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Preparation of high-barrier nano modified PET composite material for packaging products

A technology of nano-modification and composite materials, applied in the field of materials, can solve problems such as high cost, difficult product recycling, complex processing technology, etc., and achieve good processing performance, easy processing and recycling.

Active Publication Date: 2017-01-25
GUANGDONG NANOLUTION SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In existing research and patents, multi-layer methods are usually used to improve the barrier properties of PET, such as adding barrier layers in PET bottles or using surface coating methods. Although this method improves barrier properties, the processing technology is complicated and the product is recycled. Difficult and relatively high cost, becoming a bottleneck for large-scale application promotion

Method used

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  • Preparation of high-barrier nano modified PET composite material for packaging products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Step 1) Preparation of modified graphene: soak 5-10 layers of graphene in 0.1% sodium dodecylsulfonate aqueous solution for 24 hours, and vacuum dry at 50° C. for 48 hours to obtain modified graphene.

[0026] Step 2) preparation of graphene / PET composite material by in-situ polymerization: first the modified graphene obtained in step 1) is ultrasonically dispersed in ethylene glycol, and the ethylene glycol solution of modified graphene of 0.1mg / ml is prepared , Synthesis of graphene / PET composites by transesterification. The specific preparation process is as follows: First, nitrogen gas is passed through the four-necked bottle for 30 minutes, then terephthalic acid ester and ethylene glycol are added to the four-necked bottle at a molar ratio of 1:2, and terephthalic acid ester is added to add mass of 0.03% transesterification catalyst Zn(OAc) 2 , under the protection of nitrogen, the temperature was raised to 200 ° C, after the terephthalate was completely dissolve...

Embodiment 2

[0029] Step 1) Preparation of modified graphene: soak 5-10 layers of graphene in an aqueous solution of polyvinylpyrrolidone with a mass concentration of 0.1% for 24 hours, and vacuum-dry at 50° C. for 48 hours to obtain modified graphene.

[0030] Step 2) preparation of graphene / PET composite material by in-situ polymerization: first the modified graphene obtained in step 1) is ultrasonically dispersed in ethylene glycol, and the ethylene glycol solution of modified graphene of 0.15mg / ml is prepared , Synthesis of graphene / PET composites by transesterification. The specific preparation process is as follows: First, nitrogen gas is passed through the four-necked bottle for 30 minutes, then terephthalic acid ester and ethylene glycol are added to the four-necked bottle at a molar ratio of 1:2, and terephthalic acid ester is added to add mass of 0.05% transesterification catalyst Zn(OAc) 2 , under the protection of nitrogen, the temperature was raised to 200 ° C, after the tere...

Embodiment 3

[0033] Step 1) Preparation of modified graphene: soak 5-10 layers of graphene in 0.1% cetyltrimethylammonium bromide aqueous solution for 24 hours, and vacuum dry at 50° C. for 48 hours to obtain modified graphene.

[0034] Step 2) Preparation of graphene / PET composite material by melt blending method: first, put the PET masterbatch and the modified graphene powder obtained in step 1) into a drying oven, and dry at 100°C. Then the modified graphene powder of PET masterbatch and 0.3wt% of the total weight of the composite material is placed in a dry mixer and mixed uniformly, and the mixed material is added to the mixer to be melted and kneaded and then extruded to prepare A nano-modified PET composite material is obtained.

[0035] Step 3) The graphene-modified PET composite material obtained in step 2) is prepared into a single-layer high-barrier packaging product through processing techniques such as a one-step blow molding method or a two-step blow molding method.

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Abstract

The invention relates to the technical field of materials, and particularly discloses preparation of a high-barrier nano modified PET composite material for packaging products. The preparation comprises the following steps: step (1) preparation of a modified nano material: treating 5 to 10 layers of graphene or white graphene by using a surfactant, thus obtaining modified nano material powder; step (2) preparing the nano modified PET composite material through an in-situ polymerization method or a melt blending method. According to the preparation of the high-barrier nano modified PET composite material, disclosed by the invention, the graphene, oxidized graphene or the white graphene has good gas isolation performance and high strength, and by adding a small amount (0.01 weight percent to 0.5 weight percent) of the graphene, the oxidized graphene or the white graphene, the barrier property of PET can be increased by a large margin, but other properties are not influenced; a prepared PET composite material product has good processing performance, and can be further prepared into single-layer-structure packaging bottles, and processing and recycling are more convenient.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to the preparation of a high-barrier nano-modified PET composite material for packaging products. Background technique [0002] PET polyester has the characteristics of excellent appearance, high mechanical strength, good chemical resistance, non-toxic and tasteless, low cost, easy molding and recyclability, etc., and is widely used in daily life, such as PET bottles (various beverages especially It is the packaging of carbonated beverages), PET film (often used as the outer material of retort packaging), PET bags and PET packaging cans, etc. However, with the improvement of the market's packaging requirements and the development of the beverage industry, ordinary PET products have gradually been unable to meet some special requirements due to lack of barrier properties, such as carbonated beverages, high-concentration fruit juices, fresh fruit and vegetable juices, and beer. It ...

Claims

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Application Information

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IPC IPC(8): C08G63/183C08G63/78C08K9/04C08K7/00C08K3/04C08L67/02B65D65/38
CPCB65D65/38C08G63/183C08G63/78C08K3/04C08K7/00C08K9/04C08K2201/014C08L2201/14C08L67/02Y02W30/80
Inventor 段曦东赵涛楠毛志浩
Owner GUANGDONG NANOLUTION SCI & TECH CO LTD
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