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Preparation method of alginate-persimmon tannin composite material

A technology of alginate and composite materials, applied in the field of materials, to achieve the effect of good safety, short time consumption and abundant sources

Active Publication Date: 2015-01-28
桐乡市建春塑业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the research on alginate-persimmon tannin composite materials has not been reported yet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Crush immature natural persimmons through a 60-mesh sieve, add deionized water and enzyme with a mass fraction of 0.1‰, and perform ultrasonic extraction. The ultrasonic power is 80w, the ultrasonic time is 10min, the ultrasonic temperature is 30°C, the pH value of enzymatic hydrolysis is 5, and the ratio of solid to liquid The ratio is 1:5, and the treated extract is vacuum filtered and dried to obtain persimmon tannins. The enzyme is a mixture of cellulase and pectinase with a mass ratio of 1:1.

[0022] Add 10ml of sodium alginate solution with a concentration of 1wt% to 10ml of persimmon tannin solution with a concentration of 1wt%, stir evenly, adjust the pH value of the solution to 5, and obtain a sodium alginate / persimmon tannin blend solution. Add 1ml of calcium chloride solution with a concentration of 1wt% to the blended solution. After mixing and stirring, add 5ml of 1mol / L acetic acid solution dropwise to the composite solution. After stirring for 60min, tra...

Embodiment 2

[0025] Crush immature natural persimmons through a 60-mesh sieve, add deionized water and an enzyme with a mass fraction of 0.3‰, and perform ultrasonic extraction. The ultrasonic power is 100w, the ultrasonic time is 30min, the ultrasonic temperature is 40°C, the pH value of the enzymatic hydrolysis is 6, and the ratio of solid to liquid The ratio is 1:10, and the treated extract is vacuum filtered and dried to obtain persimmon tannins. The enzyme is a mixture of cellulase and pectinase with a mass ratio of 1:1.

[0026] Add 10ml calcium alginate solution with a concentration of 5wt% to 10ml persimmon tannin solution with a concentration of 8wt%, stir evenly, adjust the pH value of the solution to 6, and obtain a calcium alginate / persimmon tannin blend solution. Add 5ml of calcium chloride solution with a concentration of 2wt% to the blended solution. After mixing and stirring, add 10ml of 1mol / L acetic acid solution dropwise to the composite solution. After stirring for 100m...

Embodiment 3

[0028] Crush immature natural persimmons through a 60-mesh sieve, add deionized water and enzyme with a mass fraction of 0.5‰, and perform ultrasonic extraction. Ultrasonic power is 120w, ultrasonic time is 60min, ultrasonic temperature is 50°C, enzymatic hydrolysis pH value is 6, and the ratio of solid to liquid The ratio is 1:20, and the treated extract is vacuum filtered and dried to obtain persimmon tannins. The enzyme is a mixture of cellulase and pectinase with a mass ratio of 1:1.

[0029] Add 10ml of potassium alginate solution with a concentration of 5wt% to 10ml of persimmon tannin solution with a concentration of 10wt%, stir evenly, adjust the pH value of the solution to 7, and obtain a potassium alginate / persimmon tannin blend solution. Add 3ml of calcium chloride solution with a concentration of 5wt% to the blended solution. After mixing and stirring, add 10ml of 1mol / L acetic acid solution dropwise to the composite solution. After stirring for 120min, transfer it...

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Abstract

The invention relates to a preparation method of an alginate-persimmon tannin composite material. The preparation method comprises the following steps: firstly, preparing persimmon tannin by adopting an enzyme-ultrasonic wave assisted extraction method; secondly, adding an alginate liquid with the concentration of 0.1wt%-10wt% into a persimmon tannin liquid with the concentration of 0.1wt%-10wt% to obtain an alginate / persimmon tannin commixed liquid; and finally, adding calcium chloride and carrying out calcium ion cross-linking on the mixed liquid to obtain the alginate-persimmon tannin composite material. The preparation method adopts enzyme-ultrasonic wave assistance to extract tannin; and compared with a conventional solvent extraction method, high temperatures are not needed, the safety is good, the consumed time is short and the efficiency is high. The alginate-persimmon tannin composite material prepared by the preparation method has the advantages of good mechanical performance, regular tissue structure, high porosity, low cost, simple process, and good adsorption effect on heavy metal ions and the like.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a preparation method of an alginate-persimmon tannin composite material. Background technique [0002] With the rapid development of my country's economy and society, the continuous growth of the population, and the acceleration of industrialization and urbanization, industries involving heavy metal pollution are maintaining a strong growth momentum. Frequent incidents of heavy metal pollution have brought serious impact on the environment and people's health Serious damage has come, and the control of heavy metal pollution has become an urgent task. [0003] Heavy metal pollution refers to environmental pollution caused by heavy metals or their compounds. Heavy metals cannot be biodegraded, but they can be enriched tens of thousands of times under the biomagnification of the food chain, and finally enter the human body. Although some heavy metals such as manganes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30
CPCB01J20/24B01J20/3085B01J2220/4825
Inventor 赵兵
Owner 桐乡市建春塑业股份有限公司