PHBV microcellular foam material and preparation method thereof

A microporous foam material and cell technology, applied in the field of foam materials, can solve the problems of high crystallinity, restricting the foamability of PHBV materials, etc., and achieve the effect of uniform distribution of cells and protection of the ecological environment

Active Publication Date: 2020-07-03
宁波致微新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The characteristics of the PHBV material itself, such as high crystallinity and large spherulites, restrict the foamability of the PHBV material. At present, there are no literature reports at home and abroad on the PHBV microcellular foam material with uniform cell diameter and high cell density.

Method used

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  • PHBV microcellular foam material and preparation method thereof
  • PHBV microcellular foam material and preparation method thereof
  • PHBV microcellular foam material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0055] Example 1: According to the above-mentioned preparation method, firstly, PHBV-1 powder was used to prepare PHBV-1 sheet through an extruder, and the thickness of the sheet was 2mm.

[0056] Step 1: Put the PHBV-1 sheet in a pressure vessel and seal it tightly, raise the temperature to 175°C, and keep the saturation pressure at 20MPa for 30 minutes;

[0057] Step 2: Then keep the foaming temperature at 149°C for 90 minutes;

[0058] Step 3: Depressurize the pressure vessel to prepare a PHBV microporous foam material with a depressurization rate of 200 MPa / s.

Embodiment 2

[0059] Embodiment 2: use the PHBV-1 sheet that embodiment 1 prepares, foaming process comprises the following steps:

[0060] Step 1: At a saturation temperature of 177°C and a saturation pressure of 20MPa, keep the treatment for 40 minutes;

[0061] Step 2: Then keep the foaming temperature at 153°C for 30 minutes;

[0062] Step 3: Depressurize the pressure vessel to prepare a PHBV microporous foam material with a depressurization rate of 200 MPa / s.

Embodiment 3

[0063] Embodiment 3: use the PHBV-1 sheet that embodiment 1 prepares, foaming process comprises the following steps:

[0064] Step 1: At a saturation temperature of 174°C and a saturation pressure of 20MPa, keep the treatment for 30 minutes;

[0065] Step 2: Then keep the foaming temperature at 157°C for 30 minutes;

[0066] Step 3: Depressurize the pressure vessel to prepare a PHBV microporous foam material with a depressurization rate of 200 MPa / s.

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Abstract

The invention relates to the technical field of foam materials, in particular to a PHBV microcellular foam material and a preparation method thereof. The PHBV microcellular foam material is prepared from a PHBV composition through a foaming process, wherein the weight percentage of PHBV used in the PHBV composition is 90-100%, the weight-average molecular weight of the used PHBV is 30000-350000, and the molar content of hydroxyvalerate is 1-20 mol%. A two-step foaming method is adopted in the invention. The prepared foam material is small in pore diameter and large in pore density, and a foundation is provided for application of PHBV.

Description

technical field [0001] The invention relates to the technical field of foaming materials, in particular to a PHBV microporous foaming material and a preparation method thereof. Background technique [0002] At present, foam materials have become an indispensable chemical product in our life and industrial and agricultural production. Traditional foam materials are mainly based on petroleum-based polymer materials. However, petroleum-based polymer materials are not only non-renewable resources, but also cannot be naturally degraded by microorganisms, which brings a huge burden to the ecological environment and causes serious white pollution problems. Therefore, it is very important to study biodegradable polymer foam materials to solve the existing environmental problems. [0003] Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV for short) is a completely biodegradable copolymer of polyhydroxybutyrate and polyhydroxyvalerate, which is synthesized by bacterial fermentation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08J9/12
CPCC08J9/122C08J9/0061C08J2203/06C08J2203/08C08J2367/04C08J2467/04
Inventor 闫海阔赵玲吴明艳
Owner 宁波致微新材料科技有限公司
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