CN111850734B - Raschel tapestry capable of purifying indoor air under drive of visible light - Google Patents
Raschel tapestry capable of purifying indoor air under drive of visible light Download PDFInfo
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- CN111850734B CN111850734B CN202010599901.2A CN202010599901A CN111850734B CN 111850734 B CN111850734 B CN 111850734B CN 202010599901 A CN202010599901 A CN 202010599901A CN 111850734 B CN111850734 B CN 111850734B
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- 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
- D01F8/08—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyacrylonitrile as constituent
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G9/00—Bed-covers; Counterpanes; Travelling rugs; Sleeping rugs; Sleeping bags; Pillows
- A47G9/02—Bed linen; Blankets; Counterpanes
- A47G9/0207—Blankets; Duvets
- A47G9/0223—Blankets
-
- 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
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- 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
- 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
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
- D04B21/02—Pile fabrics or articles having similar surface features
- D04B21/04—Pile fabrics or articles having similar surface features characterised by thread material
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
Abstract
The invention discloses a raschel tapestry capable of purifying indoor air under the drive of visible light, which is formed by weaving acrylic fiber and polyester fiber composite fiber with an air purification function as wool yarns and polyester yarns as bottom yarns on a double-needle bed raschel warp knitting machine; the acrylic fiber and polyester composite fiber is a sheath-core structure composite fiber, wherein the core layer is polyester, and the sheath layer is acrylic fiber loaded with a visible light catalyst; the mass percent of the cortex layer of the acrylic polyester composite fiber is 75-80%, and the mass percent of the core layer is 20-25%; the acrylic fiber and polyester fiber composite fiber is used after post-treatment, and the post-treatment comprises the following steps: firstly, air plasma etching treatment is carried out, then mixed alkali solution treatment is carried out, water washing is carried out until the mixture is neutral, and drying is carried out. The invention can meet the requirement of indoor decoration, can purify indoor air, accords with the concept of healthy life of modern people, and brings new social benefit and economic benefit.
Description
Technical Field
The invention relates to the technical field of Raschel blanket production, in particular to a Raschel tapestry for purifying indoor air driven by visible light.
Background
In recent years, with the improvement of living standard of people, people pay more and more attention to the safety and functionality of textiles, and especially pay attention to the aspects of safety, sanitation, health, environmental protection and the like of the textiles. At present, artificial boards, paints, coatings and adhesives are widely used for decorative materials, which are major sources of indoor air pollution. However, due to the wide use of air conditioners and heating systems, the indoor environment is relatively closed, and indoor organic pollutants (such as formaldehyde, benzene, xylene and the like) are not easy to diffuse, so that the health of people is affected, and the pollution problem is generally concerned by people.
For example, CN 205613284U is a carbon fiber indoor air purifier, nanometer TiO is added 2 Coating the carbon fiber carrier fabric surface to construct an indoor air degradation layer; CN 209633931U an environment-friendly composite fabric for air purification, nanometer TiO 2 2 Coating the surface of flax fiber to form light contact fiber yarn; CN 109468828A is a functional curtain fabric containing nanometer TiO 2 The treating agent is used for treating the terylene-based anion fibers or the terylene fibers to be woven into fabrics. However, tiO is now commercially available 2 The forbidden bandwidth of the photocatalyst is only about 3.2eV, and only an ultraviolet light band with the wavelength less than 380nm can be utilized, and the part of light energy is very limited in indoor environment and cannot play the role of the catalyst.
In recent years, the construction of a Z-type heterogeneous photocatalytic system by using various photocatalysts has become the most effective way to improve photocatalytic efficiency. In order to fully utilize the limited light source of indoor environment, a high-efficiency visible light response type photocatalyst must be found. The multi-metal bismuth-based oxide is a novel visible light response type photocatalyst, the forbidden band width of the multi-metal bismuth-based oxide is more than 2.7eV, and the absorption edge of the multi-metal bismuth-based oxide to light is extended to the visible light wave band.
