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Nano antibacterial master batch

A kind of antibacterial masterbatch and nanotechnology, which is applied in the field of antibacterial agents, can solve the problems that the surface of graphene has not been modified, cannot be applied in the field of food packaging, and nanomaterials are easy to agglomerate, so as to achieve good dispersion uniformity, reduce viscosity and migration of products Effect of high risk and product safety

Active Publication Date: 2021-10-15
ZHEJIANG QUZHOU JUSU CHEM IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage is that although the patent supports nano-Ag on graphene, the surface of graphene has not been modified, and there is a defect that the compatibility between inorganic nano-materials and organic resins is poor. In addition, because the surface of nano-graphene materials has not been modified, nano Material is easy to agglomerate
The disadvantage is that although graphene has antibacterial effect, the antibacterial effect is limited and far less than that of Ag
This invention uses a silane coupling agent to modify the surface of graphene. The disadvantage is that the silane coupling agent is a toxic substance and cannot be used in the field of food packaging. In addition, although graphene has an antibacterial effect, the antibacterial effect is limited and far inferior to that of Ag.

Method used

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  • Nano antibacterial master batch

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Effect test

Embodiment 1

[0035] A nano antibacterial masterbatch, prepared from the following materials and according to the following method, graphene oxide GO, deionized water, tetraethoxysilane, ammonia water, pyrrolidone solution, sodium borohydride solution, AgNO3 solution, liquid aluminate Coupling agent PN-827 and LDPE powder, the preparation method is as follows:

[0036] (1) Preparation of SiO 2 / GO Nanomaterials

[0037] In a 5L reaction flask, weigh 1.2g of GO with an average diameter of 400nm and add it into deionized water to form a suspension with a concentration of 0.3g / L, ultrasonically disperse for 0.5h (ultrasonic frequency is 10000Hz), add 0.3g of tetraethoxy base silane, then add ammonia water to adjust the pH of the solution to 8, then seal it with parafilm and continue to stir for 0.5h (stirring speed is 80rpm), filter to obtain 1.31gSiO 2 / GO nano-powder and filtrate, the nano-powder was washed with deionized water, centrifuged and dried to obtain 1.28gSiO 2 / GO nanomaterials...

Embodiment 2

[0045] A nano antibacterial masterbatch, prepared from the following materials and according to the following method, graphene oxide GO, deionized water, tetraethoxysilane, ammonia water, pyrrolidone solution, sodium borohydride solution, AgNO3 solution, liquid aluminate Coupling agent PN-827 and LDPE powder, the preparation method is as follows:

[0046] (1) Preparation of SiO 2 / GO Nanomaterials

[0047] In a 5L reaction flask, weigh 1.6g of GO with an average diameter of 430nm and add it into deionized water to form a suspension with a concentration of 0.4g / L, ultrasonically disperse for 0.3h (ultrasonic frequency is 11000Hz), add 0.32g of tetraethoxy base silane, then add ammonia water to adjust the pH of the solution to 8.5, then seal it with parafilm and continue to stir for 1h (stirring speed is 90rpm), and filter to obtain 1.71gSiO 2 / GO nano-powder and filtrate, the nano-powder was washed with deionized water, centrifuged and dried to obtain 1.62gSiO 2 / GO nanomate...

Embodiment 3

[0055] A nano antibacterial masterbatch, prepared from the following materials and according to the following method, graphene oxide GO, deionized water, tetraethoxysilane, ammonia water, pyrrolidone solution, sodium borohydride solution, AgNO3 solution, liquid aluminate Coupling agent PN-827 and LDPE powder, the preparation method is as follows:

[0056] (1) Preparation of SiO 2 / GO Nanomaterials

[0057] In a 5L reaction flask, weigh 2g of GO with an average diameter of 420nm and add it into deionized water to form a suspension with a concentration of 0.5g / L, ultrasonically disperse for 0.5h (ultrasonic frequency is 12000Hz), add 0.37g of tetraethoxy Silane, then add ammonia water to adjust the pH of the solution to 9.5, then seal it with parafilm and continue to stir for 2h (stirring speed is 87rpm), filter to obtain 2.3gSiO 2 / GO nano-powder and filtrate, the nano-powder was washed with deionized water, centrifuged and dried to obtain 2.1gSiO 2 / GO nanomaterials.

[00...

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Abstract

The invention discloses a nano antibacterial master batch which is prepared from the following substances according to the following method: graphene oxide GO, water, tetraethoxysilane, a pyrrolidone solution, a sodium borohydride solution, an AgNO3 solution, a coupling agent and polyethylene powder, and the preparation method specifically comprises the following steps: (1) preparing a SiO2 / GO nano material; (2) preparing an Ag / SiO2 / GO nano material; (3) surface modification of the Ag / SiO2 / GO nano material; and (4) preparing the antibacterial master batch. The nano antibacterial master batch has the advantages of good barrier property, high stability and excellent antibacterial effect.

Description

technical field [0001] The invention relates to the technical field of antibacterial agents, in particular to a nano antibacterial masterbatch. Background technique [0002] Food is susceptible to microbial infection during production, transportation, processing and storage, resulting in food spoilage and food waste. Pasteurization technology and adding food preservatives are commonly used ways to prolong the shelf life of food. However, pasteurization technology will cause the loss of nutrients and high energy consumption. Although preservatives can inhibit the reproduction of microorganisms, they have certain effects. toxicity. Exploring simpler, energy-saving, environmentally friendly and safe food preservation methods and extending the shelf life of food are issues that packaging companies and food companies are more concerned about. [0003] Adding antimicrobial agents to food packaging is an important way to extend the shelf life of food. Among them, organic synthet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/22C08L23/06C08K9/12C08K9/04C08K3/04C08K3/08C08K3/36C08L23/08C08J5/18
CPCC08J3/226C08J5/18C08J2423/06C08K9/12C08K9/04C08K3/042C08K2003/0806C08K3/36C08K2201/011C08J2423/08C08J2323/08Y02A50/30
Inventor 林金元苏兰辉吴志刚张建岭尹作柱王文芳岳金娜
Owner ZHEJIANG QUZHOU JUSU CHEM IND CO LTD
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