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Water-blocking enhanced degradable antibacterial film as well as preparation method and application thereof

An enhanced, antibacterial film technology for sustainable manufacturing/processing, climate sustainability, sustainable packaging, etc., that solves problems such as short shelf life, failure to meet requirements to reduce plastic use, and no active additives

Inactive Publication Date: 2021-11-19
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the packaging materials on the market are still mainly plastics, and no more suitable active additives have been adopted. The main means of preservation is refrigeration, which does not meet the national requirements for reducing the use of plastics, and the shelf life is relatively short.

Method used

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  • Water-blocking enhanced degradable antibacterial film as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A degradable antibacterial film with enhanced water resistance, the inner layer is PLA and PBAT modified by composite antibacterial agent nano-zinc oxide-nano-sulfur, and the outer layer is coated with a layer of nano-SiO 2 , stearic acid, glutaraldehyde modified water-resistant barrier PVA coating sol, the specific steps of its preparation are as follows, including the following steps:

[0042] The first step is to weigh the raw materials of the composite antibacterial agent: 10g of nano zinc oxide of 30nm, 0.2g of titanate coupling agent TC-1140.2g, 10ml of isopropanol, and 10g of the second antibacterial agent are weighed according to the ratio of parts by mass. The second antibacterial agent is the nanometer sulfur of 50nm;

[0043] The second step: take 10g of nano-zinc oxide and place it in a vacuum drying oven, and fully dry it at 60°C for 12 hours;

[0044] Step 3: Take 0.2g of titanate coupling agent TC-114 and drop it into 10ml of isopropanol, heat to 50°C an...

Embodiment 2

[0061] A water blocking enhanced degradable antibacterial film, the inner layer is PLA and PBAT modified by antibacterial agent nano-zinc oxide-sodium dehydroacetate, and the outer layer is coated with a layer of nano-SiO 2 , stearic acid, glutaraldehyde modified water-resistant barrier PVA coating sol, the specific steps of its preparation are as follows:

[0062] The first step is to weigh the raw materials of the composite antibacterial agent: weigh 10g of nano-zinc oxide of 10-50nm, 0.3g of titanate coupling agent TC-1140.3g, 10ml of isopropanol, and the second antibacterial agent Sodium hydroacetate 10g;

[0063] Step 2: Take 10g of nano-zinc oxide and put it in a vacuum drying oven, and fully dry it at 60°C for 12 hours;

[0064] Step 3: Take 0.3g of titanate coupling agent TC-114 and drop into 10ml of isopropanol, heat to 50°C and stir, fully mix and dissolve;

[0065] Step 4: Take 10g of dried nano-zinc oxide and add it to the titanate coupling agent solution, stir e...

Embodiment 3

[0081] A degradable antibacterial film with enhanced water resistance, the inner layer is PLA and PBAT modified by the antibacterial agent nano-zinc oxide-thymol, and the outer layer is coated with a layer of nano-SiO 2 , stearic acid, glutaraldehyde modified water-resistant barrier PVA coating sol, the specific steps of its preparation are as follows:

[0082] The first step is to weigh the raw materials of the composite antibacterial agent: 10g of nano zinc oxide of 30nm, 0.2g of titanate coupling agent TC-1140.2g, 10ml of isopropanol, and 10g of the second antibacterial agent are weighed according to the ratio of parts by mass. The second antibacterial agent is Thymol;

[0083] Step 2: Take 10g of nano-zinc oxide and put it in a vacuum drying oven, and fully dry it at 60°C for 12 hours;

[0084] Step 3: Take 0.2g of titanate coupling agent TC-114 and drop it into 10ml of isopropanol, heat to 50°C and stir, fully mix and dissolve;

[0085] Step 4: Take 10g of dried nano-zi...

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Abstract

The invention discloses a water-blocking enhanced degradable antibacterial film and a preparation method and application thereof. The preparation method includes the steps that: a composite antibacterial agent, an antioxidant and a base material are mixed through a blending method; and granulation is conducted through an LTE16-40 double-screw extruder, a film is prepared through a tape casting method, so that a degradable antibacterial packaging film is obtained; a layer of polyvinyl alcohol (PVA) modified by nano SiO2, stearic acid and glutaraldehyde coats the obtained degradable antibacterial packaging film to obtain the water-resistant barrier degradable antibacterial packaging film. According to the method, the base material comprises 20-40 parts of polylactic acid (PLA) and 60-80 parts of poly (butylene adipate / terephthalate) (PBAT).

Description

technical field [0001] The invention belongs to the technical field of food active packaging materials, and in particular relates to a degradable antibacterial film with enhanced water resistance and its preparation method and application. Background technique [0002] Packaging materials are a crucial link in the packaging industry, and the current protection of the ecological environment is a major impetus to the development of the packaging industry. With the promulgation of the "Plastic Ban Order" in Shanghai and other regions, the government's control over plastic and other environmentally polluting materials is increasing. The packaging industry mainly based on plastic materials should actively respond to national policies. Therefore, active degradable packaging materials came into being. pregnancy. Active degradable packaging refers to selecting a material that can be degraded in a thermodynamic and kinetic sense for a period of time, and using it as a carrier to com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C08L67/02C08L67/04C08K9/04C08K3/22C08K3/06C08K5/1545C08K5/13C08J5/18C09D129/04C09D7/61C09D7/63B65D65/46
CPCC08J7/0427C08J5/18C09D129/04C09D7/61C09D7/63B65D65/466C08K9/04C08K2201/011C08K2003/2296C08K3/06C08K5/1545C08K5/13C08J2367/02C08J2467/04C08J2429/04C08K3/36C08K5/09C08K5/07Y02W90/10
Inventor 丘晓琳高书俊文弓雪峰王珂涵周熙春李鑫衡汪洋
Owner JIANGNAN UNIV
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