Medical adhesives and preparation method thereof

A technology of adhesive and sodium alginate, which is applied in chemical modification and medical fields, can solve problems such as insufficient elasticity of organ surface tension, inapplicable tissue bonding, secondary risk of patients, etc., achieve shortened gel time, and the preparation method Convenience, Inexpensive Effects

Active Publication Date: 2016-02-17

莫秀梅 +1

5 Cites 31 Cited by

AI-Extracted Technical Summary

Problems solved by technology

However, α-cyanoacrylate adhesives are not suitable for tissue bonding in vivo because the bonding site is too hard, the elasticity of the surface tension of the organ is not enough, and formaldehyde will be generated after curing, which will cause inflammation. The mixt...

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Abstract

The invention relates to medical adhesives and a preparation method thereof. The adhesives are prepared from aldehyde sodium alginate and amination carboxymethyl chitosan. The preparation method includes the steps of mixing equal volumes of aldehyde sodium alginate solution with concentration of 10-50 wt% and amination carboxymethyl chitosan solution with concentration of 1-6 wt%, conducting a Schiff base reaction to form hydrogel, and obtaining the medical adhesives. Selected aldehyde sodium alginate and amination carboxymethyl chitosan are both natural biological materials, are free of toxin and odor, quite high in biological compatibility, low in price, safe, reliable, capable of being locally sprayed or injected to any part of a body in situ and low in cost, and is ideal substitute goods for fibrin glue sold on the market. The preparation method is simple.

Application Domain

Surgical adhesives

Technology Topic

ChemistrySchiff base +10

Examples

Experimental program(4)

Example Embodiment

[0033] Example 1

[0034] Accurately weigh 3.96g of sodium alginate and dissolve it in 400ml of deionized water to form a uniform solution. Dissolve 4.28 g of sodium periodate in a suitable amount of deionized water in the dark, and then add the sodium periodate solution dropwise to the uniform sodium alginate solution in the dark, and react for 4 hours in the dark at room temperature. The product was put into a dialysis bag (molecular weight cut-off of 14000) for 3 days and the water was changed every 4 hours.

[0035] Pour the product into a petri dish and pre-freeze it in a refrigerator at -80°C for 6 hours, then put it into a freeze dryer and freeze-dry to obtain aldehyde-based sodium alginate.

Example Embodiment

[0036] Example 2

[0037] Accurately weigh 5g of porcine gelatin and dissolve it in 100ml of aqueous solution, add 16ml of ethylenediamine, adjust the pH to 5.0, add 0.66g of water-soluble carbodiimide EDC, and react overnight at 37°C. After cooling to room temperature, put the product into a dialysis bag (with a molecular weight cut off of 3500) for 3 days and change the water every 4 hours. Pour the product into a petri dish and pre-freeze it in a refrigerator at -80°C for 6 hours, and then put it into a freeze dryer to obtain aminated carboxymethyl chitosan.

Example Embodiment

[0038] Example 3

[0039] The aldehydated alginic acid is formulated into a solution with a concentration of 30%. Accurately weigh the aminated carboxymethyl chitosan and prepare a 6% solution with deionized water. Use a 2ml syringe to take 1ml aminated carboxymethyl chitosan solution, and use a 2ml syringe to take 1ml aldehyde aldehyde sodium alginate solution. Connect the aminated carboxymethyl chitosan solution to the aldehyde group via a Y-type connection. Sodium alginate solution is injected into two pieces of 1cm×3cm pig skin by a needle at the same time, so that the two pieces of skin are bonded together, and the bonding strength is 10gfcm -2 , Gel time is 130 seconds.

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PUM

Property	Measurement	Unit
Viscosity	580.0	mPa·s
tensile		MPa
Particle size		Pa
strength	10

Description & Claims & Application Information

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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