CN114753022A - Self-repairing waterproof polylactic acid fiber fabric with core-shell structure - Google Patents
Self-repairing waterproof polylactic acid fiber fabric with core-shell structure Download PDFInfo
- Publication number
- CN114753022A CN114753022A CN202210291500.XA CN202210291500A CN114753022A CN 114753022 A CN114753022 A CN 114753022A CN 202210291500 A CN202210291500 A CN 202210291500A CN 114753022 A CN114753022 A CN 114753022A
- Authority
- CN
- China
- Prior art keywords
- polylactic acid
- core
- self
- acid fiber
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
-
- 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
-
- 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
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
- D01D5/34—Core-skin structure; Spinnerette packs therefor
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
- D03D15/283—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads synthetic polymer-based, e.g. polyamide or polyester fibres
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
- D03D15/527—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads waterproof or water-repellent
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
- D10B2331/041—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET] derived from hydroxy-carboxylic acids, e.g. lactones
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Woven Fabrics (AREA)
Abstract
The invention discloses a self-repairing waterproof polylactic acid fiber fabric with a core-shell structure, which is formed by interweaving polylactic acid fibers; the polylactic acid fiber has a core-shell structure and specifically comprises a core layer, a middle layer and a shell layer, wherein the core layer is polylactic acid and provides basic mechanical strength for the fiber and the fabric; the middle layer is composed of polylactic acid containing nano particles, and the nano particles contain low-surface-energy micromolecule compounds to provide hydrophobicity for fibers and fabrics; the shell layer is made of polylactic acid, has an open pore structure, provides a migration channel of a low surface energy compound, and plays a role in self-repairing hydrophobic performance. The invention overcomes the problem that the water resistance of the traditional polylactic acid fiber fabric is lost in the using process, and solves the daily life needs.
Description
Technical Field
The invention belongs to the field of textile fibers, and particularly relates to a self-repairing waterproof polylactic acid fiber fabric with a core-shell structure.
Background
With the full attention paid to the environmental problems, people can deeply understand the concept of sustainable development, and fiber products with better environmental protection property are favored by the masses, and polylactic acid fiber is a typical representative of the fiber products. The polylactic acid fiber is prepared by using agricultural products containing starch, such as corn, wheat, beet and the like, as raw materials, fermenting the raw materials to generate lactic acid, and then performing polycondensation and melt spinning. The polylactic acid fiber is a synthetic fiber which can be planted as a raw material and is easy to plant, and wastes can be naturally degraded in nature. It can be decomposed into carbon dioxide and water by the action of microbes in soil or seawater, and when it is burnt, it does not emit toxic gas and cause pollution, so that it is a sustainable ecological fibre. The fabric has excellent biodegradability, good strength and rebound resilience, is very suitable for the production of green environment-friendly textiles, has better comprehensive performance for polylactic acid fiber fabrics or fabrics with higher polylactic acid fiber content, has the advantages of good fabric hand feeling and drapability, ultraviolet resistance, skin refreshing and air permeability, has lower flammability and excellent processability, and is very suitable for the development of summer clothing fabrics.
However, the waterproof property of the polylactic acid fiber fabric is lost during the use process, and in order to solve the problem, the invention provides a self-repairing waterproof polylactic acid fiber fabric with a core-shell structure.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a self-repairing waterproof polylactic acid fiber fabric with a core-shell structure, so that the self-repairing waterproof polylactic acid fiber fabric has excellent waterproof effect, and the problem of water resistance loss of polylactic acid fibers in the background art is solved.
The invention relates to a self-repairing waterproof polylactic acid fiber fabric with a core-shell structure, which is formed by interweaving polylactic acid fibers, wherein the polylactic acid fibers have the core-shell structure and specifically comprise a core layer, an intermediate layer and a shell layer.
The polylactic acid fiber comprises: the core layer is common polylactic acid, and provides basic mechanical strength for the fiber and the fabric; the middle layer is composed of polylactic acid containing nano particles, and the nano particles contain low-surface-energy small-molecule compounds to provide hydrophobicity for fibers and fabrics; the shell layer is made of polylactic acid, has an open pore structure, provides a migration channel of a low surface energy compound, and plays a role in self-repairing hydrophobic property.
