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Chitosan/gelatin/nano-silver conductive antibacterial material and preparation method thereof

A biomaterial, nano-silver technology, applied in electrolytic coatings, nanotechnology, coatings, etc., can solve the problems of poor mechanical properties, uneven material surface, rough structure, etc., and achieve simple steps, simple preparation methods, and easy to control. Effect

Inactive Publication Date: 2014-12-24
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the deposition layer obtained by electrodeposition of chitosan is generally thinner and has poor mechanical properties, and because the cathode has H 2 The deposited layer often contains a large number of bubbles, which leads to uneven surface and rough structure of the material, and it is difficult to remove the deposited layer from the electrode completely.

Method used

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  • Chitosan/gelatin/nano-silver conductive antibacterial material and preparation method thereof
  • Chitosan/gelatin/nano-silver conductive antibacterial material and preparation method thereof
  • Chitosan/gelatin/nano-silver conductive antibacterial material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0039] A kind of chitosan / gelatin / nano-silver conductive antibacterial biological material, the preparation method is as follows:

[0040] 1) Preparation of nano-silver dispersion: weigh 0.19g NaBH 4 Add to 25mL deionized water, sonicate at room temperature for 5 minutes to get NaBH 4 Solution (concentration is 0.2mol / L), standby; Weigh 0.14g AgNO 3 Add to 200mL deionized water (concentration is 4mmol / L), stir and dissolve at room temperature, then add to the obtained AgNO 3 Add 0.06g of sodium citrate to the solution, and then add NaBH dropwise to the solution at a rate of 2 drops / second under constant temperature magnetic stirring at 25°C. 4 Solution, stop dripping until the solution turns yellowish brown, continue to stir and react for 8 hours; then centrifuge the reacted solution, wash the precipitate with ethanol and acetone for 3 times, and dry it in vacuum at 40°C for 10h to obtain nano-silver; 2.0 ×10 -2 Add 1 g of nano silver into 10 mL of distilled water, and son...

Embodiment 2

[0050] A kind of chitosan / gelatin / nano-silver conductive antibacterial biological material, the preparation method is as follows:

[0051] 1) Preparation of nano-silver dispersion: weigh 0.15g NaBH 4 Add to 20mL deionized water, sonicate at room temperature for 3 minutes to get NaBH 4 Solution (concentration is 0.2mol / L), standby; Weigh 0.1gAgNO 3 Add to 100mL deionized water (concentration is 5mmol / L), stir and dissolve at room temperature, then add to the obtained AgNO 3 Add 0.05g of sodium citrate to the solution, and then add NaBH dropwise to the solution at a rate of 3 drops / second under constant temperature magnetic stirring at 20°C. 4 Solution, stop dripping until the solution turns yellowish brown, continue to stir and react for 6 hours; then centrifuge the reacted solution, wash the precipitate with ethanol and acetone twice, and dry it in vacuum at 35°C for 15h to obtain nano-silver; ×10 -3 Add nanometer silver into 15mL distilled water, ultrasonic 20 minutes, ob...

Embodiment 3

[0059] A kind of chitosan / gelatin / nano-silver conductive antibacterial biological material, the preparation method is as follows:

[0060] 1) Preparation of nano-silver dispersion: weigh 0.15g NaBH 4 Add to 40mL deionized water, sonicate at room temperature for 8 minutes to get NaBH 4 Solution (concentration is 0.1mol / L), standby; Weigh 0.15g AgNO 3 Add to 300mL deionized water (concentration is 3mmol / L), stir and dissolve at room temperature, then add to the obtained AgNO 3 Add 0.07g of sodium citrate to the solution, and then add NaBH dropwise to the solution at a rate of 4 drops / second under constant temperature magnetic stirring at 30°C. 4 Solution, stop dripping until the solution turns yellowish brown, continue to stir and react for 10 hours; then centrifuge the reacted solution, wash the precipitate with ethanol and acetone 4 times, and dry it in vacuum at 45°C for 8h to obtain nano-silver; 5.0 ×10 -2 Add 1 g of nano silver into 10 mL of distilled water, and ultraso...

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Abstract

The invention relates to a chitosan / gelatin / nano-silver conductive antibacterial material and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a chitosan solution; (2) preparing an electro-deposition liquid; and (3) preparing the chitosan / gelatin / nano-silver conductive antibacterial material, namely immersing a titanium alloy plate serving as a negative pole and a platinum plate serving as a positive pole in the electro-deposition liquid prepared in the step (2), taking out and washing the titanium alloy plate with a deposition layer after electro-deposition is completed, then immersing in a 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride aqueous solution of which the concentration is 0.05-0.20mol / L, and carrying out post-treatment at the end of the reaction to obtain the chitosan / gelatin / nano-silver conductive antibacterial material. The preparation method is simple and convenient to operate and easy to control, and has the characteristics of simple equipment, mild reaction condition and the like; the prepared material has excellent biocompatibility and biodegradability and has conductive performance and excellent antibacterial activity.

Description

technical field [0001] The invention relates to the preparation of biological materials, in particular to a chitosan / gelatin / nano-silver conductive antibacterial biological material and a preparation method thereof. Background technique [0002] Electrodeposition technology provides a new method for constructing functional film materials on the surface of conductive materials, which has potential application value in many technical fields [Soft matter, 2013, 9(9): 2703-2710]. Compared with the traditional technology, the electrodeposition technology is simple and easy to operate, and the preparation conditions are mild, and the performance of the deposited film can be adjusted by changing the deposition voltage, deposition time, deposition solution concentration, etc., and has time and space selectivity. Chitosan is the deacetylation product of chitin, which has good biocompatibility and biodegradability, and is widely used in the field of biomedicine. In addition, chitosan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D15/00B82Y40/00
Inventor 王艺峰郭雪成潘瑞浩韩笛陈涛郭萌萌耿增华
Owner WUHAN UNIV OF TECH
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