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Polylactic acid modified shape memory intelligent deformation material and preparation method thereof

A deformation material and polylactic acid technology, applied in the field of deformation material preparation, can solve the problems of difficult film formation and poor impact resistance, achieve high mechanical strength and rapid deformation ability, improve processing efficiency, and break through mechanical strength and deformation. The effect of characteristics that are difficult to improve together

Active Publication Date: 2019-08-06
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, polylactic acid is brittle, has poor impact resistance, and is difficult to form a film.

Method used

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  • Polylactic acid modified shape memory intelligent deformation material and preparation method thereof
  • Polylactic acid modified shape memory intelligent deformation material and preparation method thereof
  • Polylactic acid modified shape memory intelligent deformation material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] 1) Preparation of polylactic acid modified material slurry:

[0031] The composition of polylactic acid modified material slurry: polylactic acid is used as the main material of shape memory intelligent deformation, granular polyetheretherketone is used as the modified material for performance enhancement, and dichloromethane is used as the solvent. Weigh the polylactic acid powder and polyether ether ketone powder in proportion, wherein the mass percentage of polylactic acid powder is 65wt.%-95wt.%, preferably 70wt.%-90wt.%, and the mass percentage of polyetheretherketone powder is 5wt.%-35wt. %, preferably 10wt.%-30wt.%, the mass percentage of evenly mixed powder and dichloromethane solvent is 1:5.

[0032] Ingredients: Weigh the polylactic acid powder and polyetheretherketone powder according to the ingredient ratio in a, and ball mill the weighed powder in a ball mill with a rotation speed of 100r / min-140r / min for 5h-6h to make it evenly mixed . The uniformly mixe...

Embodiment 1

[0037] Polylactic acid sample preparation:

[0038] Weigh 5 g of polylactic acid powder respectively, and ball mill and mix the weighed powder in a formal ball mill with a rotating speed of 100 r / min for 6 hours to make them evenly mixed. The uniformly mixed powder was mixed with 25 g of dichloromethane solvent, and stirred with a magnetic stirrer at room temperature for 3 hours to obtain a shape memory polymer suspension with relatively high viscosity. Put the prepared shape-memory polymer suspension into the syringe barrel, remove the air bubbles in the syringe, inject 3ml of the polymer suspension into the mold, scrape it flat, and place it at 25°C for 0.5h to form a film. Repeat this process 5 times to prepare a rectangular sheet with a size of 50mm×10mm×1mm, see figure 1 shown.

Embodiment 2

[0040] 90% polylactic acid 10% polyether ether ketone modified polylactic acid sample preparation:

[0041]Weigh 4.5g of polylactic acid powder and 0.5g of polyether ether ketone powder respectively, and ball mill and mix the weighed powders in a formal ball mill with a rotation speed of 100r / min for 6h to make them evenly mixed. The uniformly mixed powder was mixed with 25 g of dichloromethane solvent, and stirred with a magnetic stirrer at room temperature for 3 hours to obtain a shape memory polymer suspension with relatively high viscosity. Put the prepared shape-memory polymer suspension into the syringe barrel, remove the air bubbles in the syringe, inject 5ml of the polymer suspension into the mold, scrape it flat, and place it at 25°C for 0.5h to form a film. Repeat this process 5 times to prepare a rectangular sheet with a size of 50mm×10mm×1mm, see figure 2 shown.

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Abstract

The invention discloses a polylactic acid modified shape memory intelligent deformation material and a preparation method thereof. The method is based on the structural design convenience and the material forming efficiency of a mold. Polylactic acid is used as a shape memory intelligent deformation main material, granular poly(ether-ether-ketone) is adopted as a performance enhancing modifying material, and dichloromethane is adopted as a solvent. The material is prepared through layer-by-layer stacking to control the shape and dimension of a sample. Through adjusting changes of poly(ether-ether-ketone) contents of different layers in a molding process, the shape memory intelligent deformation behavior and mechanical strength of the material can be effectively controlled, thus achieving improvement in low strength and poor deformation performance of the polylactic acid. The prepared material shows good deformation functions and mechanical performance, and is light in weight, low in production cost, simple in preparation process and wide in application range.

Description

technical field [0001] The invention relates to the technical field of preparation of deformation materials, in particular to a polylactic acid modified shape memory intelligent deformation material and a preparation method thereof. [0002] technical background [0003] Polylactic acid is a polymer made from raw materials proposed by renewable plant resources. The source of raw materials is sufficient and renewable. The production process of polylactic acid is pollution-free and has good biodegradability. It is recognized as an environmentally friendly material. , is an ideal green polymer material. Polylactic acid has good mechanical and physical properties. It is suitable for various processing methods such as blow molding and thermoplastic. It is easy to process and widely used. The market prospects of various plastic products from industry to civilian use good. Polylactic acid has shape memory properties and can sense and respond to temperature changes. It can be given ...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L61/16C08J3/00
CPCC08J3/005C08J2367/04C08J2461/16C08L67/04C08L2201/12C08L61/16
Inventor 梁云虹张澜林兆华刘庆萍张志辉
Owner JILIN UNIV
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