For example CN 104707632A is a visible light responsive Ag-AgBr/Bi 20 TiO 32 Composite photocatalyst, preparation and application thereof, and preparation method of composite photocatalyst by using light to reduce AgBrModified mesoporous Bi20TiO 32 Material to obtain Ag-AgBr/Bi 20 TiO 32 A composite photocatalyst with a Z-shaped structure; CN 110064437A surface regular loading Ag/BiOBr nano sheet cellulose-based fabric and preparation and application thereof, wherein BiOBr nano sheets are assembled on the surface of a carboxylation modified cellulose-based fabric layer by adopting ions, and silver ions on the surface of the BiOBr micro sheets are reduced and adsorbed by ultraviolet light, so that the surface of the BiOBr nano sheet cellulose-based fabric modified by silver particles is constructed. The method does not relate to the structural design of the load synthetic fiber in the process, and does not relate to the structural design and construction of the Raschel tapestry for purifying indoor air.
Disclosure of Invention
The invention aims to provide a Raschel tapestry for purifying indoor air under the drive of visible light, which solves the problem that the existing Raschel tapestry can not degrade or can efficiently degrade indoor organic pollutants.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a Raschel tapestry capable of purifying indoor air driven by visible light is formed by weaving acrylic fiber and polyester fiber composite fiber with an air purification function as wool yarns and polyester yarns as bottom yarns on a double-needle bed Raschel warp knitting machine; the acrylic fiber and polyester composite fiber is a sheath-core structure composite fiber, wherein the core layer is polyester, and the sheath layer is acrylic fiber loaded with a visible light catalyst; the mass percent of the cortex layer of the acrylic polyester composite fiber is 75-80%, and the mass percent of the core layer is 20-25%; the acrylic and polyester composite fiber is used after post-treatment, and the post-treatment comprises the following steps: firstly, air plasma etching treatment is carried out, then mixed alkali solution treatment is carried out, water washing is carried out until the mixture is neutral, and drying is carried out.
Raschel tapestry is often used as a decorative article due to low price, soft hand feeling, heat preservation, ventilation, pleasant color and pattern, and is deeply popular with people. The raw materials for preparing the Raschel tapestry mainly comprise acrylic fibers and terylene, and the acrylic fibers have high preparation cost and little difference with the terylene carpet in comprehensive performance, so the Raschel tapestry is gradually replaced by the terylene. However, the fiber directly supports the photocatalyst, and it is difficult to ensure effective contact of the catalyst with organic contaminants.
In the invention, the inventor weaves a Raschel tapestry which can drive and purify indoor air by visible light by taking typical composite fiber with a sheath-core structure as wool yarn and polyester as bottom yarn. From the aspect of performance, the composite fiber with the core-sheath structure is more beneficial to uniformly distributing the photocatalyst on the surface of the fiber. In addition, the acrylic fiber has excellent light stability and chemical stability, and the prepared Raschel tapestry for purifying indoor air driven by visible light is treated by air plasma and mixed alkali solution, so that the indoor air purifying capacity of the Raschel tapestry is far higher than that of the traditional Raschel tapestry and is also superior to other tapestries on the market, the cost is lower, the factors are beneficial to the popularization and application of the tapestries, and new experience is brought to users.
The inventor carries out alkali treatment on the sheath-core structure composite fiber, establishes relatively reasonable process conditions through repeated experiments, destroys the regular structure of the acrylic fiber on the basis of not obviously influencing the mechanical property and the appearance color of the acrylic fiber, depolymerizes partial molecular chains to form amide and carboxyl groups with hydrophilicity, and makes the sheath of the composite fiber more hydrophilic, so that the composite fiber can be additionally used as a water absorption material to absorb organic pollutants in the air while uniformly loading a visible light catalyst.
The key point of the invention is alkali treatment, and the hydrophilic groups can be uniformly dispersed on the surface of the sheath-core structure composite fiber only by realizing the uniform distribution of the alkali treatment positions. In response to this problem, the present inventors treated the surface of the sheath-core structured composite fiber with air plasma. When the air plasma etches the surface of the sheath-core structure composite fiber, hydrophilic groups such as amide and carboxyl are introduced to the surface of the sheath-core structure composite fiber. The uniformity of the air plasma etching effect is good, and uniform etching points are formed on the surface of the composite fiber with the sheath-core structure. The etching point can be used as a further alkali treatment positioning point of the sheath-core structure composite fiber, so that the alkali decrement of the sheath-core structure composite fiber is more regular and easy to control.