Further, the mass ratio of polylactic acid in the middle core layer, the middle layer and the shell layer of the polylactic acid fiber is 5:3: 2. The diameter of the polylactic acid fiber is 30-120 μm.
In the middle layer of the polylactic acid fiber, the mass ratio of the nanoparticles to the polylactic acid is 1: 10-1: 20. The nano particles are selected from nano-scale materials such as mesoporous silicon dioxide, mesoporous titanium dioxide, metal organic frameworks and the like. The low-surface-energy micromolecule compound is selected from fluorine-containing compounds such as 8-18-carbon perfluorinated trimethoxy silane, perfluorinated organic acid and perfluorinated organic amine, or fluorine-free compounds such as methyl silicone oil, paraffin, stearic acid and 10-18-carbon organic amine. The mass ratio of the low-surface-energy micromolecule compound to the nanoparticles is 1: 10-1: 20.
In the shell layer of the polylactic acid fiber, the polylactic acid has an open pore structure formed by dispersing water-soluble inorganic salt particles in the shell layer of the polylactic acid fiber and then washing the shell layer with water. The mass ratio of the water-soluble inorganic salt particles to the shell layer polylactic acid is 1: 10-1: 20. The water-soluble inorganic salt particles are sodium chloride, calcium chloride or magnesium chloride and the like.
The self-repairing waterproof polylactic acid fiber fabric with the core-shell structure can accelerate the migration speed of low-surface-energy micromolecule compounds by controlling the temperature, thereby achieving the aim of quickly repairing the hydrophobic property.
The preparation process of the self-repairing waterproof polylactic acid fiber fabric with the core-shell structure comprises the following steps:
firstly, putting a common polylactic acid material into an extruder for melt blending, extruding and granulating, and taking the prepared granules as fiber core material raw materials for later use, wherein the mass ratio of polylactic acid in a fiber core layer 1, a middle layer 3 and a shell layer 4 is 5:3: 2;
secondly, adding a low surface energy micromolecule compound into 98% ethanol water, adjusting the pH value to 3.5 by using acetic acid, stirring for 36 hours, preparing nanoparticle powder ethanol solution, mixing the hydrolyzed low surface energy micromolecule compound solution with the hydrolyzed low surface energy micromolecule compound solution according to the volume ratio of 4:1, stirring for 10 hours, drying for 8 hours in a vacuum drying oven at 100 ℃ after centrifugal separation, and obtaining the surface modified nanoparticles. Uniformly dispersing the prepared surface-modified nanoparticles in a polylactic acid matrix under ultrasonic stirring and mechanical stirring to a certain extent, putting the prepared material in an extruder for melt blending, extruding and granulating, and taking the prepared granules as an intermediate layer material for later use, wherein the mass ratio of the nanoparticles to the intermediate layer polylactic acid is 1: 10-1: 20, and the mass ratio of the low-surface-energy micromolecule compound to the nanoparticles is 1: 10-1: 20.
Thirdly, placing the pore-foaming agent (namely water-soluble inorganic salt particles) and the polylactic acid in a drying oven at 50 ℃ for drying for 10 hours, then ball-milling the dried pore-foaming agent for 5 hours, screening particles with the particle size of below 60 mu m by a 200mesh standard sieve, uniformly mixing the pore-foaming agent and the polylactic acid according to the mass ratio of 1: 10-1: 20, premixing by a blender, placing in a continuous mixing mill for mixing and melting, setting the rotating speed at 500r/min, and setting the temperature at 120 ℃; soaking the prepared mixture in distilled water for 48h, changing water every 10h to fully dissolve the pore-forming agent, taking out a sample, and drying the sample in a drying oven at the temperature of 45 ℃ at low temperature to obtain the porous material serving as a shell material for later use.
