CN117926435A - Preparation method and application of homogeneous microporous material - Google Patents
Preparation method and application of homogeneous microporous material Download PDFInfo
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- CN117926435A CN117926435A CN202410337946.0A CN202410337946A CN117926435A CN 117926435 A CN117926435 A CN 117926435A CN 202410337946 A CN202410337946 A CN 202410337946A CN 117926435 A CN117926435 A CN 117926435A
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- extruder
- polyether ester
- polyacrylamide
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- 239000012229 microporous material Substances 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title abstract description 21
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 50
- 229920000570 polyether Polymers 0.000 claims abstract description 50
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 47
- 239000000463 material Substances 0.000 claims abstract description 41
- 150000002148 esters Chemical class 0.000 claims abstract description 38
- 239000000835 fiber Substances 0.000 claims abstract description 32
- 238000002156 mixing Methods 0.000 claims abstract description 27
- 238000007639 printing Methods 0.000 claims abstract description 23
- 229920006146 polyetheresteramide block copolymer Polymers 0.000 claims abstract description 18
- 238000002844 melting Methods 0.000 claims description 28
- 230000008018 melting Effects 0.000 claims description 28
- 238000007599 discharging Methods 0.000 claims description 16
- 229920000728 polyester Polymers 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 9
- 230000010358 mechanical oscillation Effects 0.000 claims description 8
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 5
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 5
- 239000002202 Polyethylene glycol Substances 0.000 claims description 4
- 229920001223 polyethylene glycol Polymers 0.000 claims description 4
- -1 polyethylene terephthalate Polymers 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 abstract description 11
- 238000000197 pyrolysis Methods 0.000 abstract description 4
- 239000011148 porous material Substances 0.000 abstract description 3
- 229920002994 synthetic fiber Polymers 0.000 abstract description 2
- 238000009987 spinning Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009998 heat setting Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 241000208202 Linaceae Species 0.000 description 1
- 235000004431 Linum usitatissimum Nutrition 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000002074 melt spinning Methods 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
- D01D1/06—Feeding liquid to the spinning head
- D01D1/065—Addition and mixing of substances to the spinning solution or to the melt; Homogenising
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
- D01D1/06—Feeding liquid to the spinning head
- D01D1/09—Control of pressure, temperature or feeding rate
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
- D01D1/10—Filtering or de-aerating the spinning solution or melt
- D01D1/103—De-aerating
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor
- D01D5/247—Discontinuous hollow structure or microporous structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2205/00—Foams characterised by their properties
- C08J2205/04—Foams characterised by their properties characterised by the foam pores
- C08J2205/044—Micropores, i.e. average diameter being between 0,1 micrometer and 0,1 millimeter
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention relates to the technical field of synthetic materials, in particular to a preparation method and application of a homogeneous microporous material, which comprises the following preparation steps: s1, polyether ester and polyacrylamide are taken; s2, feeding polyether ester into a feed inlet of an extruder, and feeding the polyether ester to the side of polyacrylamide; s3, melt blending to obtain a mixed material; s4, the mixed materials enter a mixing section of the extruder; s5, extruding to obtain homogeneous microporous fibers; and S6, stretching to obtain the homogeneous microporous filament. The invention takes the gas generated by preliminary pyrolysis of polyacrylamide as micro-gas nuclear cavitation bubbles, uniformly distributes the incompletely pyrolyzed polyacrylamide in polyether ester through cavitation generated by ultrasonic waves, and breaks out the bubbles by continuous heating to obtain filaments with uniform open pore structures on the outer surface and uniform nanoscale and communicated honeycomb structures in the inner part, and the filaments are applied to printing materials.
Description
Technical Field
The invention relates to the technical field of synthetic materials, in particular to a preparation method and application of a homogeneous microporous material.
Background
In the process of fiber or film melting and spinning, as the outer layer firstly contacts with cold air and is stretched by external force at the same time when being solidified, the outer layer of the fiber or film formed by melting and spinning has the characteristics of high orientation degree, high crystallinity and compact structure. When the fiber or film formed by melt spinning is subjected to digital printing and dyeing or digital printing, the ink cannot quickly vertically permeate into the inner layer due to the obstruction of the outer layer, so that the ink is laterally diffused, and the printed or dyed pattern boundary is unclear.
Cotton flax belonging to natural fibers has an outer skin layer with a compact structure, while wool belonging to natural fibers has a scale layer with a compact structure, and the scale layer cannot enable ink to vertically permeate into the fibers so as to form transverse permeation and diffusion.
