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Antibacterial polylactic acid master batch and application thereof

A technology of lactic acid masterbatch and polylactic acid, applied in the field of biological materials, can solve the problems of unstable physical and chemical properties, limited application scope, etc.

Active Publication Date: 2020-10-20
雄县雄阳新材料科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently for CuO and Cu 2 There are many ways to prepare O nanoparticles, but most of the prepared Cu-based nanoparticles cannot be well dispersed into the substrate, and when inorganic Cu nanoparticles are combined with organic substrates, it often leads to microphase Separation of structure, which causes a series of unstable physical and chemical properties, which greatly limits its application range

Method used

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  • Antibacterial polylactic acid master batch and application thereof

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Embodiment approach

[0047] According to other embodiments of the present invention, the step B includes:

[0048] Step S1, the polylactic acid masterbatch is crushed into granules, dried at 80-200°C for 10 hours, and mixed with antibacterial powder to obtain a polylactic acid-antibacterial powder mixture; in the polylactic acid-antibacterial powder mixture Wherein, the antibacterial powder accounts for 1%-20% of the mass of the polylactic acid nibs;

[0049] Step S2: Put the polylactic acid-antibacterial powder mixture into a double-cone screw extruder for melt blending. During the melt blending process, the temperature is controlled at 180-250°C. After the extrusion is cooled, it is pelletized. Obtain antibacterial polylactic acid masterbatch.

[0050] In some specific embodiments of the present invention, using the method of the present invention to prepare antibacterial polylactic acid masterbatch includes the following steps:

[0051] (1) Preparation of antibacterial powder: the copper oxide (CuO) a...

Embodiment 1

[0087] 1. Preparation of antibacterial polylactic acid masterbatch:

[0088] (1) Weigh 0.795gCuO, 14.310g Cu 2 O (the molar ratio of copper oxide to cuprous oxide is 0.1:1) and 3.021g of graphene oxide (the mass ratio of graphene oxide to copper oxide and cuprous oxide mixed powder is 0.2:1) in a flask, shake and stir Evenly, and dispersed in 400mL deionized water, fully stirred for 12h under 80℃ oil bath conditions, centrifuged at 3000rpm for 10min, rinsed with deionized water and freeze-dried. The obtained solid powder is placed in the center of the tubular reactor, and the system is evacuated to 300 Pa with an argon flow. The sample was heated to 400°C at a heating rate of 5°C / min, and kept at this temperature for 4 hours, and then taken out after cooling to obtain nano-copper oxide and cuprous oxide containing a carbonized layer, namely antibacterial powder.

[0089] (2) Grind the commercially available polylactic acid masterbatch with a grinder into granules, and dry them at ...

Embodiment 2

[0095] 1. Preparation of antibacterial polylactic acid masterbatch:

[0096] (1) Weigh 1.36g CuO, 4.77g Cu 2 O (the molar ratio of copper oxide to cuprous oxide is 0.5:1) and 1.23g starch (the mass ratio of starch, copper oxide and cuprous oxide mixed powder is 0.2:1) in a flask, shake and stir evenly, and disperse In 400mL deionized water, fully stirred for 12h under 80℃ oil bath, centrifuged at 3000rpm for 10min, rinsed with deionized water, and freeze-dried. The obtained solid powder is placed in the center of the tubular reactor, and the system is evacuated to 250 Pa with an argon flow. The sample is heated to 500°C at a heating rate of 8°C / min, kept at this temperature for 2h, and taken out after cooling to obtain nano-copper oxide and cuprous oxide containing a carbonized layer, namely antibacterial powder.

[0097] (2) Grind the commercially available polylactic acid masterbatch with a grinder into granules, and dry them at 150°C for 10 hours. Weigh 100g of the ground poly...

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Abstract

The invention belongs to the field of biological materials, and relates to an antibacterial polylactic acid master batch, which is mainly composed of carbonization layer modified copper oxide and cuprous oxide nanoparticles and polylactic acid. According to the antibacterial polylactic acid master batch provided by the invention, the antibacterial performance of polylactic acid is greatly improved, the production process is simple, the raw materials are easy to obtain, and the cost is low; and the master batch has good biocompatibility, can be applied to antimicrobial products, and can be applied to the fields of food packaging, medical instruments, building material decoration, aquaculture and the like.

Description

Technical field [0001] The invention belongs to the field of biological materials, and relates to an antibacterial polylactic acid master batch and its application. Background technique [0002] In recent years, bacterial contamination has brought huge losses to production and life. Preventing harmful bacteria from contaminating materials has always been a research hotspot in the fields of biomedicine, food packaging, and daily chemical industry. Bacteria adhere to the surface of the material and form a biofilm, leading to related diseases and even death, seriously threatening human health and causing huge economic losses. [0003] Anti-algae technology has a huge application demand in aquaculture. In aquaculture fish ponds, it is often accompanied by a large number of algae reproduction, which causes the deterioration of water quality, affects the quality of aquatic products and even leads to the death of aquatic products, which directly reduces economic benefits and harms Human...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08K3/22C08K9/02C08K3/04C08J3/22C08J5/18
CPCC08J3/226C08J5/18C08J2467/04C08K2201/011C08K2003/2248C08K9/02C08K3/042C08K2201/014C08K3/04
Inventor 王伟刘国新
Owner 雄县雄阳新材料科技开发有限公司
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