Ethylene urea/polyvinyl alcohol composite formaldehyde-removing fiber as well as preparation method and application thereof

A technology of polyvinyl alcohol and ethylene urea, applied in the direction of chemical characteristics of fibers, single-component synthetic polymer rayon, rayon manufacturing, etc., to achieve the effects of developing specific surface area, reducing environmental hazards, and excellent formaldehyde removal performance

Pending Publication Date: 2022-06-10
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Glycerin plasticizer is the most used at present, but when single glycerin plasticizes polyvinyl alcohol, the color of the product will be dark, and the plasticizer is easy to precipitate when stored for a long time, making the product brittle, and the product is susceptible to the precipitation of the plasticizer. pollution
Compounding ethylene urea and glycerin as a plasticizer for polyvinyl alcohol melt spinning has never been reported in the literature

Method used

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  • Ethylene urea/polyvinyl alcohol composite formaldehyde-removing fiber as well as preparation method and application thereof
  • Ethylene urea/polyvinyl alcohol composite formaldehyde-removing fiber as well as preparation method and application thereof
  • Ethylene urea/polyvinyl alcohol composite formaldehyde-removing fiber as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The prepared ethylene urea / polyvinyl alcohol composite formaldehyde-removing fiber with formaldehyde-removing function was set up in accordance with the national standard QB-T2761-2006 "Determination of Purification Effect of Indoor Air Purification Products" to build an experimental device for experimental testing. After 24 hours, the concentration of formaldehyde in the blank cabin was 4.20 mg / m3, and the concentration of formaldehyde in the sample cabin was 0.41 mg / m3. According to the calculation method required by this standard, it can be obtained that the formaldehyde removal rate of the fiber material with formaldehyde removal function can reach 85% within 24 hours.

[0025] Example 3

The preparation method of the ethylene urea / polyvinyl alcohol composite formaldehyde-removing fiber of this embodiment, the steps are as follows:

Put 85 grams of polyvinyl alcohol (PVA2499), 10 grams of glycerin, and 20 grams of ethylene urea into a high-speed mixer and mix evenl...

Embodiment 2

Put 78 grams of polyvinyl alcohol (PVA1799), 20 grams of glycerin, and 11 grams of ethylene urea into a high-speed mixer and mix evenly; stand at 65°C for 3.5 hours to fully swell. The swollen ethylene urea / polyvinyl alcohol is spun according to the melt spinning method, the spinning temperature is 195°C, the spinning speed is 250m / min, and the draft ratio is 3 times, and the ethylene urea / polyvinyl alcohol is obtained Composite formaldehyde removal fiber.

[0032] The prepared ethylene urea / polyvinyl alcohol composite formaldehyde-removing fiber with formaldehyde-removing function was set up in accordance with the national standard QB-T2761-2006 "Method for Determination of Purification Effect of Indoor Air Purification Products", and the experimental test was carried out. After 24 hours, the concentration of formaldehyde in the blank cabin was 4.05 mg / m3, and the concentration of formaldehyde in the sample cabin was 0.49 mg / m3. According to the calculation method required by...

Embodiment 3

Put 35 grams of polyvinyl alcohol (PVA2488), 35 grams of polyvinyl alcohol (PVA2499), 16 grams of glycerin, and 18 grams of ethylene urea into a high-speed mixer and mix evenly; stand at 74 ° C for 5 hours to fully swell. The swollen ethylene urea / polyvinyl alcohol is spun according to the melt spinning method, the spinning temperature is 198°C, the spinning speed is 320m / min, and the draft ratio is 2 times, and the ethylene urea / polyvinyl alcohol is obtained Composite formaldehyde removal fiber.

[0036] The prepared ethylene urea / polyvinyl alcohol composite formaldehyde-removing fiber with formaldehyde-removing function was set up in accordance with the national standard QB-T2761-2006 "Method for Determination of Purification Effect of Indoor Air Purification Products", and the experimental test was carried out. After 24 hours, the concentration of formaldehyde in the blank cabin was 4.15 mg / m3, and the concentration of formaldehyde in the sample cabin was 0.47 mg / m3. Accord...

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Abstract

The invention belongs to the field of preparation of composite fibers, and relates to an ethylene urea / polyvinyl alcohol composite formaldehyde-removing fiber as well as a preparation method and application thereof. Uniformly mixing polyvinyl alcohol, glycerol and ethylene urea, and standing to fully swell to obtain a spinning solution; and carrying out melt spinning on the spinning solution to obtain the ethylene urea / polyvinyl alcohol composite formaldehyde-removing fiber. According to the invention, polyvinyl alcohol is plasticized and modified by using a glycerol and ethylene urea composite plasticizer, and then the ethylene urea / polyvinyl alcohol composite formaldehyde-removing fiber is prepared by using a melt spinning process, so that some procedures in a solution spinning process, such as dissolution of a polymer, filtration of a spinning solution and recovery of a solvent, are omitted; meanwhile, no solvent participates in the spinning process, so that the harm to the environment is reduced. The method is simple in production process, small in environmental pollution and low in production cost.

Description

technical field [0001] The invention belongs to the field of composite fiber preparation, and relates to a ethylene urea / polyvinyl alcohol composite formaldehyde-removing fiber and a preparation method and application thereof. Background technique [0002] As a primary toxic substance, formaldehyde has toxic effects on the human body, including central nervous system toxicity, reproductive system toxicity, cardiovascular system toxicity, respiratory system toxicity and immune system toxicity. For different types of formaldehyde pollution, the treatment methods include activated carbon physical adsorption, photocatalytic oxidation, plasma decomposition, chemical reaction and biodegradation and other formaldehyde removal technologies. However, among the above-mentioned formaldehyde removal methods, the chemical reaction formaldehyde removal technology has a wide application range, the highest formaldehyde removal efficiency, low cost, and convenient operation, so this technolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/50D01F1/10
CPCD01F6/50D01F1/10
Inventor 潘玮张锦涛普玉霞秦雅洁裴海燕张慧勤陈燕张卓锐
Owner ZHONGYUAN ENGINEERING COLLEGE
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