Experimental analysis of adhesive strength of modified bone adhesive
2019-02-21 04:11:55
2.2.2 Effect of Alkaline Solution Temperature on Apparent Viscosity
The effect of alkaline hydrolysis temperature on viscosity is shown in Figure 1.
It can be seen from Figure 1 that the alkaline hydrolysis temperature is lower than 50 °C, the bone glue is not fully decomposed under alkaline conditions, resulting in gel; above 50 °C, with the increase of temperature, the alkaline hydrolysis of bone glue molecules is exacerbated. After the chain is broken, smaller and smaller molecules are formed, the viscosity gradually decreases, and the initial viscosity of the glue gradually deteriorates. Therefore, it is optimum when the alkaline hydrolysis temperature is 60°C.
2.2.3 Effect of NaOH Addition on Apparent Viscosity
The effect of the amount of NaOH added on the viscosity is shown in FIG.
As can be seen from Figure 2, the amount of NaOH added has a great influence on the adhesive viscosity. If the amount of alkali is too low and less than 1.1 g, the bone gelatin macromolecules cannot release the peptide bond and release the appropriate size of the bone glue molecule. The macromolecule will cause the gel in the subsequent reaction; Most of the bone glue molecules are broken down into small molecules, and the molecular weight is too small, resulting in a drop in viscosity.
2.2.4 Effect of alkaline hydrolysis time on apparent viscosity
The effect of alkali hydrolysis time on viscosity is shown in Figure 3.
As can be seen from Figure 3: the alkaline hydrolysis time should not be too long or too short, alkaline hydrolysis below 10min, the reaction gel. The short time alkali hydrolysis reaction is not sufficient to decompose the bone glue macromolecules into small molecules within a certain molecular weight range, so the viscosity is low and the adhesion performance is poor; over time, alkali hydrolysis is excessively severe, and the peptide chain is broken into too small The molecule has a small molecular weight and the viscosity of the gum decreases. Therefore, the alkaline hydrolysis time is controlled to be about 30 minutes. (to be continued)
The effect of alkaline hydrolysis temperature on viscosity is shown in Figure 1.
It can be seen from Figure 1 that the alkaline hydrolysis temperature is lower than 50 °C, the bone glue is not fully decomposed under alkaline conditions, resulting in gel; above 50 °C, with the increase of temperature, the alkaline hydrolysis of bone glue molecules is exacerbated. After the chain is broken, smaller and smaller molecules are formed, the viscosity gradually decreases, and the initial viscosity of the glue gradually deteriorates. Therefore, it is optimum when the alkaline hydrolysis temperature is 60°C.
2.2.3 Effect of NaOH Addition on Apparent Viscosity
The effect of the amount of NaOH added on the viscosity is shown in FIG.
As can be seen from Figure 2, the amount of NaOH added has a great influence on the adhesive viscosity. If the amount of alkali is too low and less than 1.1 g, the bone gelatin macromolecules cannot release the peptide bond and release the appropriate size of the bone glue molecule. The macromolecule will cause the gel in the subsequent reaction; Most of the bone glue molecules are broken down into small molecules, and the molecular weight is too small, resulting in a drop in viscosity.
2.2.4 Effect of alkaline hydrolysis time on apparent viscosity
The effect of alkali hydrolysis time on viscosity is shown in Figure 3.
As can be seen from Figure 3: the alkaline hydrolysis time should not be too long or too short, alkaline hydrolysis below 10min, the reaction gel. The short time alkali hydrolysis reaction is not sufficient to decompose the bone glue macromolecules into small molecules within a certain molecular weight range, so the viscosity is low and the adhesion performance is poor; over time, alkali hydrolysis is excessively severe, and the peptide chain is broken into too small The molecule has a small molecular weight and the viscosity of the gum decreases. Therefore, the alkaline hydrolysis time is controlled to be about 30 minutes. (to be continued)
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