CN114836986B

CN114836986B - Cold-feeling antibacterial fabric and preparation method thereof

Info

Publication number: CN114836986B
Application number: CN202210502644.5A
Authority: CN
Inventors: 李惠真
Original assignee: Shenzhen Chuhe Clothing Co ltd
Current assignee: Shenzhen Chuhe Clothing Co ltd
Priority date: 2022-05-09
Filing date: 2022-05-09
Publication date: 2023-09-08
Anticipated expiration: 2042-05-09
Also published as: CN114836986A

Abstract

The invention discloses a cool-feeling antibacterial fabric and a preparation method thereof. The preparation method of the cool-feeling antibacterial fabric comprises the following steps: coating isohexadecane and n-tetradecane with guanylthiourea resin to prepare a modified solution, adding purslane extracting solution, an adhesive and dye to obtain a functional solution, preprocessing cotton fibers with the functional solution, and preparing the cool antibacterial fabric through spinning, weaving, blank sizing, singeing, finished product sizing and quality control. Compared with the prior art, the cool-feeling antibacterial fabric prepared by the invention improves the utilization rate of dye, washing fastness and antibacterial performance, endows the fabric with contact cool feeling, and has good comfort and aesthetic property.

Description

Cold-feeling antibacterial fabric and preparation method thereof

Technical Field

The invention relates to the technical field of textile, in particular to a cool-feeling antibacterial fabric and a preparation method thereof.

Background

Functional textiles are beginning to be favored by consumers. One possible method of making cool textiles is to add microcapsules or to use the microcapsule process to finish the textile. Phase change materials have been used to produce temperature regulated textiles to enhance the thermal comfort of the wearer. These compounds have the ability to absorb and store a large amount of latent heat during heating and release this energy during cooling. When phase change materials are combined with textile fibers, they react to temperature changes in the human body and the outer garment layer.

Under the current microencapsulation technology conditions, the choice of the microencapsulation material for preparing the microencapsulated textile is mainly limited to normal alkanes. But the phase change of normal paraffins occurs at a narrow temperature change, resulting in a decrease in the phase change capability. Furthermore, the adhesion of microcapsules is closely related to the chemical nature and structure of the fabric carrier. Improper use can alter the properties of the fabric and it is difficult to maintain the durability, moisture permeability, elasticity and softness of the coated fabric. The traditional antibacterial fabric is formed by dyeing with acid and reactive dyes and then finishing with antibacterial and anti-inflammatory additives, and has the advantages of complex process, high cost and great skin irritation. The natural bactericide is widely applied to antibacterial finishing due to the characteristics of non-toxicity, environmental protection, antibacterial property, ultraviolet resistance, insect expelling and the like, but has poor durability, and functional components are easy to fall off in the washing process.

In order to enable the pure cotton fabric to have mercerized cool feeling, CN110295500A discloses a fabric finishing method for enabling the pure cotton fabric to have mercerized cool feeling, which specifically comprises the following steps: (1) preparing phase-change material microcapsules; (2) a transparent core mercerization process of pure cotton fabric; (3) preparation of the pure cotton mercerized cool fabric. According to the invention, a proper phase-change material microcapsule finishing agent is prepared by selecting a phase-change energy storage material, long-staple cotton fibers and common cotton fibers are used for preparing the grey cloth fabric in a trial mode, a 'core-penetrating mercerizing' process is adopted, so that the cotton fibers are fully swelled, the mercerizing effect advantage is obvious, and finally, the fabric is padded and finished through the phase-change material microcapsule finishing agent, so that the pure cotton fabric has a contact cool feeling function. In the summer fabric market, the pure cotton mercerized cool fabric can provide comfortable skin feeling for consumers, and simultaneously gives cool and smooth feeling to the consumers like tencel. However, the method adopts the mixture of liquid paraffin and octadecane as a core body, has poor phase change effect, is easy to fall off when no adhesive microcapsule is adopted, and has difficult guarantee effect.