And fourthly, putting the core layer material prepared in the step I, the middle layer material prepared in the step II and the shell layer material prepared in the step III into a coaxial melt spinning device, wherein the mass ratio of the core layer to the middle layer to the shell layer is 1:1: 1-1: 3:5, and then carrying out coaxial melt spinning, wherein the spinning voltage is set to be 18kV, the spinning distance is 5cm, and the fiber diameter is 30-120 mu m. The prepared polylactic acid fiber is interwoven to form a fabric, so that the self-repairing polylactic acid fiber fabric with good durability is successfully prepared.
The self-repairing waterproof polylactic acid fiber fabric with the core-shell structure has the advantages that:
1. the waterproof polylactic acid fiber adopts environment-friendly raw materials which are easy to obtain and do no harm to human bodies, and the functional fiber with the waterproof property can be biodegraded or recycled after being used, so that the whole process of production, use and recycling is green and environment-friendly;
2. the fiber core material adopts the hydrophobic compound, has excellent waterproof effect compared with the common polylactic acid fiber, and overcomes the problem that the conventional polylactic acid fiber does not have waterproof property;
3. the waterproof polylactic acid fiber also has a certain spontaneous repair function. The low surface energy micromolecule compound can migrate to the damaged surface at a certain temperature, so that the value of the functional polylactic acid fiber, namely the stability and the service life of the material are further improved, the self-repairing performance is introduced into the super-hydrophobic material, and the super-hydrophobic material has a better application prospect.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings will be briefly described below.
FIG. 1 is a schematic structural diagram of a self-repairing waterproof polylactic acid fiber fabric with a core-shell structure. Wherein, 1 polylactic acid core layer, 2 nano particles, low surface energy micromolecule substances, 3 middle layers, 4 outer layers and 5 pore-foaming agents/micropores.
Detailed Description
In order to make the technical solutions and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions of the present invention with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. Based on the described embodiments of the present invention, other embodiments obtained by persons of ordinary skill in the art without creating any work are within the scope of the present invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "including" or "comprising" and the like in this disclosure is meant to indicate that the material preceding the word encompasses the material listed after the word and equivalents thereof.
The invention will be further explained with reference to the drawings and examples.
The embodiment of the invention provides a self-repairing waterproof polylactic acid fiber fabric with a core-shell structure, which is a fiber fabric taking polylactic acid bio-based macromolecules as a base material. The related fabric is formed by interweaving polylactic acid fibers; the cross section of the polylactic acid fiber is of a core-shell structure, and the fiber comprises a core layer 1, a middle layer 3 and a shell layer 4; the core layer 1 is made of common polylactic acid and provides basic mechanical strength for fibers and fabrics; the middle layer 3 is composed of polylactic acid containing nano particles 2, and the nano particles 2 contain low surface energy micromolecule compounds to provide hydrophobicity for fibers and fabrics; the shell layer 4 is made of polylactic acid, has an open pore structure, provides a migration channel of a low surface energy compound, and plays a role in self-repairing hydrophobic performance.
The nanoparticles 2 in the intermediate layer can be mesoporous silica, mesoporous titania, metal organic framework, and other nanoscale materials. The mass ratio of the nano particles to the middle layer polylactic acid is 1: 10-1: 20. The above nanoparticles 2 are not limited to the above listed species, and are specifically selected according to actual needs.
The low surface energy micromolecule compound in the nano-particle 2 can be selected from fluorine-containing compounds such as 8-18 carbon perfluorinated trimethoxy silane, perfluorinated organic acid, perfluorinated organic amine and the like or fluorine-free compounds such as methyl silicone oil, paraffin, stearic acid, 10-18 carbon organic amine and the like. The mass ratio of the low-surface-energy micromolecule compound to the nanoparticles is 1: 10-1: 20. The above low surface energy small molecule compound is not limited to the above list, and is not particularly limited as long as it can exhibit hydrophobic properties.
The pore-forming agent 5 can be selected from water-soluble inorganic salt particles such as sodium chloride, calcium chloride or magnesium chloride. The mass ratio of the water-soluble inorganic salt particles to the shell layer polylactic acid is 1: 10-1: 20. The pore-forming agent 5 is not limited to the above-mentioned species, and is specifically selected according to actual needs.
