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A kind of dehulled flaxseed powder composite modified bacterial synthetic polyester material and its preparation method

A technology of linseed powder and polyester materials, which is applied in the field of shelled linseed powder compound modified bacterial synthetic polyester materials and its preparation, can solve the problems of high brittleness and limit the application range of polyhydroxybutyrate, and achieve brittleness The effects of reduction, strength increase, and elongation at break increase

Inactive Publication Date: 2017-12-05
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyhydroxybutyrate is a kind of degradable polyester synthetic material, which is mainly synthesized by bacteria (such as: Alcaligenes eutropha, brown nitrogen-fixing bacteria, methylotrophic bacteria, etc.) in industry, but the existing polyhydroxybutyrate The brittleness is relatively large, which greatly limits the application range of polyhydroxybutyrate in the field of materials

Method used

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  • A kind of dehulled flaxseed powder composite modified bacterial synthetic polyester material and its preparation method
  • A kind of dehulled flaxseed powder composite modified bacterial synthetic polyester material and its preparation method
  • A kind of dehulled flaxseed powder composite modified bacterial synthetic polyester material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of dehulled linseed powder composite modified bacteria synthetic polyester material, prepared by the following method:

[0019] (1) According to 5 parts of shelled flaxseed powder and 100 parts of poly(3-hydroxybutyrate-co-4-hydroxybutyrate), select shelled flaxseed powder, poly(3-hydroxybutyrate-co- -4-hydroxybutyrate), the shelled flaxseed powder and poly(3-hydroxybutyrate-co-4-hydroxybutyrate) are preliminarily mixed to obtain a blend;

[0020] (2) Put the blend in an internal mixer for banburying: the temperature is 140° C., the rotation speed is 48 rpm (revolutions per minute), and the time is 30 minutes to obtain a solid mixture;

[0021] (3) The solid mixture after banburying is subjected to hot-compression composite molding on a hot press: the temperature is 140°C, the pressure is 10MPa, and the time is 15 minutes; after molding, it is vacuum-dried at 40°C for 72 hours to remove moisture and obtain Hull linseed powder composite modified bacteria syntheti...

Embodiment 2

[0024] A kind of dehulled linseed powder composite modified bacteria synthetic polyester material, prepared by the following method:

[0025] (1) According to 10 parts of shelled flaxseed powder and 100 parts of poly(3-hydroxybutyrate-co-4-hydroxybutyrate), select shelled flaxseed powder, poly(3-hydroxybutyrate-co- -4-hydroxybutyrate), the shelled flaxseed powder and poly(3-hydroxybutyrate-co-4-hydroxybutyrate) are preliminarily mixed to obtain a blend;

[0026] (2) Put the blend in an internal mixer for banburying: the temperature is 160° C., the rotation speed is 60 rpm (revolutions per minute), and the time is 20 minutes to obtain a solid mixture;

[0027] (3) The solid mixture after banburying is subjected to hot-press composite molding on a hot press: the temperature is 145° C., the pressure is 20 MPa, and the time is 12 minutes; after molding, it is vacuum-dried at 50° C. for 60 hours to remove moisture and obtain Hull linseed powder composite modified bacteria syntheti...

Embodiment 3

[0030] A kind of dehulled linseed powder composite modified bacteria synthetic polyester material, prepared by the following method:

[0031] (1) According to 15 parts of shelled flaxseed powder and 100 parts of poly(3-hydroxybutyrate-co-4-hydroxybutyrate), select shelled flaxseed powder, poly(3-hydroxybutyrate-co- -4-hydroxybutyrate), the shelled flaxseed powder and poly(3-hydroxybutyrate-co-4-hydroxybutyrate) are preliminarily mixed to obtain a blend;

[0032] (2) Put the blend in an internal mixer for banburying: the temperature is 170° C., the rotation speed is 80 rpm (revolutions per minute), and the time is 15 minutes to obtain a solid mixture;

[0033] (3) The solid mixture after banburying is subjected to hot-compression composite molding on a hot press: the temperature is 150°C, the pressure is 30MPa, and the time is 8 minutes; after molding, it is vacuum-dried at 60°C for 12 hours to remove moisture, and to obtain Hull linseed powder composite modified bacteria synt...

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Abstract

The invention belongs to the field of natural high-molecular materials, and concretely relates to a peeled flax seed powder compound modified biomass based polyester material and a preparation method thereof. The peeled flax seed powder composite modified biomass based polyester material is compositely prepared from 5-30 parts of peeled flax seed powder and 100 parts of biomass based polyester. The peeled flax seed powder is used for compound modification of the biomass based polyester, and has the advantages of low cost, environmental friendliness, good compatibility, etc.; banbury mixing is combined with hot pressing composite moulding technology, and the method has the characteristics of simple and fast process, high efficiency and environmental protection; after the peeled flax seed powder is compounded and modified, fracture elongation of the biomass based polyester material is largely improved, the brittleness of the material is substantially decreased, the toughness is substantially increased, and thereby application scope of the material is effectively extended; the peeled flax seed powder composite modified biomass based polyester material can be directly molded and processed into film, sheet material, section bar or container, etc., and can also be used as package material or engineering plastic, etc.

Description

technical field [0001] The invention belongs to the field of natural polymer materials, and in particular relates to a composite modified bacterial synthetic polyester material of shelled linseed powder and a preparation method thereof. Background technique [0002] Hulled flaxseed powder is the product of flax seeds peeled, milled and sieved. It has the advantages of cheap (flax is easy to grow and can get better returns), renewable, and environmentally friendly. Flax belongs to the cruciferous family and is a sustainable alternative energy crop with great potential, which can be efficiently processed into high-quality renewable fuels (such as biodiesel, etc.). In addition to containing oil, flax also contains a variety of proteins and carbohydrates, which can be used to develop value-added biological products. With the increasing shortage of petroleum resources, rising raw material prices and environmental degradation, the research and application of natural polymer mater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L89/00C08L91/00B29C43/58
Inventor 黄进陈兆曙高山俊张荣贵胡飞廖景露
Owner WUHAN UNIV OF TECH