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Modified polyester material and preparation method of modified polyester material

A technology for modifying polyester and hydroxybutyrate, applied in the field of natural polymer materials, can solve problems such as poor mechanical properties of polyhydroxybutyrate, and achieve the effects of excellent mechanical properties, improved mechanical properties and low cost

Inactive Publication Date: 2016-01-20
SOUTHWEST UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a modified polyester material for the problem of poor mechanical properties of polyhydroxybutyrate in the prior art

Method used

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  • Modified polyester material and preparation method of modified polyester material
  • Modified polyester material and preparation method of modified polyester material

Examples

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preparation example Construction

[0030] Simultaneously, the present invention also provides the preparation method of above-mentioned modified polyester material, comprises the following steps:

[0031] S1, mixing poly(3-hydroxybutyrate-co-4-hydroxybutyrate) with konjac fly powder to obtain a blend; in the blend, use the poly(3-hydroxybutyrate -co-4-hydroxybutyrate) content as a benchmark, the content of the konjac powder is below 30wt%;

[0032] S2. Banburying the blend in a banbury mixer to obtain a solid mixture; the technical conditions of banbury mixing are as follows: the temperature is 140-220°C, the rotation speed is 10-120rpm, and the time is 1-30min;

[0033] S3. The solid mixture is subjected to thermocompression composite molding on a hot press, and then vacuum-dried at 60° C. for 12-72 hours to obtain the modified polyester material: the process conditions of the thermocompression composite molding are: the temperature is 140- 160°C, pressure 10-60MPa, time 1-15min.

[0034] According to the pr...

Embodiment 1

[0044] This example is used to illustrate the modified polyester material disclosed in the present invention and its preparation method.

[0045] 1) According to 5 parts of konjac flying powder and 100 parts of P(3,4)HB (provided by Tianjin Guoyun Biomaterials Co., Ltd.), select konjac flying powder, P(3,4)HB, and konjac flying powder and P( 3,4) Preliminary mixing of HB to obtain a blend;

[0046] 2) Then banbury the blend in an internal mixer (China Changzhou Suyan Technology Co., Ltd., the following examples are the same): the temperature is 140°C, the rotation speed is 48rpm, and the time is 10min to obtain a solid mixture;

[0047] 3) Then, the solid mixture after banburying is subjected to hot-compression compound molding on a hot press (Wuhan Qien Technology Development Co., Ltd., the following examples are the same): the temperature is 160°C, the pressure is 10MPa, and the time is 10min; molding Then vacuum-dry at 40° C. for 12 hours to remove moisture to obtain modif...

Embodiment 2

[0049] This example is used to illustrate the modified polyester material disclosed in the present invention and its preparation method.

[0050] 1) According to 10 parts of konjac flying powder and 100 parts of P(3,4)HB (provided by Tianjin Guoyun Biomaterials Co., Ltd.), select konjac flying powder, P(3,4)HB, and konjac flying powder and P( 3,4) Preliminary mixing of HB to obtain a blend;

[0051] 2) Then banbury the blend in an internal mixer: the temperature is 140°C, the rotation speed is 48rpm, and the time is 10min to obtain a solid mixture;

[0052] 3) The solid mixture after banburying is then subjected to hot-compression composite molding on a hot press: the temperature is 160°C, the pressure is 10MPa, and the time is 10min; after molding, it is vacuum-dried at 40°C for 12h to remove moisture and obtain a modified polyester Material S2.

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Abstract

In order to solve the problem of poor mechanical property of polyhydroxybutyrate in the prior art, the invention provides a modified polyester material, which comprises konjak fly powder and poly-(3-polyhydroxybutyrate-co-4-polyhydroxybutyrate), wherein the content of the poly-(3-polyhydroxybutyrate-co-4-polyhydroxybutyrate) is used as the reference; the content of the konjak fly powder is less than 30 weight percent. Meanwhile, the invention also provides a preparation method of the modified polyester material. The modified polyester material provided by the invention has the advantages that the mechanical property is good, and the application range of polyhydroxybutyrate in the material field is greatly expanded.

Description

technical field [0001] The invention belongs to the field of natural polymer materials, and in particular relates to a modified polyester material and a preparation method thereof. Background technique [0002] Biodegradable materials are materials that can be degraded into low-molecular substances that are harmless to the environment through photodegradation, chemical degradation, biodegradation, etc., and have good practical performance. It is a method to solve environmental problems. [0003] Biodegradable materials include natural materials and synthetic materials. Natural materials include starch, cellulose, chitin and their derivatives. Biodegradable synthetic materials usually contain hydrolyzable functional groups (such as: ester bonds, urea bonds, amide bonds, ether bonds, etc.) etc.), such as polyhydroxybutyrate, polylactic acid, polybutylene succinate, polycaprolactone, etc. [0004] Among them, polyhydroxybutyrate is a kind of degradable polyester synthetic mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L3/02C08L89/00C08K5/17B29B7/28B29C43/58
Inventor 黄进刘昌华陈兆曙林宁
Owner SOUTHWEST UNIVERSITY
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