Simple method for preparing polyimide film surface modified nano-hydroxyapatite coating

A technology of nano-hydroxyapatite and polyimide film, which is applied in the direction of coating, etc., can solve the problems of biocompatibility and limit wide application, and achieve the effect of fast reaction, mild reaction conditions and industrial production

Inactive Publication Date: 2011-04-27
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as an organic material, the biocompatibility problem of polyimide limits its wide application as a biomaterial in the medical field

Method used

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  • Simple method for preparing polyimide film surface modified nano-hydroxyapatite coating
  • Simple method for preparing polyimide film surface modified nano-hydroxyapatite coating
  • Simple method for preparing polyimide film surface modified nano-hydroxyapatite coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0019] (1) Take the polyimide film and cut it into 13x0.6cm strips, wash it with detergent, hydrochloric acid ethanol lotion, and water in sequence;

[0020] (2) soak the polyimide film after washing in 200mL0.05mol / L sodium hydroxide aqueous solution for 12 hours, then add 250mL0.2mol / L calcium hydroxide aqueous solution and let it stand for 6 hours, then add 50mL0.5mol / L diammonium hydrogen phosphate aqueous solution was left to react for 72 hours, keeping the pH of the reaction system = 8-14;

[0021] (3) Finally, the polyimide is taken out, rinsed and dried to obtain a polyimide film with a uniform surface and a surface-modified nano-hydroxyapatite coating. The scanning electron microscope photograph of the nano-hydroxyapatite coating modified on the surface of the obtained polyimide film is shown in figure 1 , X-ray diffraction pattern see figure 2 , and the EDS energy spectrum see image 3 .

Embodiment approach 2

[0023] (1) Take the polyimide film and cut it into 13x0.6cm strips, wash it with detergent, hydrochloric acid ethanol lotion, and water in sequence;

[0024] (2) soak and hydrolyze the polyimide film after washing in 200mL0.2mol / L aqueous potassium hydroxide solution for 5 hours, then add 250mL0.6mol / L calcium chloride aqueous solution and let it stand for 4 hours, then add 50mL1.8mol / L Potassium dihydrogen phosphate aqueous solution was left to react for 24 hours to keep the pH of the reaction system=8-14;

[0025] (3) Finally, the polyimide is taken out, rinsed and dried to obtain a polyimide film with a uniform surface and a surface-modified nano-hydroxyapatite coating. The scanning electron microscope photograph of the nano-hydroxyapatite coating modified on the surface of the obtained polyimide film is shown in figure 1 , X-ray diffraction pattern see figure 2 , and the EDS energy spectrum see image 3 .

Embodiment approach 3

[0027] (1) Take the polyimide film and cut it into 13x0.6cm strips, wash it with detergent, hydrochloric acid ethanol lotion, and water in sequence;

[0028] (2) Soak and hydrolyze the washed polyimide film in 200mL0.2mol / L aqueous potassium hydroxide solution for 6 hours, then add 250mL0.4mol / L calcium nitrate aqueous solution and let stand for 5 hours, then add 50mL1mol / L phosphoric acid The aqueous disodium hydrogen solution was left to react for 48 hours to keep the pH of the reaction system = 8-14;

[0029] (3) Finally, the polyimide is taken out, rinsed and dried to obtain a polyimide film with a uniform surface and a surface-modified nano-hydroxyapatite coating. The scanning electron microscope photograph of the nano-hydroxyapatite coating modified on the surface of the obtained polyimide film is shown in figure 1 , X-ray diffraction pattern see figure 2 , and the EDS energy spectrum see image 3 .

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Abstract

The invention relates to a simple method for preparing a polyimide film surface modified nano-hydroxyapatite coating. The method comprises the following steps: firstly, soaking a polyimide film in a strong alkali aqueous solution for 4-12 hours; secondly, adding a (Ca<2+>)-containing aqueous solution to react for 4-6 hours; and finally, adding a (PO4<3->)-containing aqueous solution to react for 24-72 hours so as to prepare the polyimide film surface modified nano-hydroxyapatite coating. The molar ratio of the (Ca<2+>) to (PO4<3->) which are added in a reaction system is 1.5-2. The reaction is carried out under mild conditions that the pressure is one atmospheric pressure, the temperature is 10-40 DEG C and the pH value is 8-14. The polyimide film surface modified nano-hydroxyapatite coating prepared by the invention has the characteristics of high purity, uniform dispersion and the like. The method provided by the invention has the advantages of low energy consumption, mild conditions and simple equipment in the whole preparation process, is easy to realize, is suitable for large-scale industrial production, and is wide in application prospect.

Description

technical field [0001] The invention belongs to the preparation field of material chemistry, in particular to a simple method for modifying the surface of a polyimide film with a nano-hydroxyapatite coating. Background technique [0002] Polyimide is a class of polymers characterized by imide rings. This type of polymer has excellent heat resistance, mechanical and dielectric properties, as well as good impact resistance, radiation resistance and solvent resistance. At present, all kinds of polyimide products have been widely used in electronics, automobiles, aerospace and other industries. In the field of biomedical materials, polyimide has also shown great potential in recent years, such as insulating materials for nerve electrodes. However, as an organic material, the biocompatibility problem of polyimide limits its wide application as a biomaterial in the medical field. [0003] As one of the inorganic materials, nano-hydroxyapatite has the same heat resistance, mechan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/12C08J7/06C08L79/08
Inventor 杨林王魁王华杰曹莹仉华姚文广
Owner HENAN NORMAL UNIV
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