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Preparation method of biodegradable polyester composite material

A technology for biodegradable polyester and composite materials, which is applied in the field of preparation of biodegradable polyester composite materials, can solve the problems of few research and application reports on ethylene terephthalate, and achieve improved biocompatibility, The effect of broad application prospects

Inactive Publication Date: 2004-12-22
CHANGCHUN SINOBIOMATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, there are few reports on the research and application of nano- or micro-hydroxyapatite and aromatic polyethylene terephthalate (PET) composite materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0034] Example 1: Grafting polylactide on the surface of hydroxyapatite under different catalyst dosages, the main preparation steps are as follows:

[0035]1) Under the protection of high-purity nitrogen, after drying 5g of nano-HAP crystal in a vacuum oven to remove water, add 10ml of xylene solvent and 0.025-0.5g of catalyst stannous octoate (as shown in Table 1) , after using a magnetic stirrer to stir for 30 minutes and an ultrasonic instrument to vibrate for 30 minutes, the suspension of hydroxyapatite-stannous octoate-xylene was placed in an oil bath at 110° C. and stirred for 2 hours;

[0036] 2) Under the protection of high-purity nitrogen, inject the suspension obtained in the previous step into a reaction flask in which 5 g of lactide xylene solution is dissolved with a syringe, stir at a constant temperature of 120°C for 24 hours, and then cool the reaction solution to room temperature;

[0037] 3) The reaction solution was settled with a centrifuge, and the precip...

example 2

[0040] Example 2: Preparation of PLA-g-HAP under different feeding ratios of lactide and hydroxyapatite.

[0041] 1) Under the protection of high-purity nitrogen, after drying 5g of nano-HAP crystal in a vacuum oven to remove water, add 10ml of xylene solvent and 0.5g of catalyst stannous octoate, and stir for 30 minutes with a magnetic stirrer After oscillating with an ultrasonic instrument for 30 minutes, put the suspension of hydroxyapatite-stannous octoate-xylene in an oil bath at 110°C and stir for 2 hours;

[0042] 2) Under the protection of high-purity nitrogen, inject the suspension obtained in the previous step into the reaction bottle with 0.25-5g of lactide xylene solution dissolved in it with a syringe, and stir at 120°C for 24 hours, then cool the reaction solution to room temperature ;

[0043] 3) Same as step 1) in Example 1. The grafting rate was tested by TGA, and the results are shown in Table 2.

[0044] NO

[0045] LA / HAP in the table refers to...

example 3

[0046] Example 3: Preparation of PLA-g-HAP at different catalyst and hydroxyapatite reaction temperatures.

[0047] 1) Under the protection of high-purity nitrogen, after drying 5g of nano-hydroxyapatite to remove water, add 10ml of xylene solvent and 0.25g of catalyst stannous octoate, stir with a magnetic stirrer for 30 minutes and vibrate with an ultrasonic instrument for 30 minutes, and then The hydroxyapatite-stannous octoate-xylene suspension was placed in an oil bath at different reaction temperatures of 80 to 130° C. (as shown in Table 3) and stirred for 120 minutes;

[0048] 2) The following steps are the same as the 2) and 3) steps in Example 1. The grafting rate was tested by TGA, and the results are shown in Table 3.

[0049] table 3

[0050] NO

[0051] Table T (C / H) is the reaction temperature between catalyst and hydroxyapatite, W 1 (%) refers to the percentage of the weight loss of the dried PLA-g-HAP in the range of 250-450° C. to the initial wei...

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Abstract

A process for preparing the biodegradable composite polyester material includes the open-loop polymerization between nano-hydroxypatite and lactide in a sealed reactor in the heating and stirring condition under protection of N2 or argon gas to graft the lactide to the hydroxy on the surface of nano-hydroxyapatite and mixing it with the biodegradable polyester. Its advantages are high biodegradability and biocompatibility and excellent machinability.

Description

technical field [0001] The invention relates to a preparation method of a biodegradable polyester composite material. Specifically, the hydroxyapatite particles are first grafted with polylactide, and then further compounded with the biodegradable polyester to prepare the biodegradable polyester composite material. material method. Background technique [0002] Usually fracture fixation materials are metal products made of stainless steel, titanium and their alloys. Due to the great difference between the rigidity of the cortical bone and the rigidity of the metal, the high-rigidity metal internal fixation device hinders the rapid formation of the skeleton around the fracture site and destroys it. The normal stress environment that the bone should withstand during the healing process, and the shielding and protection of the stress will lead to the formation of osteoporosis and bone atrophy, so after implantation in the body, a second surgery is required to remove it, and a c...

Claims

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Application Information

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IPC IPC(8): C08K9/04C08L67/00
Inventor 陈学思洪重奎邱雪宇景遐斌杨立新张栓明高占团
Owner CHANGCHUN SINOBIOMATERIALS
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