The Chinese patent application with publication number CN110685025A discloses a production process of porous polyester staple fibers, which comprises the steps of uniformly mixing high-oxygen polyester particles and polyester bottle flakes through stirring, heating the high-oxygen polyester particles to quickly expand a melting liquid to generate dense bubbles, and spraying the melting liquid with the dense bubbles through a spinneret plate to obtain porous filaments. However, the flow of the polyester bottle flakes during the melting process can cause maldistribution of the high-oxygen polyester particles, resulting in maldistribution of the final bubbles, and if continuous stirring is used, the stirring operation can destroy the bubbles.
Disclosure of Invention
The invention aims to provide a preparation method and application of a homogeneous microporous material, so as to solve the problems in the background technology.
In order to achieve the above object, in one aspect, the present invention provides the following technical solutions: a method for preparing a homogeneous microporous material, comprising the steps of:
s1, taking polyether ester and polyacrylamide, wherein the melting point of the polyether ester is 200-230 ℃, and the addition amount of the polyacrylamide is 0.1% -5.0% of the mass of the polyether ester;
S2, setting the temperature of a feeding section of the extruder to be 100-120 ℃, feeding polyether ester into a feeding port of the extruder, and feeding polyacrylamide into the extruder in a side feeding mode;
S3, setting the temperature of a melting section of the extruder to be 210-240 ℃, enabling polyether ester and polyacrylamide to enter the melting section of the extruder for melt blending to obtain a mixed material, and opening an ultrasonic transducer, wherein the ultrasonic transducer generates high-frequency mechanical oscillation on the mixed material;
S4, setting the temperature of a mixing section of the extruder to 241-280 ℃, and enabling the mixed material to enter the mixing section of the extruder;
S5, setting the temperature of a discharging section of the extruder to 281-295 ℃, and extruding the mixed material through a die head of the extruder after passing through the discharging section of the extruder to obtain the homogeneous microporous fiber;
And S6, conveying the homogeneous microporous fiber into a stretcher for stretching to obtain the homogeneous microporous filament.
Alternatively, the polyether ester is composed of polyether blocks and polyester blocks, wherein the mass of the polyether blocks accounts for 4% of the total mass of the polyether ester; the polyether block is polyethylene glycol with the number average molecular weight of 1000, and the polyester block is polyethylene terephthalate.
Optionally, the ultrasonic frequency emitted by the ultrasonic transducer is 10000-60000 Hz.
On the other hand, the invention also provides the following technical scheme: the application of the homogeneous microporous material is that the homogeneous microporous material is prepared by adopting the preparation method of the homogeneous microporous material, and the homogeneous microporous material is used as a printing material.
Compared with the prior art, the invention has the following beneficial effects: the invention takes the gas generated by preliminary pyrolysis of polyacrylamide as micro-gas nuclear cavitation bubbles, uniformly distributes the incompletely pyrolyzed polyacrylamide in polyether ester through cavitation generated by ultrasonic waves, and breaks out the bubbles by continuous heating to obtain filaments with uniform open pore structures on the outer surface and uniform nanoscale and communicated honeycomb structures in the inner part, and the filaments are applied to printing materials.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1: the invention provides a preparation method of a homogeneous microporous material, which comprises the following preparation steps:
s1, taking polyether ester and polyacrylamide, wherein the melting point of the polyether ester is 200-230 ℃, and the addition amount of the polyacrylamide is 0.1% of the mass of the polyether ester;
S2, setting the temperature of a feeding section of the extruder to be 100-120 ℃, feeding polyether ester into a feeding port of the extruder, and feeding polyacrylamide into the extruder in a side feeding mode;
S3, setting the temperature of a melting section of the extruder to be 210-240 ℃, enabling polyether ester and polyacrylamide to enter the melting section of the extruder for melt blending to obtain a mixed material, and opening an ultrasonic transducer, wherein the ultrasonic transducer generates high-frequency mechanical oscillation on the mixed material;
S4, setting the temperature of a mixing section of the extruder to 241-280 ℃, and enabling the mixed material to enter the mixing section of the extruder;
S5, setting the temperature of a discharging section of the extruder to 281-295 ℃, and extruding the mixed material through a die head of the extruder after passing through the discharging section of the extruder to obtain the homogeneous microporous fiber;
And S6, conveying the homogeneous microporous fiber into a stretcher for stretching to obtain the homogeneous microporous filament.