The patent with publication number CN113235207A discloses a processing method of a natural cool-feeling antibacterial yarn-dyed summer sleeping mat fabric, which comprises the following processing procedures: the summer sleeping mat fabric processed by the processing method is a high-grade summer sleeping mat fabric, has elegant appearance, natural lasting cool feeling and antibacterial property, is cool but not icy, is permanently washable, breathable and moisture permeable, is suitable for people of all ages, and is easy to fold and store. After the mat fabric processed by the processing method is washed for 5 times, the antibacterial rate of staphylococcus aureus is more than or equal to 70%, and the antibacterial rate of escherichia coli is more than or equal to 70%; the shrinkage can be controlled within-3%; the contact cool feeling coefficient meets the requirements of GB/T35263-2017, and Qmax is more than or equal to 0.15J/m ² S. However, most of the methods adopt natural extract antibacterial agents, which have poor antibacterial durability and low wearing comfort.

The invention discovers that the polyurethane-based adhesive is most suitable for being connected with the guanylthiourea microcapsule, and in order to improve the phase change capability of the microcapsule, the phase change microcapsule is prepared by coating the isohexadecane and the n-tetradecane with the guanylthiourea resin. The purslane extract is adopted for fiber pretreatment, and the purslane contains phenolic acid, organic acid, flavonoid and alkaloid, and the components have strong biological characteristics. Natural dyes are organic macromolecules that generally have intermolecular binding ability (intermolecular forces or hydrogen bonds) with natural fibers. In order to improve the color fastness, purslane contains tannin and an ionic structure, consists of phenol groups and aromatic rings, can be combined with dye molecules to improve the dye uptake and enhance the antibacterial fastness.

Disclosure of Invention

In view of the defects of poor antibacterial property, low cool feeling and water-washing intolerance of the fabric in the prior art, the invention aims to solve the technical problems that guanylthiourea resin is adopted to coat the isohexadecane and the n-tetradecane to prepare phase-change microcapsules, the phase-change microcapsules and purslane extract are used for jointly processing cotton fibers, and then spinning, weaving and shaping are carried out to prepare the cool-feeling antibacterial fabric.

The preparation method of the cool-feeling antibacterial fabric comprises the following steps of:

step 1, pretreatment: soaking 1-3 parts of cotton fibers by 8-12 parts of 5-10 g/L sodium hydroxide aqueous solution, washing with water to be neutral, adding 15-25 parts of functional solution to perform soaking treatment on the cotton fibers for 8-12 hours; then adding 10-20 parts of sodium carbonate aqueous solution with the concentration of 0.1-0.3 g/L for reaction for 1-3 h; drying to obtain pretreated cotton fibers;

step 2, spinning: the pretreated cotton fibers prepared in the step 1 are subjected to the procedures of opening, carding, drawing and roving, and then are processed into core-spun yarns with nylon filaments by adopting a core-spun procedure;

step 3, weaving: weaving the core-spun yarn prepared in the step 2 into grey cloth by adopting a stitch structure through knitting;

step 4, shaping: and (3) performing blank setting, singeing, finished product setting and quality inspection on the grey cloth prepared in the step (3) to prepare the cool antibacterial fabric.

Preferably, the step 1 of drying is to comb the fibers, and the fibers are introduced with hot air at a speed of 0.4-0.8 m/min and a temperature of 70-85 ℃ for 10-30 min.

Preferably, the linear density of the core-spun yarn in the step 1 is 10-30 tex, and the twist factor of the core-spun yarn is 320-500.

Preferably, the nylon filament yarn linear density in the step 2 is 20-50D, and the mass ratio of the cotton fiber to the nylon filament yarn is 80:10 to 30 percent.

Preferably, the tissue structure in the step 3 is one of plain stitch tissue, rib stitch tissue, loop transfer tissue and tuck stitch tissue.

Preferably, the gram weight of the gray fabric in the step 3 is 160-180 g/m ² 。

Preferably, the blank parameters in the step 4 are: the temperature of the setting machine is 200-240 ℃, the speed of the machine is 30-40 m/min, and the rotating speed of the fan is 1200-1600 r/min.