The preparation process of the self-repairing waterproof polylactic acid fiber fabric with the core-shell structure comprises the following steps:
firstly, taking a common polylactic acid material, putting the common polylactic acid material into an extruder, carrying out melt blending, extruding and granulating to obtain granules serving as fiber core material raw materials for later use, wherein the mass ratio of polylactic acid in a fiber core layer 1, a middle layer 3 and a shell layer 4 is 5:3: 2;
secondly, adding a low surface energy micromolecule compound into 98% ethanol water, adjusting the pH value to 3.5 by using acetic acid, stirring for 36 hours, preparing nanoparticle powder ethanol solution, mixing the hydrolyzed low surface energy micromolecule compound solution with the hydrolyzed low surface energy micromolecule compound solution according to the volume ratio of 4:1, stirring for 10 hours, drying for 8 hours in a vacuum drying oven at 100 ℃ after centrifugal separation, and obtaining the surface modified nanoparticles. Uniformly dispersing the prepared surface-modified nanoparticles in a polylactic acid matrix under ultrasonic stirring and mechanical stirring to a certain extent, putting the prepared material in an extruder for melt blending, extruding and granulating, and taking the prepared granules as an intermediate layer material for later use, wherein the mass ratio of the nanoparticles to the intermediate layer polylactic acid is 1: 10-1: 20, and the mass ratio of the low-surface-energy micromolecule compound to the nanoparticles is 1: 10-1: 20.
Thirdly, placing the pore-foaming agent and the polylactic acid in a drying oven at 50 ℃ for drying for 10 hours, then ball-milling the dried pore-foaming agent for 5 hours, screening particles with the particle size range of below 60 micrometers through a 200mesh standard sieve, uniformly mixing the pore-foaming agent and the polylactic acid according to the mass ratio of 1: 10-1: 20, premixing through a mixer, and then placing in a continuous mixer for mixing and melting, wherein the rotating speed is set to be 500r/min, and the temperature is set to be 120 ℃; and soaking the prepared mixture in distilled water for 48 hours, changing water every 10 hours to fully dissolve the pore-forming agent, taking out a sample, and drying the sample in a drying box at the temperature of 45 ℃ at low temperature to obtain the porous material serving as a shell material for later use.
And fourthly, putting the core layer material prepared in the step I, the middle layer material prepared in the step II and the shell layer material prepared in the step III into a coaxial melt spinning device, wherein the mass ratio of the core layer to the middle layer to the shell layer is 1:1: 1-1: 3:5, and then carrying out coaxial melt spinning, wherein the spinning voltage is set to be 18kV, the spinning distance is 5cm, and the fiber diameter is 30-120 mu m. The prepared polylactic acid fiber is interwoven to form a fabric, so that the self-repairing polylactic acid fiber fabric with good durability is successfully prepared.
The composition, preparation and other aspects of the self-repairing waterproof polylactic acid fiber fabric with the core-shell structure are described by specific examples below. In parts by mass.
Example 1:
taking 100 parts of common polylactic acid, putting the common polylactic acid into an extruder for melt blending, extruding and granulating, and taking the prepared granules as the raw material of the fiber core material for later use.
Adding 0.5 part of perfluorooctyl trimethoxysilane into 98% ethanol water, adjusting the pH value to 3.5 by using acetic acid, stirring for 36h, preparing 5 parts of mesoporous silica nanoparticle powder ethanol solution, mixing the hydrolyzed perfluorooctyl trimethoxysilane solution with the hydrolyzed perfluorooctyl trimethoxysilane solution according to the volume ratio of 4:1, stirring for 10h, centrifugally separating, and drying at 100 ℃ for 8h in a vacuum drying oven to obtain the surface-modified nanoparticles. The prepared nanoparticle 2 containing perfluorooctyltrimethoxysilane is uniformly dispersed in 60 parts of polylactic acid matrix by adopting ultrasonic stirring and assisting mechanical stirring to a certain degree, the prepared material is placed in an extruder for melt blending, and then extrusion and granulation are carried out, and the prepared granules are used as interlayer materials for later use.