Example 2: the invention provides a preparation method of a homogeneous microporous material, which comprises the following preparation steps:
S1, taking polyether ester and polyacrylamide, wherein the melting point of the polyether ester is 200-230 ℃, and the addition amount of the polyacrylamide is 1.5% of the mass of the polyether ester;
S2, setting the temperature of a feeding section of the extruder to be 100-120 ℃, feeding polyether ester into a feeding port of the extruder, and feeding polyacrylamide into the extruder in a side feeding mode;
S3, setting the temperature of a melting section of the extruder to be 210-240 ℃, enabling polyether ester and polyacrylamide to enter the melting section of the extruder for melt blending to obtain a mixed material, and opening an ultrasonic transducer, wherein the ultrasonic transducer generates high-frequency mechanical oscillation on the mixed material;
S4, setting the temperature of a mixing section of the extruder to 241-280 ℃, and enabling the mixed material to enter the mixing section of the extruder;
S5, setting the temperature of a discharging section of the extruder to 281-295 ℃, and extruding the mixed material through a die head of the extruder after passing through the discharging section of the extruder to obtain the homogeneous microporous fiber;
And S6, conveying the homogeneous microporous fiber into a stretcher for stretching to obtain the homogeneous microporous filament.
Example 3: the invention provides a preparation method of a homogeneous microporous material, which comprises the following preparation steps:
s1, taking polyether ester and polyacrylamide, wherein the melting point of the polyether ester is 200-230 ℃, and the addition amount of the polyacrylamide is 3.0% of the mass of the polyether ester;
S2, setting the temperature of a feeding section of the extruder to be 100-120 ℃, feeding polyether ester into a feeding port of the extruder, and feeding polyacrylamide into the extruder in a side feeding mode;
S3, setting the temperature of a melting section of the extruder to be 210-240 ℃, enabling polyether ester and polyacrylamide to enter the melting section of the extruder for melt blending to obtain a mixed material, and opening an ultrasonic transducer, wherein the ultrasonic transducer generates high-frequency mechanical oscillation on the mixed material;
S4, setting the temperature of a mixing section of the extruder to 241-280 ℃, and enabling the mixed material to enter the mixing section of the extruder;
S5, setting the temperature of a discharging section of the extruder to 281-295 ℃, and extruding the mixed material through a die head of the extruder after passing through the discharging section of the extruder to obtain the homogeneous microporous fiber;
And S6, conveying the homogeneous microporous fiber into a stretcher for stretching to obtain the homogeneous microporous filament.
Example 4: the invention provides a preparation method of a homogeneous microporous material, which comprises the following preparation steps:
S1, taking polyether ester and polyacrylamide, wherein the melting point of the polyether ester is 220 ℃, and the addition amount of the polyacrylamide is 5.0% of the mass of the polyether ester;
S2, setting the temperature of a feeding section of the extruder to be 100-120 ℃, feeding polyether ester into a feeding port of the extruder, and feeding polyacrylamide into the extruder in a side feeding mode;
S3, setting the temperature of a melting section of the extruder to be 210-240 ℃, enabling polyether ester and polyacrylamide to enter the melting section of the extruder for melt blending to obtain a mixed material, and opening an ultrasonic transducer, wherein the ultrasonic transducer generates high-frequency mechanical oscillation on the mixed material;
S4, setting the temperature of a mixing section of the extruder to 241-280 ℃, and enabling the mixed material to enter the mixing section of the extruder;
S5, setting the temperature of a discharging section of the extruder to 281-295 ℃, and extruding the mixed material through a die head of the extruder after passing through the discharging section of the extruder to obtain the homogeneous microporous fiber;
And S6, conveying the homogeneous microporous fiber into a stretcher for stretching to obtain the homogeneous microporous filament.
In examples 1-4, the polyether ester consisted of polyether blocks and polyester blocks, the polyether blocks mass being 4% of the total mass of the polyether ester; the polyether block is polyethylene glycol with the number average molecular weight of 1000, and the polyester block is polyethylene terephthalate; the ultrasonic frequency emitted by the ultrasonic transducer is 50000Hz; the die head of the extruder was set to be a round orifice die, and the homogeneous microporous fiber obtained by extrusion was a 0.10mm filament. In a stretcher, the homogeneous microporous fiber can be subjected to a DTY process to obtain a printing DTY filament, or can be subjected to a drawing and FDY process to obtain a printing FDY filament, and the homogeneous microporous filaments obtained in examples 1-4 are all printing DTY filaments.
