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A kind of zinc hydroxystannate/carboxymethyl chitosan hybrid antibacterial agent and preparation method thereof

A technology of carboxymethyl chitosan and carboxymethyl chitosan, which is applied in the field of hybrid material preparation, can solve problems such as poor durability, easy decomposition, and poor thermal stability, and achieve simple steps, low production costs, and mild reaction conditions Effect

Active Publication Date: 2015-07-29
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this type of organic antibacterial agent also has some shortcomings, such as poor thermal stability (can only be used below 300 ° C), easy to decompose, and poor persistence.

Method used

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  • A kind of zinc hydroxystannate/carboxymethyl chitosan hybrid antibacterial agent and preparation method thereof
  • A kind of zinc hydroxystannate/carboxymethyl chitosan hybrid antibacterial agent and preparation method thereof
  • A kind of zinc hydroxystannate/carboxymethyl chitosan hybrid antibacterial agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh 0.1438g (5×10 -4 mol) Zinc sulfate heptahydrate, 0.1063g sodium stannate, 0.143g carboxymethyl chitosan (molecular weight 10000) were placed in a 250mL reactor, 100ml distilled water was added, and the reaction was stirred for 5h, and the reaction temperature was controlled at 0°C. After filtering and drying, the obtained product is zinc hydroxystannate / carboxymethyl chitosan hybrid antibacterial agent.

Embodiment 2

[0019] Weigh 1.438g (0.005mol) of zinc sulfate heptahydrate, 1.063g of sodium stannate, and 2.86g of carboxymethyl chitosan (molecular weight 50,000) into a 250mL reactor, add 100ml of distilled water, stir for 3 hours, and control the reaction temperature at 10°C, filter and dry after the reaction, and the product obtained is zinc hydroxystannate / carboxymethyl chitosan hybrid antibacterial agent.

Embodiment 3

[0021] Weigh 0.897g (0.005mol) of zinc sulfate monohydrate, 1.334g of sodium stannate trihydrate, and 2.86g of carboxymethyl chitosan (molecular weight: 250,000) into a 250mL reactor, add 100ml of distilled water, and stir for 6 hours. Control at 20°C, filter and dry after the reaction, and the product obtained is zinc hydroxystannate / carboxymethyl chitosan hybrid antibacterial agent.

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Abstract

The invention belongs to the technical field of preparation of hybrid materials, and particularly discloses a hybrid antibacterial agent of zinc hydroxystannate / carboxymethyl chitosan and a preparation method thereof. The dispersing size of the hybrid antibacterial agent in water is 50-1100nm. The preparation method comprises the following steps: adding zinc salt, stannate and carboxymethyl chitosan into water to agitate and react for 1-12 hours, wherein the reaction temperature is 0-80 DEG C; filtering and drying after reaction is ended, so as to obtain the hybrid antibacterial agent. The carboxymethyl chitosan with good water solubility is used as one of the main ingredients of the hybrid antibacterial agent. Therefore, the dispersion stability of the hybrid antibacterial agent in water can be greatly improved, and the hybrid antibacterial agent of zinc hydroxystannate / carboxymethyl chitosan has excellent antibacterial and bactericidal action on escherichia coli. In addition, the preparation method provided by the invention has the characteristics of simple steps, cheap and available raw materials, mild reaction conditions, and the like, and is high in yield, low in production cost and applicable to large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of hybrid material preparation, and in particular relates to a zinc hydroxystannate / carboxymethyl chitosan hybrid antibacterial agent and a preparation method thereof. Background technique [0002] In recent years, global epidemics caused by pathogenic microorganisms continue to threaten human health. The development and application of antibacterial materials and products can control and slow down the pollution and harm of bacteria and microorganisms to people's lives from the perspective of materials, and has attracted more and more attention. Therefore, research and development of highly efficient, non-toxic (low toxicity), and durable antibacterial products has become a hot spot in the antibacterial field and an important issue closely related to human health. [0003] Inorganic antibacterial materials have the advantages of high efficiency and safety, but there are also some disadvantages, such as high ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N59/16A01P1/00A01N43/16
Inventor 贺洁王淼李志伟
Owner HENAN UNIVERSITY