2 parts of sodium chloride particles and 40 parts of polylactic acid are placed in a drying oven at 50 ℃ for drying for 10 hours, the dried sodium chloride particles are ball-milled for 5 hours, particles with the particle size range below 60 mu m are screened by a 200mesh standard sieve, the sodium chloride particles and the polylactic acid are uniformly mixed, premixed by a mixer, placed in a continuous mixing roll for mixing and melting, the rotating speed is set to be 500r/min, and the temperature is set to be 120 ℃. And soaking the prepared mixture in distilled water for 48h, changing water every 10h to fully dissolve sodium chloride particles, taking out a sample, and drying the sample in a drying box at the temperature of 45 ℃ at low temperature to obtain a porous material serving as a shell material for later use.
Respectively adding 100g of core material raw material, 200g of middle layer raw material and 300g of shell layer raw material into equipment, namely adding the core layer, the middle layer and the shell layer into the equipment according to the mass ratio of 1:2:3, setting the spinning voltage to be 18kV and the spinning distance to be 5cm, and preparing polylactic acid fiber with a core-shell structure by a coaxial melt spinning method, wherein the fiber diameter is 60 mu m; the prepared polylactic acid fibers are interwoven to form a fabric.
And (3) testing results: the water contact angle of the fabric was tested at 25 deg.C and found to be 155.3 deg., which reached a superhydrophobic rating.
Example 2:
the perfluorooctyltrimethoxysilane in example 1 was replaced with a silicone oil. The other components and the dosage as well as the experimental operation steps and conditions are not changed. The prepared polylactic acid fibers are interwoven to form a fabric.
And (3) testing results: the fabric was tested for water contact angle at 25 deg.c to 159.6 deg., which reached a superhydrophobic rating.
Example 3:
the amount of mesoporous silica nanoparticles used in example 1 was reduced to 50%. Namely, the amount of the mesoporous silica nanoparticles was 2.5 parts. The other components and the dosage as well as the experimental operation steps and conditions are not changed. The prepared polylactic acid fiber is interwoven to form a fabric.
And (3) testing results: the fabric was tested for water contact angle at 25 ℃ and found to be 152.5 ° super hydrophobic grade. But the water-repellent performance was slightly inferior to that of example 1.
Example 4:
the amount of sodium chloride granules in example 1 was enlarged to 50% of the original amount. I.e. the amount of sodium chloride granules is 3 parts. The other components and the dosage as well as the experimental operation and the conditions are not changed. The prepared polylactic acid fibers are interwoven to form a fabric.
And (3) testing results: the fabric was tested for water contact angle at 25 ℃ and found to be 157.2 ° super hydrophobic grade.
Example 5:
the fiber fabric prepared in example 1 was repeatedly rubbed 200 times under a pressure of 0.5MPa, and then tested again after heating the rubbed fabric at 80 ℃ for 30 minutes.
And (3) testing results: testing for the first time: the water contact angle of the fabric is tested at 25 ℃, and the result is 145.6 degrees and the super-hydrophobic grade is not reached; secondly, testing for the second time: the water contact angle of the fabric was tested at 25 ℃ and found to be 151.8 ° to achieve a superhydrophobic rating. The results of two tests show that the polylactic acid fiber fabric has a certain spontaneous repair function.
Comparative example 1:
common polylactic acid is used as a material to prepare the full-core common polylactic acid fiber. The prepared polylactic acid fiber is interwoven to form a fabric. A comparative polylactic acid fiber fabric was obtained in the same amount as in example 1.
And (3) testing results: the fabric was tested for water contact angle at 25 ℃ and found 46 ° without reaching a superhydrophobic rating.
Comparative example 2:
in example 1, the mass ratio of polylactic acid in the fiber core layer, the middle layer and the shell layer is reset to 4-6: 3:2, that is, the content of polylactic acid in the core layer is 80-120 parts, the content of polylactic acid in the middle layer is 60 parts, and the content of polylactic acid in the shell layer is 40 parts. The other components and the dosage as well as the experimental operation and the conditions are not changed. The prepared polylactic acid fibers are interwoven to form a fabric.
And (3) testing results: the water contact angle of the fabric is tested at 25 ℃, and multiple test results show that when the mass ratio of the polylactic acid in the fiber core layer, the middle layer and the shell layer is set to be 5:3:2, the waterproof effect is good.