Preferably, in the singeing step 3, the grey cloth is singed in a forward and reverse mode at a cloth speed of 60-80 m/min, a distance between the grey cloth and a reducing flame is 0.8-1.2 cm, a distance between the grey cloth and a copper plate is 0.5-0.8 cm, a distance between the grey cloth and a cylinder is 5-7 cm, and singeing stages are 4-5 stages, so that the singeing grey cloth is obtained.

Preferably, the shaping method of the finished product in the step 3 is as follows: the setting temperature is controlled at 130-160 ℃, the machine speed is 15-25 m/min, and the width of the setting blank is 150-300 cm.

Preferably, the preparation method of the functional solution comprises the following steps of:

adding 1-3 parts of modified solution, 0.3-0.8 part of purslane extract, 0.02-0.2 part of adhesive and 0.5-1 part of anhydrous sodium sulfate into 15-22 parts of water at 20-40 ℃, increasing the water temperature to 50-60 ℃ at the speed of 3-7 ℃/min, stirring and reacting for 10-20 min, stirring at the speed of 150-250 r/min, and adding 0.1-1 part of dye; then adding acetic acid to adjust the pH to 6.0-6.5, and preparing the functional solution.

Preferably, the adhesive is a polyurethane adhesive.

Preferably, the dye is alkaline rose essence.

The main active ingredients of herba Portulacae include a-linolenic acid, quercetin, p-coumaric acid, catechin and tannic acid. Quercetin molecules can be introduced with-OH and-OCH at 7 position and 4 position ₃ And (3) pigments, and promoting electron transfer and rearrangement. An increase in temperature will promote expansion of the cotton fibers; this facilitates further diffusion of dye molecules in the cotton fibers. When the temperature is increased, hydrocarbon bonds in the macromolecular structure of cotton fibers start to open, molecular chains among cotton fibers break, and fiber molecular gaps become large, which promotes tannins and catechin to bind with dye molecules, therebyIn the change of hydrogen bond, the-COO and-OH in the molecular chain of the natural dye are broken, so that the dye molecules are fused into the fiber, and the dye uptake is obviously improved. The reactivity between the dye and the cotton fibers is enhanced.

After dyeing, tannins and catechins are successfully dyed on cotton fibers due to the presence of quercetin. And because the components such as the a-linolenic acid, the quercetin, the coumarin, the catechin and the like have certain antibacterial capability. Quercetin inhibits DNA and RNA synthesis in bacterial cells and interferes with cell membrane activity. Coumarin acids have potent antibacterial activity against escherichia coli and staphylococcus aureus; it inhibits cell proliferation leading to apoptosis. The phenolic hydroxyl groups in catechin molecules are combined with peptide bonds, amino groups and carboxyl groups in bacterial cell membrane proteins, so that the membrane proteins are denatured, bacteria are further killed, and the antibacterial rate of the dyed cotton fibers is improved.

Preferably, the preparation method of the purslane extracting solution comprises the following steps of:

z1, cleaning 0.3 to 0.8 part of purslane with water for 1 to 2 times, and drying at 30 to 40 ℃; grinding the mixture to a sieve of 200-400 meshes to prepare powder;

and Z2, adding the powder prepared in the step Z1 into 1-3 parts of 85-95 wt% ethanol water solution, mixing, carrying out reflux extraction for 3-4 times at 60-70 ℃ for 2-3 hours each time, and filtering the extracting solution by using a microporous filter membrane with the thickness of 0.1-0.3 mu m after the reflux is finished to obtain the purslane extracting solution.

In order to impart cool feel properties to the fibrous facestock, we focus on the chemical and thermal properties of the microcapsules synthesized by in situ polymerization. The process of forming microcapsules containing phase change material is as follows: the mixture of isohexadecane and n-tetradecane is subjected to liquid-liquid dispersion in a mixed solution containing an amino prepolymer, a surfactant and water under acidic conditions. The dispersion of the mixture of isohexadecane and n-tetradecane in the mixed solution is a critical step in determining the final particle size distribution. In the dispersing step, the pH is adjusted to be acidic to lower the surface tension of the mixed solution, which reduces the molecular spacing between the surfactant molecules, thereby enhancing the emulsification. The mixture of isohexadecane and n-tetradecane is encapsulated by an amidinothiourea resin. The resulting core-shell microcapsules have a relatively uniform size and regular spherical shape.

