阅读说明：本技术 基于碳纤维控制可调控感温变色面料及其制备方法 (Carbon fiber control-based adjustable thermochromic fabric and preparation method thereof ) 是由 彭雄义 张延� 陈卓 刘仰硕 王强 夏明桂 于泽浩 梁永红 杨锋 于 2019-11-28 设计创作，主要内容包括：本发明涉及基于碳纤维控制可调控感温变色面料及其制备方法,其特征是可调控感温变色面料由两层不同面料采用热压成型技术制备得到,两层面料分别为隔热层和感温变色层,其中,感温变色层由碳纤维和感温变色纤维混纺制得,隔热层由芳纶纤维面料经过涂层整理得到,感温变色层中的碳纤维通过导线连接可调控智能开关,可调控智能开关与电源模块连接。本发明的可调控感温变色面料的碳纤维层与可调控智能开关与电源模块依次连接,实现了颜色的可控调节。本发明的可调控感温变色面料的制备方法简单；本产品使用方便,易于推广。(The invention relates to an adjustable temperature-sensitive color-changing fabric based on carbon fiber control and a preparation method thereof, and is characterized in that the adjustable temperature-sensitive color-changing fabric is prepared by two layers of different fabrics by adopting a hot press molding technology, the two layers of fabrics are respectively a heat-insulating layer and a temperature-sensitive color-changing layer, wherein the temperature-sensitive color-changing layer is prepared by blending carbon fibers and temperature-sensitive color-changing fibers, the heat-insulating layer is prepared by aramid fiber fabrics through coating arrangement, carbon fibers in the temperature-sensitive color-changing layer are connected with an adjustable intelligent switch through leads, and the adjustable intelligent switch. The carbon fiber layer of the adjustable thermochromic fabric is sequentially connected with the adjustable intelligent switch and the power module, so that the color can be adjusted controllably. The preparation method of the adjustable thermochromic fabric is simple; the product is convenient to use and easy to popularize.)

1. The preparation method of the controllable thermochromic fabric based on carbon fiber control is characterized by comprising the following steps:

step one, preparing a temperature-sensitive color-changing layer: blending temperature-sensitive color-changing fibers serving as warp yarns and yarns of carbon fibers serving as weft yarns to prepare a temperature-sensitive color-changing layer;

step two, preparation of a heat insulation layer: selecting an aramid fiber fabric as a heat insulation layer fabric, performing coating finishing on the aramid fiber fabric by using a coating agent, tightening the aramid fiber fabric on a tightening frame, uniformly coating the coating agent on the aramid fiber fabric by using a scraper, drying at 90 ℃ for 2 minutes, and then baking at 140-170 ℃ for 3 minutes, wherein the coating weight is 20-25 g/m in dry weight²；

Step three, hot-press forming: hot-press molding the heat insulation layer (1) prepared in the step two and the temperature-sensitive color-changing layer (2) prepared in the step one to obtain a temperature-sensitive color-changing fabric;

step four, temperature control connection of the thermochromic fabric: carbon fiber in the temperature-sensitive color-changing layer is sequentially connected with the adjustable intelligent switch (4) and the power module (5) through the conducting wire (3), and the adjustable temperature-sensitive color-changing fabric based on carbon fiber control is manufactured.

2. The method for preparing the carbon fiber-based controllable thermochromic fabric according to claim 1, wherein the method for preparing the thermochromic fibers in the first step comprises the following steps:

101. preparing a spinning solution: weighing appropriate amount of L-polylactic acid with molecular weight of about 1.3 × 10⁵～5.3×10⁵(ii) a Dissolving temperature-sensitive color-changing color master batch and polylactic acid in a dimethylformamide solvent at the same time, wherein the mass ratio of the temperature-sensitive color-changing color master batch to the polylactic acid is 1: 15-25, continuously stirring in the dissolving process, and dissolving for 40-60 min until the prepared solution is a spinning solution with the mass concentration of 15-30%;

102. spinning polylactic acid fiber: carrying out electrostatic spinning on the spinning solution prepared in the step 101 on an electrostatic spinning machine, wherein the spinning conditions are as follows: the voltage is 7-15 KV, the injection speed is 4-6 mL/h, and the injection distance is 100-130 mm;

103. and (3) post-treatment: and (3) washing, oiling and drying the silk thread to obtain the thermochromic fiber.

