Preparation method of antibacterial hydrogel

A hydrogel and hemicellulose technology, which is applied in the field of antibacterial hydrogel preparation, can solve the problem that it is difficult to apply antibacterial hydrogel to hemicellulose raw materials, and achieve excellent antibacterial effect, low energy consumption, and low reaction temperature conditions Effect

Active Publication Date: 2014-09-17
BEIJING FORESTRY UNIVERSITY
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to propose a preparation method of antibacterial hydrogel, to solve the problem that there is no method for preparing antibact...

Method used

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  • Preparation method of antibacterial hydrogel
  • Preparation method of antibacterial hydrogel
  • Preparation method of antibacterial hydrogel

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Embodiment 1

[0025] In the first step, add 1g of sodium periodate and 2g of hemicellulose into 10ml of water, stir until completely dissolved, add NaOH solution to adjust the pH value to neutral, and stir in a 37°C water bath for 12h. After the reaction is completed, the mixed solution is centrifuged, washed with water for 3 times, and dried to obtain dialdehyde hemicellulose;

[0026] Second step, 1g chitosan is dissolved in the acetic acid solution of 2v / v%, stirs until dissolving completely, obtains the chitosan solution of 5wt%;

[0027] In the third step, 1 g of dialdehyde hemicellulose is dissolved in water, stirred and centrifuged to obtain a suspension of 5 wt % dialdehyde hemicellulose;

[0028] The fourth step is to mix the dialdehyde hemicellulose solution with the chitosan solution, adjust the pH value to neutral, place the mixed solution in a 45°C water bath and stir for 10 hours, then continue to heat up to 90°C for 60 minutes, and obtain water after cooling A mixture of gel...

Embodiment 2

[0034] In the first step, add 1g of sodium periodate and 2g of hemicellulose into 10ml of water, stir until completely dissolved, add NaOH solution to adjust the pH value to neutral, and stir in a 37°C water bath for 12h. After the reaction is completed, the mixed solution is centrifuged, washed with water for 3 times, and dried to obtain dialdehyde hemicellulose;

[0035] Second step, 0.5g chitosan is dissolved in the acetic acid solution of 1v / v%, stirs until dissolving completely, obtains the chitosan solution of 2wt%;

[0036] In the third step, 2g of dialdehyde hemicellulose is dissolved in water, stirred and centrifuged to obtain a 10wt% suspension of dialdehyde hemicellulose;

[0037] The fourth step is to mix the dialdehyde hemicellulose solution with the chitosan solution, adjust the pH value to neutral, place the mixed solution in a 45°C water bath and stir for 10 hours, then continue to heat up to 90°C for 60 minutes, and obtain water after cooling A mixture of gel...

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Abstract

The invention discloses a preparation method of an antibacterial hydrogel. The preparation method comprises the following steps: step 1, oxidizing active hydroxyl in hemicellulose into an aldehyde group by using an oxidant to obtain dialdehyde hemicellulose; step 2, enabling an excessive dialdehyde hemicellulose solution to react with a chitosan solution, and forming a mixture of the hydrogel and remained dialdehyde hemicellulose; and step 3, soaking the mixture into a solution containing silver ions to ensure that silver particles are adsorbed on the surface of a hydrogel network structure, thus preparing the antibacterial hydrogel. By adopting the method disclosed by the invention, hemicellulose is modified by using the oxidant and is provided with a functional group, so that hemicellulose is beneficial for performing a Schiff base reaction with an amino group in chitosan. The preparation method of the antibacterial hydrogel is low in reaction temperature condition and low in energy consumption, and is easy to put into industrial production. In addition, the silver particles adsorbed by the prepared antibacterial hydrogel reach nano-level and have excellent antibacterial effects.

Description

technical field [0001] The invention relates to the technical field of antibacterial hydrogel preparation, in particular to a method for preparing antibacterial hydrogel by using hemicellulose. Background technique [0002] With the development of my country's industrialization and the improvement of people's living standards, people's consumption of energy and demand for synthetic materials are increasing rapidly, while conventional energy sources such as coal, oil and natural gas have limited content, and petrochemical-based synthetic materials are difficult to biodegrade. The environment on which human beings depend has caused serious pollution. Therefore, the development and utilization of clean and renewable resources has become the primary choice and inevitable trend. Biomass resources have many advantages such as renewability, abundant resources and environmental friendliness. As a biomass resource, hemicellulose has a high natural stock, is renewable, non-toxic, and...

Claims

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Application Information

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IPC IPC(8): C08J7/00C08J3/075C08L5/14C08L5/08C08B37/14
Inventor 彭锋关莹孙润仓任俊莉张冰亓宪明
Owner BEIJING FORESTRY UNIVERSITY
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