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A kind of preparation method of nanofiber membrane formaldehyde detection test paper

A nanofiber membrane, detection test paper technology, applied in fiber processing, textile and papermaking, color/spectral property measurement, etc., can solve the problems of poor reproducibility of formaldehyde detection methods, unstable reagent properties, secondary pollution, etc. Conducive to accurate measurement, improved detection sensitivity, good adhesion effect

Inactive Publication Date: 2014-10-15
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a nanofiber membrane formaldehyde detection test paper to solve the problems of poor reproducibility, difficult operation, unstable reagent properties and secondary pollution of the above-mentioned formaldehyde detection method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) At room temperature, 3 grams of nylon 6 (molecular weight 18,000) were dissolved in a stirred tank containing 17 grams of formic acid with a mass fraction of 88%, and stirred at a speed of 500 rpm for 18 hours to obtain mass Nylon 6 spinning solution with a fraction of 15%.

[0021] (2) Under the conditions of room temperature and relative humidity of 20%, the spinning solution is input to the spinneret of the electrospinning equipment at a flow rate of 0.1 ml per hour, and the spinneret is connected to a 30,000-volt power supply for electrospinning Silk, the receiving device is glossy paper, and the distance between the receiving device and the spinneret is 20 centimeters to obtain a nylon 6 nanofiber film. And place the nylon 6 nanofiber membrane in a vacuum drying oven to dry, the vacuum degree is 0.1 MPa, the temperature is 60 degrees Celsius, and the drying time is 1 hour.

[0022] (3) 5 grams of methanol with a mass fraction of 99.5%, 1 gram of glycerin with ...

Embodiment 2

[0027] (1) At room temperature, 12 grams of ethyl cellulose (molecular weight 44900) are dissolved in a stirred tank that is equipped with 28 grams of mass fraction of 99% trifluoroacetic acid, stirred at 300 rpm for a stirring time of 1 Hours, the ethyl cellulose spinning solution with a mass fraction of 30% was obtained.

[0028] (2) Under the conditions of room temperature and relative humidity of 50%, the spinning solution is input to the spinneret of the electrospinning equipment at a flow rate of 1.5 ml per hour, and the spinneret is connected to a power supply of 18,000 volts for electrospinning Silk, the receiving device is aluminum foil, the distance between the receiving device and the spinneret is 15 cm, and the nanofiber film is obtained, and the nanofiber film is placed in a vacuum drying oven to dry, the vacuum degree is 0.1 MPa, and the temperature is 55 degrees Celsius , drying time is 2 hours.

[0029] (3) 6 grams of methanol with a mass fraction of 99.5%, 2 gr...

Embodiment 3

[0034] (1) At room temperature, 5 grams of cellulose acetate (molecular weight 100,000) is dissolved in 99.5% acetone and 15 grams of 99% N,N-dimethylacetamide mixed solvent in mass fraction of 30 grams In a stirred tank, the mixture was stirred at a speed of 950 rpm for 10 hours to obtain a cellulose acetate spinning solution with a mass fraction of 10%.

[0035] (2) Under the conditions of room temperature and relative humidity of 40%, the spinning solution is input to the spinneret of the electrospinning equipment at a flow rate of 0.2 ml per hour, and the spinneret is connected to a 15,000-volt power supply for electrospinning Silk, the receiving device is a copper mesh, and the distance between the receiving device and the spinneret is 15 cm to obtain a nanofiber film. The nanofiber membrane was dried in a vacuum drying oven with a vacuum degree of 0.1 MPa, a temperature of 45 degrees Celsius, and a drying time of 0.5 hour to obtain a nanofiber sensing membrane.

[0036]...

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Abstract

The invention provides a preparation method of a nanofiber membrane formaldehyde test paper. The preparation method is characterized by comprising the following steps of 1, preparing a polymer solution, 2, carrying out electrostatic spinning to prepare a nanofiber membrane, putting the nanofiber membrane into a vacuum drying oven, and drying, 3, preparing a mixed solution, 4, preparing a color-developing agent solution which is a mixture of one or more of an enaminone functional group-containing compound and its derivatives, 5, cutting the nanofiber membrane into quadrate nanofiber membrane pieces having sizes of 1*1cm at a room temperature, dipping the quadrate nanofiber membrane pieces into the color-developing agent solution obtained by the step 4 for 5s to 1min, and taking them out to obtain white nanofiber membranes which are the nanofiber membrane formaldehyde test papers. The nanofiber membrane formaldehyde test paper is intuitive, has high sensitivity and good selectivity, can be carried easily and can produce a color change having a certain rule. The preparation method adopts simple production equipment, has a low cost, does not produce harmful substances and can realize fast and real-time detection.

Description

technical field [0001] The invention relates to a method for preparing a nanofiber film formaldehyde detection test paper, which belongs to the field of nano functional materials. Background technique [0002] Formaldehyde is one of the main pollutants in indoor air. It is a carcinogenic and teratogenic substance confirmed by the World Health Organization. It has been generally regarded as the number one indoor killer by all walks of life. The maximum allowable concentration of formaldehyde stipulated in my country's health standards is 60ppb. Decoration materials, adhesives in artificial wood panels used in new combined furniture, cosmetics, chemical fiber floors, preservatives, etc. will release formaldehyde, which will affect human health. Formaldehyde detection before moving into a new house has become an essential procedure. However, among the current conventional detection methods, spectrophotometry is limited by operating conditions such as water bath and concentrate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M13/335D06M13/328D06M13/368D06M13/355D04H1/728G01N21/25G01N21/29
Inventor 丁彬王雪琴斯阳李彦任韬俞建勇孙刚
Owner DONGHUA UNIV
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