The alkali liquor used for acrylic fiber alkali decrement is sodium hydroxide solution or potassium hydroxide solution traditionally, and the method is characterized in thatThe two solutions have strong alkalinity and release NH by hydrolysis 3 The reaction with the non-hydrolyzed cyano group produces an amidino group, which gives a yellow color, which is disadvantageous for the appearance retention of the sheath-core structured composite fiber. According to the structural characteristics of the skin-core structure composite fiber after air plasma etching and the particularity of the components of the skin-core structure composite fiber, mixed alkali with weak alkalinity is obtained through multiple experimental screening and is used as alkali treatment liquid, and a relatively ideal alkali treatment effect can be obtained.
In the invention, the structure and the performance of the composite fiber with the sheath-core structure are designed, and the composite fiber with the sheath-core structure with the special-shaped section is obtained by adopting a herringbone, a cross, a triangle or a star spinning assembly. The surface of the composite fiber with the sheath-core structure is formed with regular fine grooves and fine holes by various special-shaped cross section structures, and the grooves and the holes are beneficial to irradiation and absorption of visible light, so that the loaded photocatalyst plays a role in driving and purifying indoor air.
The acrylic fiber loaded with the visible light catalyst is prepared by the following method:
(1) The raw material ratio is as follows: the coating comprises, by weight, 100 parts of polyacrylonitrile, 50-150 parts of visible light catalyst, 10-20 parts of nano silicon dioxide, 3-8 parts of silane coupling agent and 10-20 parts of tackifying resin;
(2) Mixing materials: mixing the visible light catalyst and the nano-silica with the silane coupling agent uniformly, then blending the mixture with the polyacrylonitrile and the tackifying resin, melting, extruding and granulating to obtain the acrylic fiber loaded with the visible light catalyst.
The tackifying resin is preferably a C9 hydrogenated petroleum resin or a terpene phenolic resin. The two resins have good transparency and little influence on visible light.
The acrylic fiber loaded with the visible light catalyst is specially designed, the silane coupling agent is used for improving the interface bonding capacity of the visible light catalyst, the nano silicon dioxide and the polyacrylonitrile substrate, the visible light catalyst is positioned on the skin layer to play a core purification role, the nano silicon dioxide is specifically added in cooperation with the visible light catalyst, and the visible light is more fully transmitted to the visible light catalyst through the refraction and scattering effects of the nano silicon dioxide on the visible light, so that the purification capacity of the visible light catalyst can be remarkably improved. The tackifying resin is added to enable the nano silicon dioxide, the nano silicon dioxide and the polyacrylonitrile matrix to have stronger binding force and prevent the nano silicon dioxide, the nano silicon dioxide and the polyacrylonitrile matrix from falling off easily after being washed with water.
The visible light catalyst is nano Bi 20 TiO 32 、Bi 2 WO 6 、BiVO 4 、Bi 2 MoO 6 One or more of (a).
The specific process of the air plasma etching treatment comprises the following steps: the acrylic fiber and polyester fiber composite fiber is laid on a steel wire mesh and placed in a plasma processing chamber, the output power is adjusted to 200-400 w, when the pressure reaches 30-60 pa, any one of oxygen, argon or nitrogen is introduced, and the processing is carried out for 1-3 min.
The mixed alkali solution is obtained by mixing strong alkali and alkaline salt in a mass ratio of 1; the alkali is one of sodium hydroxide and potassium hydroxide, and the alkaline salt is one of sodium bicarbonate, sodium carbonate, sodium phosphate and potassium carbonate; the temperature of the mixed alkali solution treatment is 80-90 ℃, and the time is 5-10 min.
The concentration of strong alkali in the mixed alkali solution is 2-5g/L, and the concentration of alkaline salt is 4-10g/L.
