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Method for preparing polycaprolactone and poly-L-lactic acid blend

A technology of L-polylactic acid and polycaprolactone, which is applied in the field of preparation of polycaprolactone and L-polylactic acid blends, can solve the problems of poor thermal deformation resistance, unsatisfactory hardness and strength, etc., and achieves easy operation. , good shape memory function, the effect of improving compatibility

Inactive Publication Date: 2018-03-23
SHAANXI SHENGMAI PETROLEUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low melting point of PCL, only about 60°C, the thermal deformation resistance is poor, and when it is used as a repair material, orthopedic fixation material and tissue engineering scaffold material in medicine, its hardness and strength cannot meet the requirements, so it is necessary Modification of PCL

Method used

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Embodiment Construction

[0012] A preparation method of a blend of polycaprolactone and L-polylactic acid, characterized in that: PLLA is placed in an electric drying oven to dry; PCL, PLLA and TBC are blended in a twin-screw extruder, and the screw speed 200r / min; adding 8g TBC per 100g PCL / PLLA blend; the resulting blend was granulated and dried, and then melted and pressed into thin sheets by a flat vulcanizer at 170°C.

[0013] A method for preparing a blend of polycaprolactone and L-polylactic acid according to the present invention, the mass fraction of the PLLA is 20%. The temperature of each section of the extruder from the barrel to the head is 130°C, 130°C, 140°C, 140°C and 140°C respectively. The thickness of the flakes is 1 mm. Described PCL selects 600C for use. The PLLA uses 1001. The drying temperature is 100° C., and the drying time is 3 hours. The PCL / PLLA blend without compatibilizer is a thermodynamically incompatible system. As the amount of PLLA increases, when the PCL is melt...

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PUM

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Abstract

A method for preparing a polycaprolactone and poly-L-lactic acid blend belongs to the field of material production. The method comprises the following steps: drying PLLA in an electrically-heated drying oven; blending PCL, the PLLA and TBC in a double screw extruder at a screw rotating speed of 200 r / min, wherein 8 g of the TBC is added to every 100 g of the PLC / PLLA blend; and granulating and drying the blend, and carrying out melt compression on obtained granules by a plate vulcameter at 170 DEG C to obtain slices. A mixture is prepared through improving a traditional process, and tributyl citrate is added to the mixture to improve the compatibility of the mixture, so the obtained material has a good shape memory function. The method for preparing the polycaprolactone and poly-L-lactic acid blend has the advantages of simple process, easiness in operation, and suitableness for being promoted and used.

Description

technical field [0001] The invention belongs to the field of material preparation, in particular to a method for preparing a blend of polycaprolactone and L-polylactic acid. Background technique [0002] With the rapid development of material technology and the advancement of medical technology, more and more new materials are used as repair materials in modern medicine. Polycaprolactone (PCL) is made of ε-caprolactone through ring opening A new type of polymer polymerized has many potential applications in biomedical engineering and other fields due to its excellent biodegradability, biocompatibility and processability. However, due to the low melting point of PCL, only about 60°C, the thermal deformation resistance is poor, and when it is used as a repair material, orthopedic fixation material and tissue engineering scaffold material in medicine, its hardness and strength cannot meet the requirements, so it is necessary Modification of PCL. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K5/11
CPCC08L67/04C08L2201/12C08L2205/025C08L2312/00C08K5/11
Inventor 王耀斌
Owner SHAANXI SHENGMAI PETROLEUM