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Biodegradable polylactic acid-based shape memory composite material and preparation method thereof

A composite material, polylactic acid-based technology, applied in the field of biodegradable polylactic acid-based shape memory composite material and its preparation, can solve the problems affecting the use of materials, difficulty in synthesis, high price, etc., and achieve good shape memory performance and good industrialization. Prospect, effect of simple preparation method

Active Publication Date: 2017-11-14
嘉兴高正新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyamide materials are highly water-absorbent, which may affect the dimensional stability of the material. In addition, polyamide elastomers or hyperbranched polyamide esters are difficult to synthesize, expensive, and not commonly used, which also limits their wide application.
Also used styrene-butadiene rubber and polylactic acid to prepare shape memory composite materials (Zhang H, Chen Z, Zheng Z, et al.Shape memory polymer hybrids of SBS / dl-PLA and their shape memory effects[J].Materials Chemistry and Physics , 2013, 137(3): 750-755.), but because PLA is a polar polymer and SBS is a non-polar polymer, PLA and SBS are incompatible systems, which affects the subsequent use of materials

Method used

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  • Biodegradable polylactic acid-based shape memory composite material and preparation method thereof
  • Biodegradable polylactic acid-based shape memory composite material and preparation method thereof
  • Biodegradable polylactic acid-based shape memory composite material and preparation method thereof

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Embodiment 1

[0028] This embodiment relates to a biodegradable polylactic acid-based shape memory composite material and a preparation method thereof, the method comprising the following steps:

[0029]Step 1, the ingredients are distributed according to the following parts: each component is as shown in Table 1, wherein the polylactic acid is 3,6-dimethyl-2,5-diketone-1,4 dioxane Polycondensation of hexane.

[0030] Step 2: put each component into a high-speed mixer and mix evenly, and blend at a temperature of 160°C, the blending is melt blending, and the blending method is extrusion, to obtain the Biodegradable polylactic acid-based shape memory composites.

[0031] Implementation effect: the obtained biodegradable polylactic acid-based shape memory composite material has an elongation at break of 6.5%, a tensile strength of 25.4MPa, a recovery rate of deformation of 86.4%, and a deformation fixation rate of 92.5%.

Embodiment 2

[0033] This embodiment relates to a biodegradable polylactic acid-based shape memory composite material and a preparation method thereof, the method comprising the following steps:

[0034] Step 1, the ingredients are distributed according to the following parts: each component is as shown in Table 1, wherein the polylactic acid is 3,6-dimethyl-2,5-diketone-1,4 dioxane Polycondensation of hexane.

[0035] Step 2, put each component into a high-speed mixer and mix evenly, and blend at a temperature of 165°C, the blending is melt blending, and the blending method is banburying, to obtain the Biodegradable polylactic acid-based shape memory composites.

[0036] Implementation effect: The elongation at break of the obtained biodegradable polylactic acid-based shape memory composite material is 57.2%, the tensile strength is 15.1 MPa, the deformation recovery rate is 94%, and the deformation fixation rate is 99%.

Embodiment 3

[0038] This embodiment relates to a biodegradable polylactic acid-based shape memory composite material and a preparation method thereof, the method comprising the following steps:

[0039] In step 1, each component is distributed according to the following parts: each component is shown in Table 1, wherein the polylactic acid is a polycondensate of lactic acid.

[0040] Step 2, put each component into a high-speed mixer and mix them evenly, and blend them at a temperature of 180°C, the blending is melt blending, and the blending method is open milling, to obtain the Biodegradable polylactic acid-based shape memory composites.

[0041] Implementation effect: The obtained biodegradable polylactic acid-based shape memory composite material has an elongation at break of 601.9%, a tensile strength of 2.2 MPa, a recovery rate of deformation of 92.3%, and a deformation fixation rate of 44%.

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Abstract

The invention discloses a biodegradable polylactic acid based shape memory composite material and a preparation method thereof. Environmentally renewable polylactic acid and a thermoplastic elastomer are adopted as the main raw materials, and are coordinated with various assistants, specifically, 40-80 parts (by weight) of polylactic acid, 19-55 parts of a thermoplastic elastomer, 0-15 parts of a compatibilizer, 0.1-10 parts of filler, and 0.1-1 parts of a stabilizer are blended to prepare the polylactic acid based shape memory composite material with the advantages of excellent mechanical properties and shape memory properties, environmental degradability and the like, and the composite material can be applied to biomedical equipment, microsystem components, biosensors and other fields.

Description

technical field [0001] The invention relates to the technical field of polymer processing, in particular to a biodegradable polylactic acid-based shape memory composite material and a preparation method thereof. Background technique [0002] Shape memory material refers to a product with an original shape, which can be changed by applying external force, and can be restored to its original shape under the treatment of external stimulus means such as heating, force, electromagnetic, and solvent. Shape memory polymer (Shape Memory Polymer) is a new type of functional polymer material, which has received extensive attention in the past 20 years. Shape memory polymer (SMP) has a high degree of deformation, a wide range of mechanical properties, and has the advantages of the polymer itself, such as low price, light weight and portability, and good processability. Polymers generally used in shape memory materials mainly include cross-linked polyethylene, polyurethane, polyester, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L53/02C08L23/16C08L23/08C08L51/06
Inventor 洪玉琢戚嵘嵘冯正明吴佳玮朱健冯杰
Owner 嘉兴高正新材料科技股份有限公司