Gradient biocompatible polymer foaming material with opening structure and preparation method thereof

A technology of biocompatibility and open-cell structure, which is applied in the field of gradient biocompatible polymer foam materials and their preparation, can solve the problems of complicated operation, affecting performance, uneven distribution of cells in polymer materials, etc. , to achieve the effect of simplifying the process, uniform cells, and wide application

Active Publication Date: 2012-11-28
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The methods for preparing gradient foamed polymer materials with open-cell structure reported in the above two documents have the following disadvantages: 1. chemical porogens are added, and the shape, size and distribution of cells in the material are not related to the formation of porogens. The shape and dispersion of the porogen are closely related, because it is difficult to ensure the uniform dispersion of the porogen in the polymer material during the blending operation, which will lead to uneven distribution of cells in the polymer material; ②The removal of the porogen requires After repeated immersion in the solvent, the operation is complicated; ③The complete removal of the porogen cannot be guaranteed, and the residue of the porogen in the polymer material will affect its performance

Method used

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  • Gradient biocompatible polymer foaming material with opening structure and preparation method thereof
  • Gradient biocompatible polymer foaming material with opening structure and preparation method thereof
  • Gradient biocompatible polymer foaming material with opening structure and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] (1) Preparation of gradient parison

[0034]According to the mass ratio of polylactic acid (PLA): polymethyl methacrylate (PMMA) = 75: 25, polylactic acid (PLA): polymethyl methacrylate (PMMA) = 50: 50, weigh two groups of biocompatibility Polymers, the above two groups of biocompatible polymers were kneaded in a torque rheometer at normal pressure and 180 ℃ until the biocompatible polymers were mixed uniformly (8min), and two groups of biocompatible polymers with different compositions were obtained. Blend of compatible polymers.

[0035] The resulting two sets of blends of biocompatible polymers with different compositions were respectively molded on a press, and cooled rapidly in an ice-water bath to obtain two types of flakes with different mass ratios of PLA and PMMA and a thickness of 0.3 mm. Then two sheets of PLA and PMMA with different mass ratios are overlapped and molded into a flat gradient parison on a press. The molding temperature is 180°C and the holdin...

Embodiment 2

[0040] (1) Preparation of gradient parison

[0041] According to the mass ratio of polylactic acid (PLA): polymethyl methacrylate (PMMA) = 75: 25, polylactic acid (PLA): polymethyl methacrylate (PMMA) = 50: 50, weigh two groups of biocompatibility Polymer, at room temperature and normal pressure, the above two groups of biocompatible polymers were dissolved in dichloromethane and mixed evenly, then film was spread and vacuum-dried to constant weight at 50°C and -0.8MPa to obtain two groups with different compositions. The blend of biocompatible polymers, the amount of dichloromethane is limited to the complete dissolution of each group of biocompatible polymers.

[0042] The resulting two sets of blends of biocompatible polymers with different compositions were respectively molded on a press, and cooled rapidly in an ice-water bath to obtain two types of flakes with different mass ratios of PLA and PMMA and a thickness of 0.3 mm. Blend, and then two sheets of PLA and PMMA mas...

Embodiment 3

[0047] (1) Preparation of gradient parison

[0048] According to the mass ratio of polylactic acid (PLA): polymethyl methacrylate (PMMA) = 75: 25, polylactic acid (PLA): polymethyl methacrylate (PMMA) = 50: 50, weigh two groups of biocompatibility Polymers, the above two groups of biocompatible polymers were kneaded in a torque rheometer at normal pressure and 180 °C until the biocompatible polymers were mixed uniformly (8min), and two groups of different compositions were obtained. A blend of biocompatible polymers.

[0049] The resulting two sets of blends of biocompatible polymers with different compositions were respectively molded on a press, and cooled rapidly in an ice-water bath to obtain two types of flakes with different mass ratios of PLA and PMMA and a thickness of 0.3 mm. blend, and then overlap two pieces of PLA:PMMA=25:75 sheet-like blend, one piece of PLA:PMMA=50:50 sheet-like blend as follows: PLA:PMMA=25:75, PLA: PMMA = 50: 50, PLA: PMMA = 25: 75, placed on...

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Abstract

The invention provides a gradient biocompatible polymer foaming material with an opening structure, and the gradient biocompatible polymer foaming material comprises at least two biocompatible polymers, wherein the content of the biocompatible polymer in the foaming material as well as the cell size and aperture ratio of the foaming material change in gradient along the thickness direction of a flat shaped foaming material or the radial direction of a cylindrical foaming material. The preparation method of the gradient biocompatible polymer foaming material with the opening structure comprises the following steps of: preparing a gradient parison and foaming the gradient parison.

Description

technical field [0001] The invention belongs to the field of foaming polymers, in particular to a gradient biocompatible polymer foaming material with an open-pore structure and a preparation method thereof. Background technique [0002] Functionally graded material refers to the use of advanced composite technology in the preparation process to make the composition and structure of the material and other micro elements present a continuous or quasi-continuous gradient change in a specific direction, so that the macroscopic properties of the material are also continuous in a specific direction. Or a heterogeneous composite material with quasi-continuous gradient change. The polymer foam material with open-cell structure, because its cell structure is open, complex channels can be formed between the cells, and small molecule gases or fluids can flow through the channels, so it can be used as a separation and adsorption material, water absorption and Gas permeable materials, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/12B32B27/06B29C43/20B29C43/58B29C44/00B29C44/60A61K47/34A61K47/32A61L31/06A61L31/04A61L27/18A61L27/16A61L15/26A61L15/24B01J20/26B01J20/30
Inventor 廖霞何云川
Owner SICHUAN UNIV
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