Air-resistant antibacterial biological film, and preparation method and application thereof

A biofilm and gas-barrier technology, applied in the field of polymer materials, can solve the problems of lack of versatility and achieve excellent antibacterial properties, excellent gas-barrier properties, and high stability

Inactive Publication Date: 2016-07-20
GUANGDONG IND TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, these research results of cellulose are not universal

Method used

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  • Air-resistant antibacterial biological film, and preparation method and application thereof
  • Air-resistant antibacterial biological film, and preparation method and application thereof
  • Air-resistant antibacterial biological film, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The preparation method of the gas barrier and antibacterial biofilm of the present embodiment comprises the following steps:

[0031] (1) The TEMPO chemically pretreated nanocellulose is formulated into a dispersion liquid with a content of 1% (w / w) of cellulose evenly dispersed;

[0032] (2) dissolving chitosan with 2% acetic acid to prepare a solution with a chitosan content of 1% (w / w);

[0033] (3) the cellulose dispersion and the chitosan solution are evenly mixed, the weight ratio of the cellulose dispersion and the chitosan solution is 1: 0.1, the stirring speed is 1000rpm, the stirring time is 30 minutes, and the degassing is complete;

[0034] (4) Dewatering by model casting and coating, drying at 35°C to obtain a gas-barrier antibacterial biofilm with a film weight of 20 g / m 2 .

[0035] The morphology of the prepared gas-barrier antibacterial biofilm is as follows: figure 1 and figure 2 shown, by figure 1 and figure 2 It can be seen that the prepared ...

Embodiment 2

[0037] The preparation method of the gas barrier and antibacterial biofilm of the present embodiment includes the following steps:

[0038] (1) The nanocellulose pretreated with biological enzyme is formulated into a dispersion liquid with a content of 1% (w / w) of cellulose evenly dispersed;

[0039] (2) dissolving chitosan with 0.01mol / L hydrochloric acid to prepare a solution with a chitosan content of 1% (w / w);

[0040] (3) the cellulose dispersion and the chitosan solution are evenly mixed, the weight ratio of the cellulose dispersion and the chitosan solution is 1: 0.1, the stirring speed is 1000rpm, the stirring time is 30 minutes, and the degassing is complete;

[0041] (4) Dewatering by casting coating method of microporous membrane cushion layer, drying at 35°C, to obtain gas-barrier antibacterial biofilm, the membrane weight is 2g / m 2 .

[0042] The gas barrier results of the prepared gas barrier and antibacterial biofilms are shown in Table 1, and the antibacteria...

Embodiment 3

[0044] The preparation method of the gas barrier and antibacterial biofilm of the present embodiment includes the following steps:

[0045] (1) The TEMPO chemically pretreated nanocellulose is formulated into a dispersion liquid with a content of 1% (w / w) of cellulose evenly dispersed;

[0046] (2) dissolving chitosan with 2% acetic acid to prepare a solution with a chitosan content of 1% (w / w);

[0047] (3) the cellulose dispersion and the chitosan solution are evenly mixed, the weight ratio of the cellulose dispersion and the chitosan solution is 1: 0.05, the stirring speed is 1000rpm, the stirring time is 30 minutes, and the degassing is complete;

[0048] (4) Dehydration by pressure dehydration method, drying at 40°C, to obtain a gas-barrier antibacterial biofilm with a film weight of 20g / m 2 .

[0049] The gas barrier results of the prepared gas barrier and antibacterial biofilms are shown in Table 1, and the antibacterial results are shown in Table 2.

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Abstract

The invention provides an air-resistant antibacterial biological film. The biological film is composed of cellulose and chitosan with a weight ratio of (0-2): (0-0.4), wherein both cellulose and chitosan are not zero; and cellulose is nanometer cellulose and/or micron cellulose. The biological film is prepared through the following steps: preparing chemical or biological enzyme pretreated cellulose into a uniformly-dispersed dispersion; dissolving chitosan with acid so as to prepare a chitosan solution; uniformly mixing the cellulose dispersion and the chitosan solution; and carrying out dehydration. The air-resistant antibacterial biological film provided by the invention has air-resistant and antibacterial properties required by air-resistant antibacterial packaging, and can be applied in preparation of air-resistant and/or antibacterial products. The air-resistant antibacterial biological film has the characteristics of excellent air-resistant and antibacterial properties, good antimicrobial bonding strength, high stability and capability of retaining natural green of plant cellulose, has performances similar to performances of paper, i.e., environment protection, biocompatibility, renewability and large-area flexibility, has simple preparation method, is easy to realize industrialization, and has significant practical value.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a gas barrier and antibacterial biofilm and a preparation method and application thereof. Background technique [0002] Chitosan is composed of D-glucosamine combined with β-1,4-glycosidic bonds, and has antibacterial properties, various biological activities, and adsorption functions. Nanocellulose is a cellulose with nanometer diameter obtained by refining plant cellulose. From this, nanocellulose can be made into a nanocellulose film similar to a plastic film. It has high strength, high transparency, and retains cellulose. The natural safety and biocompatibility characteristics. Nanocellulose / chitosan composite material has the common characteristics of cellulose and chitosan, has biocompatibility and biodegradability, overcomes the danger of pollution caused by refractory plastic film, and is used in the fields of food packaging and biomedicine. Applications are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/02C08L5/08C08J5/18
Inventor 颜进华
Owner GUANGDONG IND TECHN COLLEGE
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