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Formaldehyde purifying fiber and preparation method thereof

A formaldehyde purification and fiber technology, applied in the field of formaldehyde removal, can solve the problems of dust pollution, heavy quality, etc., and achieve the effect of high load capacity, light weight and good air permeability

Active Publication Date: 2018-11-13
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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  • Formaldehyde purifying fiber and preparation method thereof
  • Formaldehyde purifying fiber and preparation method thereof
  • Formaldehyde purifying fiber and preparation method thereof

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

The invention provides a preparation method of formaldehyde purifying fiber. The preparation method comprises the following steps: preparing a first spinning solution by dissolving a first polymer inan organic solvent, carrying out electrostatic spinning and vacuum drying, immersing in a dopamine modified solution, and washing, thus obtaining first polymer fiber; or preparing a second spinning solution by dissolving a second polymer in the organic solvent, and carrying out the electrostatic spinning and ultraviolet irradiation, thus obtaining second polymer fiber; immersing the first polymerfiber and / or the second polymer fiber in a solution containing precious metal ions, combining the first polymer fiber and / or the second polymer fiber with the precious metal ions, then immersing in asodium borohydride solution, converting the precious metal ions into a precious metal elementary substance or a precious metal compound, and then taking out the precious metal elementary substance orthe precious metal compound, thus obtaining the formaldehyde purifying fiber. The formaldehyde purifying fiber provided by the invention is light in fiber weight, good in air permeability, high in stability and high in load capacity and can be used as a catalyst for catalyzing the conversion of formaldehyde, and a high formaldehyde conversion rate can be achieved by adsorbing 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 Applications(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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