Aerogel-based modified anti-penetrating down feather and down fabric and a preparation method thereof

Abstract

The application discloses a drilling-proof down feather and down fabric based on aerogel modification and a preparation method thereof, and relates to the technical field of fabrics.The structure of the drilling-proof down feather and down fabric comprises, from inside to outside, a unidirectional moisture-conducting base cloth layer, a hot melt adhesive net layer one, an aerogel modification functional layer, a hot melt adhesive net layer two and an anti-static surface layer; the aerogel modification functional layer is prepared from raw materials in a mass ratio of silica aerogel slurry:resin emulsion:magnetic powder=4-6:1:0.2-0.6.The fabric has the drilling-proof property, and the air permeability, moisture permeability and mechanical properties of the fabric are improved to a certain extent.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fabrics, and particularly relates to a down-proof down fabric based on aerogel modification and a preparation method thereof. BACKGROUND

[0002] Down jackets are warm-keeping clothes in winter, and the down filled in the down jackets can provide good thermal insulation. In the production process of down jackets, the selection of the fabric has different functional requirements such as thermal insulation, waterproof, dirt-proof, wind-proof, air permeability and moisture permeability due to different wearing and environmental conditions. In addition, since the fabric is usually knitted or woven, the pore structure of the fabric leads to the risk of down penetration and leakage when the down is filled in the fabric.

[0003] At present, different solutions have been proposed for the down penetration problem of down jacket fabric. For example, the weaving density of the fabric is increased, the fabric is coated or laminated, and the weaving density of the fabric is increased, which leads to an increase in the fabric weight. In the demand for lightweight clothing, the application effect is further improved, and the fabric is coated or laminated, which is studied more.

[0004] The aerogel film is a new type of nanoporous material with controllable nanostructure and large specific surface area. The fabric prepared by compounding the aerogel film with the base cloth has good down-proof effect. The modification of the aerogel film has positive significance for further improving the other performance of the coated fabric in addition to the down-proof effect. SUMMARY

[0005] The purpose of the present application is to provide a down-proof down fabric based on aerogel modification and a preparation method thereof to solve the above problems.

[0006] The present application achieves the above-mentioned purposes through the following technical solutions:

[0007] As a first aspect of the present application, the present application provides a down-proof down fabric based on aerogel modification. The structure of the down-proof down fabric includes a unidirectional moisture-conducting base cloth layer, a hot melt adhesive net layer one, an aerogel modified functional layer, a hot melt adhesive net layer two and an anti-static surface layer arranged from inside to outside in sequence. The aerogel modified functional layer is prepared from the following raw materials in a mass ratio: silica aerogel slurry: resin emulsion: magnetic powder = 4-6:1:0.2-0.6.

[0008] As a further optimization scheme of the present application, the silica aerogel slurry is prepared from the following raw materials in a mass percentage: silica aerogel powder 10-50%, eucalyptus oil 5-10%, sodium dodecyl sulfate 5-10%, and the balance is deionized water.

[0009] As a further optimization scheme of the present application, the composition of the single-direction wet guide base cloth layer is 50% polypropylene-50% cotton weft-knitted double-layer fabric, and the composition of the anti-static surface layer is 100% polyester fabric.

[0010] As a further optimization scheme of the present application, the resin emulsion is one or more of an acrylic resin emulsion, an EVA resin emulsion or an epoxy resin emulsion.

[0011] As a second aspect of the present application, the present application also provides a preparation method of the aerogel modified anti-drilling down feather and down fabric as described in any of the above, specifically comprising the following steps:

[0012] (1) preparing an aerogel modified functional layer, uniformly mixing silica aerogel slurry, resin emulsion and magnetic powder to obtain a film casting slurry, coating the film casting slurry on a glass substrate, applying a magnetic field force in a spiral reciprocating vertical movement on the glass substrate, applying for 30-60s, then standing for 30min, and drying at 40-100℃ for 1-3h to obtain the aerogel modified functional layer;

[0013] (2) performing water-repellent treatment on the hydrophobic surface of the single-direction wet guide base cloth layer;

[0014] (3) placing the hydrophilic surface of the single-direction wet guide base cloth layer treated in step (2) upwards, sequentially stacking hot melt adhesive mesh layer one, the aerogel modified functional layer, hot melt adhesive mesh layer two and the anti-static surface layer, and then performing hot pressing treatment to obtain the aerogel modified anti-drilling down feather and down fabric.

