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Thermoregulable shape memory polymer material and preparation method thereof

A polymer material and memory technology, which is applied in the fields of medical formula, medical science, surgery, etc., can solve the problems that limit the development of bio-applicable shape memory polymers, and it is difficult to find polymers, so that the shape memory performance can be adjusted and controlled. Variety of effects with low production costs

Inactive Publication Date: 2017-08-04
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This is mainly due to the fact that it is difficult to find polymers that can be directly melted and plasticized in commercial biocompatible materials with a glass transition temperature or a melting point near human body temperature, which greatly limits the preparation of bioapplicable shape memory through simple processing. polymer development

Method used

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  • Thermoregulable shape memory polymer material and preparation method thereof
  • Thermoregulable shape memory polymer material and preparation method thereof
  • Thermoregulable shape memory polymer material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] (1) Polyethylene oxide (Mw=8000, Aldrich) was selected as the shape memory stationary phase; w =5x10 4 g / mol, Changchun Institute of Applied Chemistry, China) as the shape memory reversible phase. The raw materials were placed in a vacuum oven and dried at 40 °C for 24 h to remove moisture before use.

[0040] (2) Mix the polyethylene oxide and polypropylene carbonate with a mass ratio of 1:3 and put them into the twin-screw extruder (see figure 1 ,A), adjust the temperature of each section of the extruder to be controlled at 80-125-140-140˚C respectively. After the material in the extruder is melted and plasticized, it flows out through the outlet die B of the rectangular channel, where the temperature of the outlet die B is about 140°C. After being pressed by a three-roll calender and pulled by a tractor, the sheet can be obtained. shape memory material. After calculation and testing, the glass transition temperature of the shape memory reversible phase polypropy...

Embodiment 2

[0045] (1) Polycaprolactone (6800, Perstorp Corp) was used as the shape memory stationary phase; polypropylene carbonate (Mw=2.48 x 105 g / mol, Changchun Institute of Applied Chemistry, China) was used as the shape memory reversible phase. The raw materials were placed in a vacuum oven and dried at 40 °C for 24 h to remove moisture before use.

[0046] (2) Mix the polycaprolactone and polypropylene carbonate with a mass ratio of 1:3 and put them into the twin-screw extruder (see figure 1 ,A), adjust the temperature of each section of the extruder to be controlled at 80-125-140-140˚C respectively. After the material in the extruder is melted and plasticized, it flows out through the outlet die B of the rectangular channel, where the temperature of the outlet die B is about 140°C. After being pressed by a three-roll calender and pulled by a tractor, the sheet can be obtained. shape memory material. After calculation and testing, the glass transition temperature of the shape mem...

Embodiment 3

[0051] (1) Polylactic acid (4032D, Natureworks Corp) was used as the shape memory stationary phase; polypropylene carbonate (Mw=2.48 x 105 g / mol, Changchun Institute of Applied Chemistry, China) was used as the shape memory reversible phase. The raw materials were placed in a vacuum oven and dried at 80°C and 40°C for 24 h to remove moisture before use.

[0052] (2) Mix the polylactic acid and polypropylene carbonate with a mass ratio of 1:1 and put them into the twin-screw extruder (see figure 1 , A), adjust the temperature of each section of the extruder to be controlled at 100-160-180-180˚C respectively. After the material in the extruder is melted and plasticized, it flows out through the outlet die B of the rectangular channel, where the temperature of the outlet die B is about 180°C, and then pressed by the three-roll calender and pulled by the tractor, the tablet can be obtained. shape memory material. After calculation and testing, the glass transition temperature of...

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Abstract

The invention discloses a thermoregulable shape memory polymer material and a preparation method thereof. The material is a blend, capable of achieving the shape memory property under the condition of a human body temperature, which is prepared through mixing biocompatible polypropylene carbonate and crystalline polymer evenly and carrying out melt plastification. The polypropylene carbonate as a shape memory reversible phase can deform after entering a rubber state at the human body temperature and is capable of effectively fixing a temporary shape after being cooled into a rigid glass state; and the crystalline polymer as a shape memory fixed phase is capable of serving as a physical crossing point to memorize the initial form of the material, and inhibiting molecular chain slippage of the polypropylene carbonate, thereby reducing irreversible deformation. The thermoregulable shape memory polymer material prepared through the preparation method has excellent and controllable shape memory property and good biocompatibility; the required raw materials are commercially available, so that the production cost is low; the preparation method is simple in process and high in production efficiency; and continuous mass production can be achieved.

Description

technical field [0001] The invention relates to the field of processing and manufacturing of polymer materials, in particular to a body temperature-responsive shape-memory polymer material and a preparation method thereof. Background technique [0002] Thermotropic shape memory materials refer to a class of materials that can return from a temporary shape to an initial set shape under the stimulation of changes in the external environment temperature. So far, thermotropic shape memory polymers have been widely used in many fields such as medical equipment, packaging, sensors, and aerospace. Among them, body temperature-responsive shape memory polymers for biological applications have become a research hotspot in recent years. [0003] According to the basic principle of shape memory, thermotropic shape memory polymers generally have a two-phase separated network structure, in which the shape memory fixed phase remembers the initial shape of the material, and the shape memor...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L71/02C08L67/04C08L67/02A61K47/34A61L31/06A61L31/14
CPCC08L69/00A61K9/0002A61K47/34A61L31/041A61L31/14A61L2300/602A61L2400/16C08L67/02C08L67/04C08L2201/06C08L2201/12C08L2203/02C08L2203/12C08L2203/16C08L71/02
Inventor 沈佳斌郑宇郭少云吉笑盈殷敏
Owner SICHUAN UNIV
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