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Heat-resistant antimicrobial polylactic acid material and preparation method thereof

A polylactic acid material and polylactic acid technology are applied in the field of heat-resistant and antibacterial polylactic acid materials and their preparation, and can solve problems such as no public reports.

Active Publication Date: 2015-06-17
JIAXING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no public report on the use of nano-silver / graphene oxide nanocomposites to modify polylactic acid

Method used

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  • Heat-resistant antimicrobial polylactic acid material and preparation method thereof

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Effect test

Embodiment 1

[0022] 1) Add 20mM silver nitrate aqueous solution dropwise to 5ml 0.5mg / ml graphene oxide aqueous solution with a diameter of 100nm and a thickness of 1nm in 5 drops, 1ml each time. Then stir vigorously at room temperature for 48 hours, then centrifuge at 10,000 rpm for 20 minutes, wash the centrifuged precipitate with deionized water, and dry it in a vacuum oven at 50 degrees for 12 hours. Graphene nanocomposites.

[0023] 2) Disperse the nano-silver / graphene oxide nanocomposite material obtained in step 1) in lactic acid, prepare a solution with a concentration of 0.1g / L, and then use an ultrasonic device with a power of 300W to ultrasonically treat the solution for 0.5 hours, Obtain nano-silver / graphene oxide nanocomposite lactic acid solution;

[0024] 3) Put the ultrasonically treated mixed solution in step 2) into a vacuum oven at a temperature of 50 degrees Celsius, and vacuum bake for 10 hours until the mixed solution has no residual water;

[0025] 4) To obtain the...

Embodiment 2

[0028] 1) Add 10mM silver nitrate aqueous solution dropwise to 5ml 0.5mg / ml graphene oxide aqueous solution with a diameter of 5μm and a thickness of 10nm in 5 drops, 1ml each time. Then stir vigorously at room temperature for 36 hours, then centrifuge at 10,000 rpm for 5 minutes, wash the centrifuged precipitate with deionized water, and dry it in a vacuum oven at 80 degrees for 5 hours. Graphene nanocomposites.

[0029] 2) disperse the nano-silver / graphene oxide nanocomposite material obtained in step 1) in lactic acid, prepare a solution with a concentration of 20g / L, and then use an ultrasonic device with a power of 1000W to ultrasonicate the solution for 5 hours to obtain Nano silver / graphene oxide nanocomposite lactic acid solution;

[0030] 3) Put the ultrasonically treated mixed solution in step 2) into a vacuum oven at a temperature of 80 degrees Celsius, and vacuum bake for 10 hours until the mixed solution has no residual water;

[0031] 4) To obtain the polylacti...

Embodiment 3

[0034] 1) Add 30mM silver nitrate aqueous solution dropwise to 5ml 0.5mg / ml graphene oxide aqueous solution with a diameter of 1 μm and a thickness of 20nm in 5 drops, 1ml each time. Then stir vigorously at room temperature for 24 hours, then centrifuge at 10,000 rpm for 5 minutes, wash the centrifuged precipitate with deionized water, and dry it in a vacuum oven at 80 degrees for 5 hours. Graphene nanocomposites.

[0035] 2) Disperse the nano-silver / graphene oxide nanocomposite material obtained in step 1) in lactic acid, prepare a solution with a concentration of 1g / L, and then use an ultrasonic device with a power of 500W to ultrasonically treat the solution for 1 hour to obtain Nano silver / graphene oxide nanocomposite lactic acid solution;

[0036] 3) Put the ultrasonically treated mixed solution in step 2) into a vacuum oven at a temperature of 50 degrees Celsius, and vacuum bake for 48 hours until the mixed solution has no residual water;

[0037] 4) To obtain the poly...

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Abstract

The invention relates to a heat-resistant antimicrobial polylactic acid material and a preparation method thereof. The material comprises a polylactic acid base material and a nano silver / graphene oxide nano composite material which is uniformly dispersed in the polylactic acid base material, wherein the mass percent of the nano silver / graphene oxide nano composite material relative to the polylactic acid base material is 0.1-10%. The nano silver / graphene oxide nano composite material is obtained by forming nano silver particles on the graphene oxide surface by performing in-situ reduction on silver nitrate in a graphene oxide solution, and the mass ratio of the nano silver to the graphene oxide is (1-120):100. The diameter of the graphene oxide is 100nm-50 mu m, and the thickness is 1-20nm. The heat-resistant antimicrobial polylactic acid material has higher heat-resistance and mold resistance than the common polylactic acid material. The heat-resistant antimicrobial polylactic acid material is suitable for manufacturing antimicrobial clothes.

Description

technical field [0001] The invention belongs to the field of preparation of polymer-based composite materials, and in particular relates to a heat-resistant and antibacterial polylactic acid material and a preparation method thereof. Background technique [0002] Polylactic acid fibers have been widely used in clothing, interior products, medical and health fields because their raw materials can be fermented by microorganisms, and have biodegradability and many unique properties. There are still many problems in aspects such as polylactic acid fibers, which limit the application of polylactic acid fibers in high-performance products. At the same time, polylactic acid underwear fabrics, as personal clothing, are easily polluted by human sweat to produce bacteria, which poses a threat to human health, so the development of antibacterial and heat-resistant polylactic acid materials has important practical significance. [0003] The main technologies to improve the heat resista...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08K3/08C08K3/04
Inventor 沈小军党蕊琼李冬美曾晓玲
Owner JIAXING UNIV
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