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Biodegradable composite with barrier property and preparation method and applications thereof

A technology of biodegradation and biodegradation of polyester, applied in the field of biodegradable composition and its preparation, can solve the problems of inability to recycle, low recycling value, difficult to separate, etc., and achieve good water vapor barrier and good biodegradation performance Effect

Inactive Publication Date: 2015-08-12
夏世勇
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the commonly used materials with excellent barrier properties in industry mainly include polyvinyl alcohol (PVA), ethylene-vinyl alcohol copolymer (EVOH), nylon (PA), polyvinylidene chloride (PDVC), aluminum foil, etc., but although these materials Excellent barrier properties, but not biodegradable
Barrier composite films commonly used in the market today are almost all composite films composed of PE, PP, PET and barrier materials. These composite films are almost impossible to recycle after use, and it is difficult to separate different materials when they are combined together, so the recycling value is very low. , serious environmental pollution

Method used

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  • Biodegradable composite with barrier property and preparation method and applications thereof
  • Biodegradable composite with barrier property and preparation method and applications thereof
  • Biodegradable composite with barrier property and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-12 and comparative example 1-6

[0064] Examples 1-12 and Comparative Examples 1-6: Preparation of biodegradable compositions with barrier properties

[0065] Dry the weighed raw materials in an oven at 80°C for 5 hours in advance according to the formula ratio in Table 1, then stir in a high-speed mixer for 5 minutes to 10 minutes at a low speed, and then leave after stirring at a high speed for 3 minutes to 5 minutes, and mix well The material is fed into a twin-screw extruder, extruded and granulated at a temperature of 60°C-240°C to obtain a biodegradable composition with barrier properties; wherein, the diameter of the extruder is 40mm, and the aspect ratio is 36: 1. There are 9 heating zones and a vacuum exhaust device. The following operating conditions are selected for the extrusion process:

[0066] Temperature setting: 80°C / 150°C / 190°C / 190°C / 190°C / 190°C / 190°C / 190°C / 170°C;

[0067] Feeding speed: 100kg / h;

[0068] Screw speed: 300rpm;

[0069] Vacuum pressure: 0.4 atmospheres.

[0070] The resul...

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Abstract

The invention discloses a biodegradable composite with a barrier property, which comprises the following components in percentage by weight: 0.1-10 % (preferably 1-8 %) of a waterproofing agent, and 90-99.9 % (preferably 92-99 %) of biodegradable polyester, wherein the boiling point of the waterproofing agent is greater than or equal to 160 DEG C, and the HLB value is less than or equal to 10. According to the invention, the biodegradable composite prepared by adding a specific amount of the waterproofing agent with a boiling point of greater than or equal to 160 DEG C and an HLB value of less than or equal to 10 into the biodegradable polyester not only has good biodegradability, but also has a good water-vapor barrier property, therefore, the biodegradable composite can be widely applied to the fields of packaging and agricultural plastic mulching films.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a biodegradable composition with barrier properties and its preparation method and application. Background technique [0002] General-purpose plastics are widely used in various fields due to their excellent comprehensive properties. They are listed as the four major support materials along with steel, wood, and cement, and their annual usage continues to rise. General-purpose plastics such as polyethylene (PE), polypropylene (PP) and polystyrene (PS) can exist stably in nature for a long time and are difficult to degrade. Therefore, they are difficult to recycle after they are discarded, causing serious pollution to the environment. Biodegradable plastics have become one of the effective ways to solve the problem of plastic waste environmental pollution because of their rapid degradation in the natural environment, which has attracted people's attention, and countries all over t...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L67/04C08L83/06C08L23/20C08K5/103C08K5/12C08K5/01
Inventor 夏世勇
Owner 夏世勇
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