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Method for preparing polypropylene material modified by polylactic acid

A technology of polypropylene material and polylactic acid, which is applied in the field of preparation of polypropylene film material, can solve problems such as adhesion on the surface of internal organs

Inactive Publication Date: 2010-05-26
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of material is placed in the abdominal cavity, which can cause serious adhesions to the visceral surface

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Surface oxidation of polypropylene flakes

[0023] Preparation of oxidant: take 2.0g of chromium trioxide, 2.0mL of concentrated sulfuric acid and 4.0mL of deionized water and place them in a two-necked flask to prepare oxidant (chromium trioxide+concentrated sulfuric acid+deionized water);

[0024] Preparation of pure polypropylene flakes: Take a known polypropylene mesh, cut it to a size of about 0.5cm×0.5cm, press it under heating conditions into a substantial polypropylene flake with a size of about 0.8cm×0.8cm, use excess Wash twice with acetone (magnetic stirring), each time for two hours, rinse with deionized water, dry in a drying oven (temperature < 85°C), save after drying and name it PP;

[0025] Take PP and put it into a 19# two-neck round bottom flask, and put a magnetic stirrer at the same time;

[0026] Put the above 19# two-neck round bottom flask into a 75°C methyl silicone oil bath (automatic temperature control, magnetic stirrer under the basin) for ...

Embodiment 2

[0035] Surface oxidation of polypropylene flakes

[0036] Preparation of oxidant: take 2.0g of chromium trioxide, 2.0mL of concentrated sulfuric acid and 4.0mL of deionized water and place them in a two-necked flask to prepare oxidant (chromium trioxide+concentrated sulfuric acid+deionized water);

[0037] Preparation of pure polypropylene flakes: Take a known polypropylene mesh, cut it to a size of about 0.5cm×0.5cm, press it under heating conditions into a substantial polypropylene flake with a size of about 0.8cm×0.8cm, use excess Wash twice with acetone (magnetic stirring), each time for two hours, rinse with deionized water, dry in a drying oven (temperature < 85°C), save after drying and name it PP;

[0038] Take PP and put it into a 19# two-neck round bottom flask, and put a magnetic stirrer at the same time;

[0039] Put the above 19# two-neck round bottom flask into a 75°C methyl silicone oil bath (automatic temperature control, magnetic stirrer under the basin) for ...

Embodiment 3

[0048] Surface oxidation of polypropylene flakes

[0049] Preparation of oxidant: take 2.0g of chromium trioxide, 2.0mL of concentrated sulfuric acid and 4.0mL of deionized water and place them in a two-necked flask to prepare oxidant (chromium trioxide+concentrated sulfuric acid+deionized water);

[0050] Preparation of pure polypropylene flakes: Take a known polypropylene mesh, cut it to a size of about 0.5cm×0.5cm, press it under heating conditions into a substantial polypropylene flake with a size of about 0.8cm×0.8cm, use excess Wash twice with acetone (magnetic stirring), each time for two hours, rinse with deionized water, dry in a drying oven (temperature < 85°C), save after drying and name it PP;

[0051]Take PP and put it into a 19# two-neck round bottom flask, and put a magnetic stirrer at the same time;

[0052] Put the above 19# two-neck round bottom flask into a 75°C methyl silicone oil bath (automatic temperature control, magnetic stirrer under the basin) for o...

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Abstract

The invention aims to provide a simple and feasible method for modifying the polypropylene surface to obtain specific biocompatibility, namely surface anti-blocking property. The method comprises the following steps: 1) heating and melting the polypropylene material, and pressing into slices (PP) with the thickness being 0.33mm; 2) placing the polypropylene slices in dichloromethane or acetone, heating, refluxing and washing for 24h to remove all additives, and drying in a baking oven; 3) placing the polypropylene slices after the above treatment in chromic acid solution in which the ratio of CrO3 to H2SO4 to H2O is 1:1:2, oxidizing for a certain time under the heating condition, taking out the polypropylene slices, washing by deionized water and fully drying (expressed as PP-COOH); and 4) placing the polypropylene slices after oxidizing treatment in 85% L-lactate water solution, reacting for a certain time under the catalytic action of a certain catalyst, taking out the polypropylene slices subjected to the above graft polymerization treatment, fully washing by dichloromethane and drying to obtain the demestic novel Rutkow composite material with simple process and economy and practicability.

Description

technical field [0001] The invention relates to a surface modification technology related to medical polypropylene materials, in particular to a preparation method of a polypropylene film material modified with polylactic acid. Background technique [0002] Polypropylene (PP) is one of the five general-purpose plastics today. Due to its rich source of raw materials, low price, easy processing and molding, the product has excellent comprehensive performance and has a wide range of uses. However, the relatively low surface energy and relatively high chemical resistance of polypropylene hinder its application as a functional material, especially when adhesion to other components, such as ink, metals, inorganic fillers, or other polymers, is required. [0003] Polypropylene as a new type of hernia repair began to be used clinically in the 1970s. The advantage of the polypropylene patch is that the woven mesh is larger, which is conducive to the growth of surrounding tissues and...

Claims

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Application Information

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IPC IPC(8): C08J7/16C08G63/08
Inventor 张天柱张文鹏张志刚花筱青任婧顾宁嵇振岭李俊生周雪锋江筱莉
Owner SOUTHEAST UNIV
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