Degradable food preservation pad capable of inhibiting bacteria, preventing vibration and absorbing moisture, and preparation method thereof

A food preservation and antibacterial agent technology, applied in the field of foamed plastics, can solve problems such as loading antibacterial agents, and achieve the effects of reducing spoilage, inhibiting growth and reproduction, and ensuring freshness

Active Publication Date: 2020-03-06
SHANGHAI OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The role of halloysite nanotubes in this invention is the reinforcing material of the packaging film to enhance the physical properties of the film, and does not involve the function of loading antibacterial agents

Method used

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  • Degradable food preservation pad capable of inhibiting bacteria, preventing vibration and absorbing moisture, and preparation method thereof
  • Degradable food preservation pad capable of inhibiting bacteria, preventing vibration and absorbing moisture, and preparation method thereof
  • Degradable food preservation pad capable of inhibiting bacteria, preventing vibration and absorbing moisture, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A preparation method of a bacteriostatic, shockproof and moisture-absorbing degradable food preservation mat, comprising the following steps:

[0051] (1) Dry the PLA granules and starch in an oven at 65°C for 4 hours, and mix them evenly according to the weight ratio after cooling to obtain mixed granules;

[0052] (2) Mix the AC foaming agent, the HNTs-nano Ag composite material and the compatibilizer evenly according to the weight ratio, then pour them into a beaker containing the mixed particles, stir and mix them evenly, and obtain the mixed material;

[0053] (3) Put the mixed material into the twin-screw extruder and extrude foaming. The processing temperatures of zones 1 to 7 of the twin-screw extruder are 145°C, 155°C, 160°C, 175°C, 175°C, 165°C, 150°C, the twin-screw speed is 200r / min, after cooling and shaping, the antibacterial PLA / starch foaming material is obtained;

[0054] (4) natural antibacterial agent is dissolved in distilled water, is made into the...

Embodiment 2

[0070] A preparation method of a bacteriostatic, shockproof and moisture-absorbing degradable food preservation mat, comprising the following steps:

[0071] (1) Dry the PLA granules and starch in an oven at 65°C for 4 hours, and mix them evenly according to the weight ratio after cooling to obtain mixed granules;

[0072](2) After mixing the AC foaming agent, HNTs-cinnamaldehyde composite material, HNTs-citral composite material and compatibilizer uniformly according to the weight ratio, pour them into a beaker containing the mixed particles, stir and mix to obtain the mixed material;

[0073] (3) Put the mixed material into the twin-screw extruder and extrude foaming. The processing temperatures of zones 1 to 7 of the twin-screw extruder are 145°C, 155°C, 160°C, 175°C, 175°C, 165°C, 150°C, the twin-screw speed is 280r / min, after cooling and shaping, the antibacterial PLA / starch foaming material is obtained;

[0074] (4) join chitosan and clove essential oil in the aqueous a...

Embodiment 3

[0090] A preparation method of a bacteriostatic, shockproof and moisture-absorbing degradable food preservation mat, comprising the following steps:

[0091] (1) Dry the PLA granules and starch in an oven at 65°C for 4 hours, and mix them evenly according to the weight ratio after cooling to obtain mixed granules;

[0092] (2) AC blowing agent, HNTs-nano TiO 2 The composite material, the HNTs-sorbic acid composite material, the HNTs-nano Ag composite material, and the compatibilizer are uniformly mixed according to the weight ratio, and then poured into a beaker containing the mixed particles, stirred and mixed to obtain a mixed material;

[0093] (3) Put the mixed material into the twin-screw extruder and extrude foaming. The processing temperatures of zones 1 to 7 of the twin-screw extruder are 145°C, 155°C, 160°C, 175°C, 175°C, 165°C, 150°C, the twin-screw speed is 280r / min, after cooling and shaping, the antibacterial PLA / starch foaming material is obtained;

[0094] (4)...

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Abstract

The invention provides a degradable food preservation pad capable of inhibiting bacteria, preventing vibration and absorbing moisture as well as a preparation method thereof. The preparation method ofthe degradable food preservation pad capable of inhibiting bacteria, preventing vibration and absorbing moisture comprises the following steps: spraying a natural antibacterial agent onto surface ofan antibacterial polylactic acid (PLA) / starch foamed material; and then, coating the antibacterial PLA / starch foamed material with a perforated polylactic acid film, thereby obtaining the degradable food preservation pad capable of inhibiting bacteria, preventing vibration and absorbing moisture. The degradable food preservation pad capable of inhibiting bacteria, preventing vibration and absorbing moisture provided by the invention has both internal and external antibacterial effects, so that an internal antibacterial agent can be slowly released while an external antibacterial agent rapidlyfunctions by volatilization or contact with a food; and thus, the degradable food preservation pad synchronously has timely antibacterial effects and long-lasting antibacterial effects. The degradablefood preservation pad capable of inhibiting bacteria, preventing vibration and absorbing moisture has broad-spectrum antibacterial capability, and is capable of inhibiting propagation of microorganisms, reducing food spoilage and prolonging product storage lives; and moreover, the degradable food preservation pad also has water absorbing and vibration preventing effects, so that quality of the products can be ensured. In addition, the degradable food preservation pad capable of inhibiting bacteria, preventing vibration and absorbing moisture provided by the invention is an all biodegradable material which is green, safe and environment friendly; and thus, the degradable food preservation pad has very broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of foamed plastics, and in particular relates to a degradable food fresh-keeping pad with antibacterial, shockproof and moisture absorption properties and a preparation method thereof. Background technique [0002] At present, my country's logistics and transportation system is not perfect, and the fresh-keeping technology applied to the market is relatively simple. The contradiction between the ever-increasing production of fresh food and insufficient, unsupported and imperfect fresh-keeping techniques has gradually become prominent. Taking pork as an example, the "Analysis of China's Pork Circulation Loss" released by the Ministry of Agriculture shows that the loss rates of pork in the three links of storage, transportation and sales are 3.98%, 0.24% and 1.46% respectively; 1 billion tons, but the loss rate is close to 20%, which is five times that of developed countries. The output value of fruit and veg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/36B32B3/24B32B27/06B32B27/22B32B27/18B32B9/00B32B9/04B32B33/00C08J9/36C08J9/10C08L67/04C08L3/02C08K13/06C08K9/12C08K5/11C08K5/1515C08K5/092C08K5/1539C08K3/08C08K5/07C08K3/22C08K5/09C09D5/14C09D105/08C09D191/00
CPCB32B27/36B32B3/266B32B27/065B32B5/18B32B27/22B32B27/18B32B9/00B32B9/045B32B33/00C08J9/365C08J9/103C08J9/0061C08J9/009C08J9/0095C08J9/0023C08J9/0071C09D5/14B32B2266/0264B32B2307/7145B32B2307/716C08J2203/04C08J2367/04C08J2403/02C08J2405/08C08J2491/00
Inventor 李立李逸康勇锋施文正樊敏
Owner SHANGHAI OCEAN UNIV
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