Graphene oxide/nano-copper composite antibacterial agent, antibacterial master batch and preparation methods thereof

A composite antibacterial agent and nano-copper technology, applied in the field of graphene, can solve problems such as difficult industrial application, poor antibacterial effect, complicated preparation process, etc., and achieve the effects of weight reduction, good antibacterial effect, and simple preparation method

Active Publication Date: 2021-11-12
深圳环能石墨烯科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is: the existing composite polylactic acid antibacterial agent either has poor antibacterial effect and poor stability, or has complicated preparation process, numerous raw materials, and is difficult to be industrialized.

Method used

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  • Graphene oxide/nano-copper composite antibacterial agent, antibacterial master batch and preparation methods thereof
  • Graphene oxide/nano-copper composite antibacterial agent, antibacterial master batch and preparation methods thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Embodiment 1 adopts the inventive method to prepare graphene oxide composite polylactic acid antibacterial sheet

[0040] The specific operation steps are as follows:

[0041] 1. Dissolve 60mg copper sulfate in 20ml deionized water to form solution A;

[0042] 2. Heat 5g of polyvinyl alcohol (PVA) at 80°C and stir to dissolve it in 30ml of deionized water to form solution B;

[0043] 3. Stir solution B in a magnetic stirrer, add solution A dropwise while stirring, so that copper ions dissolve in B, PVA plays a protective role, then add 5ml glucose to reduce copper ions into nano-copper particles, stir for 0.5h, Finally, solution C is formed;

[0044] 4. Dissolve 200mg of graphene oxide in 20ml of deionized water, stir ultrasonically to form a stable dispersed suspension, then add solution C to it, then transfer the mixture to a long glass tube, seal it, and freeze it at -20°C After thawing, Cu / GO composites were formed after repeated 3 times;

[0045] 5. Finally, fr...

Embodiment 2

[0049] Embodiment 2 adopts the inventive method to prepare graphene oxide composite polylactic acid antibacterial sheet

[0050] The difference from Example 1 is that the PVA dissolution temperature is 85°C, the freezing and thawing cycles are 4 times in step 4, the freeze-drying time in step 5 is 10h, the concentration of copper sulfate solution is 4mg / ml, and the concentration of PVA solution is 0.18g / ml , the volume ratio of the two is 2.5:3.5; when preparing graphene oxide composite polylactic acid antibacterial masterbatch, the weight ratio of raw materials is 98% polylactic acid masterbatch and 2% graphene oxide composite antibacterial agent.

Embodiment 3

[0051] Embodiment 3 adopts the inventive method to prepare graphene oxide composite polylactic acid antibacterial sheet

[0052] The difference from Example 1 is that the PVA dissolution temperature is 90°C, the freezing and thawing cycle is 5 times in step 4, the freeze-drying time in step 5 is 12h, the concentration of copper sulfate solution is 5mg / ml, and the concentration of PVA solution is 0.32g / ml , the volume ratio of the two is 3:4; when preparing graphene oxide composite polylactic acid antibacterial masterbatch, the weight ratio of raw materials is 97% polylactic acid masterbatch and 3% graphene oxide composite antibacterial agent.

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Abstract

The invention belongs to the technical field of graphene, and particularly relates to a graphene oxide/nano-copper composite antibacterial agent, an antibacterial master batch and preparation methods thereof, and aiming at overcoming the defects that an existing composite polylactic acid antibacterial agent is poor in antibacterial effect and stability, or complex in preparation process, numerous in raw materials and difficult to industrially apply. According to preparation method of the graphene oxide/nano-copper composite antibacterial agent,a copper sulfate solution reacts with a polyvinyl alcohol solution, on the premise that glucose is added to reduce copper ions into nano-copper particles, the nano-copper particles react with graphene oxide, and the graphene oxide/nano-copper composite antibacterial agent is obtained. The preparation method of the antibacterial agent is simple to operate, and raw materials are easy to obtain; the prepared antibacterial agent is good in antibacterial effect, low in cost, higher in stability and longer in antibacterial time; meanwhile, the antibacterial agent can be effectively combined with polylactic acid, so that the antibacterial property and the mechanical strength of the polylactic acid are improved, and the weight of the environment-friendly tableware is reduced.

Description

technical field [0001] The invention belongs to the technical field of graphene, and in particular relates to a graphene oxide / nano-copper composite antibacterial agent, an antibacterial masterbatch and a preparation method thereof. Background technique [0002] With the development of my country's medical and health services and people's pursuit of a healthy life, people's requirements for antibacterial products continue to increase. It is a low-cost and effective production method to improve the antibacterial performance of some daily necessities by adding antibacterial agents. [0003] There are many kinds of antibacterial agents. Nano-antibacterial materials such as nano-silver and nano-copper have the characteristics of quantum effect, small size effect and large specific surface area, which can effectively destroy common bacteria and viruses such as Staphylococcus aureus, Pseudomonas aeruginosa and Escherichia coli. and other eukaryotic microorganisms. However, nano-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/12C08K9/10C08K3/04C08K3/08C08J3/22C08L67/04
CPCC08K9/12C08K9/10C08K3/042C08K3/08C08J3/226C08K2003/085C08J2467/04
Inventor 马征峥潘登张浩轩张云宝冼林杰
Owner 深圳环能石墨烯科技有限公司
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