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Nano-TiO2 loaded chitosan compound and preparation method thereof

A technology of nano-titanium dioxide and chitosan, which is applied in textiles, papermaking, and fiber treatment, can solve the problems of poor antibacterial durability, low safety, and delayed antibacterial effect, and achieve mild reaction conditions, wide application range, and good sustained release performance effect

Active Publication Date: 2014-04-16
科凯精细化工(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All these antibacterial agents have defects in varying degrees during use: the cost of inorganic antibacterial agents is high, and the antibacterial effect is slow; organic antibacterial agents are often irritating to the skin, have low safety, and poor antibacterial durability; natural antibacterial agents The broad-spectrum of the agent is poor, and it is unstable to light, heat and chemicals, so people urgently need to develop new technologies and new methods to solve these problems
However, electron-hole pairs are easy to recombine, which affects its catalytic activity, and it must be irradiated with ultraviolet light, which limits the application range of titanium dioxide.

Method used

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  • Nano-TiO2 loaded chitosan compound and preparation method thereof
  • Nano-TiO2 loaded chitosan compound and preparation method thereof
  • Nano-TiO2 loaded chitosan compound and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Use acetic acid solution to fully dissolve chitosan, prepare a chitosan solution with a mass percentage of 0.5%, take 15mL of the above chitosan solution and 0.0365g of nano-TiO 2 Placed in a beaker, ultrasound makes nano-TiO 2 Disperse uniformly in the chitosan solution, and then add 0.15mL Tween80 to obtain the pre-emulsified water phase mixture; add 100mL petroleum ether, 50mL liquid paraffin and 7.5mL emulsifier Span80 to a three-necked flask, and after stirring, it becomes oil Phase mixture. Add the pre-emulsified water phase mixture to the oil phase mixture uniformly and slowly by spraying, control the reaction temperature at 30°C, stir for 0.5h, add 0.1mL glutaraldehyde, continue to stir for 4h, stand still, filter with suction, and wash. After drying, chitosan loaded nano-TiO is obtained 2 Antibacterial microspheres, the electron microscope photos are as figure 1 As shown, figure 1 The scale bar in is 200μm.

Embodiment 2

[0025] Use acetic acid solution to fully dissolve chitosan, prepare a chitosan solution with a mass percentage of 2%, take 15mL of the above chitosan solution and 0.0365g of nano-TiO 2 Placed in a beaker, ultrasound makes nano-TiO 2 Disperse uniformly in the chitosan solution, then add 0.15mL Tween80 to obtain the pre-emulsified water phase mixture; add 100mL petroleum ether, 50mL liquid paraffin and 7.5mL emulsifier Span80 to a three-necked flask, and stir it evenly by mechanical means, which is an oil Phase mixture. Add the pre-emulsified water phase mixture to the oil phase mixture uniformly and slowly by spraying, control the reaction temperature at 30°C, stir for 0.5h, add 0.39mL glutaraldehyde, continue to stir for 4h, stand still, filter and wash, After drying, chitosan loaded nano-TiO is obtained 2 Antibacterial microspheres.

Embodiment 3

[0027] Use acetic acid solution to fully dissolve chitosan, prepare a chitosan solution with a mass percentage of 1%, take 15mL of the above chitosan solution and 0.0365g of nano-TiO 2 Placed in a beaker, ultrasound makes nano-TiO 2 Disperse uniformly in the chitosan solution, and then add 0.075mL Tween80 to obtain a pre-emulsified water phase mixture; add 100mL petroleum ether, 50mL liquid paraffin and 7.5mL emulsifier Span80 to a three-necked flask, and stir it evenly, and it is an oil Phase mixture. Add the pre-emulsified water phase mixture to the oil phase mixture uniformly and slowly by spraying, control the reaction temperature at 30°C, stir for 0.5h, add 0.2mL glutaraldehyde, continue stirring for 4h, stand still, filter and wash, After drying, chitosan loaded nano-TiO is obtained 2 Antibacterial microspheres.

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Abstract

The invention discloses a nano-TiO2 loaded chitosan compound and a preparation method thereof. The preparation method comprises the following steps: mixing chitosan and a nano-TiO2 solution into water to obtain an aqueous phase mixture; taking petroleum ether / liquid petrolatum as an oil phase mixture; preparing nano-TiO2 loaded chitosan anti-bacterial micro-spheres according to the suspension-cross-linking technology. As the natural antibacterial agent chitosan is taken as a wall material, a metal ion-type antibacterial agent TiO2 is taken as a core material, and the compound antibacterial agent is prepared according to the suspension-cross-linking technology, the performance and the application range of the antibacterial agent can be greatly improved through the synergistic effect and advantage complementation of chitosan and TiO2. Furthermore, after being compounded, the novel antibacterial agent is high in performance, relatively wide in anti-bacterial range, and high in stability.

Description

Technical field [0001] The invention relates to a textile antibacterial microsphere and a preparation method thereof, in particular to a chitosan loaded nanometer TiO 2 Antibacterial microspheres and preparation method thereof. technical background [0002] The antibacterial agents currently used on the market mainly include inorganic antibacterial agents, organic antibacterial agents and natural antibacterial agents. Inorganic antibacterial agents mainly include metal ion type and photocatalytic type. The metal ion type includes silver series, zinc series and copper series. Through physical adsorption, ion exchange and other methods, the antibacterial effect of silver, copper, zinc and other metals (or metal ion ) Fixed on the surface of porous materials such as fluorite and silica gel to make antibacterial agent; photocatalytic type is mainly anatase nano TiO 2 , Its bactericidal ability comes from its photocatalytic activity. Organic antibacterial agents have been researched ...

Claims

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Application Information

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IPC IPC(8): D06M15/03D06M11/46D06M23/12C08J3/24C08B37/08
Inventor 任一波周文张萍武小荣赖喻珍戚文迎俞成丙
Owner 科凯精细化工(上海)有限公司
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