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Waterproof starch film using epoxy soybean oil acrylate as coating and preparation method thereof

An oil acrylate, epoxy soybean technology, applied in the direction of coating, sustainable manufacturing/processing, flexible covering, etc., can solve the limitation of waterproof coating application, coating and starch film detachment, difference in hydrophilic and hydrophobic properties, etc. problems, to achieve the effect of improving service life, improving transparency, and strong mechanical properties

Inactive Publication Date: 2019-11-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at this stage, there is almost no research on applying hydrophobic coatings to hydrophilic whole starch-based membrane materials. This is due to the difference in hydrophilic and hydrophobic properties between the two, which easily leads to poor compatibility at the interface, and the resulting Micro cracks make it easier for water molecules to penetrate, and the penetration of water molecules can easily cause the coating to separate from the starch film, thus limiting the application of waterproof coatings on hydrophilic materials

Method used

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  • Waterproof starch film using epoxy soybean oil acrylate as coating and preparation method thereof
  • Waterproof starch film using epoxy soybean oil acrylate as coating and preparation method thereof
  • Waterproof starch film using epoxy soybean oil acrylate as coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A kind of waterproof starch film is coated with epoxy soybean oil acrylate, is prepared by the following steps:

[0033] (1) Preparation and pretreatment of the whole starch film material: a haake twin-screw extruder (rheomex ptw24 / 40p, Screw diameter D=24mm, screw length L=28D), tapioca starch raw material is put into feed port, extrudes and makes tapioca film material. The extruder barrel has eight temperature control zones, each temperature is 40°C, 60°C, 90°C, 120°C, 120°C, 100°C, 95°C. The extruded film is collected by a traction device, and the thickness of the extruded film is about 0.2mm. The resulting starch film material was placed on a desiccator tray at room temperature (57% RH saturated saline solution was installed below the desiccator tray) for 2 days to achieve moisture balance. Then clean the dust on the surface of the starch film material with ethyl acetate solution, and dry it for subsequent use;

[0034] (2) Preparation of photocuring solution sy...

Embodiment 2

[0037] A kind of waterproof starch film is coated with epoxy soybean oil acrylate, is prepared by the following steps:

[0038] (1) Preparation and pretreatment of the whole starch film material: a haake twin-screw extruder (rheomex ptw24 / 40p, Screw diameter D=24mm, screw length L=28D), put the cornstarch raw material into the feeding port, extrude and make the cornstarch film material. The extruder barrel has eight temperature control zones, each temperature is 40°C, 60°C, 90°C, 120°C, 120°C, 100°C, 95°C. The extruded film is collected by a traction device, and the thickness of the extruded film is about 0.30mm. The resulting starch film material was placed on a desiccator tray at room temperature (57% RH saturated saline solution was installed below the desiccator tray) for 2 days to achieve moisture balance. Then clean the dust on the surface of the starch film material with ethyl acetate solution, and dry it for subsequent use;

[0039] (2) Preparation of photocuring s...

Embodiment 3

[0042] A kind of waterproof starch film is coated with epoxy soybean oil acrylate, is prepared by the following steps:

[0043] (1) Preparation and pretreatment of the whole starch film material: a haake twin-screw extruder (rheomex ptw24 / 40p, Screw diameter D=24mm, screw length L=28D), put the hydroxypropyl cornstarch raw material into the feeding port, and extrude to make the hydroxypropyl cornstarch film material. The extruder barrel has eight temperature control zones, each temperature is 40°C, 60°C, 90°C, 120°C, 120°C, 100°C, 95°C. The extruded film is collected by a traction device, and the thickness of the extruded film is about 0.25mm. The resulting starch film material was placed on a desiccator tray at room temperature (57% RH saturated saline solution was installed below the desiccator tray) for 2 days to achieve moisture balance. Then clean the dust on the surface of the starch film material with ethyl acetate solution, and dry it for subsequent use;

[0044] (...

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Abstract

The invention discloses a waterproof starch film taking epoxy soybean oil acrylate as a coating and a preparation method thereof, belonging to the technical field of packaging materials. The waterproof starch film is prepared by taking a full starch-based film material as a core layer, and forming an epoxy soybean oil acrylate coating on both sides of the core layer by adopting a light curing coating combined with an interface modifier; the epoxy soybean oil acrylate coating is prepared by preparing epoxy soybean oil acrylate, a photoinitiator and the interface modifier into a photocuring solution in a solvent, and surface coating is performed by coating the starch film layer with the photocuring solution. The waterproof starch film prepared by the invention has good mechanical performance, transparency and waterproof performance, and has the advantages of good adhesion between the coating and the film, good controllability, environmental protection and safety, simple and convenient preparation process, low cost and the like.

Description

technical field [0001] The invention relates to a waterproof starch film, in particular to a waterproof starch film coated with epoxy soybean oil acrylate and a preparation method thereof; the waterproof starch film is mainly used as a packaging material. Background technique [0002] Starch-based materials are cheap, have good biocompatibility and biodegradability, and have been used in drug delivery, packaging and agriculture. With the country's emphasis on environmental protection, starch-based degradable packaging materials have become the focus of attention. However, in the fresh-keeping packaging process of food, in addition to the moisture generated by the external environment, the food in the packaging box will also generate moisture. If the whole starch film is directly used for packaging, due to the strong hydrophilicity of the starch molecules, it will easily make the starch The base material is affected by moisture, resulting in certain performance defects, espe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C08J5/18C09D191/00C09D7/63B65D65/42C08L3/02C08L3/08
CPCB65D65/42C08J5/18C08J2303/02C08J2303/08C08J2491/00C09D7/63C09D191/00C08K5/544C08K5/5435Y02W90/10
Inventor 刘宏生陈霞余龙阁宵艳潘博卢凯字画
Owner SOUTH CHINA UNIV OF TECH
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