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A kind of quantum dot modified PLA functional material and preparation method thereof

A functional material and quantum dot technology, applied in the field of plastic modification, can solve the problems of long degradation cycle and no research on hydrophilicity, and achieve the effect of good hydrophilicity, controllable degradation speed, and excellent mechanical properties

Active Publication Date: 2021-01-08
GUANGZHOU MEDICAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above method still does not solve the problem of its long degradation cycle, and its hydrophilicity has not been studied.

Method used

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  • A kind of quantum dot modified PLA functional material and preparation method thereof
  • A kind of quantum dot modified PLA functional material and preparation method thereof
  • A kind of quantum dot modified PLA functional material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A quantum dot modified PLA functional material, consisting of the following components in parts by mass: 89 parts of L-polylactic acid; 5 parts of poloxamer 188; 2 parts of nano-diamond quantum dots; diacetyl epoxidized fatty acid glycerol 2 parts of adipate; 2 parts of calcium oxide.

[0040] The preparation method of described quantum dot modified PLA functional material, comprises the steps:

[0041] After surface treatment, 2 parts of nano-diamond quantum dots and 2 parts of diacetyl epoxidized fatty acid glycerol adipate were mixed with 89 parts of L-polylactic acid, 5 parts of poloxamer 188 and 2 parts of calcium oxide. A twin-screw extruder with a ratio of 40:1 extruded and granulated to obtain a quantum dot modified PLA functional material; the parts are parts by mass. The temperature of the extruder is set at 60°C, 180°C, 180°C, 180°C, and the speed of the main machine is 300rpm.

Embodiment 2

[0043] A quantum dot modified PLA functional material, consisting of the following components in parts by mass: 66.9 parts of mesopolylactic acid; 25 parts of poloxamer 188; 0.1 part of CdSe quantum dots; diacetyl epoxidized fatty acid 5 parts of glycerol adipate; 3 parts of calcium oxide.

[0044] The preparation method of described quantum dot modified PLA functional material, comprises the steps:

[0045] After surface treatment, 0.1 part of CdSe quantum dots and 5 parts of diacetyl epoxidized fatty acid glycerol adipate were mixed with 66.9 parts of mesopolylactic acid, 25 parts of poloxamer 188 and 3 parts of calcium oxide. A twin-screw extruder with a diameter ratio of 40:1 extruded and granulated to obtain a quantum dot modified PLA functional material; the parts are parts by mass. The temperature of the extruder was set at 60°C, 140°C, 140°C, 140°C, and the speed of the main machine was 150rpm.

Embodiment 3

[0047] A quantum dot modified PLA functional material, consisting of the following components in parts by mass: 87.5 parts of D-polylactic acid; 10 parts of poloxamer 407; 1 part of CdSe quantum dots; diacetyl epoxidized fatty acid glycerin 1 part of adipate; 0.5 part of calcium oxide.

[0048] The preparation method of described quantum dot modified PLA functional material, comprises the steps:

[0049]After surface treatment, 1 part of CdSe quantum dots and 1 part of diacetyl epoxidized fatty acid glycerol adipate were mixed with 87.5 parts of D-polylactic acid, 10 parts of poloxamer 407 and 0.5 part of calcium oxide. A twin-screw extruder with a ratio of 40:1 extruded and granulated to obtain a quantum dot modified PLA functional material; the parts are parts by mass. The temperature of the extruder is set at 60°C, 180°C, 180°C, 180°C, and the speed of the main machine is 400rpm.

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Abstract

The invention discloses a quantum dot modified PLA functional material and a preparation method thereof, and belongs to the technical field of plastic modification. The quantum dot modified PLA functional material comprises, by mass, 50-98.8 parts of polylactic acid, 1-30 parts of poloxamer, 0.1-10 parts of quantum dots, 0-5 parts of a surface treatment agent and 0.1-5 parts of a water-absorbing acid scavenger. The PLA functional materials with different hydrophilicities can be prepared by selecting poloxamer with different HLB values, and the regulation of the degradation rate can be realizedby the hydrophilicity difference; and the quantum dots are added to prepare the PLA functional material having a tracing function in vivo and in vitro. The prepared modified PLA functional material emits fluorescence under the action of excitation, and has the advantages of quantum dot tracing function, good hydrophilic property and adjustable degradation rate.

Description

technical field [0001] The invention belongs to the technical field of plastic modification, and in particular relates to a quantum dot modified PLA functional material and a preparation method thereof. The modified PLA functional material has good hydrophilic performance, its degradation speed can be adjusted, and has a quantum dot tracer function . Background technique [0002] Polylactic acid (PLA) is a fully biodegradable synthetic polymer material with good biocompatibility and can be completely degraded in vivo without secondary surgery. It has been widely used in the fields of implantable medical devices and drug carriers. [0003] Compared with metal medical devices, polylactic acid is degradable in bone repair materials. Through formula regulation, devices and products with the same strength as human bone can be prepared, which can avoid secondary surgical removal and stress shielding. However, different configurations of polylactic acid (levorotatory, dextrorotat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L71/02C08K9/04C08K3/04C08K3/30C08K3/22
CPCC08K2003/2206C08K2201/011C08L67/04C08L2201/06C08L71/02C08K9/04C08K3/04C08K3/22C08K3/30
Inventor 阳范文蓝银涛徐蒙蒙李时悦陈涛周苗田秀梅陈晓明周卉周杨朱继翔王晗陈新度
Owner GUANGZHOU MEDICAL UNIV