For application to textiles, the mechanical and thermal stability of the microcapsules is one of the important properties to be considered. The increase in mechanical strength or heat treatment increases the likelihood of leakage of the core material, thereby reducing the thermal properties and heat storage capacity of the core material. In the reaction process, the heat treatment increases the crosslinking degree of the amidinothiourea resin through the condensation of hydroxymethyl groups. The microcapsule wall also maintains sufficient thickness and strength to maintain a spherical shape during washing, so that the microcapsule is not deformed and not fallen off under such mechanical strength.

Cool feeling refers to a psychological state satisfying a cool environment. The cool feel of the human body is affected by various parameters, which relate to the heat transfer between the skin and the environment. Wherein the thermal properties of the garment material play an important role. The cool feeling is related to the heat conductivity coefficient of the coating material, namely the wall material and the core material of the adhesive and the microcapsule.

Preferably, the preparation method of the modified solution comprises the following steps of:

s1, adding 0.05-0.2 part of fatty alcohol polyoxyethylene ether phosphate, 0.05-0.2 part of tween 40 and 0.6-0.7 part of 60-70 wt% of aqueous solution of guanylthiourea resin into 1.5-3 parts of water, regulating the pH value of the solution to 3-5 by using 8-12 wt% of aqueous solution of citric acid, and stirring for 8-15 min to prepare a reaction solution;

s2, adding 0.3-0.6 part of isohexadecane, 0.3-0.6 part of n-tetradecane and 0.01-0.06 part of tetraethyl orthosilicate into 1.5-3 parts of water, heating to 30-50 ℃, stirring and mixing for 20-40 min to obtain a mixed solution, adding the reaction solution prepared in the step S1 into the mixed solution, stirring for 10-30 min at the temperature of 30-50 ℃ at the speed of 10000-13500 r/min, then adjusting the pH value of the solution to 8-10 by using 40-60 wt% of triethanolamine solution, reducing the stirring speed to 600-1000 r/min, stirring for 3-5 h, and cooling to room temperature to obtain a modified solution.

In the present invention, the phase change material is encapsulated in microcapsules and then coated on the surface of cotton fiber to prevent leakage of the material during phase change. After being heated, the microcapsule can absorb heat energy, and is changed from solid state to liquid state, and a buffer-like cooling effect is generated in the fabric, which is commonly called contact cooling feeling. Under steady state conditions, the absorbed heat is not exactly the same due to the difference in thermal resistance and thermal conductivity at low temperatures of the adhesive. At this stage, the polyurethane adhesive can store heat, thereby playing a role in heat insulation; the fabric has a certain time delay in the reaction of cold-to-warm conversion, and the main characteristic is that the adhesive can delay the temperature rise. Second, when the temperature in the fabric reaches the phase transition temperature of the phase change material, the micro-phase change material may store more heat until a steady state is reached.

When the microcapsules are glued to cotton fibers, a short cooling effect is generated during the temperature rise of the fabric due to the synergistic effect of the glue and the microcapsules, and the heat change caused by the change of the environment is limited. The fabric can obtain good contact cool feeling.

Due to the adoption of the technical scheme, compared with the prior art, the preparation method of the cool-feeling antibacterial fabric has the advantages that: 1) The effective components of purslane and the basic rose dye are extracted to treat the fiber, so that the utilization rate, washing fastness and antibacterial property of the dye are improved. 2) The phase-change microcapsule is prepared by coating the isohexadecane and the n-tetradecane with the guanylthiourea resin, can produce a synergistic effect with the adhesive, and gives the fabric a contact cool feeling. 3) The cotton fibers are pretreated by adopting a scientific flow, spun, woven and post-treated, so that the fabric is endowed with good comfort and attractive appearance, and the cool feeling and the antibacterial property are improved.

