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Preparation method of degradable nano bacteriostatic thin film

A nano-film technology, applied in the field of nano-antibacterial film preparation, can solve the problem of no antibacterial and other problems, and achieve the effect of easy promotion, simple process steps, and low permeability

Inactive Publication Date: 2017-08-22
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, no degradable PVA / nano-Si-TiO has been reported in the existing reports. 2 There is no report on the packaging material, nor any report on its antibacterial effect

Method used

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  • Preparation method of degradable nano bacteriostatic thin film

Examples

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Embodiment 1

[0027] The present embodiment relates to a kind of preparation method of degradable nano antibacterial film, and it comprises the steps:

[0028] Nano-TiO Modified by Silane Coupling Agent 2 : 0.1g nano-TiO 2 (particle size of 100nm) and 0.01g of silane coupling agent (aminopropyltriethoxysilane, APS) were added to 10mL of acetone solution, ultrasonically coupled under the condition of ultrasonic power of 600W for 30 minutes, washed with pure water for 2 times, filtered, vacuum dried for 4h, and the dried product was ground into modified nano-TiO 2 (Si-TiO 2 ). Polyvinyl alcohol / nano Si-TiO 2 Preparation of packaging materials: Add 3 g of polyvinyl alcohol (type 1797) powder into 97 mL of pure water, heat and stir at 95° C. for 2 hours, and cool to obtain a 3% polyvinyl alcohol aqueous solution. 0.06g nano-Si-TiO 2 Add 0.06g dispersant polyethylene glycol 400 (PEG400) into the above-mentioned polyvinyl alcohol (PVA) aqueous solution and blend (Si-TiO 2 / PVA=2.00wt%), so...

Embodiment 2

[0030] The present embodiment relates to a kind of preparation method of degradable nano antibacterial film, and it comprises the steps:

[0031] Nano-TiO Modified by Silane Coupling Agent 2 : 0.1g nano-TiO 2 (particle size of 100nm) and 0.02g of silane coupling agent (aminopropyltriethoxysilane, APS) were added to 10mL of acetone solution, ultrasonically coupled for 30 minutes under the condition of ultrasonic power of 500W, and washed with pure water for 2 times, filtered, vacuum dried for 4h, and the dried product was ground into modified nano-TiO 2 (Si-TiO 2 ). Polyvinyl alcohol / nano Si-TiO 2 Preparation of packaging materials: Add 3 g of polyvinyl alcohol (type 1797) powder into 97 mL of pure water, heat and stir at 95° C. for 2 hours, and cool to obtain a 3% polyvinyl alcohol aqueous solution. 0.04g nano-Si-TiO 2 And 0.08g dispersant polyethylene glycol 400 (PEG400) adds in the above-mentioned polyvinyl alcohol (PVA) aqueous solution and blends (Si-TiO 2 / PVA=2.67...

Embodiment 3

[0033] The present embodiment relates to a kind of preparation method of degradable nano antibacterial film, and it comprises the steps:

[0034] Nano-TiO Modified by Silane Coupling Agent 2 : 0.1g nano-TiO 2 (particle size of 100nm) and 0.01g of silane coupling agent (aminopropyltriethoxysilane, APS) were added to 10mL of acetone solution, ultrasonically coupled under the condition of ultrasonic power of 600W for 30 minutes, washed with pure water for 2 times, filtered, vacuum dried for 4h, and the dried product was ground into modified nano-TiO 2(Si-TiO 2 ). Polyvinyl alcohol / nano Si-TiO 2 Preparation of packaging materials: Add 3 g of polyvinyl alcohol (type 1797) powder into 97 mL of pure water, heat and stir at 95° C. for 2 hours, and cool to obtain a 3% polyvinyl alcohol aqueous solution. 0.04g nano-Si-TiO 2 Add 0.04g dispersant polyethylene glycol 400 (PEG400) into the above-mentioned polyvinyl alcohol (PVA) aqueous solution and blend (Si-TiO 2 / PVA=1.33wt%), und...

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Abstract

The invention provides a preparation method of a degradable nano bacteriostatic thin film. The preparation method comprises the following steps: preparing nano Si-TiO2; adding the nano Si-TiO2 and a dispersant into a degradable polymer water solution; uniformly mixing and degassing to obtain a film forming solution; carrying out film casting on the film forming solution to obtain the degradable nano bacteriostatic thin film. A preparation method of the nano Si-TiO2 comprises the following steps: dispersing nano TiO2 and a silane coupling agent into acetone; coupling under an ultrasonic condition; filtering, washing with water, drying in vacuum and grinding to prepare the nano Si-TiO2. Compared with the prior art, the preparation method of the degradable nano bacteriostatic thin film has the following beneficial effects that process steps are simple and the bacteriostatic (escherichia coli and staphylococcus aureus) effect of a packaging material is remarkable; the packaging material provided by the invention has the advantages of strong mechanical properties, small permeability and the like; the preparation method has the advantages of safe process operation, high efficiency and no toxin, greenness and environmental friendliness, easiness for popularization and the like.

Description

technical field [0001] The invention relates to a preparation method of a degradable nano antibacterial film, which belongs to the technical field of food packaging materials. Background technique [0002] At present, food safety has become the focus of public attention. In addition to food safety problems caused by harmful substances in the food chain, food safety problems caused by food packaging have also attracted increasing attention. In order to further improve the safety and quality of food packaging, we must seek a breakthrough from the packaging material itself to overcome the barriers encountered by packaging technology. In order to save energy, protect the environment and achieve sustainable development, the development of new biodegradable materials is the only way for food packaging. [0003] In terms of materials, existing food packaging includes ordinary plastic packaging (polyethylene, polypropylene, polyvinyl chloride, etc.), and new degradable packaging (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L29/04C08K9/06C08K3/22B65D65/46
CPCB65D65/466C08J5/18C08J2329/04C08K3/22C08K9/06C08K2003/2241C08K2201/003C08K2201/011C08L2201/06C08L2203/16C08L29/04Y02W90/10
Inventor 岳进查宝萍徐国斌尹浩王丹凤
Owner SHANGHAI JIAO TONG UNIV
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