Alpha-calcium sulfate hemihydrate/aliphatic polyester composite material and preparation method thereof

A technology of calcium sulfate hemihydrate and composite materials, applied in the field of α-calcium sulfate hemihydrate/aliphatic polyester composite materials and its preparation, can solve problems such as product quality reduction, production equipment damage, inorganic salt inclusions, etc., and achieve inhibition Effects of nucleation and growth, reduction of impurities, and mild production conditions

Inactive Publication Date: 2018-08-07
HUBEI UNIV FOR NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In summary, the technical problems in the prior art are: 1) high temperature, high concentration inorganic salt solution is very easy to dehydrate α-calcium sulfate hemihydrate into fibrous anhydrous calcium sulfate; 2) inorganic salts are easily mixed in α-Calcium sulfate hemihydrate, resulting in reduced product quality; 3) High concentration inorganic salt solution seriously damages production equipment; 4) High temperature leads to higher energy consumption

Method used

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  • Alpha-calcium sulfate hemihydrate/aliphatic polyester composite material and preparation method thereof
  • Alpha-calcium sulfate hemihydrate/aliphatic polyester composite material and preparation method thereof
  • Alpha-calcium sulfate hemihydrate/aliphatic polyester composite material and preparation method thereof

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preparation example Construction

[0024] Such as figure 1 Shown, the preparation method of the α-calcium sulfate hemihydrate / aliphatic polyester composite material that the embodiment of the present invention provides comprises the following steps:

[0025] S101: Add 70g to 200g of α-calcium sulfate hemihydrate to the aqueous alcohol solution with a mass percentage concentration of 10% to 65%, so that the mass percentage of α-calcium sulfate hemihydrate is 10 to 30%, and turn on the stirring device to make it Stir evenly, then add an organic surface modifier, adjust the pH value to 10.0, heat, and react at a constant temperature of 65°C for 2.0 hours, suction filter the surface-modified α-calcium sulfate hemihydrate slurry, and wash it with absolute ethanol for 1 to 2 times , drying in an oven for 3 to 4 hours to obtain surface-modified α-calcium sulfate hemihydrate;

[0026] S102: Compression molding of α-calcium sulfate hemihydrate / aliphatic polyester composite material: heat the aliphatic polyester to mel...

Embodiment 1

[0031] (1) Surface modification of α-calcium sulfate hemihydrate

[0032] Add 70g of α-calcium sulfate hemihydrate to 500g of 10wt% ethanol aqueous solution, stir, then add 2.5g of hyaluronic acid, adjust the pH value to 10.0, heat, and react at a constant temperature of 65°C for 2.0 hours, and the surface-modified α-calcium sulfate hemihydrate Suction filter the slurry, wash 2 times with absolute ethanol, and dry in a drying oven to obtain surface-modified α-calcium sulfate hemihydrate. The scanning electron microscope picture is as follows: figure 1 shown.

[0033] (2) Preparation of α-calcium sulfate hemihydrate / polycaprolactone composite material

[0034] Heat 400g of polycaprolactone at 60-65°C to make it melt completely, then add 600g of surface-modified α-calcium sulfate hemihydrate, stir for 2 hours, quickly inject into the mold, hot press at 5MPa for 10 minutes, and then cool at room temperature After 1 hour, the mold was demoulded to obtain the α-calcium sulfate h...

Embodiment 2

[0036] (1) Surface modification of α-calcium sulfate hemihydrate

[0037]Add 100g of α-calcium sulfate hemihydrate to 500g of 30wt% ethanol aqueous solution, stir, then add 3.0g of hyaluronic acid, adjust the pH value to 10.0, heat, and react at a constant temperature of 65°C for 2.0 hours, and the surface-modified α-calcium sulfate hemihydrate The slurry was suction filtered, washed twice with absolute ethanol, and dried in a drying oven to obtain surface-modified α-calcium sulfate hemihydrate.

[0038] (2) Preparation of α-calcium sulfate hemihydrate / polycaprolactone composite material

[0039] Heat 500g of polycaprolactone at 60-65°C to make it melt completely, then add 500g of surface-modified α-calcium sulfate hemihydrate, stir for 2 hours, quickly inject into the mold, hot press at 5MPa for 10 minutes, and then cool at room temperature After 1 hour, the mold was demoulded to obtain the α-calcium sulfate hemihydrate / aliphatic polyester composite material.

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Abstract

The invention belongs to the technical field of composite materials, and discloses an alpha-calcium sulfate hemihydrate / aliphatic polyester composite material and a preparation method thereof, whereinthe alpha-calcium sulfate hemihydrate / aliphatic polyester composite material is prepared from polycaprolactone and alpha-calcium sulfate hemihydrate. Alpha-calcium sulfate hemihydrate crystal is effectively modified, surface active sites are removed, the alpha-calcium sulfate hemihydrate is prevented from rapidly transforming into calcium sulphate dihydrate or anhydrous calcium sulfate. The calcium sulfate has good biocompatibility, can be degraded and absorbed in vivo, is relatively fast in degradation velocity and alleviates the defect that aliphatic polyester is slow in degradation velocity. The composition ratio of the alpha-calcium sulfate hemihydrate and the aliphatic polyester is controlled through adjusting and controlling process conditions, and the strength and in-vivo degradation velocity of the composite material are effectively controlled.

Description

technical field [0001] The invention belongs to the technical field of composite materials, in particular to an α-calcium sulfate hemihydrate / aliphatic polyester composite material and a preparation method thereof. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: Aliphatic polyesters such as polycaprolactone, polylactic acid, and polyhydroxyalkanoate have many advantages such as good physical properties, machinability, biocompatibility, and biodegradability, and have become the subject of many researches in recent decades. It is a focus of attention of readers and is developing rapidly in the field of biomedical materials. However, due to the disadvantages of poor hydrophilicity, slow degradation rate, and low mechanical strength, aliphatic polyester cannot meet its requirements in practical applications. In order to overcome and improve some of the existing deficiencies of aliphatic polyester, optimize and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K9/04C08K7/08
Inventor 冯驸胡颖胡卫兵周大寨胡盛余爱农
Owner HUBEI UNIV FOR NATITIES
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