The section of the acrylic fiber and polyester fiber composite fiber is one of herringbone, cross, triangle or star.
The fineness of the acrylic fiber and polyester fiber composite fiber is 2-3D.
The invention has the beneficial effects that:
(1) The raschel tapestry for purifying indoor air driven by visible light is prepared by using acrylic fibers loaded with a visible light catalyst as a skin layer and polyester as a core material, and using composite fibers with a typical skin-core structure as wool yarns and polyester as a bottom yarn. The indoor air purifying capacity of the carpet is far higher than that of the traditional Raschel tapestry and is also superior to other tapestries on the market; in addition, the raw material composition is simple, the cost is low, and the factors are beneficial to the popularization and application of the tapestry.
(2) The herringbone, cross, triangular or star-shaped spinning assembly is adopted to obtain the skin-core structure composite fiber with the special-shaped cross section, the air plasma and alkali treatment process is carried out on the skin-core structure composite fiber, regular fine grooves and fine holes are formed on the surface of the skin-core structure composite fiber, the grooves and the holes are favorable for irradiation and absorption of visible light, and the loaded photocatalyst can play a role in driving and purifying indoor air.
(3) According to the structural characteristics of the sheath-core structure composite fiber after air plasma etching and the particularity of the components of the sheath-core structure composite fiber, the mixed alkali is used as the treatment solution for alkali reduction, so that a relatively ideal alkali reduction effect can be obtained, and good photocatalytic performance can be obtained.
(4) The raschel tapestry with the indoor air purification function driven by visible light can meet the requirement of indoor decoration, can purify the indoor air, accords with the healthy living concept of modern people, and brings new social benefit and economic benefit.
Detailed Description
The technical solution of the present invention will be further specifically described below by way of specific examples.
In the present invention, the raw materials and equipment used are commercially available or commonly used in the art, unless otherwise specified. The methods in the following examples are conventional in the art unless otherwise specified.
Example 1:
a raschel tapestry driven by visible light for purifying indoor air is woven by a double needle bed raschel warp knitting machine by taking acrylic fiber and polyester fiber composite fiber with an air purifying function as wool yarns and polyester yarns as bottom yarns. The acrylic fiber and polyester composite fiber is a sheath-core structure composite fiber, wherein the core layer is polyester, and the sheath layer is acrylic fiber loaded with a visible light catalyst; the mass percent of the cortex layer of the acrylic polyester composite fiber is 75%, and the mass percent of the core layer of the acrylic polyester composite fiber is 25%.
The acrylic fiber loaded with the visible light catalyst is prepared by the following method:
(1) The raw material ratio is as follows: 100 parts of polyacrylonitrile and a visible light catalyst (nano-Bi) by weight of all raw materials 20 TiO 32 Commercially available) 150 parts, nano-silica 20 parts, silane8 parts of a coupling agent and 20 parts of tackifying resin (C9 hydrogenated petroleum resin sold in the market);
(2) Mixing materials: mixing the visible light catalyst and the nano silicon dioxide with the silane coupling agent, then blending with the polyacrylonitrile and the tackifying resin, melting, extruding and granulating to obtain the acrylic fiber loaded with the visible light catalyst.
Obtain the cross-section for the skin-core structure composite fiber of herringbone (acrylic fibres dacron composite fiber, fibre number is 2D) with herringbone's spinning subassembly, place the cross-section for skin-core structure composite fiber of herringbone's skin-core structure tiling on the steel wire mesh in plasma treatment chamber, transfer output to 200w, when pressure reached 30pa, let in argon gas, handle 3min. Then soaking the mixture in 90 ℃ mixed alkali solution for treatment for 5min, taking out the mixture, washing the mixture with water to be neutral, and drying the mixture to obtain the catalyst. Wherein the concentration of sodium hydroxide in the mixed alkali solution is 2g/L, and the concentration of sodium bicarbonate is 4g/L.