3. The method for preparing the carbon fiber-based controllable thermochromic fabric according to claim 1, wherein the method for preparing the coating agent in the second step comprises: weighing sodium dodecyl benzene sulfonate, an octyl phenol polyoxyethylene ether O-4 emulsifier, acrylic acid, vinyl phosphate, butyl acrylate and ammonium persulfate, dissolving all the sodium dodecyl benzene sulfonate, the octyl phenol polyoxyethylene ether O-4 emulsifier, 1/3 total acrylic acid, vinyl phosphate, butyl acrylate and ammonium persulfate initiator in deionized water, uniformly stirring, controlling the temperature to be 75-85 ℃, and stirring for 1-2 hours; then dissolving the rest 2/3 acrylic acid, vinyl phosphate, butyl acrylate and ammonium persulfate initiator in deionized water, and then dropwise adding the deionized water into the continuously stirred mixed solution, controlling the dropwise adding time to be 2-3 h, and after the dropwise adding is finished, keeping the temperature for 2-3 h to obtain the polyacrylate emulsion coating agent; the mass ratio of the sodium dodecyl benzene sulfonate, the octyl phenol polyoxyethylene ether O-4 emulsifier, the acrylic acid, the vinyl phosphate, the butyl acrylate and the ammonium persulfate is as follows: (0.5-1) g, (1-2) g, (0.1-0.2) mol and (0.5-1) g.

4. The carbon fiber control-based controllable thermochromic fabric is characterized by being prepared by the carbon fiber control-based controllable thermochromic fabric preparation method of any one of claims 1-3.

Technical Field

The invention relates to a preparation method of a thermochromic fabric, in particular to an adjustable thermochromic fabric based on carbon fiber control and a preparation method thereof.

Background

With the rapid development of society, people have higher and higher requirements on the garment fabric, and the garment is expected to have a camouflage function besides warm keeping and heating. Thus, color-changing garments have begun to appear on the market, and the mechanism of color change of the garments is mainly caused by several external factors, such as: light, temperature, and ph, etc.

At present, among a plurality of color-changing clothes, the research reports of the color change of the temperature sensing clothes fabric are more, such as: chinese patent application No. 201810229374.9 discloses a thermochromic noctilucent fiber and a preparation method thereof, wherein the fiber is prepared by mixing a rare earth noctilucent material into a fiber raw material and performing wet spinning; zhang et al studied the temperature-induced color change mechanism of the color-changing polyester fabric prepared by the sol-microsphere method, and realized that the temperature-corresponding color-changing polyester fabric has sensitive and reversible color change performance (journal of textile, 2017, 38 (2): 117-122). Although these fibers or fabrics realize temperature-sensitive color change, the temperature of the fibers or fabrics is generated by external conditions, and the fibers or fabrics do not realize temperature adjustment. The color changing mode causes the limitation of quick color changing of the color changing fiber or fabric after the color changing fiber or fabric is made into clothes, because people hope that the clothes can change color at any time, and the invention has certain breakthrough in the field aiming at the requirement.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a carbon fiber control-based adjustable thermochromic fabric and a preparation method thereof.

The invention aims to provide a carbon fiber control-based adjustable thermochromic fabric which comprises a heat insulation layer 1 and a thermochromic layer 2, wherein the thermochromic layer 2 is prepared by blending carbon fibers and thermochromic fibers, the heat insulation layer 1 is prepared by coating aramid fiber fabric, the carbon fibers in the thermochromic layer 2 are connected with an adjustable intelligent switch 4 through a lead 3, the adjustable intelligent switch 4 is connected with a power module 5, and a schematic structural diagram of the carbon fiber control-based adjustable thermochromic fabric is shown in fig. 1.

The invention also aims to provide a preparation method of the controllable thermochromic fabric based on carbon fiber control, which comprises the following steps:

(1) preparing a temperature-sensitive color-changing layer: and (3) blending the temperature-sensitive color-changing fibers serving as warp yarns and the yarns of the carbon fibers serving as weft yarns to prepare the temperature-sensitive color-changing layer.

(2) Preparing a heat insulation layer: selecting an aramid fiber fabric as a heat insulation layer fabric, performing coating finishing on the aramid fiber fabric by using a coating agent, tightening the aramid fiber fabric on a tightening frame, uniformly coating the coating agent on the aramid fiber fabric by using a scraper, wherein the dry weight of the coating is 20-25 g/m²And drying at 90 ℃ for 2 minutes, and then baking at 140-170 ℃ for 3 minutes.

(3) Hot-press molding: and (3) carrying out hot press molding on the heat insulation layer prepared in the step (2) and the temperature-sensitive color-changing layer prepared in the step (1) to obtain the temperature-sensitive color-changing fabric.

