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Polycaprolactone composite material and preparation method thereof

A technology of polycaprolactone and composite materials, applied in the field of biodegradable polymer materials, can solve the problems of affecting the mechanical properties of materials, affecting the biocompatibility and degradability of polycaprolactone, cumbersome process steps, etc., and achieve excellent mechanical properties. performance, improved mechanical properties and rheological behavior, the effect of a simple process

Inactive Publication Date: 2018-06-26
HUBEI GUANGHE BIO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Patent CN104275883A discloses a nanofiber-reinforced polylactic acid / polycaprolactone composite material and its preparation method. The polylactic acid / polycaprolactone blend fiber is combined with the polycaprolactone matrix. When polylactic acid / polycaprolactone When the caprolactone blend fiber and the polycaprolactone matrix are combined by heat and pressure at a temperature higher than the melting point of polycaprolactone but lower than the melting point of polylactic acid, the polycaprolactone component on the fiber surface will bond with the matrix polycaprolactone. Ester fusion, the prepared composite material has good mechanical strength, but the main polylactic acid / polycaprolactone blend is electrospun to make fiber-reinforced polycaprolactone, the process is cumbersome and complicated
Patent CN101693773A uses acorn powder to enhance and modify polycaprolactone, but the addition of acorn powder affects the biocompatibility and degradability of polycaprolactone, which limits its application field
Invention patent CN1593673A adopts melt blending or molding method to reinforce polycaprolactone with chitin fibers, but the traditional melt blending process needs to be carried out at a temperature higher than the melting point of the polymer, and the strong shear force and high temperature of the screw will cause Partial degradation of polycaprolactone, thus affecting the mechanical properties of the material
Patent CN101974212B discloses polycaprolactone / calcium sulfate composite material and its preparation method, but the process needs to introduce other non-degradable substances and the process steps are cumbersome
However, the use of stereocomplexed polylactic acid to reinforce polycaprolactone and improve its mechanical properties has not been reported.

Method used

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  • Polycaprolactone composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 100 parts by weight of polycaprolactone with a weight-average molecular weight of 50,000 and 3 parts by weight of poly-L-lactic acid with a weight-average molecular weight of 100,000 into an internal mixer, and mix for 10 minutes at 165°C and 80 rpm , and then under the same conditions, add 7 parts by weight of poly(D-lactic acid) with a weight average molecular weight of 100,000 and mix for 20 minutes. The composite materials were tested by tensile mechanics, melt index and DSC. The results are shown in Table 1.

Embodiment 2

[0025] Add 100 parts by weight of polycaprolactone with a weight-average molecular weight of 50,000 and 14 parts by weight of poly-L-lactic acid with a weight-average molecular weight of 20,000 into an internal mixer, and mix for 15 minutes at 165°C and 80 rpm , and then under the same conditions, add 6 parts by weight of poly(D-lactic acid) with a weight average molecular weight of 20,000 and mix for 15 minutes. The composite materials were tested by tensile mechanics, melt index and DSC. The results are shown in Table 1.

Embodiment 3

[0027] Add 100 parts by weight of polycaprolactone with a weight-average molecular weight of 50,000 and 24 parts by weight of poly-L-lactic acid with a weight-average molecular weight of 200,000 into an internal mixer, and mix for 12 minutes at 165°C and 80 rpm , and then under the same conditions, add 16 parts by weight of poly(D-lactic acid) with a weight average molecular weight of 50,000 and mix for 18 minutes. The composite materials were tested by tensile mechanics, melt index and DSC. The results are shown in Table 1.

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Abstract

The invention discloses a polycaprolactone composite material and a preparation method thereof. The stereocomplex polylactic acid enhanced polycaprolactone composite material comprises 100 parts by weight of polycaprolactone, and 10-40 parts by weight of stereocomplex polylactic acid, wherein the stereocomplex polylactic acid comprises 30-70 parts by weight of poly L-lactic acid and 30-70 parts byweight of poly D-lactic acid. The stereocomplex polylactic acid is blended with the polycaprolactone, so that the mechanical properties of a pure polycaprolactone resin are enhanced, and the crystallization behavior and rheological properties can be effectively regulated. According to the polycaprolactone composite material and the preparation method thereof, the raw materials are easy to obtain,the process is simple, and a two-step melt blending method is adopted, so that introduction of non-degradable materials such as chain extender is avoided, and the mechanical properties of the pure polycaprolactone resin are enhanced without introducing other non-degradable substances, therefore, the formed polycaprolactone composite material has excellent biodegradability.

Description

technical field [0001] The invention belongs to the technical field of biodegradable polymer materials. The invention relates to a preparation method of a stereocomplex polylactic acid reinforced polycaprolactone composite material. Background technique [0002] Biodegradable plastics refer to a class of plastics that are degraded by the action of naturally occurring microorganisms such as bacteria, molds (fungi) and algae. The ideal biodegradable plastic is a polymer material that has excellent performance, can be completely decomposed by environmental microorganisms after being discarded, and is finally inorganicized to become an integral part of the carbon cycle in nature. Polycaprolactone (PCL) is one of the most widely used aliphatic polyesters. It has a wide range of sources and is reliable. It can often be modified or blended with other materials to meet the requirements of different uses and overcome the defect of low melting point. . Polycaprolactone is a linear ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04
CPCC08L67/04C08L2201/06C08L2205/025
Inventor 谢招旺韩常玉
Owner HUBEI GUANGHE BIO TECH