Detailed Description

Example 1

A preparation method of cool-feeling antibacterial fabric comprises the following steps:

step 1, pretreatment: soaking 2kg of cotton fibers in 10kg of 2wt% sodium hydroxide aqueous solution, washing with water to be neutral, and adding 20kg of functional solution to perform dipping treatment on the cotton fibers for 10h; then adding 15kg of sodium carbonate aqueous solution with the concentration of 0.2g/L for reaction for 2 hours; carding the fibers, introducing hot air of 0.5m/min, and carding for 20min at 80 ℃ to obtain pretreated cotton fibers;

step 2, spinning: the pretreatment cotton fiber prepared in the step 1 is subjected to the working procedures of opening, carding, drawing and roving, and 30D nylon filaments are used as core wires, wherein the mass ratio of the cotton fiber to the nylon filaments is 80:20, adopting a core spun process to process into core spun yarns with the linear density of 20tex and the twist factor of 400;

step 3, weaving: the core-spun yarn prepared in the step 2 is knitted into a flat knitting structure by knitting, and the gram weight is 170g/m ² A grey cloth;

step 4, shaping: setting the gray fabric prepared in the step 3, singeing, shaping the finished product, and performing quality inspection, wherein the temperature of the setting is 220 ℃, the speed of the vehicle is 35m/min, and the rotating speed of a fan is 1400r/min; singeing the grey cloth in a forward and reverse mode at a cloth speed of 70m/min, wherein the distance between the grey cloth and a reducing flame is 1.0cm, the distance between the grey cloth and a copper plate is 0.7cm, the distance between the grey cloth and a cylinder is 6cm, and the singeing stage number is 4; the shaping temperature of the finished product is controlled at 140 ℃, the machine speed is 20m/min, the width of the shaped blank is 200cm, and the cool antibacterial fabric is prepared.

The preparation method of the functional solution comprises the following steps:

adding 2kg of modified solution, 0.5kg of purslane extract, 0.1kg of polyurethane adhesive and 0.8kg of anhydrous sodium sulfate into 18kg of 30 ℃ water, increasing the water temperature to 55 ℃ at the speed of 5 ℃/min, stirring and reacting for 15min, wherein the stirring speed is 200r/min, and adding 0.5kg of alkaline rose essence; then adding acetic acid to adjust the pH to 6.2 to obtain a functional solution;

the preparation method of the purslane extract comprises the following steps:

z1, cleaning 0.5kg of purslane with water for 2 times, and drying at 35 ℃; grinding into powder, and sieving with 300 mesh sieve to obtain powder;

and Z2, adding the powder prepared in the step Z1 into 2kg of 90wt% ethanol water solution, mixing, carrying out reflux extraction for 3 times at 65 ℃ for 2.5 hours each time, and filtering the extracting solution by using a 0.2 mu m microporous filter membrane after the reflux is finished to obtain the purslane extracting solution.

The preparation method of the modified solution comprises the following steps:

s1, adding 0.1kg of fatty alcohol polyoxyethylene ether phosphate, 0.1kg of Tween 40 and 0.63kg of 68wt% of aqueous solution of guanylthiourea resin into 2.2kg of water, adjusting the pH value of the solution to 4 by using 10wt% of aqueous solution of citric acid, and stirring for 10min to prepare a reaction solution;

s2, adding 0.48kg of isohexadecane, 0.48kg of n-tetradecane and 0.04kg of tetraethyl orthosilicate into 2kg of water, heating to 40 ℃, stirring and mixing for 30min to obtain a mixed solution, adding the reaction solution prepared in the step S1 into the mixed solution, stirring at the temperature of 40 ℃ for 20min at 12000r/min, then adjusting the pH of the solution to 9 by using 50wt% triethanolamine aqueous solution, reducing the stirring speed to 800r/min, stirring for 4h, and cooling to room temperature to obtain a modified solution.

Example 2

The preparation method of the cool-feeling antibacterial fabric is basically the same as that of the embodiment 1, and the only difference is that: the preparation methods of the modified solutions are different.

