Preparation method of sparse/dense periodically stacked flocculent fiber filtering material

Abstract

The invention discloses a preparation method of a sparse / dense periodically stacked flocculent fiber filtering material. The preparation method is characterized in that an electrostatic spinning device is adopted, a liquid supply device is filled with a spinning liquid, a micro needle type auxiliary electrode is negatively charged or positively charged by regulating and controlling an alternating power supply in the spinning process, spinning jet flow is subjected to attractive force or repulsive force when approaching the receiving substrate, a compact flocculent fiber filtering material is obtained when the spinning jet flow is subjected to the attractive force, and a fluffy flocculent fiber filtering material is obtained when the spinning jet flow is subjected to the repulsive force; and the alternating power supply is regularly adjusted according to requirements, so that the sparse / dense periodically stacked flocculent fiber filtering material is obtained. The invention provides an efficient and convenient preparation method of a flocculent fiber high-temperature filtering material with a catalytic function.

Description

technical field

[0001] The invention relates to a preparation method of a high-temperature filter material with sparse / dense periodic stacked floc fibers, belonging to the technical field of air filter materials. Background technique

[0002] With the rapid development of our society, the environmental problems caused by industrial metallurgy, iron and steel, thermal power generation, etc. are becoming more and more significant. Filtering the smoke and dust generated by these industries will be the key to improving air quality. At present, the commonly used air filter materials are mainly glass fiber, polyphenylene sulfide, ceramic fiber, etc. Although these materials have high temperature resistance, their aggregate pore size is large, and it is difficult to filter fine particles (diameter > 0.3 μm) in the smoke and dust. Filtration; and its preparation process is complicated and the cost is high.

[0003] The nanofiber material prepared by electrospinning has the advan...

Examples

Embodiment 1

[0034] A method for preparing a sparse / dense periodic stacked floc fiber filter material: inject the spinning liquid into the electrospinning device, and control the needle-type auxiliary electrode 5 on the receiving substrate 6 to be negatively or positively charged during the spinning process. The spinning jet is subjected to attraction or repulsion when it is close to the receiving substrate 6, thereby obtaining fluffy-dense-fluffy periodic stacked floc fiber high-temperature filter material in one step; the spinning solution is made of polyimide (content is 6wt%, temperature-resistant 250°C), carbon nanotubes (content 0.02wt%, average particle size 80nm) and N,N-dimethylformamide.

[0035] The electrospinning device is composed of a micro-needle auxiliary electrode 5, an alternating power supply 4, a liquid supply device 2, a slit spinneret 3 and a high-voltage power supply 1; the micro-needle auxiliary electrode 5 is composed of metal needles arranged in an array, The arr...

Embodiment 2

[0038] A method for preparing a sparse / dense periodic stacked floc fiber filter material: inject the spinning liquid into the electrospinning device, and control the needle-type auxiliary electrode 5 on the receiving substrate 6 to be negatively or positively charged during the spinning process. The spinning jet is subjected to attractive or repulsive force when it is close to the receiving substrate 6, thereby obtaining fluffy-dense-fluffy periodic stacked floc fiber high-temperature filter material in one step; ℃), conductive titanium dioxide (content 0.005wt%, average particle size 30nm) and N,N-dimethylacetamide.

[0039] The electrospinning device is composed of a micro-needle auxiliary electrode 5, an alternating power supply 4, a liquid supply device 2, a slit spinneret 3 and a high-voltage power supply 1; the micro-needle auxiliary electrode 5 is composed of metal needles arranged in an array, The arrangement of the metal needles is rectangular, the material is aluminu...

Embodiment 3

[0042] A method for preparing a sparse / dense periodic stacked floc fiber filter material: inject the spinning liquid into the electrospinning device, and control the needle-type auxiliary electrode 5 on the receiving substrate 6 to be negatively or positively charged during the spinning process. The spinning jet is subjected to attraction or repulsion when it is close to the receiving substrate 6, thereby obtaining fluffy-dense-fluffy periodic stacked floc fiber high-temperature filter material in one step; the spinning solution is made of polyimide (content is 6wt%, temperature-resistant 230°C), conductive iron dioxide (content 0.02wt%, average particle size 80nm) and N-methylpyrrolidone.

