Preparation method for antibacterial plastic

A technology of antibacterial plastics and antioxidants, which is applied in the field of preparation of new antibacterial plastics, can solve problems such as uneven mixing of antibacterial agents, high toxicity of antibacterial agents, and short duration of drug effects, and achieve good application prospects and broad-spectrum antibacterial properties strong effect

Inactive Publication Date: 2018-11-09
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of high toxicity of antibacterial agents, poor drug resistance, short duration of drug effect and uneven mixing of antibacterial agents in the plastic matrix in current antibacterial plastic products, the present invention provides a preparation method of antibacterial plastics, through sol-gel The antibacterial ions are loaded on the silica gel carrier to obtain the antibacterial powder material, and it is modified with a silane coupling agent to optimize and improve the dispersion performance of the antibacterial powder in the plastic matrix, and then the modified antibacterial powd

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Example 1: The preparation method of silver-based antibacterial plastic is as follows:

[0025] (1) Put the sodium silicate solution and sodium bicarbonate solution preheated to 85°C into the reactor at a volume ratio of 1:1.5, and react at a temperature of 85°C and a speed of 500r / min. After 10 minutes of reaction Obtain a silica gel sol system, wherein the mass concentration of the sodium silicate solution is 5%, and the mass concentration of the sodium bicarbonate solution is 10%;

[0026] (2) According to the volume ratio of 1:1.5, measure the sodium silicate solution and sodium bicarbonate solution respectively and preheat it to 85°C, then adjust the reactor speed to 100 r / min; preheat the sodium silicate The solution and sodium bicarbonate solution were added to the silica gel sol system of step (1) in sequence, and the silica gel system was obtained after full reaction for 15 minutes. Then 0.001 mol / L silver nitrate solution was added, and the pH was adjusted to 5 wit...

Example Embodiment

[0036] Example 2: The preparation method of silver-lutetium antibacterial plastic is as follows:

[0037] (1) Put the sodium silicate solution and sodium bicarbonate solution preheated to 80°C into the reactor in a volume ratio of 1:1.3, and react at a temperature of 80°C and a speed of 400r / min. The reaction time is 15 minutes. Silica gel sol system, in which the mass concentration of sodium silicate solution is 10%, and the mass concentration of sodium bicarbonate solution is 5%;

[0038] (2) According to the volume ratio of 1:1.3, measure the sodium silicate solution and sodium bicarbonate solution respectively and preheat to 80℃, then adjust the reactor speed to 150 r / min; press the preheated above solution Add to the silica gel sol system of step (1) in order, and obtain a silica gel system after full reaction for 20 minutes, then add 0.0002mol / L silver nitrate solution, add 0.005mol / L lutetium nitrate after reaction for 2 minutes, adjust the pH to 6 with nitric acid , The ad...

Example Embodiment

[0045] Example 3: The preparation method of silver-scandium antibacterial plastic is as follows:

[0046] (1) Put the sodium silicate solution and sodium bicarbonate solution preheated to 90°C into the reactor in a volume ratio of 1:1.4, and react at a temperature of 90°C and a speed of 400r / min. The reaction time is 20 minutes. Silica gel sol system, in which the mass concentration of sodium silicate solution is 15%, and the mass concentration of sodium bicarbonate solution is 10%;

[0047] (2) According to the volume ratio of 1:1.4, measure the sodium silicate solution and sodium bicarbonate solution respectively and preheat to 90℃, then adjust the reactor speed to 200 r / min; then preheat the above solution Add to the silica gel sol system of step (1) in order, fully react for 25 minutes to obtain a silica gel system, then add 0.001 mol / L silver nitrate solution, add 0.01 mol / L scandium nitrate after 3 minutes of reaction, adjust the pH with nitric acid To 5.5, the added metal i...

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PUM

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Abstract

The invention discloses a preparation method for an antibacterial plastic. The preparation method comprises the following steps: loading antibacterial ions on a silica gel carrier by using a sol-gel process so as to obtain an antibacterial powder material; modifying the antibacterial powder material with a silane coupling agent; then uniformly mixing the modified antibacterial powder material witha plastic matrix, an anti-oxidant and a plasticizer, and carrying out fusing, extrusion and granulation successively so as to prepare high-concentration antibacterial master batch; and uniformly mixing the antibacterial master batch with the plastic matrix according to a certain ratio and carrying out fusing and extrusion successively so as to prepare an antibacterial sample. The method of the invention carries out surface modification on antibacterial powder so as to improve the dispersibility of the antibacterial powder in the plastic matrix; and the prepared antibacterial plastic has antibacterial broad-spectrum activity, long antibacterial duration, high safety and almost unchanged mechanical properties. The antibacterial plastic can be extensively applied to the fields of household electrical appliances, packaging, kitchens and baths and has good market application prospects.

Description

technical field [0001] The invention discloses a preparation method of a new type of antibacterial plastic, especially relates to using silica gel as a carrier, and modifying the prepared antibacterial powder, which lays a good foundation for improving its dispersion performance in the plastic matrix, so that the The antibacterial performance of the antibacterial plastic is improved, and belongs to the technical field of new antibacterial plastic materials. Background technique [0002] There are a large number of plastic products in people's daily life, such as the shell and lining of household appliances, kitchen and bathroom equipment, food packaging, etc. Because plastic is an organic macromolecular material, and other additives are added in the preparation process, it is very easy for bacteria to grow under suitable conditions. As more and more antibacterial products have entered people's lives and are constantly recognized by people, people have put forward new requir...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L55/02C08K9/12C08K9/06C08K3/36C08K3/22C08J3/22
CPCC08J3/226C08J2323/12C08J2423/12C08K2003/2286C08L23/12C08L55/02C08K9/12C08K9/06C08K3/36C08K3/22
Inventor 唐晓宁郭洋洋孙彦琳张彬朱荣辉李存杰
Owner KUNMING UNIV OF SCI & TECH
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