Example 5: the invention provides a preparation method of a homogeneous microporous material, which comprises the following preparation steps:
s1, taking polyether ester and polyacrylamide, wherein the melting point of the polyether ester is 200-230 ℃, and the addition amount of the polyacrylamide is 1.0% of the mass of the polyether ester;
S2, setting the temperature of a feeding section of the extruder to be 100-120 ℃, feeding polyether ester into a feeding port of the extruder, and feeding polyacrylamide into the extruder in a side feeding mode;
S3, setting the temperature of a melting section of the extruder to be 210-240 ℃, enabling polyether ester and polyacrylamide to enter the melting section of the extruder for melt blending to obtain a mixed material, and opening an ultrasonic transducer, wherein the ultrasonic transducer generates high-frequency mechanical oscillation on the mixed material;
S4, setting the temperature of a mixing section of the extruder to 241-280 ℃, and enabling the mixed material to enter the mixing section of the extruder;
s5, setting a flat die head of the extruder, setting the temperature of a discharging section of the extruder to 281-295 ℃, and extruding the mixed material through the die head of the extruder after passing through the discharging section of the extruder to obtain the homogeneous microporous film.
Example 6: the invention provides a preparation method of a homogeneous microporous material, which comprises the following preparation steps:
s1, taking polyether ester and polyacrylamide, wherein the melting point of the polyether ester is 200-230 ℃, and the addition amount of the polyacrylamide is 2.0% of the mass of the polyether ester;
S2, setting the temperature of a feeding section of the extruder to be 100-120 ℃, feeding polyether ester into a feeding port of the extruder, and feeding polyacrylamide into the extruder in a side feeding mode;
S3, setting the temperature of a melting section of the extruder to be 210-240 ℃, enabling polyether ester and polyacrylamide to enter the melting section of the extruder for melt blending to obtain a mixed material, and opening an ultrasonic transducer, wherein the ultrasonic transducer generates high-frequency mechanical oscillation on the mixed material;
S4, setting the temperature of a mixing section of the extruder to 241-280 ℃, and enabling the mixed material to enter the mixing section of the extruder;
s5, setting a flat die head of the extruder, setting the temperature of a discharging section of the extruder to 281-295 ℃, and extruding the mixed material through the die head of the extruder after passing through the discharging section of the extruder to obtain the homogeneous microporous film.
In examples 5 to 6, the polyether ester was composed of polyether blocks and polyester blocks, the polyether blocks accounting for 4% of the total mass of the polyether ester; the polyether block is polyethylene glycol with the number average molecular weight of 1000, and the polyester block is polyethylene terephthalate; the ultrasonic frequency emitted by the ultrasonic transducer is 60000Hz; and (3) transversely stretching and heat setting the homogeneous microporous film at 135 ℃ in sequence to obtain the printing film.
The invention also provides the following technical scheme: the application of the homogeneous microporous material adopts the preparation method of the homogeneous microporous material to obtain the printing DTY filament, the printing FDY filament or the printing film, and the printing DTY filament, the printing FDY filament and the printing film are all used as printing materials.
The extruder can be replaced by a spinning machine, the spinning machine adopts five heating areas, and the temperatures of the five heating areas are respectively set as follows: the feed inlet heating section is 100-120 ℃, the feed zone heating section is 121-209 ℃, the screw zone heating section is 210-240 ℃, the barrel zone heating section is 241-280 ℃, and the die head heating section is 281-295 ℃. And feeding polyether ester into a feed inlet of a spinning machine, feeding polyacrylamide into the spinning machine in a side feeding mode, and enabling the mixed material to pass through a spinneret plate of the spinning machine to obtain short fibers, filaments or films.
According to the invention, polyether ester and polyacrylamide are designed to be melt-blended at 210-240 ℃, preliminary pyrolysis is carried out on the polyacrylamide, amide groups of the polyacrylamide are decomposed to generate ammonia gas and water vapor, ultrasonic waves are started at the moment, the gas is used as micro-gas nuclear cavitation bubbles, the generated cavitation effect enables the incompletely pyrolyzed polyacrylamide to be uniformly distributed in the polyether ester, then the heating is continued to 281-295 ℃, the polyacrylamide is completely pyrolyzed to generate bubbles, the bubbles generated by the complete pyrolysis of the incompletely pyrolyzed polyacrylamide can be uniformly distributed, and along with the collapse of the bubbles, the outer surface of the fiber or film forms a uniform open pore structure, and the interior of the fiber or film forms a uniform nano-level and communicated honeycomb structure.