The raschel tapestry for purifying indoor air driven by visible light prepared in the present example was tested according to the standard of GB50325-2001 "civil construction engineering indoor environmental pollution control regulations". The door and the window are required to be closed for 1 hour before detection, the drawers of the cabinet are completely opened, residual decoration materials do not need to be left in a room, and the temperature is preferably controlled to be about 23 ℃. After testing, the concentration of pollutants such as radon, formaldehyde, benzene, ammonia, TVOC and the like in the air of a room where the raschel tapestry prepared by the embodiment is placed is greatly reduced, and the pollutants all reach the I-type civil building engineering standard. The raschel tapestry for purifying indoor air driven by visible light prepared by the embodiment has good air purifying performance.
Example 2:
a raschel tapestry capable of purifying indoor air driven by visible light is formed by weaving acrylic fiber and polyester fiber composite fiber with an air purifying function as wool yarns and polyester yarns as bottom yarns on a double-needle bed raschel warp knitting machine. The acrylic fiber and polyester composite fiber is a sheath-core structure composite fiber, wherein the core layer is polyester, and the sheath layer is acrylic fiber loaded with a visible light catalyst; the mass percent of the sheath layer of the acrylic polyester composite fiber is 78%, and the mass percent of the core layer of the acrylic polyester composite fiber is 22%.
The acrylic fiber loaded with the visible light catalyst is prepared by the following method:
(1) The raw material ratio is as follows: 100 parts of polyacrylonitrile and a visible light catalyst (nano-Bi) by weight 2 WO 6 Commercial product) 100 parts, nano-silica 15 parts, silane coupling agent 5 parts, and tackifying resin (C9 hydrogenated petroleum resin, commercial product) 15 parts;
(2) Mixing materials: mixing the visible light catalyst and the nano-silica with the silane coupling agent uniformly, then blending the mixture with the polyacrylonitrile and the tackifying resin, melting, extruding and granulating to obtain the acrylic fiber loaded with the visible light catalyst.
The method comprises the steps of obtaining sheath-core structure composite fibers (acrylic fiber and polyester composite fibers with the fineness of 3D) with cross-shaped sections by using a cross-shaped spinning assembly, flatly paving the sheath-core structure composite fibers with the cross-shaped sections on a steel wire mesh, placing the steel wire mesh in a plasma treatment chamber, adjusting the output power to 300w, introducing nitrogen when the pressure reaches 40pa, and treating for 2min. Then soaking the mixture in mixed alkali solution at 85 ℃ for treatment for 8min, taking out the mixture, washing the mixture with water to be neutral, and drying the mixture to obtain the catalyst. Wherein the concentration of sodium hydroxide in the mixed alkali solution is 4g/L, and the concentration of sodium bicarbonate is 8g/L.
The raschel tapestry for purifying indoor air driven by visible light prepared in the present example was tested according to the standard of GB50325-2001 "civil construction engineering indoor environmental pollution control regulations". The door and the window are required to be closed for 1 hour before detection, the drawers of the cabinet are completely opened, residual decoration materials do not need to be left in a room, and the temperature is preferably controlled to be about 23 ℃.
Example 3:
a raschel tapestry driven by visible light for purifying indoor air is woven by a double needle bed raschel warp knitting machine by taking acrylic fiber and polyester fiber composite fiber with an air purifying function as wool yarns and polyester yarns as bottom yarns. The acrylic fiber and polyester composite fiber is a sheath-core structure composite fiber, wherein the core layer is polyester, and the sheath layer is acrylic fiber loaded with a visible light catalyst; the mass percent of the sheath layer of the acrylic polyester composite fiber is 78%, and the mass percent of the core layer of the acrylic polyester composite fiber is 22%.
The acrylic fiber loaded with the visible light catalyst is prepared by the following method:
(1)the raw material ratio is as follows: each raw material comprises 100 parts by weight of polyacrylonitrile and a visible light catalyst (nanoscale BiVO) 4 Commercially available) 50 parts, nano-silica 10 parts, silane coupling agent 3 parts, and tackifying resin (terpene phenolic resin, commercially available) 10 parts;
(2) Mixing materials: mixing the visible light catalyst and the nano silicon dioxide with the silane coupling agent, then blending with the polyacrylonitrile and the tackifying resin, melting, extruding and granulating to obtain the acrylic fiber loaded with the visible light catalyst.
