A kind of pla-tps nanofibrous film and its preparation method and application

A nanofiber membrane, pla-tps technology, applied in the preparation of PLA-TPs nanofiber membrane, in the field of PLA-TPs nanofiber membrane, to achieve enhanced adsorption capacity, simple operation, and high specific surface area

Active Publication Date: 2020-12-22
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, general nanofibrous membranes can only absorb relatively low concentrations of heavy metal solutions.

Method used

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  • A kind of pla-tps nanofibrous film and its preparation method and application
  • A kind of pla-tps nanofibrous film and its preparation method and application
  • A kind of pla-tps nanofibrous film and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method of PLA-TPs nanofiber membrane, comprising the steps of:

[0021] (1) Add a DCM / DMF mixed solution with a mass ratio of 8:2 to the brown ground bottle, then weigh a certain mass of polylactic acid, add it to the mixed solution, and then put the brown ground bottle on a magnetic stirrer Stir at a constant speed for 2-4 hours until the solute is completely dissolved, the solution is clear and transparent, and a polylactic acid solution with a concentration of 6wt%-8wt% is obtained;

[0022] (2) Weigh a certain amount of tea polyphenols according to the mass ratio of tea polyphenols to polylactic acid of 0.04:1, add them to the above polylactic acid solution, and then place the prepared mixed solution on a magnetic stirrer and stir at a constant speed for 24 hours , to obtain a uniform spinning solution;

[0023] (3) Start the spinning machine, control the temperature of the experimental environment at 20°C-30°C, and the relative humidity at 45%-65%, a...

Embodiment 2

[0027] A method for preparing a PLA-TPs nanofiber membrane, which differs from Example 1 only in that the mass ratio of the solvent is DCM:DMF=7:3.

Embodiment 3

[0029] A method for preparing a PLA-TPs nanofiber membrane, the difference from Example 1 is that the mass ratio of tea polyphenols to polylactic acid is 0.125:1.

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Abstract

The invention discloses a preparation method of a PLA-TPs nanofiber membrane. The preparation method is characterized in that the preparation method comprises the following steps: (1) polylactic acidis dissolved in a mixed solution of DCM and DMF to obtain a polylactic acid solution with concentration of 6wt% to 8wt%, wherein a mass ratio of the mixed solution of the DCM to the DMF ranges from (7: 3) to (8 : 2); (2) tea polyphenol is dissolved in the polylactic acid solution and stirred evenly, so that a PLA-TPs mixed spinning solution is obtained, wherein amass ratio of the tea polyphenol to the polylactic acid is (0.04 to 0.5) : 1; (3) a spinning machine is started and a mixed spinning solution is subjected to electrostatic spinning under the conditions of a temperature of 20 DEG C to30 DEG C and a relative humidity of 45% to 65% to obtain the PLA-TPs nanofiber membrane. The invention also discloses the PLA-TPs nanofiber membrane and application thereof in adsorbing heavy metal ions. The method disclosed by the invention can prepare the PLA-TPs nanofiber membrane with good homogeneity, high specific surface area and strong adsorption capacity. The nanofiber membrane has strongadsorption capacity for silver ions in wastewater and can be used for purification of the wastewater.

Description

technical field [0001] The invention relates to the field of nanomaterials, in particular to a method for preparing a PLA-TPs nanofiber membrane, the PLA-TPs nanofiber membrane prepared by the method and an application thereof. Background technique [0002] One of the main problems of this century is the environmental pollution caused by industrial activities, for the purpose of industrialization, chemical industry, textile, mining, agriculture, cosmetics, paper and leather, etc. introduce a large number of chemical substances into the environment. Water pollutants in the form of dyes or metal ions pose a serious threat to human health. Drinking water with heavy metals can damage the nervous system, may cause skin irritation, kidney insufficiency, and can increase the risk of cancer. Considering the high toxicity of these materials, the removal of heavy metals has attracted the attention of a large number of researchers. Traditional methods for removing heavy metals from w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/28B01J20/26B01J20/30C02F1/28D04H1/728D01D5/00C02F101/20
CPCB01J20/262B01J20/28033B01J20/28057C02F1/28C02F2101/20D01D5/0007D01D5/003D04H1/728
Inventor 王亚茹徐岚何吉欢
Owner SUZHOU UNIV
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