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A kind of degradable hollow fiber membrane and preparation method thereof

A fiber membrane and hollow technology, which is applied in the field of degradable hollow fiber membrane and its preparation, can solve the problems such as the difficulty of degrading the hollow fiber membrane, and achieve the effect of good water purification effect

Active Publication Date: 2016-08-31
广州绿膜新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, it is necessary to provide a degradable hollow fiber membrane and its processing method for the problem that the hollow fiber membrane is difficult to degrade

Method used

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  • A kind of degradable hollow fiber membrane and preparation method thereof
  • A kind of degradable hollow fiber membrane and preparation method thereof
  • A kind of degradable hollow fiber membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Heat 24% polylactic acid, 4% PEG-PLA-PEG, 2% PEG20000 and 70% DMSO at 140°C to form a homogeneous solution by weight percentage, and stir for 2 hours to form a casting solution; slow down the stirring speed and Degas at 95℃ for 1 hour; under certain pressure, the casting liquid passes through the spinneret. The spinneret consists of an outer tube and an inner tube. The casting liquid and inner liquid are sent into the spinneret separately at 95℃ The outside and inside of the tube are extruded from the spinneret and introduced into a 4°C low-temperature ice water bath to induce phase separation and solidify into hollow fibers; the prepared hollow fibers are immersed in circulating water to remove the solvent and internal liquid.

Embodiment 2

[0027] Heat 21% polylactic acid, 4% PEG-PLA-PEG, 2% PEG20000 and 73% DMSO at 130°C to form a homogeneous solution by weight, and stir for 2 hours to form a casting solution; slow down the stirring speed and set it at 100 Degassing at ℃ for 1 hour; under a certain pressure, the casting liquid passes through the spinneret. The spinneret consists of an outer tube and an inner tube. The hollow fiber membrane casting liquid and the inner liquid are sent to the spinneret respectively at 100°C The outer and inner sides of the fiber are extruded from the spinneret and introduced into a 5°C low-temperature ice water bath to induce phase separation and solidify into hollow fibers. The prepared hollow fiber is immersed in circulating water to remove the solvent and internal liquid.

Embodiment 3

[0029] Heat 18% polylactic acid, 4% PEG-PLA-PEG, 2% PEG20000 and 76% DMSO at 150°C to form a homogeneous solution by weight, and stir for 2 hours to form a casting solution; slow down the stirring speed and set it at 90 Degassing at ℃ for 1 hour; under certain pressure, the casting liquid passes through the spinneret. The spinneret consists of an outer tube and an inner tube. The casting liquid and inner liquid are sent to the outside of the spinneret at 90°C. And the inner side, extruded from the spinneret, and introduced into a 3°C low-temperature ice water bath to induce phase separation and solidify into hollow fibers; the prepared hollow fibers are immersed in circulating water to remove the solvent and internal liquid.

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Abstract

The invention relates to a degradable hollow fiber membrane and a preparation method thereof. Membrane casting liquid of the degradable hollow fiber membrane comprises the following components by weight percent: 18%-24% of polylactic acid, 4% of PEG-PLA-PEG, 2% of PEG 20000 and 70%-76% of dimethyl sulfoxide. The preparation method comprises the following steps: (1) after preparing the membrane casting liquid according to a certain proportion, heating the membrane casting liquid at 130-150 DEG C to form a homogeneous solution, stirring and defoaming; (2) extruding the membrane casting liquid and interior liquid from a spinning nozzle at 90-100 DEG C, introducing the membrane casting liquid and the interior liquid into a low temperature ice-water bath being 3-5 DEG C, carrying out phase separation and solidification to form hollow fiber; and (3) soaking the prepared hollow fiber into circulating water, and removing solvents and the interior liquid in the hollow fiber. According to the preparation method, polylactic acid serves as a raw matrix material, an NIPS method and a TIPS method are combined for use, and the hollow fiber membrane with good dialysis performance is obtained; the degradable hollow fiber membrane has the beneficial effects that the outer surface is smooth and compact, the fracture surface of a membrane silk is of a finger structure, and the water purification effect is good.

Description

Technical field [0001] The invention relates to a hollow fiber membrane and a preparation method thereof, in particular to a degradable hollow fiber membrane and a preparation method thereof. Background technique [0002] Fiber, as a polymer material closely related to people's lives, its application and development are very rapid. Currently, most of the hollow fiber membranes in the market are used as an important part of the filter element in the water purification device, and its filtration accuracy is in the range of 0.005-0.01μm, which can effectively remove particles, colloids, bacteria, heat sources and polymer organic substances in the water. [0003] As people’s understanding of environmental pollution threatening human survival has become more and more profound, the disposal of polymer fiber material waste has attracted more and more attention. Synthetic fiber waste produced by industry and life has become today’s environmental pollution. An important source of In view ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/48B01D69/08B01D67/00
Inventor 沈鹏李铭钢李涓胜曾汉贤
Owner 广州绿膜新材料科技有限公司
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