The method comprises the steps of obtaining skin-core structure composite fibers (acrylic fiber and polyester fiber composite fibers with the fineness of 3D) with triangular sections by using a triangular spinning assembly, flatly paving the skin-core structure composite fibers with the triangular sections on a steel wire mesh, placing the steel wire mesh in a plasma processing chamber, adjusting the output power to 300w, introducing nitrogen when the pressure reaches 40pa, and processing for 2min. Then soaking the mixture in mixed alkali solution at 85 ℃ for treatment for 8min, taking out the mixture, washing the mixture with water to be neutral, and drying the mixture to obtain the catalyst. Wherein the concentration of potassium hydroxide in the mixed alkali solution is 4g/L, and the concentration of sodium phosphate is 8g/L.
The raschel tapestry for purifying indoor air driven by visible light prepared in the present example was tested according to the standard of GB50325-2001 "civil construction engineering indoor environmental pollution control regulations". The door and the window are required to be closed for 1 hour before detection, the drawers of the cabinet are completely opened, residual decoration materials do not need to be left in a room, and the temperature is preferably controlled to be about 23 ℃.
Example 4:
a raschel tapestry driven by visible light for purifying indoor air is woven by a double needle bed raschel warp knitting machine by taking acrylic fiber and polyester fiber composite fiber with an air purifying function as wool yarns and polyester yarns as bottom yarns. The acrylic fiber and polyester composite fiber is a sheath-core structure composite fiber, wherein the core layer is polyester, and the sheath layer is acrylic fiber loaded with a visible light catalyst; the mass percent of the cortex layer of the acrylic polyester composite fiber is 80%, and the mass percent of the core layer of the acrylic polyester composite fiber is 20%.
The acrylic fiber loaded with the visible light catalyst is prepared by the following method:
(1) The raw material ratio is as follows: 100 parts of polyacrylonitrile and a visible light catalyst (nano-scale)Bi 2 MoO 6 Commercial product) 100 parts, nano-silica 15 parts, silane coupling agent 5 parts, and tackifying resin (C9 hydrogenated petroleum resin, commercial product) 15 parts;
(2) Mixing materials: mixing the visible light catalyst and the nano-silica with the silane coupling agent uniformly, then blending the mixture with the polyacrylonitrile and the tackifying resin, melting, extruding and granulating to obtain the acrylic fiber loaded with the visible light catalyst.
Obtain the cross-section for the skin-core structure composite fiber of herringbone (acrylic fibres dacron composite fiber, fibre number is 2D) with herringbone's spinning subassembly, place the cross-section for skin-core structure composite fiber of herringbone's skin-core structure tiling on the steel wire mesh in plasma treatment chamber, transfer output to 400w, when pressure reached 60pa, let in oxygen, handle 1min. Then soaking the mixture in mixed alkali solution at 80 ℃ for treatment for 10min, taking out the mixture, washing the mixture with water to be neutral, and drying the mixture to obtain the catalyst. Wherein the concentration of potassium hydroxide in the mixed alkali solution is 5g/L, and the concentration of potassium carbonate is 10g/L.
The raschel tapestry for purifying indoor air driven by visible light prepared in the present example was tested according to the standard of GB50325-2001 "civil construction engineering indoor environmental pollution control regulations". The door and the window are closed for 1 hour before detection, the drawers of the cabinet are completely opened, residual decoration materials do not need to be left in a room, and the temperature is preferably controlled to be about 23 ℃.
Comparative example 1
A raschel tapestry driven by visible light for purifying indoor air is woven by a double needle bed raschel warp knitting machine by taking acrylic fiber and polyester fiber composite fiber with an air purifying function as wool yarns and polyester yarns as bottom yarns. The acrylic and polyester composite fiber is a composite fiber with a skin-core structure, wherein the core layer is polyester, and the skin layer is acrylic fiber loaded with a visible light catalyst; the mass percent of the sheath layer of the acrylic polyester composite fiber is 75%, and the mass percent of the core layer of the acrylic polyester composite fiber is 25%.