By comparing the test results of example 1 and comparative example 1, it can be known that the prepared self-repairing waterproof polylactic acid fiber fabric with a core-shell structure has waterproofness. According to the test result of the example 4, the polylactic acid fiber has certain spontaneous repair function at certain temperature.
According to the structure in the figure, the self-repairing waterproof polylactic acid fiber fabric with the core-shell structure comprises a core layer, an intermediate layer and a shell layer; the core layer is made of common polylactic acid and provides basic mechanical strength for the fiber and the fabric; the middle layer is composed of polylactic acid containing nano particles, and the nano particles contain low-surface-energy small-molecule compounds to provide hydrophobicity for fibers and fabrics; the shell layer is made of polylactic acid, has an open pore structure, provides a migration channel of a low surface energy compound, and plays a role in self-repairing hydrophobic property. The prepared polylactic acid fiber is interwoven to form a fabric. The prepared polylactic acid fiber fabric has excellent waterproof effect and has the function of spontaneously repairing waterproof performance.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The self-repairing waterproof polylactic acid fiber fabric with the core-shell structure is characterized in that:
the self-repairing waterproof polylactic acid fiber fabric with the core-shell structure is formed by interweaving polylactic acid fibers; the polylactic acid fiber has a core-shell structure, and particularly comprises a core layer, a middle layer and a shell layer, wherein the core layer is polylactic acid and provides basic mechanical strength for the fiber and the fabric; the middle layer is composed of polylactic acid containing nano particles, and the nano particles contain low-surface-energy small-molecule compounds to provide hydrophobicity for fibers and fabrics; the shell layer is made of polylactic acid, has an open pore structure, provides a migration channel of a low surface energy compound, and plays a role in self-repairing hydrophobic property.
2. The self-healing waterproof polylactic acid fiber fabric with a core-shell structure according to claim 1, wherein:
the mass ratio of polylactic acid in the middle core layer, the middle layer and the shell layer of the polylactic acid fiber is 5:3: 2.
3. The self-healing waterproof polylactic acid fiber fabric with a core-shell structure according to claim 1, wherein:
in the middle layer of the polylactic acid fiber, the mass ratio of the nanoparticles to the polylactic acid is 1: 10-1: 20.
4. The self-repairing waterproof polylactic acid fiber fabric with the core-shell structure as claimed in claim 1, wherein:
the nano particles are selected from mesoporous silicon dioxide, mesoporous titanium dioxide and metal organic framework nano materials;
the low-surface-energy micromolecule compound is selected from fluorine-containing compounds such as 8-18-carbon perfluorinated trimethoxy silane, perfluorinated organic acid and perfluorinated organic amine, or fluorine-free compounds such as methyl silicone oil, paraffin, stearic acid and 10-18-carbon organic amine.
5. The self-repairing waterproof polylactic acid fiber fabric with the core-shell structure, according to claim 4, is characterized in that:
the mass ratio of the low-surface-energy micromolecule compound to the nanoparticles is 1: 10-1: 20.
6. The self-repairing waterproof polylactic acid fiber fabric with the core-shell structure as claimed in claim 1, wherein:
in the shell layer of the polylactic acid fiber, the porous structure of the polylactic acid is formed by dispersing water-soluble inorganic salt particles in the shell layer of the polylactic acid fiber and then performing a water washing step.
7. The self-repairing waterproof polylactic acid fiber fabric with the core-shell structure as claimed in claim 6, wherein:
the water-soluble inorganic salt particles are sodium chloride, calcium chloride or magnesium chloride.
8. The self-repairing waterproof polylactic acid fiber fabric with the core-shell structure as claimed in claim 7, wherein:
the mass ratio of the water-soluble inorganic salt particles to the shell layer polylactic acid is 1: 10-1: 20.