(4) The temperature control of the temperature sensing color changing fabric is connected: and (3) sequentially connecting carbon fibers in the temperature-sensitive color-changing layer with the adjustable intelligent switch and the power module through the electric lead to prepare the adjustable temperature-sensitive color-changing fabric based on carbon fiber control.

The preparation method of the controllable thermochromic fabric based on carbon fiber control comprises the following steps of (1):

101. preparing a spinning solution: weighing appropriate amount of L-polylactic acid with molecular weight of about 1.3 × 10⁵～5.3×10⁵(ii) a Dissolving temperature-sensitive color-changing color master batch and polylactic acid in a dimethylformamide solvent simultaneously, preferably, the mass ratio of the temperature-sensitive color master batch to the polylactic acid is 1: 15-25; and continuously stirring in the dissolving process, wherein the dissolving time is 40-60 min until the prepared solution is a stable spinning solution with the mass concentration of 15-30%.

102. Spinning polylactic acid fiber: carrying out electrostatic spinning on the spinning solution prepared in the step 101 on an electrostatic spinning machine, wherein the spinning conditions are as follows: the voltage is 7-15 KV, the injection speed is 4-6 mL/h, and the injection distance is 100-130 mm.

103. And (3) post-treatment: and (3) washing, oiling and drying the silk thread to obtain the thermochromic fiber.

The invention discloses a preparation method of a controllable thermochromic fabric based on carbon fiber control, which comprises the following steps:

weighing a proper amount of sodium dodecyl benzene sulfonate, an octyl phenol polyoxyethylene ether O-4 emulsifier, acrylic acid, vinyl phosphate, butyl acrylate and ammonium persulfate, dissolving all the sodium dodecyl benzene sulfonate, the octyl phenol polyoxyethylene ether O-4 emulsifier, and 1/3 total amount of acrylic acid, vinyl phosphate, butyl acrylate and ammonium persulfate initiator in a proper amount of deionized water, uniformly stirring, controlling the temperature to be 75-85 ℃, and stirring for 1-2 hours; then dissolving the rest 2/3 acrylic acid, vinyl phosphate, butyl acrylate and ammonium persulfate initiator in a proper amount of deionized water, and then dropwise adding into the continuously stirred mixed solution, wherein the dropwise adding time is controlled to be 2-3 h, and after the dropwise adding is finished, keeping the temperature for 2-3 h to obtain the polyacrylate emulsion coating agent, wherein the emulsion is placed for one month without layering;

preferably, the mass volume ratio of the sodium dodecyl benzene sulfonate (g), the octyl phenol polyoxyethylene ether O-4 emulsifier (g), the acrylic acid (mol), the vinyl phosphate (mol), the butyl acrylate (mol) and the ammonium persulfate (g) is as follows: 0.5-1: 1-2: 0.1-0.2: 0.5-1.

The invention has the following remarkable characteristics:

(1) the integrally formed adjustable thermochromic fabric prepared by the invention is prepared by a two-layer fabric hot press forming method, and the two layers of fabrics respectively play different roles, wherein the thermochromic fabric layer positioned on the outer layer is mainly used for changing color, and the heat insulation layer positioned on the inner layer is mainly used for heat insulation.

(2) The carbon fiber layer of the adjustable thermochromic fabric is sequentially connected with the adjustable intelligent switch and the power module, so that the color can be adjusted controllably.

(3) The thermal insulation layer and the temperature-sensitive color-changing fabric layer of the adjustable temperature-sensitive color-changing fabric are connected into a whole by adopting a hot press molding method, and the preparation method is simple; the product is convenient to use and easy to popularize.

(4) According to the invention, the polylactic acid fiber has a thermochromic function by doping a thermochromic color master batch into polylactic acid and then adopting an electrostatic spinning technology; according to the invention, the aramid fiber fabric is coated with the coating agent by a coating finishing technology, and the coating agent contains a flame-retardant material, namely vinyl phosphate, so that the safe use of the thermochromic fabric is facilitated.

Drawings

FIG. 1 is a schematic structural diagram of an integrally formed adjustable thermochromic fabric (1. a thermal insulation layer; 2. a thermochromic fabric layer; 3. a lead; 4. an adjustable intelligent switch; 5. a power module);

FIG. 2 shows the schematic diagram of the electrospinning apparatus (1. power supply; 2. receiving shaft; 3. jet; 4. needle; 5. holder; 6. catheter; 7. polymer solution; 8. syringe; 9. propeller).

Detailed Description

The examples described below illustrate the invention in detail.