The acrylic fiber loaded with the visible light catalyst is prepared by the following method:
(1) The raw material ratio is as follows: 100 parts of polyacrylonitrile and a visible light catalyst (nano-Bi) by weight 20 TiO 32 Commercially available) 150 parts, nano-silica 20 parts,8 parts of silane coupling agent and 20 parts of tackifying resin (C9 hydrogenated petroleum resin sold in the market);
(2) Mixing materials: mixing the visible light catalyst and the nano-silica with the silane coupling agent uniformly, then blending the mixture with the polyacrylonitrile and the tackifying resin, melting, extruding and granulating to obtain the acrylic fiber loaded with the visible light catalyst.
The herringbone spinning assembly is used for obtaining the skin-core structure composite fiber (acrylic fiber and polyester fiber composite fiber, the fineness is 2D) with the herringbone section, and air plasma etching and mixed alkali treatment are not carried out.
The raschel tapestry for purifying indoor air driven by visible light prepared in the embodiment is tested according to the standard of GB50325-2001, namely 'control standard of indoor environmental pollution in civil construction engineering'. The door and the window are required to be closed for 1 hour before detection, the drawers of the cabinet are completely opened, residual decoration materials do not need to be left in a room, and the temperature is preferably controlled to be about 23 ℃.
Comparative example 2:
a raschel tapestry driven by visible light for purifying indoor air is woven by a double needle bed raschel warp knitting machine by taking acrylic fiber and polyester fiber composite fiber with an air purifying function as wool yarns and polyester yarns as bottom yarns. The acrylic fiber and polyester composite fiber is a sheath-core structure composite fiber, wherein the core layer is polyester, and the sheath layer is acrylic fiber loaded with a visible light catalyst; the mass percent of the cortex layer of the acrylic polyester composite fiber is 75%, and the mass percent of the core layer of the acrylic polyester composite fiber is 25%.
The acrylic fiber loaded with the visible light catalyst is prepared by the following method:
(1) The raw material ratio is as follows: 100 parts of polyacrylonitrile and a visible light catalyst (nano-Bi) by weight 20 TiO 32 Commercially available) 150 parts, 8 parts of silane coupling agent, 20 parts of tackifying resin (C9 hydrogenated petroleum resin, commercially available) (the formula does not contain nano silicon dioxide);
(2) Mixing materials: mixing the visible light catalyst and the nano silicon dioxide with the silane coupling agent, then blending with the polyacrylonitrile and the tackifying resin, melting, extruding and granulating to obtain the acrylic fiber loaded with the visible light catalyst.
Obtain the skin-core structure composite fiber (acrylic fibre dacron composite fiber, the fineness is 2D) that the cross-section is for the chevron shape with chevron shape spinning subassembly, place the skin-core structure composite fiber that the cross-section is for the chevron shape on the wire netting and place in plasma processing chamber, transfer output to 200w, when pressure reached 30pa, let in argon gas, handle 3min. Then immersing the mixture into mixed alkali solution at 90 ℃ for treatment for 5min, taking out the mixture, washing the mixture with water to be neutral, and drying the mixture to obtain the catalyst. Wherein the concentration of sodium hydroxide in the mixed alkali solution is 2g/L, and the concentration of sodium bicarbonate is 4g/L.
The raschel tapestry for purifying indoor air driven by visible light prepared in the present example was tested according to the standard of GB50325-2001 "civil construction engineering indoor environmental pollution control regulations". The door and the window are required to be closed for 1 hour before detection, the drawers of the cabinet are completely opened, residual decoration materials do not need to be left in a room, and the temperature is preferably controlled to be about 23 ℃.
