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Polylactic acid / porous geopolymer composite material preparation method

A technology of composite materials and geopolymers, applied in the field of preparation of polylactic acid/porous geopolymer composite materials, can solve problems such as unsatisfactory strength

Inactive Publication Date: 2016-03-09
梅庆波
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problem to be solved by the present invention: Aiming at the current modification of polylactic acid, which is compounded by carbon fiber or natural flax fiber, while meeting the toughness of the composite material, it cannot meet the demand for strength. Foaming treatment to prepare porous geopolymers, and then grind the porous geopolymers to prepare powder geopolymers, and couple them with coupling groups that are similar to polylactic acid groups, so that they can be effectively combined with polylactic acid Organically combined to improve its mechanical properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021]First select kaolin and place it in a muffle furnace, then slowly raise the temperature to 750°C at a rate of 10°C / min, then heat-preserve and calcinate for 2 hours to stop heating, and cool it to 20°C, then take it out to prepare calcined kaolin Standby; stir the water glass solution with a mass concentration of 40% and the calcined kaolin prepared above for 25 minutes to mix them evenly to prepare a geopolymer slurry, and then quickly drop the mixed foaming agent to In the geopolymer slurry, the dropping rate is 5mL / min. After 30 minutes of dripping, stop the dripping and continue to stir and mix for 10 minutes, and place it in a 60°C thermostat for 10 hours to prepare a porous geopolymer for later use. ; Select absolute ethanol, adjust its pH to 3.1 with a mass concentration of 10% acetic acid solution, then slowly add 3-aminopropyltriethoxysilane dropwise at a speed of 300r / min by mass ratio of 1:10 into the above solution, mixed and stirred for 2 hours to prepare a ...

example 2

[0024] First select kaolin and place it in a muffle furnace, then slowly raise the temperature to 700°C at a rate of 12°C / min, then heat-preserve and calcinate for 2.5 hours to stop heating, and cool it to 25°C, then take it out to prepare the calcined The kaolin is ready for use; stir the water glass solution with a mass concentration of 40% and the calcined kaolin prepared above for 27 minutes to mix them evenly to prepare a geopolymer slurry, and then quickly add the mixed foaming agent dropwise at a mass ratio of 1:5 Into the geopolymer slurry, the dropping rate is 5mL / min. After 28 minutes of dripping, stop the dripping and continue to stir and mix for 12 minutes, and place it in a 65°C thermostat for 11 hours to prepare a porous geopolymer Standby; select absolute ethanol, adjust its pH to 3.2 with acetic acid solution with a mass concentration of 10%, and then slowly drop 3-aminopropyltriethoxysilane at a speed of 350r / min according to a mass ratio of 1:10 Add it to the...

example 3

[0027] First select kaolin and place it in a muffle furnace, then slowly raise the temperature to 880°C at a rate of 15°C / min, then heat-preserve and calcinate for 3 hours to stop heating, and cool it to 30°C, then take it out to prepare calcined kaolin Standby; stir the water glass solution with a mass concentration of 40% and the calcined kaolin prepared above for 30 minutes to mix them evenly to prepare a geopolymer slurry, and then quickly drop the mixed foaming agent to In the geopolymer slurry, the dropping rate is 5mL / min. After 45 minutes of dripping, stop the dripping and continue to stir and mix for 15 minutes, and place it in a 70°C thermostat for 12 hours to prepare a porous geopolymer for later use. ; Select absolute ethanol, adjust its pH to 3.3 with a mass concentration of 10% acetic acid solution, then slowly add 3-aminopropyltriethoxysilane dropwise at a speed of 400r / min by mass ratio of 1:10 into the above solution, mixed and stirred for 3 hours to prepare a...

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PUM

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Abstract

The present invention relates to a polylactic acid / porous geopolymer composite material preparation method, belonging to the field of preparation of composite materials. The preparation method aims at the problem that in the prior art when polylactic acid is modified, by compounding of carbon fiber or natural flax fiber, composite material toughness can be met, but the demand for strength cannot be met simultaneously, according to the preparation method, kaolin is calcined, then foamed for preparation of a porous geopolymer, then the porous geopolymer is milled for preparing a powder geopolymer, and a coupling group similar to a polylactic acid group is grafted and coupled with the powder geopolymer, so that the powder geopolymer can be effectively organically combined with polylactic acid, by modification of geopolymer particles, impact strength can reach up to 135-140J / m<2>, the geopolymer composite material is prepared by preparing the geopolymer from the kaolin and then modifying, and the geopolymer composite material is green environmentally-friendly and non-pollution.

Description

technical field [0001] The invention relates to a preparation method of a polylactic acid / porous geopolymer composite material, belonging to the field of composite material preparation. Background technique [0002] Polylactic acid is a synthetic polymer material with excellent biocompatibility and biodegradability. This linear thermoplastic biodegradable aliphatic polyester uses starch extracted from some plants such as corn, wheat, and cassava as the initial raw material, which is decomposed by enzymes to obtain glucose, which is then fermented by lactic acid bacteria into lactic acid, and then chemically synthesized. High-purity polylactic acid. After PLA products are discarded in soil or water, they will be completely decomposed into CO under the action of microorganisms, water, acid and alkali within 30 days. 2 and H 2 O, and then under the photosynthesis of the sun, it becomes the starting material of starch again, which will not pollute the environment, so it is a ...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L71/02C08K13/06C08K9/06C08K9/00C08K5/098C08K5/09C08K3/34
CPCC08L67/04
Inventor 梅庆波高力群
Owner 梅庆波