Antibacterial water-resistant material and preparation method thereof

Abstract

The invention belongs to the field of preparation of antibacterial and water-resistant materials, and particularly relates to an antibacterial water-resistant material and a preparation method thereof. The specific technical scheme is as follows: the antibacterial water-resistant material comprises the following components in parts by weight: 15-40 parts of amylose, 15-30 parts of tea polyphenol, and 5-15 parts of fatty acid ester for compounding and fatty acid ester for dewatering in total. The amylose and the tea polyphenol are cross-linked to form a matrix material with a net structure, the matrix material is compounded with the fatty acid ester and then is filled with the fatty acid ester for dewatering, a denser grid structure material is formed, the grid structure material hasexcellent degradation performance and has antibacterial and antioxidant effects at the same time, and the water resistance of the material is improved.

Description

technical field

[0001] The invention belongs to the field of preparation of antibacterial and water-resistant materials, and in particular relates to an antibacterial and water-resistant material and a preparation method thereof. Background technique

[0002] Traditional packaging materials generally use petroleum-based materials such as polyethylene, which are difficult to degrade and cannot be recycled after being discarded. If incineration is used, many toxic by-products will be produced; if direct burial is used , it takes a long time to completely degrade. Therefore, seeking a degradable, environmentally friendly and durable packaging material has become a research hotspot in the field of materials in recent years.

[0003] Starch is a nutrient stored in plants and has a wide range of sources. It is a degradable high-molecular carbohydrate with good film-forming properties and can be used to prepare degradable materials. However, the antibacterial performance of the m...

Examples

preparation example Construction

[0031] The invention also discloses a preparation method of an antibacterial and water-resistant material, comprising the following steps:

[0032] A1. Dissolving amylose in a solvent at 20-60°C to prepare an amylose solution, and dissolving tea polyphenols in a solvent at 20-50°C to prepare a tea polyphenol solution. During the preparation of the two solutions, Continuously stir the solution by means of mechanical stirring, the stirring rate is 20-60r / min, stop stirring until it is completely dissolved. Mix the two solutions evenly at 20-60°C and keep stirring the mixed solution, add the cross-linking agent into the mixed solution at 20-60°C, and continuously stir the mixed solution by mechanical stirring at a stirring rate of 50-150r / min , the stirring time is continued for 30-120 minutes, so that the hydroxyl groups of amylose and the phenolic hydroxyl groups of tea polyphenols are cross-linked to form a cross-linked product with a network structure, and a matrix material i...

Embodiment

[0038] 1. Prepare antibacterial waterproof materials according to the above-mentioned formula and method. The specific proportions are shown in Table 1 below. All groups in Table 1 are carried out according to the following operating parameters: after adding the cross-linking agent, the cross-linking reaction temperature is 50°C, the stirring rate is 120r / min, and the stirring time is 40min; after adding the fatty acid ester for compounding, the compounding reaction temperature is 50°C, the stirring rate is 80r / min, and the stirring time is 50min; after adding the fatty acid ester for hydrophobicity, The ultrasonic oscillation time is 20min, and the processing power is 500W; after adding the composite material of PBAT and gelatin, the film material is extruded with a screw extruder at 100°C.

[0039] Each group proportioning (parts by weight) of table 1

[0040]

[0041] 2. After the bacteriostatic waterproof materials made by the above groups are made into thin films, the ...

technical field

[0001] The invention belongs to the field of preparation of antibacterial and water-resistant materials, and in particular relates to an antibacterial and water-resistant material and a preparation method thereof. Background technique

[0002] Traditional packaging materials generally use petroleum-based materials such as polyethylene, which are difficult to degrade and cannot be recycled after being discarded. If incineration is used, many toxic by-products will be produced; if direct burial is used , it takes a long time to completely degrade. Therefore, seeking a degradable, environmentally friendly and durable packaging material has become a research hotspot in the field of materials in recent years.

[0003] Starch is a nutrient stored in plants and has a wide range of sources. It is a degradable high-molecular carbohydrate with good film-forming properties and can be used to prepare degradable materials. However, the antibacterial performance of the m...

Examples

preparation example Construction

[0031] The invention also discloses a preparation method of an antibacterial and water-resistant material, comprising the following steps:

[0032] A1. Dissolving amylose in a solvent at 20-60°C to prepare an amylose solution, and dissolving tea polyphenols in a solvent at 20-50°C to prepare a tea polyphenol solution. During the preparation of the two solutions, Continuously stir the solution by means of mechanical stirring, the stirring rate is 20-60r / min, stop stirring until it is completely dissolved. Mix the two solutions evenly at 20-60°C and keep stirring the mixed solution, add the cross-linking agent into the mixed solution at 20-60°C, and continuously stir the mixed solution by mechanical stirring at a stirring rate of 50-150r / min , the stirring time is continued for 30-120 minutes, so that the hydroxyl groups of amylose and the phenolic hydroxyl groups of tea polyphenols are cross-linked to form a cross-linked product with a network structure, and a matrix material i...

Embodiment

[0038] 1. Prepare antibacterial waterproof materials according to the above-mentioned formula and method. The specific proportions are shown in Table 1 below. All groups in Table 1 are carried out according to the following operating parameters: after adding the cross-linking agent, the cross-linking reaction temperature is 50°C, the stirring rate is 120r / min, and the stirring time is 40min; after adding the fatty acid ester for compounding, the compounding reaction temperature is 50°C, the stirring rate is 80r / min, and the stirring time is 50min; after adding the fatty acid ester for hydrophobicity, The ultrasonic oscillation time is 20min, and the processing power is 500W; after adding the composite material of PBAT and gelatin, the film material is extruded with a screw extruder at 100°C.

[0039] Each group proportioning (parts by weight) of table 1

[0040]

[0041] 2. After the bacteriostatic waterproof materials made by the above groups are made into thin films, the ...

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