The detection results of the concentrations of the pollutants after the raschel tapestry prepared in the comparative example and the example purifies the indoor air are shown as follows:
the Raschel tapestry treated by the Raschel tapestry has the advantages that the concentration of pollutants such as radon, formaldehyde, benzene, ammonia, TVOC and the like in the air is greatly reduced, the Raschel tapestry reaches the civil building engineering standard of class II and above, and the Raschel tapestry for purifying the indoor air driven by the visible light has good air purifying performance. Among them, the air purifying ability of example 4 is optimized. The room purified by the Raschel tapestry reaches I-type civil building engineering standard, and the indoor air purifying capacity of the Raschel tapestry is far higher than that of other tapestries on the market. Therefore, the raschel tapestry with the indoor air being purified driven by the visible light, which is obtained by the invention, can meet the requirements of indoor decoration, can also purify the indoor air, accords with the healthy living concept of modern people, and brings new social benefits and economic benefits.
The above-described embodiment is a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (6)
1. A raschel tapestry driven by visible light for purifying indoor air is characterized in that acrylic fiber and polyester fiber composite fiber with air purification function is used as a wool yarn, and polyester yarn is used as a bottom yarn and is woven on a double needle bed raschel warp knitting machine; the acrylic fiber and polyester composite fiber is a sheath-core structure composite fiber, wherein the core layer is polyester, and the sheath layer is acrylic fiber loaded with a visible light catalyst; the mass percent of the cortex layer of the acrylic polyester composite fiber is 75-80%, and the mass percent of the core layer is 20-25%; the acrylic and polyester composite fiber is used after post-treatment, and the post-treatment comprises the following steps: firstly, performing air plasma etching treatment, then mixing with an alkali solution for treatment, washing with water to be neutral, and drying;
the acrylic fiber loaded with the visible light catalyst is prepared by the following method:
(1) The raw material ratio is as follows: the coating comprises the following raw materials, by weight, 100 parts of polyacrylonitrile, 50-150 parts of visible light catalyst, 10-20 parts of nano silicon dioxide, 3-8 parts of silane coupling agent and 10-20 parts of tackifying resin;
(2) Mixing materials: uniformly mixing the visible light catalyst and the nano-silica with a silane coupling agent, then blending the mixture with polyacrylonitrile and tackifying resin, melting, extruding and granulating to obtain acrylic fibers loaded with the visible light catalyst;
the visible light catalyst is nano Bi 20 TiO 32 、Bi 2 WO 6 、BiVO 4 、Bi 2 MoO 6 One or more of (a).
2. A Raschel tapestry for visible light driven indoor air purification according to claim 1, wherein the specific process of the air plasma etching treatment comprises: the acrylic fiber and polyester fiber composite fiber is laid on a steel wire mesh and placed in a plasma processing chamber, the output power is adjusted to 200-400 w, when the pressure reaches 30-60 Pa, any one of oxygen, argon or nitrogen is introduced, and the processing is carried out for 1-3 min.
3. The raschel tapestry for purifying indoor air driven by visible light as claimed in claim 1, wherein the mixed alkali solution is obtained by mixing strong alkali and alkaline salt in a mass ratio of 1; the alkali is one of sodium hydroxide and potassium hydroxide, and the alkaline salt is one of sodium bicarbonate, sodium carbonate, sodium phosphate and potassium carbonate; the temperature of the mixed alkali solution treatment is 80-90 ℃, and the time is 5-10 min.
4. The raschel tapestry for purifying indoor air driven by visible light as claimed in claim 3, wherein the concentration of the alkali in the mixed alkali solution is 2-5g/L, and the concentration of the alkali salt is 4-10g/L.
5. The raschel tapestry for purifying indoor air driven by visible light as claimed in claim 1, wherein the cross-section of the acrylic polyester composite fiber is one of herringbone, cross, triangle or star.
6. The raschel tapestry for purifying indoor air driven by visible light as claimed in claim 1, wherein the fineness of the acrylic polyester composite fiber is 2-3D.
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| CN113827079B (en) * | 2021-09-29 | 2023-03-24 | 浙江真爱毯业科技有限公司 | Outdoor blanket with day radiation refrigeration function |
| CN115444260A (en) * | 2022-09-28 | 2022-12-09 | 浙江真爱毯业科技有限公司 | Raschel blanket with insect prevention function |
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