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KH-560/nano ZnO composite antibacterial film with starch substrate and preparation method of KH-560/nano ZnO composite antibacterial film with starch substrate

A KH-560, composite antibacterial technology, applied in the field of natural polymer antibacterial film, can solve the problems of reduced mechanical stability of composite antibacterial materials, affecting antibacterial performance of composite antibacterial materials, low nano-ZnO content, etc. and ecological problems, increase the content, improve the effect of dispersion

Inactive Publication Date: 2020-11-24
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the small specific surface area of ​​nano-zinc oxide and strong agglomeration effect, the content of nano-ZnO in the nano-ZnO polymer composite antibacterial material is low, which not only affects the antibacterial performance of the composite antibacterial material, but also increases its roughness. The mechanical stability of composite antibacterial materials is reduced

Method used

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  • KH-560/nano ZnO composite antibacterial film with starch substrate and preparation method of KH-560/nano ZnO composite antibacterial film with starch substrate
  • KH-560/nano ZnO composite antibacterial film with starch substrate and preparation method of KH-560/nano ZnO composite antibacterial film with starch substrate
  • KH-560/nano ZnO composite antibacterial film with starch substrate and preparation method of KH-560/nano ZnO composite antibacterial film with starch substrate

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Embodiment 1

[0036] This embodiment provides a method for preparing the starch-based KH-560 / nano-ZnO flexible antibacterial film, comprising the following steps:

[0037] (1) Preparation of nano-ZnO:

[0038] Take 5.4 g of zinc nitrate hexahydrate, dissolve it in 120 mL of deionized water, place it under an electric stirrer, add 2 moL / L sodium hydroxide solution dropwise while stirring, adjust the pH to 10.8, continue stirring for 0.5 h, and transfer the liquid to In a polytetrafluoroethylene reactor, react at 120°C for 10h. After the polytetrafluoroethylene reactor was cooled, the white precipitate formed by the reaction was alternately washed with deionized water and absolute ethanol, centrifuged three times, and dried in vacuum at 75° C. for 14 hours to obtain white nano-ZnO.

[0039](2) Preparation of KH-560 / nano-ZnO: Take 1g of dry nano-ZnO, add it into a four-necked flask filled with 200g of water-absolute ethanol (m water:m absolute ethanol=1:4), and ultrasonicate at 100W for 60min...

Embodiment 2

[0042] This embodiment provides a method for preparing the starch-based KH-560 / nano-ZnO flexible antibacterial film, comprising the following steps:

[0043] (1) Preparation of nano-ZnO:

[0044] Take 1.8 g of zinc nitrate hexahydrate, dissolve it in 120 mL of deionized water, place it under an electric stirrer, add 2 moL / L sodium hydroxide solution dropwise while stirring, adjust the pH to 8.5, continue stirring for 0.5 h, and transfer the liquid to In a polytetrafluoroethylene reactor, react at 120°C for 20h. After the polytetrafluoroethylene reactor was cooled, the white precipitate formed by the reaction was alternately washed with deionized water and absolute ethanol, centrifuged three times, and dried in vacuum at 40° C. for 24 hours to obtain white nano-ZnO.

[0045] (2) Preparation of KH-560 / nano-ZnO: Take 1g of dried nano-ZnO, add it into a four-necked flask filled with 200g of water-absolute ethanol (m water:m absolute ethanol=1:9), and ultrasonicate at 300W for 20m...

Embodiment 3

[0048] This embodiment provides a method for preparing the starch-based KH-560 / nano-ZnO flexible antibacterial film, comprising the following steps:

[0049] (1) Preparation of nano-ZnO:

[0050] Take 7.2g of zinc nitrate hexahydrate, dissolve it in 120mL of deionized water, place it under an electric stirrer, add 2moL / L sodium hydroxide solution dropwise while stirring, adjust the pH to 13, continue stirring for 0.5h, and transfer the liquid to In a polytetrafluoroethylene reactor, react at 120°C for 15h. After the polytetrafluoroethylene reactor was cooled, the white precipitate formed by the reaction was alternately washed with deionized water and absolute ethanol, centrifuged three times, and vacuum-dried at 60° C. for 18 hours to obtain white nano-ZnO.

[0051] (2) Preparation of KH-560 / nano-ZnO: Take 1g of dry nano-ZnO, add it into a four-necked flask filled with 200g of water-absolute ethanol (m water: m absolute ethanol = 1:19), and ultrasonicate at 200W for 45min. R...

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Abstract

The invention discloses a KH-560 / nano ZnO composite antibacterial film with a starch substrate and a preparation method of the KH-560 / nano ZnO composite antibacterial film with a starch substrate. Themethod comprises the following steps: preparing nano ZnO; adding the nano ZnO and KH-560 into an ethanol solution, and performing a water bath reaction to prepare KH-560 / nano ZnO; and adding the KH-560 / nano ZnO into a starch solution, and adding epoxy chloropropane to prepare the composite antibacterial film. According to the KH-560 / nano ZnO composite antibacterial film with the starch substrate,the nano ZnO is prepared through a hydrothermal method, gamma-(2, 3-epoxypropoxy) propyltrimethoxysilane is grafted on the surface, self agglomeration is reduced, epoxy groups are introduced, a cross-linking reaction between starch and a cross-linking agent is facilitated, and the antibacterial performance and thermodynamic stability are improved. In addition, the starch film with high surface activity is used as a natural renewable easily-degradable antibacterial base film, and has a wide application prospect in the fields of food packaging, biomedicine, photoelectrochemistry and the like.

Description

technical field [0001] The invention relates to the technical field of natural polymer antibacterial membranes, in particular to a starch-based KH-560 / nanometer ZnO flexible composite antibacterial membrane material and a preparation method thereof. Background technique [0002] Nanomaterials have surface and interface effects, small size effects, and dielectric confinement, etc., which make nanomaterials have excellent optical, electrical and many other properties, and can be used in many fields such as biology, chemical industry, and medicine. Nano-ZnO has good antibacterial and biocompatibility, and has been applied to ceramics, rubber, paint and other industries due to its unique ultraviolet absorption, semiconductor, and antibacterial properties; but nano-ZnO in powder is not conducive to recycling in actual use , which causes great waste and potential harm to the environment and human health. Due to the concept of environmental protection, nano-ZnO and green renewable ...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L3/02C08K9/10C08K3/22
CPCC08J5/18C08J2303/02C08K9/10C08K2003/2296C08K2201/011
Inventor 胡飞贺非凡
Owner SOUTH CHINA UNIV OF TECH
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