A formaldehyde purification fiber and its preparation method

A formaldehyde purification and fiber technology, applied in the field of formaldehyde removal, can solve the problems of heavy weight and dust pollution, and achieve the effects of light weight, high load and simple preparation process

Active Publication Date: 2020-07-28
SHENZHEN KFAIR ENVIRONMENTAL TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned carriers all exist in the form of powder or nanoparticles, which are easy to cause dust pollution and heavy in daily life, and need to load more active components

Method used

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  • A formaldehyde purification fiber and its preparation method
  • A formaldehyde purification fiber and its preparation method
  • A formaldehyde purification fiber and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A preparation method of formaldehyde purification fiber, comprising:

[0047] Polymethyl methacrylate is dissolved in N,N-dimethylformamide (DMF) to prepare spinning solution, wherein the mass concentration of polymethyl methacrylate in the spinning solution is 30%, on the electrospinning machine Spinning was carried out, and then dried in vacuum for 6 hours to obtain white polymethyl methacrylate fibers.

[0048] Mix 22.5mL of distilled water, 10mL of absolute ethanol, 0.5mL of ammonia water, and 0.125g of dopamine hydrochloride evenly to prepare a dopamine-modified solution. Place polymethyl methacrylate fibers in the dopamine-modified solution and place them on a shaker at room temperature for 12 hours. Under alkaline conditions, dopamine oxidizes and self-polymerizes on fibers, washes with water until the aqueous solution is colorless, then soaks in 15% isopropanol aqueous solution for 20 minutes to remove unreacted dopamine, rinses with water for 3-5 times , freez...

Embodiment 2

[0051] A preparation method of formaldehyde purification fiber, comprising:

[0052] Polymethyl methacrylate and polyvinylidene fluoride were dissolved in N,N-dimethylformamide (DMF) to prepare a spinning solution, wherein the mass concentration of polymethyl methacrylate in the spinning solution was 15%, The mass concentration of polyvinylidene fluoride is 20%. Spinning was carried out on an electrospinning machine, and the electrospinning parameters were: anode voltage 8kV, cathode voltage -4kV, sample injection speed 0.4ml / h, rotation speed 60 rpm, spinning temperature 20°C, humidity 40%. The spun fibers were vacuum-dried at 50° C. for 7 hours to obtain polymethyl methacrylate fibers.

[0053] Mix 15mL of distilled water, 5mL of absolute ethanol, 0.3mL of ammonia water, and 0.05g of dopamine hydrochloride evenly to prepare a dopamine modification solution. Put polymethyl methacrylate fibers in the dopamine modification, soak them at room temperature for 24 hours, and then ...

Embodiment 3

[0056] A preparation method of formaldehyde purification fiber, comprising:

[0057] Mix polyvinylpyrrolidone and polyvinylidene fluoride at a mass ratio of 3:2, and dissolve them in chloroform to prepare a spinning solution, wherein the mass concentration of polyvinylpyrrolidone in the spinning solution is 10%. Spinning was carried out on an electrospinning machine, and the electrospinning parameters were: anode voltage 25kV, cathode voltage -2kV, sample injection speed 1ml / h, rotation speed 180 rpm, spinning temperature 30°C, humidity 60%. The spun fiber is at 50μW / cm 2 Irradiation was carried out for 4 hours under the intensity of ultraviolet light, and a cross-linking reaction was carried out to prepare the second polymer fiber.

[0058] Prepare chloroplatinic acid solution, wherein the molar concentration of platinum ions is 0.035mol / L. The second polymer fiber is placed in it, placed on a shaker at room temperature and soaked for 80 hours, then soaked in a 0.03 mol / L s...

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Abstract

Provided is a method for preparing a formaldehyde purification fiber, the method involving dissolving a first polymer in an organic solvent to formulate a first spinning solution, and carrying out electrostatic spinning and vacuum drying on same, and then placing same in a dopamine modification solution for soaking, and washing same so as to obtain a first polymer fiber; or, dissolving a second polymer in an organic solvent to formulate a second spinning solution, and carrying out electrostatic spinning and UV irradiation on same so as to obtain a second polymer fiber; and placing the first polymer fiber and / or the second polymer fiber into a solution containing noble metal ions for soaking so as to combine the first polymer fiber and / or the second polymer fiber with the noble metal ions; then placing same into a sodium borohydride solution for soaking so as to convert the noble metal ions into a noble metal elementary substance or a noble metal compound, subsequently removing same and washing same to obtain the formaldehyde purification fiber. The fiber has a light mass, good air permeability, high stability, and a high loading capacity, and can be used as a catalyst for catalyzing the conversion of formaldehyde, and can achieve a high formaldehyde conversion rate by means of absorbing a small amount of active components.

Description

technical field [0001] The invention relates to the technical field of formaldehyde removal, in particular to a formaldehyde purification fiber and a preparation method thereof. Background technique [0002] Formaldehyde is one of the most common indoor pollutants. Long-term inhalation of formaldehyde can cause great damage to human health. The existing formaldehyde purification methods mainly include adsorption method, photocatalytic oxidation method, catalytic combustion method and so on. Among them, the adsorption method cannot degrade formaldehyde. When the temperature changes, the adsorbed formaldehyde will desorb and cause secondary pollution; photocatalytic technology requires a specific light source, and the light utilization rate is low, which can cause secondary pollution during the removal process, and The high cost of catalytic equipment makes it difficult to promote and apply it on a large scale. Therefore, the most commonly used formaldehyde purification meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/83B01D53/86B01D53/72D06M101/22D06M101/24D06M101/26D06M101/28
CPCB01D53/8668D06M11/83D06M2101/22D06M2101/24D06M2101/26D06M2101/28
Inventor 杜冰赫法贵陈家枢高福
Owner SHENZHEN KFAIR ENVIRONMENTAL TECH DEV CO LTD
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