Preparation method of high magnification full biodegradable foaming material

A foaming material, all-biological technology, applied in the field of preparation of high-rate fully biodegradable foaming materials, can solve problems such as high foaming rate, low melt strength of polylactic acid resin, and difficulty in obtaining stable shape foamed products, etc. To achieve the effect of improving toughness

Inactive Publication Date: 2017-07-21
启迪再生资源科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the melt strength of polylactic acid resin is low, it is difficult to obtain foamed products with stable shape, and it is also difficult to obtain high expansion ratio
There are still technical difficulties in preparing polylactic acid foam materials with excellent performance through commercialized general-purpose polylactic acid resins
Since 2006, large international companies in Japan, the Netherlands, the United States and other countries have successfully realized the commercialization of polylactic acid foaming materials through new polylactic acid synthesis processes or through the modification of general-purpose polylactic acid resins, but still have not achieved comparative results. High expansion ratio
However, PLA and PBAT are incompatible, and there is obvious phase separation.
[0005] In the Chinese patent CN200910184047, it is disclosed that PBAT is used as a...

Method used

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  • Preparation method of high magnification full biodegradable foaming material

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preparation example Construction

[0013] The embodiment of the present invention provides a method for preparing a high-rate fully biodegradable foaming material, which can obtain a high-rate fully biodegradable foaming material, including the following steps:

[0014] After drying polylactic acid, reaction compatibilizer EC, polybutylene adipate / terephthalate and organically modified montmorillonite, each raw material is banburyed in an internal mixer to obtain a mixed modification Masterbatch;

[0015] The modified masterbatch is placed in the autoclave and injected with supercritical CO 2 As a foaming agent, it is melted and maintained under high pressure and high temperature. After melting and maintained, the temperature of the autoclave is lowered to the foaming temperature, and the pressure is released quickly after the temperature is stable. The foam density obtained after pressure relief is 0.0155-0.0205g / cm 3 , The product with a foaming ratio of 60 to 80 times is a high-power fully biodegradable foa...

Embodiment 1

[0033] The embodiment of the present invention provides a method for preparing a high-magnification fully biodegradable foaming material, comprising the following steps:

[0034] PLA was placed in an oven with a temperature of 75°C, EC, PBAT and OMMT were simultaneously placed in an oven with a temperature of 60°C, and kept at a constant temperature for 6 hours. The test formula was PLA / PBAT with a mass ratio of 80 / 20 and the amount of EC 5% (mass fraction) of the total weight of PLA and PBAT, and 3% (mass fraction) of the total weight of PLA and PBAT. Then this formula is carried out internal mixing in internal mixer, first EC and PLA / PBAT are added in internal mixer together, after EC and PLA / PBAT react 5min in internal mixer, add OMMT again, internal mixer temperature setting The temperature is 190°C, the rotation speed is set to 40r / min, and the time is set to 10min.

[0035] Then put the sample in the autoclave, and set the temperature of the autoclave to 170°C. After th...

Embodiment 2

[0037] The embodiment of the present invention provides a method for preparing a high-magnification fully biodegradable foaming material, comprising the following steps:

[0038]PLA was placed in an oven with a temperature of 75°C, EC, PBAT and OMMT were simultaneously placed in an oven with a temperature of 60°C, and kept at a constant temperature for 6 hours. The test formula was PLA / PBAT with a mass ratio of 80 / 20 and the amount of EC 7% (mass fraction) of the total weight of PLA and PBAT, and 3% (mass fraction) of the total weight of PLA and PBAT. Finally, each group of formulas is internally mixed in the internal mixer. First, EC and PLA / PBAT are added to the internal mixer together. After the EC and PLA / PBAT react in the internal mixer for 5 minutes, then OMMT is added. The internal mixer temperature Set it to 190°C, set the rotation speed to 40r / min, and set the time to 10min.

[0039] Then put the sample in the autoclave, and set the temperature of the autoclave to 17...

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Abstract

The invention discloses a preparation method of a high magnification full biodegradable foaming material, a blend of full biodegradable material polylactic acid (PLA) and full biodegradable material poly (butyleneadipate-co-terephthalate) (PBAT)/dibutyl phthalate is prepared by an internal mixer, at the same time, an epoxy chain extender is added as a reaction compatilizer EC, an organic modification montmorillonoid (OMMT) is added as a nucleating agent, then the prepared material is placed into a high pressure foaming kettle, supercritical CO2 is injected as a foaming agent, and rapid depressurization is performed to obtain the product with high foaming ratio after long-time high pressure maintaining. With the preparation method, the polylactic acid foaming material with the foam density of 0.0155-0.0205 g/cm3 and the foaming ratio of 60-80 times can be obtained. The prepared polylactic acid foaming material is high in foaming ratio, full biodegradable, green and environment-friendly and capable of replacing most packaging undegradable foamed plastic in a wide range.

Description

technical field [0001] The invention relates to the field of polymer material processing, in particular to a preparation method of a high-magnification fully biodegradable foaming material. Background technique [0002] Energy shortage and environmental pollution are the key issues restricting the sustainable development of China's economy and society. Traditional foamed plastic substrates such as polystyrene, polyurethane, etc., because of their poor mechanical properties and physical properties, or are thermosetting plastics, cannot be easily recycled, so that many applications are greatly restricted, and the pollution to the environment is relatively high. serious. With the increasing calls for global environmental protection and the promotion of sustainable development strategies, the concept of green has gradually become popular. Polylactic acid (PLA) has three characteristics that are different from other thermoplastic polymer materials, namely, it comes from renewabl...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L67/02C08K9/04C08K3/34C08J9/12
CPCC08L67/04C08J9/122C08J2203/06C08J2367/04C08J2467/02C08L2201/06C08L2203/14C08L2205/02C08L67/02C08K9/04C08K3/346
Inventor 刘焕萍王军刘吉波冯清正李锋铎
Owner 启迪再生资源科技发展有限公司
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