[0043] The electrospinning device is composed of a micro-needle auxiliary electrode 5, an alternating power supply 4, a liquid supply device 2, a slit spinneret 3 and a high-voltage power supply 1; the micro-needle auxiliary electrode 5 is composed of metal needles arranged in an array, Th...

technical field

[0001] The invention relates to a preparation method of a high-temperature filter material with sparse / dense periodic stacked floc fibers, belonging to the technical field of air filter materials. Background technique

[0002] With the rapid development of our society, the environmental problems caused by industrial metallurgy, iron and steel, thermal power generation, etc. are becoming more and more significant. Filtering the smoke and dust generated by these industries will be the key to improving air quality. At present, the commonly used air filter materials are mainly glass fiber, polyphenylene sulfide, ceramic fiber, etc. Although these materials have high temperature resistance, their aggregate pore size is large, and it is difficult to filter fine particles (diameter > 0.3 μm) in the smoke and dust. Filtration; and its preparation process is complicated and the cost is high.

[0003] The nanofiber material prepared by electrospinning has the advan...

Examples

Embodiment 1

[0034] A method for preparing a sparse / dense periodic stacked floc fiber filter material: inject the spinning liquid into the electrospinning device, and control the needle-type auxiliary electrode 5 on the receiving substrate 6 to be negatively or positively charged during the spinning process. The spinning jet is subjected to attraction or repulsion when it is close to the receiving substrate 6, thereby obtaining fluffy-dense-fluffy periodic stacked floc fiber high-temperature filter material in one step; the spinning solution is made of polyimide (content is 6wt%, temperature-resistant 250°C), carbon nanotubes (content 0.02wt%, average particle size 80nm) and N,N-dimethylformamide.

[0035] The electrospinning device is composed of a micro-needle auxiliary electrode 5, an alternating power supply 4, a liquid supply device 2, a slit spinneret 3 and a high-voltage power supply 1; the micro-needle auxiliary electrode 5 is composed of metal needles arranged in an array, The arr...

Embodiment 2

[0038] A method for preparing a sparse / dense periodic stacked floc fiber filter material: inject the spinning liquid into the electrospinning device, and control the needle-type auxiliary electrode 5 on the receiving substrate 6 to be negatively or positively charged during the spinning process. The spinning jet is subjected to attractive or repulsive force when it is close to the receiving substrate 6, thereby obtaining fluffy-dense-fluffy periodic stacked floc fiber high-temperature filter material in one step; ℃), conductive titanium dioxide (content 0.005wt%, average particle size 30nm) and N,N-dimethylacetamide.

[0039] The electrospinning device is composed of a micro-needle auxiliary electrode 5, an alternating power supply 4, a liquid supply device 2, a slit spinneret 3 and a high-voltage power supply 1; the micro-needle auxiliary electrode 5 is composed of metal needles arranged in an array, The arrangement of the metal needles is rectangular, the material is aluminu...

Embodiment 3

[0042] A method for preparing a sparse / dense periodic stacked floc fiber filter material: inject the spinning liquid into the electrospinning device, and control the needle-type auxiliary electrode 5 on the receiving substrate 6 to be negatively or positively charged during the spinning process. The spinning jet is subjected to attraction or repulsion when it is close to the receiving substrate 6, thereby obtaining fluffy-dense-fluffy periodic stacked floc fiber high-temperature filter material in one step; the spinning solution is made of polyimide (content is 6wt%, temperature-resistant 230°C), conductive iron dioxide (content 0.02wt%, average particle size 80nm) and N-methylpyrrolidone.

[0043] The electrospinning device is composed of a micro-needle auxiliary electrode 5, an alternating power supply 4, a liquid supply device 2, a slit spinneret 3 and a high-voltage power supply 1; the micro-needle auxiliary electrode 5 is composed of metal needles arranged in an array, Th...

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