The preparation method of the modified solution comprises the following steps:

s1, adding 0.1kg of fatty alcohol polyoxyethylene ether phosphate and 0.1kg of tween 40 into 2.2kg of water, adjusting the pH value of the solution to 4 by using 10wt% of citric acid aqueous solution, and stirring for 10min to prepare a reaction solution;

Example 3

The preparation method of the modified solution comprises the following steps:

s2, adding 0.96kg of isohexadecane and 0.04kg of tetraethyl orthosilicate into 2kg of water, heating to 40 ℃, stirring and mixing for 30min to obtain a mixed solution, adding the reaction solution prepared in the step S1 into the mixed solution, stirring at 12000r/min for 20min at 40 ℃, then adjusting the pH of the solution to 9 by using 50wt% of triethanolamine aqueous solution, reducing the stirring speed to 800r/min, stirring for 4h, and cooling to room temperature to obtain a modified solution.

Example 4

The preparation method of the modified solution comprises the following steps:

s2, adding 0.96kg of n-tetradecane and 0.04kg of tetraethyl orthosilicate into 2kg of water, heating to 40 ℃, stirring and mixing for 30min to obtain a mixed solution, adding the reaction solution prepared in the step S1 into the mixed solution, stirring at 12000r/min for 20min at 40 ℃, then adjusting the pH of the solution to 9 by using 50wt% of triethanolamine aqueous solution, reducing the stirring speed to 800r/min, stirring for 4h, and cooling to room temperature to obtain a modified solution.

Example 5

The preparation method of the cool-feeling antibacterial fabric is basically the same as that of the embodiment 1, and the only difference is that: the preparation methods of the functional solutions are different.

adding 2kg of modified solution, 0.1kg of polyurethane adhesive and 0.8kg of anhydrous sodium sulfate into 18kg of 30 ℃ water, increasing the water temperature to 55 ℃ at a speed of 5 ℃/min, stirring for reaction for 15min, wherein the stirring speed is 200r/min, and adding 0.5kg of alkaline rose essence; then acetic acid was added to adjust the pH to 6.2 to obtain a functional solution.

The preparation method of the modified solution is the same as in example 1.

Comparative example 1

Adding 0.5kg of purslane extract, 0.1kg of polyurethane adhesive and 0.8kg of anhydrous sodium sulfate into 18kg of 30 ℃ water, increasing the water temperature to 55 ℃ at a speed of 5 ℃/min, stirring and reacting for 15min, wherein the stirring speed is 200r/min, and adding 0.5kg of alkaline rose essence; then acetic acid was added to adjust the pH to 6.2 to obtain a functional solution.

Comparative example 2

Adding 2kg of modified solution, 0.5kg of purslane extract and 0.8kg of anhydrous sodium sulfate into 18kg of water at 30 ℃, increasing the water temperature to 55 ℃ at the speed of 5 ℃/min, stirring and reacting for 15min, wherein the stirring speed is 200r/min, and adding 0.5kg of alkaline rose essence; then acetic acid was added to adjust the pH to 6.2 to obtain a functional solution.

The preparation method of the modified solution is the same as in example 1.

Comparative example 3

Adding 0.5kg of purslane extract and 0.8kg of anhydrous sodium sulfate into 18kg of water at 30 ℃, increasing the water temperature to 55 ℃ at the speed of 5 ℃/min, stirring for reaction for 15min, wherein the stirring speed is 200r/min, and adding 0.5kg of alkaline rose essence; then acetic acid was added to adjust the pH to 6.2 to obtain a functional solution.

Test example 1

Antibacterial property test

Antibacterial Properties reference GB/T20944.3-2008 section 3 evaluation of antibacterial Properties of textiles: the test was carried out using E.coli AATCC 8099, candida albicans AATCC 10231 and Staphylococcus aureus AATCC 6538 as test species and the bacterial culture solution without the test sample as control group. Three groups of samples were averaged and the test results are shown in table 2. The fabric antimicrobial properties were calculated using the following formula:

R＝(B-A)/B×100％

wherein R represents the antibacterial ratio, and A, B is the bacterial concentration of the sample and the control group, respectively.