9. The self-repairing waterproof polylactic acid fiber fabric with the core-shell structure as claimed in claim 1, wherein:
the diameter of the polylactic acid fiber is 30-120 mu m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210291500.XA CN114753022B (en) | 2022-03-23 | 2022-03-23 | Self-repairing waterproof polylactic acid fiber fabric with core-shell structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210291500.XA CN114753022B (en) | 2022-03-23 | 2022-03-23 | Self-repairing waterproof polylactic acid fiber fabric with core-shell structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114753022A true CN114753022A (en) | 2022-07-15 |
| CN114753022B CN114753022B (en) | 2023-06-27 |
Family
ID=82327971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210291500.XA Active CN114753022B (en) | 2022-03-23 | 2022-03-23 | Self-repairing waterproof polylactic acid fiber fabric with core-shell structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114753022B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1958081A (en) * | 2006-10-23 | 2007-05-09 | 天津大学 | Method for preparing 3D porous bracket of chitosan - copolymer of poly lactic acid |
| US20100297906A1 (en) * | 2009-05-21 | 2010-11-25 | University Of Cincinnati | Methods for electrospinning hydrophobic coaxial fibers into superhydrophobic and oleophobic coaxial fiber mats |
| WO2013123137A1 (en) * | 2012-02-16 | 2013-08-22 | Cornell University | Ordered porous nanofibers, methods, and applications |
| CN103449736A (en) * | 2012-05-28 | 2013-12-18 | 中国科学院兰州化学物理研究所 | Preparation method of self-repair super-hydrophobic polyurethane coating |
| CN105038439A (en) * | 2015-08-18 | 2015-11-11 | 东北石油大学 | Superhydrophobic composite coating with self-repair function and preparation method thereof |
| CN105641744A (en) * | 2016-02-27 | 2016-06-08 | 青岛大学 | Nano-micro multi-scale chitosan and polylactic acid composite scaffold and preparation method thereof |
| CN105770978A (en) * | 2016-03-21 | 2016-07-20 | 江苏广达医材集团有限公司 | Biodegradable medical abdominal surgical suture material |
| CN108745428A (en) * | 2018-06-05 | 2018-11-06 | 合肥工业大学 | A kind of multichannel three-dimensional microflow control paper chip and preparation method thereof |
| EP3403806A1 (en) * | 2017-05-18 | 2018-11-21 | Ecole Polytechnique Federale De Lausanne (Epfl) | Hierarchical porous structure |
| CN112315660A (en) * | 2020-12-23 | 2021-02-05 | 广州牧蓝春生物科技有限公司 | Biodegradable nanofiber medical bandage and preparation method thereof |
| CN113450945A (en) * | 2021-07-20 | 2021-09-28 | 重庆大学 | Self-repairing anti-icing aluminum stranded wire with composite hole and preparation method thereof |
| CN114032627A (en) * | 2021-12-16 | 2022-02-11 | 李永梅 | Negative ion moisture absorption health care functional fiber with skin-core structure and preparation method thereof |
| CN114086304A (en) * | 2021-11-29 | 2022-02-25 | 香港纺织及成衣研发中心有限公司 | Moisture-absorbing and sweat-releasing polylactic acid multilayer knitted fabric and preparation method thereof |
-
2022
- 2022-03-23 CN CN202210291500.XA patent/CN114753022B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1958081A (en) * | 2006-10-23 | 2007-05-09 | 天津大学 | Method for preparing 3D porous bracket of chitosan - copolymer of poly lactic acid |
| US20100297906A1 (en) * | 2009-05-21 | 2010-11-25 | University Of Cincinnati | Methods for electrospinning hydrophobic coaxial fibers into superhydrophobic and oleophobic coaxial fiber mats |
| WO2013123137A1 (en) * | 2012-02-16 | 2013-08-22 | Cornell University | Ordered porous nanofibers, methods, and applications |
| CN103449736A (en) * | 2012-05-28 | 2013-12-18 | 中国科学院兰州化学物理研究所 | Preparation method of self-repair super-hydrophobic polyurethane coating |
| CN105038439A (en) * | 2015-08-18 | 2015-11-11 | 东北石油大学 | Superhydrophobic composite coating with self-repair function and preparation method thereof |
| CN105641744A (en) * | 2016-02-27 | 2016-06-08 | 青岛大学 | Nano-micro multi-scale chitosan and polylactic acid composite scaffold and preparation method thereof |
