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Preparation method and application of high-melting-point PBAT foam

A technology with high melting point and foam, which is applied in the field of foaming materials, can solve the problems of poor mechanical properties and thermal properties, and achieve the effect of improving performance, good physical properties and mechanical properties, and increasing specific surface area

Pending Publication Date: 2022-01-21
广东舜天新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, due to its excellent mechanical properties, non-toxicity, good chemical compatibility and biodegradability, polylactic acid foam is used as a postoperative drug carrier, sterilized sponge, tissue scaffold, etc. Foamed materials, however, degradable saturated fat polyesters generally exhibit the disadvantages of poor mechanical and thermal properties

Method used

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  • Preparation method and application of high-melting-point PBAT foam
  • Preparation method and application of high-melting-point PBAT foam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of high melting point PBAT foam comprises the following steps:

[0026] S1: Glyceryl stearate and PBAT were dissolved in chloroform, and the chloroform was volatilized at 18°C ​​to prepare a modified PBAT material.

[0027] S2: Place the PBAT material and NPCC prepared in step 1 in an oven at 60°C and 100°C to dry for 6 hours to remove excess moisture on the surface of the raw materials, and then put PBAT and NPCC in a certain proportion in the internal mixer Mix to obtain the composite material of PBAT and NPCC, the temperature of the internal mixer is 190°C, the time of banburying is 10min, and the rotating speed of banburying is 60r / min, and the NPCC is specifically NPCC-201, and the particle density is 2.5g / cm 3 , the average particle size and surface area are 30nm and 40m 2 / g.

[0028] S3: Put the composite material of PBAT and NPCC obtained in step 2 into the autoclave for intermittent foaming, and use supercritical CO during the foaming...

Embodiment 2

[0038] The preparation method of high melting point PBAT foam comprises the following steps:

[0039] S1: Glyceryl stearate and PBAT were dissolved in chloroform, and the chloroform was volatilized at 18°C ​​to prepare a modified PBAT material.

[0040] S2: Place the PBAT material and NPCC prepared in step 1 in an oven at 50°C and 90°C to dry for 6 hours to remove excess moisture on the surface of the raw material, and then put PBAT and NPCC in a certain proportion in the internal mixer Mix to obtain the composite material of PBAT and NPCC, the temperature of the internal mixer is 190°C, the time of banburying is 10min, and the rotating speed of banburying is 60r / min, and the NPCC is specifically NPCC-201, and the particle density is 2.5g / cm 3 , the average particle size and surface area are 15nm and 40m 2 / g.

[0041] S3: Put the composite material of PBAT and NPCC obtained in step 2 into the autoclave for intermittent foaming, and use supercritical CO during the foaming pro...

Embodiment 3

[0051] The preparation method of high melting point PBAT foam comprises the following steps:

[0052] S1: Glyceryl stearate and PBAT were dissolved in chloroform, and the chloroform was volatilized at 25° C. to prepare a modified PBAT material.

[0053] S2: Place the PBAT material and NPCC prepared in step 1 in an oven at 50°C and 90°C to dry for 8 hours to remove excess moisture on the surface of the raw materials, and then put PBAT and NPCC in a certain proportion in the internal mixer Mix to obtain the composite material of PBAT and NPCC, the temperature of the internal mixer is 190°C, the time of banburying is 10min, and the rotating speed of banburying is 60r / min, and the NPCC is specifically NPCC-201, and the particle density is 2.6g / cm 3 , the average particle size and surface area are 20nm and 40m 2 / g.

[0054] S3: Put the composite material of PBAT and NPCC obtained in step 2 into the autoclave for intermittent foaming, and use supercritical CO during the foaming ...

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Abstract

The invention discloses a preparation method and application of high-melting-point PBAT foam, and the preparation method comprises the following steps of: respectively placing a PBAT material and NPCC in drying ovens of 50-60DEG C and 90-100DEG C for drying for 6-8 hours so as to remove redundant moisture on the surface of the raw material, mixing PBAT and NPCC in an internal mixer according to a certain proportion to obtain a PBAT and NPCC composite material, putting PBAT and NPCC composite material into a high-pressure reaction kettle for intermittent foaming, injecting 20MPa supercritical CO2 as physical foaming gas at 120-150DEG C in the foaming process, maintaining the state for 4-5 hours, and quickly releasing the pressure to atmospheric pressure after the foaming agent gas is fully diffused and dissolved in the PBAT and NPCC composite material, thus changing the CO2 dissolved in the PBAT matrix from a supercritical state to a gaseous state and foaming the CO2. According to the preparation method and application of the high-melting-point PBAT foam, the prepared PBAT foam has good physical properties and mechanical properties, and the degradability of the PBAT foam is reserved.

Description

technical field [0001] The invention relates to the technical field of foaming materials, in particular to a preparation method and application of high melting point PBAT foam. Background technique [0002] With the promotion of plastic ban and plastic restriction policies in various provinces and cities in China, degradable polymer materials are playing an increasingly important role in the market. In order to alleviate white pollution, PBAT foam is used as a kind of The development and application of similar materials are of great significance to the sustainable development of our country. [0003] In recent years, the rapid development of polymer foaming molding methods and new green degradable materials synthesis technology has played an important role in the production and life of polymer foam materials and shows a new trend that is to use green degradable polymers as substrates to prepare foaming material. The application of new degradable polymer foaming materials i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K5/103C08K3/26C08J9/12
CPCC08J9/122C08J9/008C08J9/0023C08J9/0095C08J2367/02C08J2203/06C08J2203/08C08K2201/011C08K2003/265C08K5/103
Inventor 缪永建冷先勇冷秉冬徐胜军冷先强
Owner 广东舜天新材料有限公司
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