Table 1 antibacterial property test results of fabrics

From the antibacterial property test results of the fabric, it can be seen that the antibacterial effect of example 1 is best, probably because the main active ingredients of purslane include a-linolenic acid, quercetin, p-coumaric acid, catechin and tannic acid. These ingredients have a certain antibacterial ability. Quercetin inhibits DNA and RNA synthesis in bacterial cells and interferes with cell membrane activity. Coumarin acids have potent antibacterial activity against escherichia coli and staphylococcus aureus; it inhibits cell proliferation leading to apoptosis. The phenolic hydroxyl groups in catechin molecules bind to peptide bonds, amino groups and carboxyl groups in bacterial cell membrane proteins, leading to denaturation of the membrane proteins and further bacterial death. And the increase in temperature promotes the expansion of the cotton fibers; quercetin molecules can be introduced with-OH and-OCH at 7 position and 4 position ₃ And (3) the pigment and the like promote electron transfer and rearrangement, which is beneficial to further diffusion of dye molecules and purslane extracts in cotton fibers. When the temperature rises, hydrocarbon bonds in the macromolecular structure of the cotton fibers start to open, molecular chains among the cotton fibers break, fiber molecular gaps become large, and due to the presence of quercetin, tannic acid compounds and catechin are promoted to combine with dye molecules, the reactivity between the dyeing agent and the cotton fibers is enhanced, and the antibacterial rate of the dyed cotton fibers is also improved.

Test example 2

Contact cool feeling test

The cooling sensation detection is tested according to the specification in GB/T35263-2017, detection and evaluation of the instant cooling sensation performance of textile contact. Each sample was tested three times and the test results are shown in table 2.

Table 2 results of fabric contact cool feel test

Experimental protocol	Instant contact cool feeling/(W cm-2)
		Example 1	0.251
Example 2	0.185
		Example 3	0.237
Example 4	0.231
		Example 5	0.249
Comparative example 1	0.164
		Comparative example 2	0.199
Comparative example 3	0.144

From the fabric contact cooling test results, the instant contact cooling of the example 1 is the best, the example 5 is slightly lower, and the comparative example 3 is the worst, probably because the cooling is related to the heat conductivity coefficient of the coating material, namely the wall material and the core material of the adhesive and the microcapsule. The phase change material is encapsulated in microcapsules and then coated on the surface of the cotton fiber to prevent leakage of the material during the phase change. Under steady state conditions, the absorbed heat is not exactly the same due to the difference in thermal resistance and thermal conductivity at low temperatures of the adhesive. At this stage, the polyurethane adhesive can store heat, thereby playing a role in heat insulation; the fabric has a certain time delay in the reaction of cold-to-warm conversion, and is mainly characterized in that when the microcapsules are glued to cotton fibers, a short cooling effect is generated in the process of increasing the temperature of the fabric due to the synergistic effect of the adhesive and the microcapsules, and the heat change caused by the change of the environment is limited. The fabric can obtain good contact cool feeling. Secondly, when the temperature in the fabric reaches the phase transition temperature of the phase transition material, the microcapsule can absorb and store heat energy, and the microcapsule is changed from solid state to liquid state, so that a buffer-like cooling effect is generated in the fabric, and the cooling effect is commonly called contact cooling feeling.

Test example 3

Soaping color fastness test

The test is carried out by referring to the test standard of GB/T3921-2008 "textile color fastness to soaping" test. Examples and comparative examples were sandwiched between two single fiber linered fabrics, one cotton fiber linered fabric and one wool linered fabric. Adding soap solution to raise the temperature to 50+/-2 ℃ and the bath ratio to be 50:1, covering the container, and washing for 30min by adopting a rinsing mode under the constant temperature condition of keeping the temperature of the solution to be 50+/-2 ℃. And after the test sample is finished, cleaning and drying the test sample, and comparing the gray sample card with the original test sample for evaluation. The test results are shown in Table 3.