[0015] As a further optimization scheme of the present application, in step (2), the specific steps of the water-repellent treatment are: first, cooking the single-direction wet guide base cloth layer at 100-120℃ for 30min, then dipping and padding in a water-repellent treatment liquid for 30min, bath ratio 1:20-30, padding rate 70-75%, finally, pre-drying at 60℃ for 15min, and baking at 100℃ for 5min.

[0016] As a further optimization scheme of the present application, in step (3), the hot pressing temperature is 100-120℃, the hot pressing time is 120-150s, and the hot pressing pressure is 2-4MPa.

[0017] The present application has the following advantages:

[0018] (1) The structure of the anti-drilling down feather and down fabric provided by the present application comprises, from inside to outside, a single-direction wet guide base cloth layer, a hot melt adhesive mesh layer one, an aerogel modified functional layer, a hot melt adhesive mesh layer two and an anti-static surface layer, the composition of the aerogel modified functional layer is improved to make the fabric have the anti-drilling down feather property, and the air permeability, moisture permeability and mechanical properties of the fabric are also improved to a certain extent;

[0019] (2) The magnetic powder is added in the composition of the aerogel modified functional film. During the preparation of the functional film, the magnetic powder produces micro-vibration in the casting film slurry under the action of the magnetic field force of spiral reciprocating vertical movement, which promotes the dispersion of the casting film slurry and makes the eucalyptus oil fully foam, so that the surface pore structure of the finally obtained aerogel modified functional film is more dense and uniform, thereby ensuring that the fabric has better air and moisture permeability.

[0020] (3) The resin emulsion is added in the composition of the aerogel modified functional film, which helps to improve the flexibility of the aerogel modified functional film, so that the tear strength and bursting strength of the fabric are improved, and the mechanical properties of the fabric are strengthened. DETAILED DESCRIPTION

[0021] The following detailed description of the application is further described, it is necessary to point out here that the following detailed description is only used to further illustrate the application, and cannot be understood as limiting the scope of protection of the application, and those skilled in the art can make some non-essential improvements and adjustments to the application according to the above application content.

[0022] 1. Materials and methods

[0023] In the following examples, the specific method is not specified, and can be carried out according to the conventional method. The materials, reagents, etc. used, if not specially specified, can be obtained through commercial channels.

[0024] 2. Methods

[0025] 2.1. Preparation of aerogel modified functional layer

[0026] The silica aerogel slurry, resin emulsion and magnetic powder are uniformly mixed to obtain a casting film slurry. The casting film slurry is coated on a glass substrate, and a magnetic field force of spiral reciprocating vertical movement is applied on the glass substrate for 30 s. Then, after standing for 30 min, the glass substrate is dried at 80℃ for 2 h to obtain an aerogel modified functional layer A.

[0027] Among them, the silica aerogel slurry: resin emulsion: magnetic powder = 4:1:0.6, wherein the resin emulsion is an equal mass mixture of acrylic resin emulsion and EVA resin emulsion.

[0028] The silica aerogel slurry is prepared from the following raw materials in mass percentage: silica aerogel powder 30%, eucalyptus oil 5%, sodium dodecyl sulfate 5%, and the balance is deionized water.

[0029] The composition and preparation method of the aerogel modified functional layer are adjusted to obtain an aerogel modified functional layer B, and the specific adjustment scheme is as follows:

[0030] Aerogel modified functional layer B: no magnetic powder is added, and the same amount of talcum powder is used instead.

[0031] Aerogel modified functional layer C: no resin emulsion is added, and the same amount of N, N-dimethylformamide is used instead.

[0032] Aerogel modified functional layer D: the silica aerogel slurry is prepared from the following raw materials in the following mass percentages: silica aerogel powder 30%, eucalyptus oil 10%, sodium dodecyl sulfate 5%, and the balance being deionized water;

[0033] Aerogel modified functional layer E: the silica aerogel slurry is prepared from the following raw materials in the following mass percentages: silica aerogel powder 30%, sodium dodecyl sulfate 5%, and the balance being deionized water;

[0034] 2.2, Pretreatment of the one-way moisture guide cloth layer

[0035] The one-way moisture guide cloth layer is cooked at 100°C for 30 min, then immersed in the water-repellent treatment liquid for 30 min at a bath ratio of 1:20 and a pick-up rate of 70%, and finally pre-dried at 60°C for 15 min and baked at 100°C for 5 min.

[0036] 2.3, Preparation of the anti-piercing down feather and down fabric

[0037] The one-way moisture guide cloth layer treated in step 2.2 is placed with the hydrophilic surface facing up, and the hot melt adhesive mesh layer one, the aerogel modified functional layer A-E, the hot melt adhesive mesh layer two, and the anti-static surface layer are sequentially stacked thereon, and then heat pressed to obtain the anti-piercing down feather and down fabric a-e based on aerogel modification, the heat pressing temperature is 120°C, the heat pressing time is 120 s, and the heat pressing pressure is 2 MPa.

[0038] The one-way moisture guide cloth layer is composed of 50% polypropylene-50% cotton weft-knitted double-layer fabric, the anti-static surface layer is composed of 100% polyester fabric, and the hot melt adhesive mesh layer one and the hot melt adhesive mesh layer two are both polyamide adhesive mesh (pore size 100-200 μm, use temperature 110-140°C).

[0039] In addition, based on the prepared aerogel modified functional layer A, the one-way moisture guide cloth layer is replaced by polypropylene knitted fabric and cotton knitted fabric respectively to obtain anti-piercing down feather and down fabrics f-g.

[0040] In addition, the fabric sample prepared without the aerogel modified functional layer is used as a control group

[0041] 3, Performance test

[0042] 3.1, Wicking test of the anti-piercing down feather and down fabric a-g

[0043] Reference FZ / T 01071-2008 "Textiles Capillary Effect Test Method", the fabric is cut into 250mm x 30mm long strip samples in warp and weft directions, 3 parallel samples are taken for each group of samples, and the result is the average of 3 groups of test results.

[0044] During testing, the sample (short side as test side) is naturally suspended vertically above the liquid with red dye, the lower end is immersed in the liquid by about 15mm, and the maximum height of the liquid rising along the sample within 30min is recorded, that is, the wicking height, and the results are shown in Table 1.

[0045] Table 1 Wicking test results

[0046]

[0047] During the process of moisture conduction, the phenomenon of water transfer by capillary effect is the wicking of the fabric, which reflects the moisture conduction capacity of the fabric, which is generally measured by wicking height. Under specified conditions, the higher the wicking height of the fabric, the more obvious the capillary effect, and the higher the water transfer capacity.

[0048] As can be seen from the table, the wicking height of fabric a and fabric d is better than that of other fabric samples. It can be seen that the moisture conductivity of fabric a and fabric d is better than that of other fabrics. Fabric f uses polypropylene knitted fabric instead of unidirectional moisture-conducting base cloth layer. Because polypropylene knitted fabric itself is not hydrophilic and has low moisture absorption, it causes the moisture conductivity of fabric f to be significantly lower than that of other fabrics. Fabric g uses cotton knitted fabric, which has good moisture absorption. However, as can be seen from the table, its wicking height is not as good as that of fabric a. This is because the unidirectional moisture-conducting base cloth layer used in fabric a is composed of 50% polypropylene-50% cotton weft-knitted double-layer fabric. The upper and lower layers are formed by polypropylene and cotton respectively, which have different hydrophilic and hydrophobic properties, realizing differential capillary effect, and thus obtaining better moisture conductivity compared with pure cotton knitted fabric.

[0049] 3.2, Test of air permeability and moisture permeability of anti-down feather fabric a-g

[0050] (1) Air permeability test: the air permeability test equipment is YG461E III type full-automatic air permeability tester, the test area is 20cm 2 , the pressure drop is 100Pa, and the test is carried out according to the standard of GB / T5453 1997 "Determination of air permeability of textile fabrics". 3 parallel samples are taken for each group of samples, and the result is the average of 3 groups.

[0051] The air permeability of fabric refers to the performance of air permeating through both sides of the fabric under a specified pressure difference, which is represented by air permeability R, that is, the volume of air permeating through the fabric per unit time per unit area under a specified pressure difference. The higher the R value, the better the air permeability of the fabric. The air permeability is R = 167q v / A; q vdm is the average air flow, g / min 3 A is the test area, cm 2 ; 167 is a conversion coefficient.

[0052] (4) Moisture permeability test: The moisture permeability test equipment is YG601H-II computerized fabric moisture permeability tester and electronic balance, the test temperature is (38±2)℃, and the relative humidity is (50±2)%. The standard of GB / T12704.2 2009 “Textiles-Moisture resistance-Part 2: Evaporative method” is referred to, and the positive cup method is selected for testing. Three parallel samples are taken in each group, and the results are taken as the average value of three groups after 1h of balancing in the test box.

[0053] The fabric moisture permeability refers to the ability of the fabric to allow water molecules to penetrate from one side to the other, which is measured by the moisture permeability WVT, and the larger the moisture permeability, the better the moisture permeability of the fabric, i.e. WVT = 24△m / (A t );

[0054] Wherein, WVT is the moisture permeability, g / (m 2 ·24h);△m is the difference between the mass of the same test combination measured twice, g; A is the effective test area, m 2 , the sample diameter is 60mm; t is the test time, h.

[0055] The results are shown in Table 2.

[0056] Table 2: Test results of air permeability and moisture permeability

[0057]

[0058]

[0059] As can be seen from Table 2, the fabric a and the fabric d have better air permeability and moisture permeability compared with other fabrics, and the air permeability and moisture permeability values of the control group without aerogel modified functional film are not much different, indicating that the aerogel modified functional film used in the fabric a and the fabric d has excellent pore structure and does not affect the overall air permeability and moisture permeability of the fabric. The composition of the aerogel modified functional film of the fabric b uses talc powder instead of magnetic powder, and the silica aerogel slurry used in the aerogel modified functional film of the fabric e does not contain eucalyptus oil. As can be seen from the table, the air permeability and moisture permeability of the fabric b and the fabric e are not as good as that of the fabric a.

[0060] The reason is that during the preparation of the aerogel modified functional film, the magnetic powder produces micro-vibration in the casting film slurry under the action of the magnetic field force of the spiral reciprocating vertical movement, which promotes the dispersion of the casting film slurry and makes the eucalyptus oil fully foam, so that the surface pore structure of the finally obtained aerogel modified functional film is more dense and uniform, thereby ensuring that the fabric with the aerogel modified functional film still has better air permeability and moisture permeability.

[0061] 3.3, Mechanical property test of anti-piercing down feather and down fabric a-g

[0062] (1) Tear strength test: impact pendulum method was used for testing. The test equipment was a tear strength machine, and the test was carried out according to GB / T 3917.1 2009 "Textile fabric tear resistance Part 1: Determination of tear strength by impact pendulum method", the sample size was 10 cm x 10 cm, and the sample was prepared in warp and weft direction for each fabric sample, 3 sets of parallel samples were set for each sample, and the result was the average value of 3 sets.

[0063] (2) Burst strength test: steel ball method was used for burst strength test of fabric. The test equipment was a multifunctional electronic fabric strength machine. The test was carried out according to GB / T 19976 2005 "Determination of burst strength of textiles by steel ball method", the sample size was a circle with a diameter of 7.5 cm, and the spherical top rod size was 25 mm in diameter. The sample was fixed in the holder, and after starting the instrument, the spherical top rod above the sample moved downward at a constant speed until the sample was burst, and the burst strength and burst work were measured. 3 sets of parallel samples were taken for each sample, and the result was the average value of 3 sets.

[0064] The results are shown in Table 3.

[0065] Table 3 Mechanical property test results

[0066]

[0067]

[0068] From Table 3, it can be seen that the mechanical properties such as tear strength and burst strength of fabric a and fabric d are better than those of other fabrics, and the mechanical properties of fabric c are not as good as those of fabric a because the composition of aerogel modified functional film of fabric c does not add resin emulsion, which can improve the flexibility of aerogel modified functional film and improve the tear strength and burst strength of the fabric, and the mechanical properties of the fabric are strengthened.

[0069] The reason why the mechanical properties of fabric e are better than those of fabric a and d is that the silica aerogel slurry in the composition of aerogel modified functional film of fabric e does not contain eucalyptus oil, which leads to the fact that the fabric pore effect is not as good as that of fabric d, that is, the air and moisture permeability is not as good as that of fabric d, but the mechanical properties are slightly better than those of fabric a and d. Fabric a compared with fabric e proves that eucalyptus oil can ensure the air and moisture permeability of the fabric and also ensure the good mechanical properties of the fabric under the appropriate amount of eucalyptus oil.

[0070] The mechanical property of the fabric b is inferior to that of the fabric a, because the talc powder is used to replace the magnetic powder in the component of the aerogel modified functional film of the fabric b, the aerogel modified functional film of the fabric b cannot be affected by the magnetic field force, the film surface uniformity of the aerogel modified functional film of the fabric b is inferior to that of the fabric a, the stress dispersion effect is not good when the fabric b is subjected to the external tearing and bursting force, and thus the mechanical property is inferior to that of the fabric a.

[0071] 3.4, the anti-picking property test of the anti-picking down fabric a-g

[0072] According to the national standard GB / T12705.2-2009 "Textile Fabric Anti-picking Property Test Method Part 2: Box Method", when the number of picked down of the fabric is greater than 15, the anti-picking property is poor; when the number of picked down is less than 15, the anti-picking property is good; and when the number of picked down is less than 5, the anti-picking property is good. Through the test, the number of picked down of the fabric a-g is less than 5, and the anti-picking property is good.

[0073] The above examples only express several embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application.

Claims

1. Aerogel-modified anti-penetrating down feather and down fabric, characterized in that: The structure of the anti-drilling down feather down fabric comprises, from inside to outside, a unidirectional moisture-conducting base cloth layer, a hot melt adhesive mesh layer one, an aerogel modified functional layer, a hot melt adhesive mesh layer two and an anti-static surface layer; wherein the aerogel modified functional layer is prepared from raw materials in the following mass ratio: silica aerogel slurry: resin emulsion: magnetic powder = 4-6:1:0.2-0.6; The silica aerogel slurry is prepared from raw materials in the following mass percentage: silica aerogel powder 10-50%, eucalyptus oil 5-10%, sodium dodecyl sulfate 5-10%, and the balance being deionized water; The unidirectional moisture-conducting base cloth layer is composed of 50% polypropylene-50% cotton weft-knitted double-layer fabric, and the anti-static surface layer is composed of 100% polyester fabric.

2. Aerogel-modified drill-resistant down-proofing fabric according to claim 1, characterized in that: The resin emulsion is one or more of acrylic resin emulsion, EVA resin emulsion or epoxy resin emulsion.

3. A method for the production of a modified aerogel-based non-piercing down-proof wadding fabric according to any one of claims 1-2, characterized by: Specifically comprising the following steps: (1) preparing the aerogel modified functional layer, uniformly mixing the silica aerogel slurry, the resin emulsion and the magnetic powder to obtain a casting film slurry, coating the casting film slurry on a glass substrate, applying a magnetic field force in a spiral reciprocating vertical movement on the glass substrate for 30-60s, then standing for 30min, and drying at 40-100℃ for 1-3h to obtain the aerogel modified functional layer; (2) performing water-repellent treatment on the hydrophobic surface of the unidirectional moisture-conducting base cloth layer; (3) stacking the unidirectional moisture-conducting base cloth layer treated in step (2) with the hydrophilic surface facing up, in turn, the hot melt adhesive mesh layer one, the aerogel modified functional layer, the hot melt adhesive mesh layer two and the anti-static surface layer, and then performing hot pressing treatment to obtain the anti-drilling down feather down fabric based on aerogel modification.

4. The method for preparing aerogel-modified drill-proof down and feather fabric according to claim 3, characterized in that: In step (2), the specific steps of the water-repellent treatment are: first, cooking the unidirectional moisture-conducting base cloth layer at 100-120℃ for 30min, then immersing and padding in a water-repellent treatment liquid for 30min, bath ratio 1:20-30, rolling rate 70-75%, finally, pre-drying at 60°C for 15min, and baking at 100°C for 5min.

5. The method for preparing aerogel-modified drill-proof down and feather fabric according to claim 3, characterized in that: In step (3), the hot pressing temperature is 100-120℃, the hot pressing time is 120-150s, and the hot pressing pressure is 2-4MPa.

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