Fiber tube reinforced hollow fiber composite biofilm as well as preparation method and application thereof

A fiber composite and reinforced technology, which is applied in the field of fiber tube reinforced hollow fiber composite biomembrane and its preparation, can solve the problems of inability to form a stable ecosystem and the absence of bioaggregation, and achieve the purpose of inhibiting the penetration of CO2 and providing good support function, the effect of improving the processing capacity

Inactive Publication Date: 2019-08-30
SUZHOU BEST COLOR ENVIRONMENTAL PROTECTION NANOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hollow fiber membrane products currently used in the domestic and foreign markets for the treatment of black and odorous rivers are only purely oxygenated, and there is no bio-aggregation, which cannot form a stable ecosystem and cannot fundamentally solve the black and odor problem.

Method used

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  • Fiber tube reinforced hollow fiber composite biofilm as well as preparation method and application thereof
  • Fiber tube reinforced hollow fiber composite biofilm as well as preparation method and application thereof
  • Fiber tube reinforced hollow fiber composite biofilm as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: Preparation of Fiber Tube Reinforced Hollow Fiber Composite Biofilm

[0032] First, immerse the fiber braided tube in sodium hydroxide aqueous solution to remove the oil stains on the braided tube; then use deionized water to clean the residual sodium hydroxide on the surface of the braided tube, and finally dry the braided tube for use.

[0033] Casting solution formula: in terms of mass percentage, the raw material components are:

[0034]

[0035] Wherein the pore-forming agent is polyvinylpyrrolidone, and the nanoparticles are titanium dioxide.

[0036] The casting solution was added into a stirring tank, stirred and dissolved at 40°C for 12 hours, then transferred to a defoaming tank, and left in the defoaming tank at 40°C for 4 hours to obtain a homogeneous casting solution. The degassed homogeneous casting solution is squeezed from the degassing tank into the spinneret under nitrogen pressure, and the pretreated braided tube passes through the cent...

Embodiment 2

[0037] Embodiment 2: Observation of membrane structure morphology

[0038] The cross-section and inner and outer surfaces of the prepared fiber tube-reinforced hollow fiber composite biofilm were observed by scanning electron microscope. The specific steps are: (1) immerse the wet fiber tube reinforced hollow fiber composite biofilm sample in liquid nitrogen for freezing and brittle fracture; (2) soak the broken membrane in 50%, 75%, and 100% concentration of Carry out dehydration in alcohol, immersion time is 1 hour respectively, then air-dry naturally in the air; (3) fix film sample on the sample stage, and gold-plate in cathodic vacuum sputtering device; (4) prepare The sample was sent to the scanning electron microscope observation platform for observation and photography, and the results were as follows: figure 1 shown.

Embodiment 3

[0039] Embodiment 3: the mensuration of membrane inner and outer diameter and wall thickness

[0040]The inner and outer diameters and wall thickness of the fiber tube-reinforced hollow fiber composite biofilm were measured by an optical microscope with a ruler. The specific method is to cut the wet fiber tube reinforced hollow fiber composite biomembrane vertically with a blade, and keep the flatness of the cross section of the membrane filament, and read the inner and outer diameters of the fiber with the built-in ruler under the BZ61 binocular optical microscope. Under each spinning condition, 5 samples were taken for measurement, and the inner and outer diameters were averaged.

[0041] After testing, the fiber tube-reinforced hollow fiber membrane prepared in Example 1 has an inner diameter of 0.8 mm and an outer diameter of 2.1 mm.

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Abstract

The invention discloses a fiber tube reinforced hollow fiber composite biofilm as well as a preparation method and application thereof. According to the invention, a coating-immersion precipitation phase transformation method is adopted for utilizing a composite film spinning device to coat a braided tube by a casting solution liquid to prepare the fiber tube reinforced hollow fiber composite biofilm with high strength and high flux. The product provided by the invention has a large specific surface area, in particular, the specific surface area of the oxygen permeable film can be as high as 5108 m<2>/m<3>; the film is used as a carrier, a sufficient adhesion area can be provided for growth of microorganisms in a smaller space, so that a concentration of the microorganisms in the unit space is greatly improved, the treatment capacity per unit volume can be improved, and the aeration efficiency is high; the film has the characteristics of selective ventilation, and the oxygen absorptioncapacity is multiple times that of conventional equipment; and the product has the high-efficiency oxygen separation characteristic, so that the microorganisms are attached to the surface of the biofilm to form a biotic community to naturally form a stable ecosystem, the efficiency of biological absorption of water pollutants is accelerated, and the black odor problem can be thoroughly solved.

Description

technical field [0001] The invention relates to a fiber tube-reinforced hollow fiber composite biomembrane and its preparation method and application, belonging to the technical field of hollow fiber membrane preparation. Background technique [0002] In the case of increasingly serious river pollution, the research and application of membrane separation technology has been highly valued. With the continuous expansion of the application field of membrane separation technology, the requirements for the performance of membrane materials are also getting higher and higher. The performance of the hollow fiber membrane obtained by the traditional solution spinning (ie solution phase inversion) method can no longer meet the needs of the application and development of membrane separation technology. In particular, the tensile strength of the membrane is low, which cannot meet the requirements for the mechanical properties of the membrane in the process of river ecological managemen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/08B01D69/02B01D67/00B01D71/34C02F3/10
CPCB01D67/0079B01D69/02B01D69/08B01D71/34B01D2325/022B01D2325/36B01D2325/40C02F3/102C02F3/108C02F2103/007Y02W10/10
Inventor 周宁张克勤董伊航
Owner SUZHOU BEST COLOR ENVIRONMENTAL PROTECTION NANOTECH CO LTD
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