TABLE 3 results of the soaping color fastness test

Experimental protocol	Grade
		Example 1	Grade 4
Example 2	3-4 grade
		Example 3	3-4 grade
Example 4	3-4 grade
		Example 5	2-3 grade
Comparative example 1	3-4 grade
		Comparative example 2	3 grade
Comparative example 3	3 grade

(higher grades indicate less fading in washing and better color fastness)

It can be seen from table 3 that the grade of example 1 is highest, the color fastness is best, probably due to the increase of temperature, the expansion of cotton fibers is promoted, hydrocarbon bonds in the macromolecular structure of the cotton fibers start to open, gaps among fiber molecules become large, further diffusion of dye molecules in the cotton fibers is facilitated, tannins and catechin-binding dye molecules are promoted due to the presence of quercetin, and-COO and-OH in the molecular chains of natural dyes are broken due to the change of hydrogen bonds, so that better fusion of dye molecules into fibers is promoted, and the dye uptake and color fastness are remarkably improved. And the added adhesive has a certain promotion effect on the adsorption and adhesion of dye molecules.

Claims

1. The preparation method of the cool-feeling antibacterial fabric is characterized by comprising the following steps of:

step 4, shaping: the grey cloth prepared in the step 3 is subjected to blank setting, singeing, finished product shaping and quality inspection to prepare cool antibacterial fabric;

the preparation method of the functional solution comprises the following steps of:

adding 1-3 parts of modified solution, 0.3-0.8 part of purslane extract, 0.02-0.2 part of adhesive and 0.5-1 part of anhydrous sodium sulfate into 15-22 parts of water at 20-40 ℃, increasing the water temperature to 50-60 ℃ at the speed of 3-7 ℃/min, stirring for 10-20 min at the stirring speed of 150-250 r/min, and adding 0.1-1 part of dye; then adding acetic acid to adjust the pH to 6.0-6.5, and preparing a functional solution;

the preparation method of the modified solution comprises the following steps of:

s2, adding 0.3-0.6 part of isohexadecane, 0.3-0.6 part of n-tetradecane and 0.01-0.06 part of tetraethyl orthosilicate into 1.5-3 parts of water, heating to 30-50 ℃, stirring and mixing for 20-40 min to obtain a mixed solution, adding the reaction solution prepared in the step S1 into the mixed solution, stirring for 10-30 min at the temperature of 30-50 ℃ at the speed of 10000-13500 r/min, then adjusting the pH value of the solution to 8-10 by using 40-60 wt% of triethanolamine solution, reducing the stirring speed to 600-1000 r/min, stirring for 3-5 h, and cooling to room temperature to obtain a modified solution;

the preparation method of the purslane extract comprises the following steps of:

z1, cleaning 0.3 to 0.8 part of purslane with water for 1 to 2 times, drying at 30 to 40 ℃, grinding and sieving with a 200 to 400-mesh sieve to prepare powder;

2. The method for preparing cool feeling antibacterial fabric as claimed in claim 1, which is characterized in that: and in the step 1, the fibers are carded, and hot air with the speed of 0.4-0.8 m/min and the temperature of 70-85 ℃ is introduced for carding for 10-30 min.

3. The method for preparing cool feeling antibacterial fabric as claimed in claim 1, which is characterized in that: the linear density of the core spun yarn in the step 2 is 10-30 tex, and the twist factor of the core spun yarn is 320-500.

4. The method for preparing cool feeling antibacterial fabric as claimed in claim 1, which is characterized in that: in the step 2, the linear density of the nylon filaments is 20-50D, and the mass ratio of the cotton fibers to the nylon filaments is 80:10 to 30 percent.

5. The method for preparing cool feeling antibacterial fabric as claimed in claim 1, which is characterized in that: the adhesive is polyurethane adhesive.

6. The method for preparing cool feeling antibacterial fabric as claimed in claim 1, which is characterized in that: the dye is alkaline rose essence.

7. The utility model provides a cool sense antibacterial surface fabric which characterized in that: the cool-feeling antibacterial fabric is prepared by a preparation method of the cool-feeling antibacterial fabric as claimed in any one of claims 1 to 6.