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Method for preparing polylactic acid nano composite material

A technology of nanocomposite materials and polylactic acid, which is applied in the field of preparation of polylactic acid nanocomposite materials, can solve the problems that the mechanical properties of polylactic acid are not very strong, and achieve the effect of facilitating industrial production and simple production

Active Publication Date: 2016-01-27
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no one has developed polylactic acid nanocomposites and preparation methods based on spodumene slag.
However, the mechanical properties of polylactic acid are not very strong, but now many devices require materials with high mechanical properties

Method used

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  • Method for preparing polylactic acid nano composite material
  • Method for preparing polylactic acid nano composite material
  • Method for preparing polylactic acid nano composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1. Clean and dry the spodumene slag, then mix the spodumene slag and NaOH into pure water in equal quantities, use the hydrothermal method, stir and react for several hours at the temperature of the mixing system at 100°C, and filter to obtain the extract , by adding acid, adjust the pH to 7 and a precipitate appears, wash the precipitate with ethanol and chloroform and filter to obtain a filter cake, then take the filter cake and polylactic acid and add them to chloroform with a mass ratio of 1:4 and stir homogeneous and dried to prepare the polylactic acid nanocomposite material of spodumene slag.

[0016] 2. Inject the polylactic acid nanocomposite material of spodumene slag into such as figure 1 A standard dumbbell shape (32mm x 4mm x 2mm) is shown and used for tensile properties testing.

[0017] The injection process is: barrel temperature 190°C, mold temperature 40°C, injection pressure 600bar, holding pressure 400bar.

Embodiment 2 to 8

[0019] 1. Using the same steps as in Example 1, by changing the feed ratio of spodumene slag and NaOH, changing the value of adjusting pH, changing the temperature of hydrothermal reaction, changing the feed mass ratio of filter cake and polylactic acid, the following are obtained respectively Example.

[0020]

[0021] 2. Inject the nano-composite materials made in the above examples into the same figure 1 Standard dumbbell shape (32mm x 4mm x 2mm) shown.

[0022] The injection process is: barrel temperature 190°C, mold temperature 40°C, injection pressure 600bar, holding pressure 400bar.

[0023] figure 1 The product is transparent.

[0024] It can be seen that the process of the present invention adopts any ratio of filter cake and polylactic acid to obtain nanocomposite materials.

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Abstract

The invention relates to a method for preparing a polylactic acid nano composite material, and relates to the technical field of material preparation. The method comprises the following steps: mixing spodumene slag and NaOH in water to react to prepare a reaction generated liquid, adjusting the pH value of the reaction generated liquid to 6-8 with acid, taking precipitate, washing the precipitate with ethanol and trichloromethane, filtering to obtain a filter cake, adding the filter cake and polylactic acid into trichloromethane, uniformly stirring, and drying, thereby obtaining the polylactic acid nano composite material of spodumene slag. The polylactic acid nano composite material is convenient in industrial production, energy-saving and environmentally friendly, and simple to prepare.

Description

technical field [0001] The invention relates to the technical field of material preparation, in particular to a method for preparing a polylactic acid nanocomposite material based on spodumene slag. Background technique [0002] Spodumene slag is the industrial solid waste generated after the photovoltaic industry utilizes spodumene ore to extract lithium carbonate. Spodumene slag not only occupies land, but also is easy to be lost with wind and rain, polluting the environment, endangering farmland, and bringing a heavy burden to society and the environment. As the situation of environmental protection becomes increasingly severe, in order to create a harmonious and sustainable society, the secondary utilization of industrial waste is becoming more and more important. Therefore how to deal with spodumene slag has become an urgent problem to be solved. [0003] At present, the main treatment methods for spodumene slag are: (1) composite with cement to form concrete; (2) com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K3/22C08K3/36
Inventor 吴德峰仇亚昕
Owner YANGZHOU UNIV