| CN105770978A (en) * | 2016-03-21 | 2016-07-20 | 江苏广达医材集团有限公司 | Biodegradable medical abdominal surgical suture material |
| EP3403806A1 (en) * | 2017-05-18 | 2018-11-21 | Ecole Polytechnique Federale De Lausanne (Epfl) | Hierarchical porous structure |
| CN108745428A (en) * | 2018-06-05 | 2018-11-06 | 合肥工业大学 | A kind of multichannel three-dimensional microflow control paper chip and preparation method thereof |
| CN112315660A (en) * | 2020-12-23 | 2021-02-05 | 广州牧蓝春生物科技有限公司 | Biodegradable nanofiber medical bandage and preparation method thereof |
| CN113450945A (en) * | 2021-07-20 | 2021-09-28 | 重庆大学 | Self-repairing anti-icing aluminum stranded wire with composite hole and preparation method thereof |
| CN114086304A (en) * | 2021-11-29 | 2022-02-25 | 香港纺织及成衣研发中心有限公司 | Moisture-absorbing and sweat-releasing polylactic acid multilayer knitted fabric and preparation method thereof |
| CN114032627A (en) * | 2021-12-16 | 2022-02-11 | 李永梅 | Negative ion moisture absorption health care functional fiber with skin-core structure and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 刘延波;孙健;赵雪菲;马素梅;: "静电纺纤维在生物医药应用领域的研究进展", 产业用纺织品, no. 09, pages 1 - 11 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114753022B (en) | 2023-06-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106009056B (en) | A kind of polymer nanofiber-based aerogel material and preparation method thereof | |
| Yousef et al. | A new strategy for functionalization of char derived from pyrolysis of textile waste and its application as hybrid fillers (CNTs/char and graphene/char) in cement industry | |
| CN105862256B (en) | The method that polyfluortetraethylenanofibre nanofibre perforated membrane is prepared by PEO templates sacrifice method | |
| CN102093765B (en) | Powder coating and preparation method thereof | |
| CN110981339B (en) | Antibacterial soft porcelain decorative material and preparation method thereof | |
| CN105951210B (en) | A kind of beading fibrous material of bead pattern and preparation method thereof | |
| CN104845301A (en) | Ultraviolet screening agent, preparation method thereof, polylactic acid film containing ultraviolet screening agent and preparation method of polylactic acid film | |
| CN106179244A (en) | A kind of cellulose base is composite porous and its production and use | |
| CN108690223A (en) | A kind of layered double hydroxide/fibrination hole composite material and preparation method thereof | |
| CN103173892A (en) | Preparation method of nano bamboo fiber composite material | |
| Yang et al. | Preparation and characterization of novel super-artificial hair fiber based on biomass materials | |
| CN107012532B (en) | A kind of preparation method of mosquito repellent spandex | |
| CN114753022A (en) | Self-repairing waterproof polylactic acid fiber fabric with core-shell structure | |
| CN109208111A (en) | A kind of polyvinyl alcohol melt spinning fire resistance fibre and preparation method thereof | |
| CN108929446A (en) | Graphene composite master batch, modified fibre, superfiber leather and preparation method thereof purposes | |
| CN113736355B (en) | Preparation method of hydrolysis-resistant flame-retardant breathable moisture-permeable polyurethane porous coating | |
| TWI647082B (en) | Manufacturing method of copper antibacterial masterbatches | |
| CN110964298A (en) | Biodegradable modified material and preparation method thereof | |
| CN108976549A (en) | A kind of degradable PE composition and preparation method thereof | |
| CN104927094A (en) | High-starch-content polyvinyl alcohol-blended full-degradable plastic film and preparation method thereof | |
| CN112626862B (en) | High-strength yarn and preparation method thereof | |
| CN111286806B (en) | Anion health-care functional fiber and preparation method thereof | |
| CN203821759U (en) | Indoor flame-retardant environment-friendly decoration wall material | |
| CN105862518A (en) | Permanently antibacterial negative-ion melt-blown non-woven fabric wallpaper base paper and making method thereof | |
| CN110607574A (en) | PPS fiber with high color fastness and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |