A thermal insulation polyester fabric based on titanium carbide and its preparation method

Abstract

The present invention relates to a titanium carbide-based thermal insulation polyester fabric and its preparation method. The thermal insulation polyester fabric can be produced by the following method: first, preparing a titanium sol; second, impregnating the polyester fabric with the titanium sol; third, placing the polyester fabric in the cavity of a plasma device, introducing acetylene gas, and reacting; and finally, washing and drying the polyester fabric to produce the thermal insulation polyester fabric. The polyester fabric produced by the present invention has an air permeability range of 869.0 to 895.5 mm / s and a Clo value range of 1.18 to 1.24. The polyester fabric produced by the present invention exhibits excellent thermal insulation performance without compromising breathability.

Description

Technical Field

[0001] The invention belongs to the technical field of preparation of polyester fabrics, and particularly relates to a titanium carbide-based thermal insulation polyester fabric and a preparation method thereof. Background Art

[0002] With the improvement of social living standards, the market demand for multifunctional textiles is increasing, among which textiles with thermal insulation function are becoming more and more popular among consumers.

[0003] With the ever-changing market demand for thermal fabrics, the landscape of thermal fabrics has undergone significant changes, both in terms of raw materials and fabric structure. In the past, thermal fabrics with interfills such as acrylic cotton, spray-bonded cotton batting, wool flannel batting, space cotton, metallic cotton, and plastic cotton were introduced, but these all suffered from various shortcomings and were gradually phased out. This has objectively driven the continuous development of new thermal fabrics, and thermal fabrics are evolving from simply providing warmth to providing comfort, functionality, health, warmth, and environmentally friendly options.

[0004] The greater the air volume contained in polyester fabric, the less heat is lost through conduction, and the better the insulation. However, air is a poor barrier to radiant heat; limiting heat radiation requires the fibers. Therefore, the fiber volume in thermal insulation materials must exceed a certain value to effectively reduce radiant heat loss. Another prerequisite for thermal insulation is to reduce air flow within their internal structure. Special fibers have a large surface area, and their surface friction effectively hinders air flow. Clearly, innovative thermal insulation fabrics should be developed based on the characteristics of different insulation materials, leveraging their complementary strengths.

[0005] Literature research reveals that Chinese invention patent application No. 201922278529.0 discloses a highly effective thermal insulation polyester dyed fabric. This invention enhances the thermal insulation performance of the fabric through the design of a thermal insulation cotton layer and a main lining. Furthermore, a nanofiber layer prevents cold air from passing through the fabric and affecting its warmth, thereby enhancing the fabric's high thermal insulation performance. However, this invention is still in the research and development stage, and large-scale production and widespread application will require considerable development. Currently, the development of thermal insulation polyester fabrics awaits further exploration and development. Summary of the Invention

[0006] The purpose of the present invention is to provide a thermal insulation polyester fabric based on titanium carbide and a preparation method thereof to solve the deficiencies in the prior art. The polyester fabric contains titanium carbide material, which can effectively generate heat under the influence of human body temperature, thereby realizing the thermal insulation function of the polyester fabric.

[0007] The object of the present invention is to provide a thermal insulation polyester fabric based on titanium carbide. The thermal insulation polyester fabric can be prepared by the following preparation method: first, preparing a titanium sol; second, impregnating the polyester fabric in the titanium sol; then, placing the polyester fabric in the cavity of a plasma device, introducing acetylene gas, and reacting; finally, washing and drying the polyester fabric to obtain the thermal insulation polyester fabric.

[0008] Another object of the present invention is to provide a method for preparing the above-mentioned warm-keeping polyester fabric based on titanium carbide, the preparation method comprising the following steps:

[0009] (1) Preparation of titanium sol: Titanium tetrachloride and isopropanol were weighed in a three-necked flask and reacted at 50-70°C for 3-5 hours to prepare titanium isopropoxide (Ti(O i C3H7)4); dissolving titanium isopropoxide in anhydrous ethanol to prepare a mixed solution a; dissolving an 8% by mass aqueous hydrochloric acid solution and deionized water in anhydrous ethanol to prepare a mixed solution b; adding the mixed solution b dropwise to the stirred mixed solution a for 1 to 3 hours. After the addition is complete, react for 1 to 2 hours to prepare a titanium sol.

[0010] Preferably, the volume ratio of the titanium tetrachloride (mL) and isopropyl alcohol (mL) is 1:10-20; the volume ratio of titanium isopropyl alcohol (mL) and anhydrous ethanol (mL) in the mixed solution a is 1:20-30; and the volume ratio of 8% by mass aqueous hydrochloric acid solution (mL), deionized water (mL) and anhydrous ethanol (mL) in the mixed solution b is 1:20-30:20-30.

[0011] (2) Impregnation: Immerse the polyester fabric in the titanium sol prepared in step (1) for 5 to 15 minutes, take it out and dry it at room temperature for 30 to 120 minutes for use.

[0012] Preferably, the dosage ratio of the polyester fabric to the titanium sol prepared in step (1) is 1 g: (10-20) mL.

[0013] (3) Reaction: Place the polyester fabric prepared in step (2) into the cavity of a plasma device, introduce acetylene gas, and remove the air therein; evacuate the cavity, adjust the pressure and temperature of the plasma device, and turn on the radio frequency discharge button of the plasma device; after the discharge is completed, take out the polyester fabric; wash and dry it to obtain a warm polyester fabric.

[0014] Preferably, the pressure of the plasma equipment cavity is 10-20 Pa, and the temperature is 120-140°C.

[0015] Preferably, the radio frequency power is 200-300W, and the discharge time is 60-90 minutes.

[0016] The present invention has the following notable features:

[0017] (1) Titanium carbide has a heating function, but its application in fabrics presents difficulties. The inventors of this application unexpectedly discovered that under plasma conditions, titanium sol reacts with acetylene to produce titanium carbide, thereby achieving the purpose of attaching titanium carbide to the surface of polyester fabrics, thereby achieving the purpose of heating and keeping warm in polyester fabrics. This discovery can achieve the purpose of attaching titanium carbide to the surface of fabrics without damaging polyester fabrics.

[0018] (2) The preparation of titanium carbide is somewhat difficult. The inventors of the present application unexpectedly discovered that under plasma conditions, zirconium sol and acetylene can undergo a chemical reaction to produce titanium carbide.

[0019] (3) The air permeability of the polyester fabric prepared by the present invention ranges from 869.0 to 895.5 mm / s, which is slightly lower than the air permeability of the polyester fabric before finishing and is within the normal range. The Kroger value of the polyester fabric prepared by the present invention ranges from 1.18 to 1.24, which is significantly higher than the Kroger value of the polyester fabric before finishing. After 10 washes, the Kroger value of the fabric does not decrease significantly, indicating that the polyester fabric prepared by the present invention has good thermal insulation performance without affecting the air permeability.

[0020] (4) The titanium carbide-containing polyester fabric prepared by the present invention has the characteristics of simple preparation method and wide source of raw materials, and has good application prospects. DETAILED DESCRIPTION

[0021] Main raw material sources: Unfinished polyester fabrics were purchased from Taizhou Santai Weaving Factory.

[0022] The following examples and comparative examples illustrate the present invention in detail.

[0023] Example 1

[0024] In this embodiment, a thermal insulation polyester fabric based on titanium carbide is prepared by the following method, comprising the following steps:

[0025] (1) Preparation of titanium sol: 1 mL of titanium tetrachloride and 15 mL of isopropanol were weighed in a three-necked flask and reacted at 60°C for 4 hours to obtain titanium isopropoxide (Ti(O i C3H7) 4); 10 mL of titanium isopropoxide was dissolved in 250 mL of anhydrous ethanol to prepare a mixed solution a; 1 mL of an 8% mass fraction of hydrochloric acid aqueous solution and 25 mL of deionized water were dissolved in 25 mL of anhydrous ethanol to prepare a mixed solution b; the mixed solution b was added dropwise to the stirred mixed solution a for 2 hours. After the addition was completed, the reaction was allowed to proceed for 1.5 hours to prepare a titanium sol.

[0026] (2) Impregnation: 10 g of polyester fabric was immersed in 150 mL of the titanium sol prepared in step (1) for 10 minutes, and then the fabric was taken out and dried at room temperature for 75 minutes for use.

[0027] (3) Reaction: Place the polyester fabric prepared in step (2) into the cavity of a plasma device, introduce acetylene gas, and remove the air therein; evacuate the cavity of the plasma device, adjust the pressure to 15 Pa, and the temperature to 130° C., turn on the radio frequency discharge button of the plasma device, set the radio frequency power to 250 W, and discharge for 75 minutes; after the discharge is completed, take out the polyester fabric; wash and dry it to obtain a warm polyester fabric.

[0028] Example 2

[0029] In this embodiment, a thermal insulation polyester fabric based on titanium carbide is prepared by the following method, comprising the following steps:

[0030] (1) Preparation of titanium sol: 1 mL of titanium tetrachloride and 10 mL of isopropanol were weighed in a three-necked flask and reacted at 50°C for 3 hours to obtain titanium isopropoxide (Ti(O i C3H7) 4); 10 mL of titanium isopropoxide was dissolved in 200 mL of anhydrous ethanol to prepare a mixed solution a; 1 mL of an 8% by mass aqueous hydrochloric acid solution and 20 mL of deionized water were dissolved in 20 mL of anhydrous ethanol to prepare a mixed solution b; the mixed solution b was added dropwise to the stirred mixed solution a for 1 hour, and the reaction was continued for 1 hour after the addition was completed to prepare a titanium sol.

[0031] (2) Impregnation: 10 g of polyester fabric was immersed in 100 mL of the titanium sol prepared in step (1) for 5 minutes, and then taken out and dried at room temperature for 30 minutes for use.

[0032] (3) Reaction: Place the polyester fabric prepared in step (2) into the cavity of a plasma device, introduce acetylene gas, and remove the air therein; evacuate the cavity of the plasma device, adjust the pressure of the cavity of the plasma device to 10 Pa, and the temperature to 120° C., turn on the radio frequency discharge button of the plasma device, set the radio frequency power to 200 W, and discharge for 60 minutes; after the discharge is completed, take out the polyester fabric; wash and dry it to obtain a warm polyester fabric.

[0033] Example 3

[0034] In this embodiment, a thermal insulation polyester fabric based on titanium carbide is prepared by the following method, comprising the following steps:

[0035] (1) Preparation of titanium sol: 1 mL of titanium tetrachloride and 20 mL of isopropanol were weighed in a three-necked flask and reacted at 70°C for 5 hours to obtain titanium isopropoxide (Ti(O iC3H7) 4); 10 mL of titanium isopropoxide was dissolved in 300 mL of anhydrous ethanol to prepare a mixed solution a; 1 mL of an 8% by mass aqueous hydrochloric acid solution and 30 mL of deionized water were dissolved in 30 mL of anhydrous ethanol to prepare a mixed solution b; the mixed solution b was added dropwise to the stirred mixed solution a for 3 hours, and the mixture was reacted for 2 hours after the addition was completed to prepare a titanium sol.

[0036] (2) Impregnation: 10 g of polyester fabric was immersed in 200 mL of the titanium sol prepared in step (1) for 15 minutes, and then taken out and dried at room temperature for 120 minutes for use.

[0037] (3) Reaction: The polyester fabric prepared in step (2) is placed in the cavity of a plasma device, acetylene gas is introduced, and the air therein is removed; vacuum is drawn, and the pressure of the plasma device cavity is adjusted to 20 Pa and the temperature is 140° C. The radio frequency discharge button of the plasma device is turned on, the radio frequency power is 300 W, and the discharge time is 90 minutes; after the discharge is completed, the polyester fabric is taken out; and the fabric is washed and dried to obtain a warm polyester fabric.

[0038] Comparative Example A

[0039] In contrast to Example 1, in this comparative example, the amount of titanium tetrachloride was reduced, that is, "1 mL titanium tetrachloride" in step (1) was changed to "0.1 mL titanium tetrachloride", and the other preparation methods were implemented according to the preparation method of Example 1.

[0040] Comparative Example B

[0041] In contrast to Example 1, in this comparative example, the drying time was increased, that is, the step (2) of "taking out and drying at room temperature for 75 minutes" was changed to "taking out and drying at room temperature for 75 hours," and the other preparation methods were implemented according to the preparation method of Example 1.

[0042] Comparative Example C

[0043] In contrast to Example 1, in this comparative example, the temperature of the plasma device cavity is lowered, that is, the step (3) of "regulating the pressure of the plasma device cavity to 15 Pa and the temperature to 130° C." is changed to "regulating the pressure of the plasma device cavity to 15 Pa and the temperature to 30° C.", and the other preparation methods are implemented according to the preparation method of Example 1.

[0044] Air permeability test:

[0045] In order to better test the air permeability of the polyester fabric prepared in the present invention, the polyester fabrics a, b, c, d, e, f and unfinished polyester fabrics (purchased from Taizhou Santai Weaving Factory) prepared in the above-mentioned specific examples 1 to 3 and comparative examples A to C of the present invention were selected; the amount of the selected fabric was 300 g / m2 Air permeability is tested according to GB / T5453-1997, with a sample size of 20mm x 22mm and a pressure of 100Pa. The test temperature is (20±2)°C and the humidity is (65±2)%. The test principle is to measure the vertical airflow rate through a given sample area over a certain period of time under a specified pressure differential. The air permeability R is calculated using the following formula.

[0046]

[0047] Where qv is the average airflow rate, A is the test area, and 167 is the conversion factor. The fabrics were washed according to the standard washing method in GB / T 20944.1-2007. The air permeability of the initial sample and the sample after 10 washes were tested. The test results are shown in Table 1.

[0048] Table 1 Air permeability of polyester fabrics a, b, c, d, e, f and unfinished polyester fabrics

[0049]

[0050] As shown in Table 1, the air permeabilities of polyester fabrics a, b, and c ranged from 869.0 to 895.5 mm / s, respectively, slightly lower than those of untreated polyester fabrics and within the normal range. After 10 washes, the air permeabilities of fabrics a, b, and c did not significantly increase. This indicates that the polyester fabrics prepared according to the present invention exhibit excellent air permeability. Polyester fabrics d, e, and f prepared in Comparative Examples AC also exhibited good air permeability, demonstrating that the amount of titanium tetrachloride used, the drying time, and the temperature of the plasma equipment cavity have little effect on the air permeability of the polyester fabrics.

[0051] Warmth test:

[0052] In order to better test the warmth retention of the polyester fabric prepared in the present invention, the polyester fabrics a, b, c, d, e, f and unfinished polyester fabrics (purchased from Taizhou Santai Weaving Factory) prepared in the above-mentioned specific examples 1 to 3 and comparative examples A to C of the present invention were selected; the amount of the selected fabric was 300 g / m 2. The warmth retention of the material was tested in accordance with GB / T11048-2008-T "Determination of thermal and moisture resistance of textiles under steady-state conditions for physiological comfort". Before the test, the sample was pre-humidified and conditioned in accordance with GB6529-86 "Standard for atmospheric environment of constant temperature and humidity chamber". The sample was conditioned in a constant temperature and humidity chamber for 24 hours, with a temperature of (20±2)°C and a humidity of (65±2)%. The sample size was 300mm×300mm, and the preheating time was 15 minutes. The fabric to be tested was subjected to standard washing according to the washing method of the washing color fastness tester GB / T20944.1-2007, and the warmth retention performance of the initial sample and the sample after washing 10 times was tested. The test results are shown in Table 2.

[0053] Table 2 Thermal insulation properties of polyester fabrics a, b, c, d, e, f and unfinished polyester fabrics

[0054]

[0055] As shown in Table 2, the Kroger values ​​of polyester fabrics a, b, and c ranged from 1.18 to 1.24, respectively, which are higher than those of the untreated polyester fabric. Even after 10 washes, the Kroger values ​​of fabrics a, b, and c remained unchanged. The higher the Kroger value, the better the warmth retention of the fabric. Therefore, it can be concluded that the polyester fabrics prepared by the present invention possess excellent warmth retention. The warmth retention of polyester fabrics d, e, and f prepared in Comparative Examples AC was slightly inferior to that of fabrics a, b, and c, indicating that the amount of titanium tetrachloride used, the drying time, and the temperature of the plasma equipment cavity all have a significant impact on the warmth retention of polyester fabrics.

[0056] Comprehensive analysis shows that the polyester fabric prepared by the present invention has good thermal insulation performance without affecting the air permeability.

Claims

1. A method for preparing a thermal insulation polyester fabric based on titanium carbide, characterized in that: The preparation method comprises the following steps: (1) Preparation of titanium sol: titanium tetrachloride and isopropanol were weighed in a three-necked flask and reacted at 50-70°C for 3-5 hours to obtain titanium isopropoxide; titanium isopropoxide was dissolved in anhydrous ethanol to obtain a mixed solution a; 8% by mass aqueous hydrochloric acid solution and deionized water were dissolved in anhydrous ethanol to obtain a mixed solution b; the mixed solution b was added dropwise to the stirred mixed solution a for 1-3 hours, and the mixture was reacted for 1-2 hours after the addition was completed to obtain titanium sol; (2) Impregnation: Impregnate the polyester fabric in the titanium sol prepared in step (1) for 5 to 15 minutes, take it out and dry it at room temperature for 30 to 120 minutes for use; (3) Reaction: Place the polyester fabric treated in step (2) into the cavity of the plasma equipment, introduce acetylene gas, and remove the air; Evacuate the cavity, adjust the pressure and temperature of the plasma equipment, and turn on the radio frequency discharge button of the plasma equipment; after the discharge is completed, take out the polyester fabric; wash and dry it to obtain the warm polyester fabric; The volume ratio of titanium tetrachloride to isopropanol in step (1) is 1: (10-20); the volume ratio of titanium isopropoxide to anhydrous ethanol in the mixed solution a is 1: (20-30); the volume ratio of 8% hydrochloric acid aqueous solution, deionized water and anhydrous ethanol in the mixed solution b is 1: (20-30): (20-30); The pressure of the plasma equipment cavity in step (3) is 10-20 Pa, and the temperature is 120-140°C.

2. The method for preparing a thermal insulation polyester fabric based on titanium carbide according to claim 1, characterized in that: The dosage ratio of the polyester fabric in step (2) to the titanium sol prepared in step (1) is 1 g: (10-20) mL.

3. The method for preparing a thermal insulation polyester fabric based on titanium carbide according to claim 1, characterized in that: The radio frequency power in step (3) is 200 to 300 W, and the discharge time is 60 to 90 minutes.

4. A thermal insulation polyester fabric based on titanium carbide, characterized in that: The invention is prepared by the method according to any one of claims 1 to 3.

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