L2201/14C08L2203/16C08L67/04Y02W90/10
Inventor 毛龙刘跃军吴慧青姚进陈剑洪
Owner XIAMEN AMESON NEW MATERIAL INC
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