The outer surfaces of the homogeneous microporous fiber and the homogeneous microporous film are provided with nanometer micro holes, the inside is provided with a nanometer honeycomb structure which is communicated, and after suspended particle ink which is digitally printed or printed enters the surface of the homogeneous microporous fiber or the homogeneous microporous film, the ink can quickly and vertically enter the inside of the material, so that transverse permeation and diffusion can not occur, and a pattern with a clear boundary is formed. The ink can form tight combination with the homogeneous microporous fiber and the homogeneous microporous film, and has excellent ink layer combination fastness.
Test example 1:
The test contents are as follows: the average breaking strength and average elongation at break of the homogeneous microporous fibers prepared in examples 1 to 4 were measured according to the measurement method disclosed in GB/T9997-1988 measurement of chemical fiber breaking strength and elongation at break, using a 0.10mm PET filament produced by Nantong Xin Dike as a control group, and the results are shown in Table 1.
TABLE 1
| Average breaking Strength (cN/dtex) | Average elongation at break (%) | |
| Example 1 | 3.1 | 38 |
| Example 2 | 3.0 | 40 |
| Example 3 | 2.8 | 45 |
| Example 4 | 2.4 | 53 |
| Control group | 4.0 | 29 |
As is clear from Table 1, the average breaking strength and average elongation at break of the homogeneous microporous fibers prepared in examples 1 to 4 decrease with increasing polyacrylamide content, which is due to the fact that the larger the polyacrylamide content, the larger the number of micropores of the homogeneous microporous fibers prepared in examples 1 to 4, resulting in a decrease in the average breaking strength and average elongation at break.
Test example 2:
The test contents are as follows: the homogeneous microporous films prepared in example 5 and example 6 were subjected to transverse stretching and heat setting at 135 ℃ in order to obtain a printing film, and the ink layer binding fastness of the printing film was measured according to the method for detecting ink layer binding fastness disclosed in GB/T7707-2008 gravure decorative printed matter, and the results are shown in Table 2.
TABLE 2
| Ink layer binding fastness (%) | |
| Example 5 | 98.27 |
| Example 6 | 98.30 |
The printing films obtained by the preparation steps of the examples 5 and 6 have excellent ink layer bonding fastness, and the digital printing is performed on the printing films, so that the printing effect is shown as clear and complete image and text, clean layout and no obvious stripes or bands.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A method for preparing a homogeneous microporous material, comprising the steps of:
s1, taking polyether ester and polyacrylamide, wherein the melting point of the polyether ester is 200-230 ℃, and the addition amount of the polyacrylamide is 0.1% -5.0% of the mass of the polyether ester;
S2, setting the temperature of a feeding section of the extruder to be 100-120 ℃, feeding polyether ester into a feeding port of the extruder, and feeding polyacrylamide into the extruder in a side feeding mode;
S3, setting the temperature of a melting section of the extruder to be 210-240 ℃, enabling polyether ester and polyacrylamide to enter the melting section of the extruder for melt blending to obtain a mixed material, and opening an ultrasonic transducer, wherein the ultrasonic transducer generates high-frequency mechanical oscillation on the mixed material;
S4, setting the temperature of a mixing section of the extruder to 241-280 ℃, and enabling the mixed material to enter the mixing section of the extruder;
S5, setting the temperature of a discharging section of the extruder to 281-295 ℃, and extruding the mixed material through a die head of the extruder after passing through the discharging section of the extruder to obtain the homogeneous microporous fiber;
And S6, conveying the homogeneous microporous fiber into a stretcher for stretching to obtain the homogeneous microporous filament.
2. The method for preparing a homogeneous microporous material according to claim 1, wherein the polyether ester is composed of polyether blocks and polyester blocks, and the mass of the polyether blocks is 4% of the total mass of the polyether ester; the polyether block is polyethylene glycol with the number average molecular weight of 1000, and the polyester block is polyethylene terephthalate.
3. The method of claim 1, wherein the ultrasonic frequency of the ultrasonic transducer is 10000-60000 Hz.
4. Use of a homogeneous microporous material produced by a process according to any one of claims 1 to 3, as a printing material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410337946.0A CN117926435B (en) | 2024-03-25 | 2024-03-25 | Preparation method and application of homogeneous microporous material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410337946.0A CN117926435B (en) | 2024-03-25 | 2024-03-25 | Preparation method and application of homogeneous microporous material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117926435A true CN117926435A (en) | 2024-04-26 |
| CN117926435B CN117926435B (en) | 2024-06-18 |
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| CN202410337946.0A Active CN117926435B (en) | 2024-03-25 | 2024-03-25 | Preparation method and application of homogeneous microporous material |
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|---|---|
| CN117926435B (en) | 2024-06-18 |
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