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Acetylated cellulose nanocrystalline composite modified biomass-based polyester material and preparation method thereof

A biomass-based polyester and nanocrystalline composite technology, applied in the field of natural polymer materials, can solve the problems of high brittleness and limit the application range of polyhydroxybutyrate, and achieve reduced toughness, increased rigidity, and improved Young's modulus Effect

Inactive Publication Date: 2016-07-13
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyhydroxybutyrate is a biodegradable polyester synthetic material, which is mainly synthesized industrially by bacteria (such as: Alcaligenes eutropha, Azotobacter brownia, methylotrophic bacteria, etc.), but the existing polyhydroxybutyrate The brittleness of esters is relatively large, which greatly limits the application range of polyhydroxybutyrate in the field of materials

Method used

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  • Acetylated cellulose nanocrystalline composite modified biomass-based polyester material and preparation method thereof
  • Acetylated cellulose nanocrystalline composite modified biomass-based polyester material and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0023] A kind of acetylated cellulose nanocrystalline composite modified biomass-based polyester material, prepared by the following method:

[0024] (1) According to 3 parts of acetylated cellulose nanocrystals (the degree of acetylation substitution is 62.9% and 63.2%, respectively), 100 parts of poly(3-hydroxybutyrate-co-4-hydroxybutyrate), select acetylated Cellulose nanocrystals, poly(3-hydroxybutyrate-co-4-hydroxybutyrate), acetylated cellulose nanocrystals are dispersed in chloroform, after ultrasonic treatment (ultrasonic times 3 times, ultrasonic time 10min / time) to obtain acetylated cellulose nanocrystal suspension;

[0025] (2) Add poly(3-hydroxybutyrate-co-4-hydroxybutyrate) to the suspension of acetylated cellulose nanocrystals, and continue magnetic stirring until poly(3-hydroxybutyrate-co- 4-hydroxybutyrate) obtains the homogeneous blend after dissolving completely;

[0026] (3) Pour the homogeneously mixed blend into a polytetrafluoroethylene mold, keep it at...

Embodiment 2

[0029] A kind of acetylated cellulose nanocrystalline composite modified biomass-based polyester material, prepared by the following method:

[0030] (1) According to 6 parts of acetylated cellulose nanocrystals (the degree of acetylation substitution is 62.9% and 63.2%, respectively), 100 parts of poly(3-hydroxybutyrate-co-4-hydroxybutyrate), select acetylated Cellulose nanocrystals, poly(3-hydroxybutyrate-co-4-hydroxybutyrate), acetylated cellulose nanocrystals are dispersed in chloroform, after ultrasonic treatment (ultrasonic times 3 times, ultrasonic time 10min / time) to obtain acetylated cellulose nanocrystal suspension;

[0031] (2) Add poly(3-hydroxybutyrate-co-4-hydroxybutyrate) to the suspension of acetylated cellulose nanocrystals, and continue magnetic stirring until poly(3-hydroxybutyrate-co- 4-hydroxybutyrate) obtains the homogeneous blend after dissolving completely;

[0032] (3) Pour the homogeneously mixed blend into a polytetrafluoroethylene mold, keep it at...

Embodiment 3

[0035] A kind of acetylated cellulose nanocrystalline composite modified biomass-based polyester material, prepared by the following method:

[0036] (1) According to 9 parts of acetylated cellulose nanocrystals (the degree of acetylation substitution is 62.9% and 63.2%, respectively), 100 parts of poly(3-hydroxybutyrate-co-4-hydroxybutyrate), select acetylated Cellulose nanocrystals, poly(3-hydroxybutyrate-co-4-hydroxybutyrate), acetylated cellulose nanocrystals are dispersed in chloroform, after ultrasonic treatment (ultrasonic times 3 times, ultrasonic time 10min / time) to obtain acetylated cellulose nanocrystal suspension;

[0037] (2) Add poly(3-hydroxybutyrate-co-4-hydroxybutyrate) to the suspension of acetylated cellulose nanocrystals, and continue magnetic stirring until poly(3-hydroxybutyrate-co- 4-hydroxybutyrate) obtains the homogeneous blend after dissolving completely;

[0038] (3) Pour the homogeneously mixed blend into a polytetrafluoroethylene mold, keep it at...

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Abstract

The invention belongs to the field of natural high polymer materials and particularly relates to an acetylated cellulose nanocrystalline composite modified biomass-based polyester material and a preparation method thereof. The acetylated cellulose nanocrystalline composite modified biomass-based polyester material is prepared from acetylated cellulose nanocrystalline and poly(3-hydroxybutyrate-co-4-hydroxybutyrate) in the weight ratio being (3-30):100 through compositing. The preparation method comprises steps as follows: poly(3-hydroxybutyrate-co-4-hydroxybutyrate) and an acetylated cellulose nanocrystalline solution are mixed and put into a polytetrafluoroethylene mold for film casting, a solvent is evaporated at the room temperature, and the acetylated cellulose nanocrystalline composite modified biomass-based polyester material is obtained after vacuum drying. The tensile strength and the Young modulus of poly(3-hydroxybutyrate-co-4-hydroxybutyrate) are remarkably improved after composite modification by acetylated cellulose nanocrystalline, the strength and the rigidity of the material are improved, and the application range of the material is effectively broadened.

Description

technical field [0001] The invention belongs to the field of natural polymer materials, and in particular relates to an acetylated cellulose nanocrystal composite modified biomass-based polyester material and a preparation method thereof. Background technique [0002] Cellulose is a natural polysaccharide macromolecule that widely exists in nature, and is a structural polymer commonly found in various plants. From the structure of cellulose, it is mainly composed of crystalline and amorphous regions. The amorphous region is sensitive to hydrolysis conditions and can be completely removed under certain conditions, leaving relatively complete rigid crystalline regions to become cellulose nanocrystals. Compared with inorganic nanoparticles, cellulose nanocrystals have many advantages, such as easy availability, low cost, nano-effect, high specific surface area and modulus, relatively easy handling, biodegradation, biocompatibility, and active surface groups. In particular, ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L1/12C08B3/06
CPCC08B3/06C08L67/04C08L2201/06C08L2205/14C08L1/12
Inventor 高山俊廖景露黄进
Owner WUHAN UNIV OF TECH
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