Calcium sulfate modified polylactic acid material and preparation method thereof

A polylactic acid material and calcium sulfate technology, applied in the field of calcium sulfate modified polylactic acid material and its preparation, can solve the problems of poor water resistance, insufficient impact strength, limited application scope, etc., and achieve good dimensional stability and high impact strength. , good water resistance

Active Publication Date: 2012-06-27
XIANGFU NEW BUILDING MATERIAL HUNAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polylactic acid is a new type of biodegradable material, which can be completely biodegraded under the action of the natural environment after use, and finally decomposed into CO 2 and H 2 O, no pollution to the environment; and polylactic acid materials have good air permeability, oxygen permeability, thermal stability, solvent resistance and biocompatibility, and are widely used in biomedicine, packaging, electronic appliances, automobiles and other important fields. However, the polylactic acid material has poor water resistance and insufficient impact strength, which limits its application range.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The raw material weight ratio of the calcium sulfate-modified polylactic acid material in this embodiment is: polylactic acid (PLA) 15 Kg, calcium sulfate 4 Kg, coupling agent vinyltriethoxysilane 1 Kg.

[0018] Preparation:

[0019] (1) Surface modification of calcium sulfate: dissolve the coupling agent vinyltriethoxysilane in 250ml of absolute ethanol, stir at 45°C for 5 hours, repeat cleaning and suction filtration 5 times until the impurities are removed; 500ml of absolute ethanol to obtain a suspension; then add calcium sulfate, stir for 25 minutes, sonicate for 10 minutes, and stir for another 25 minutes; filter with absolute ethanol, wash 5 times, and then dry in a vacuum oven at 50°C for 24 hours to obtain dryness Modified anhydrous calcium sulfate;

[0020] (2) Put polylactic acid and the modified anhydrous calcium sulfate obtained in step (1) into a high-speed stirrer, and stir for 30 minutes at room temperature to obtain a mixture of modified anhydrous calc...

Embodiment 2

[0024] The raw material weight ratio of the calcium sulfate-modified polylactic acid material in this embodiment is: polylactic acid (PLA) 14Kg, calcium sulfate 3Kg, coupling agent vinyltriethoxysilane 3Kg.

[0025] Preparation:

[0026] (1) Surface modification of calcium sulfate: Dissolve the coupling agent vinyltriethoxysilane in 250ml of absolute ethanol, stir at 45°C for 5 hours, repeat cleaning and suction filtration 5 times until the impurities are removed; then add 450ml of absolute ethanol to obtain a suspension; then add calcium sulfate, stir for 25 minutes, sonicate for 10 minutes, and stir for another 25 minutes; filter with absolute ethanol, wash 5 times, and then dry in a vacuum oven at 50°C for 24 hours to obtain dryness Modified anhydrous calcium sulfate;

[0027] (2) Put the polylactic acid and the modified anhydrous calcium sulfate obtained in step (1) into a high-speed stirrer, and stir for 30 minutes at room temperature to obtain a mixture of modified anhy...

Embodiment 3

[0031] The weight ratio of the raw materials of the calcium sulfate-modified polylactic acid material in this embodiment is: polylactic acid (PLA) 17Kg, calcium sulfate 1Kg, coupling agent vinyltriethoxysilane 2Kg.

[0032] Preparation:

[0033] (1) Surface modification of calcium sulfate: Dissolve the coupling agent vinyltriethoxysilane in 250ml of absolute ethanol, stir at 45°C for 5 hours, repeat cleaning and suction filtration 5 times until the impurities are removed; then add 500ml of absolute ethanol to obtain a suspension; then add calcium sulfate, stir for 25 minutes, sonicate for 10 minutes, and stir for another 25 minutes; filter with absolute ethanol, wash 5 times, and then dry in a vacuum oven at 50°C for 24 hours to obtain dryness Modified anhydrous calcium sulfate;

[0034] (2) Put the polylactic acid and the modified anhydrous calcium sulfate obtained in step (1) into a high-speed stirrer, and stir for 30 minutes at room temperature to obtain a mixture of modif...

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PUM

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Abstract

The invention discloses a calcium sulfate modified polylactic acid material and a preparation method thereof. The calcium sulfate modified polylactic acid material is prepared from the following raw materials in part by weight: 65 to 85 parts of polylactic acid, 5 to 20 parts of calcium sulfate, and 5 to 30 parts of vinyl triethoxysilane serving as a coupling agent. The invention also discloses the preparation method for the calcium sulfate modified polylactic acid material. The calcium sulfate modified polylactic acid material has high impact strength, good water resistance and good dimensional stability, and is particularly suitable for manufacturing biomedical products, packing products, living articles, electronic appliance shells, automobile instrument panels and the like.

Description

technical field [0001] The invention relates to a polylactic acid material and a preparation method thereof, in particular to a calcium sulfate modified polylactic acid material and a preparation method thereof. Background technique [0002] Polylactic acid is a new type of biodegradable material, which can be completely biodegraded under the action of the natural environment after use, and finally decomposed into CO 2 and H 2 O, no pollution to the environment; and polylactic acid materials have good air permeability, oxygen permeability, thermal stability, solvent resistance and biocompatibility, and are widely used in biomedicine, packaging, electronic appliances, automobiles and other important fields. However, the polylactic acid material has poor water resistance and insufficient impact strength, which limits its application range. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the deficiencies of exist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08K13/06C08K9/06C08K7/08C08K3/30B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92904
Inventor 刘珍如刘立文付桃梅杨志强宁勇鲁纪鸣
Owner XIANGFU NEW BUILDING MATERIAL HUNAN
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