Moisture-absorbing breathable blended fabric and preparation method thereof

Abstract

The invention relates to the technical field of fabrics, and discloses a moisture-absorbing and breathable blended fabric and a preparation method thereof, the moisture-absorbing and breathable blended fabric comprises a modal / polyester blended fabric, an organosilicon chitosan finishing agent, an emulsifier and the like; according to the invention, the flexible silicone oil chain segment is arranged on the surface of the fabric, so that the flexibility of the fabric is obviously improved, and the anti-pilling grade and the softness value are increased. The organic silicon chitosan finishing agent contains a large number of hydrophilic hydroxyl groups, amino groups and sulfonic acid groups, the dripping diffusion time of the fabric can be shortened, the excellent hydrophilic moisture absorption performance is achieved, and meanwhile the high air permeability and air permeability are kept. The finishing agent contains a large number of sulfonic acid groups which form strong hydrogen-bond interaction with hydroxyl groups and the like of cellulose fibers in modal, so that the finishing agent is firmly attached to the surface of the fabric, and the water resistance is excellent.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fabrics, in particular to a moisture-absorbing and breathable blended fabric and a preparation method thereof. BACKGROUND

[0002] The main component of modal fabric is regenerated cellulose fiber, which has good moisture absorption, air permeability and gloss, but poor dimensional stability, easy deformation and pilling. The strength, elasticity and durability of polyester fabric are high, but the softness and moisture absorption are not good. Blending modal and polyester fibers can produce blended fibers with the advantages of both, which can be used to make high-grade clothing fabrics.

[0003] In order to give the fabric good softness, anti-pilling, moisture absorption and other properties, finishing agents need to be used to finish the fabric. Common finishing agents include polyurethane, silicone and natural polymer. Silicone finishing agent can give the fabric excellent softness, wrinkle resistance and anti-pilling performance, but the hydrophobicity of silicone finishing agent is strong, which is not conducive to improving the hydrophilic and moisture absorption performance of the fabric. Chitosan natural polymer derivative is cheap, easy to obtain, biocompatible, hydrophilic and has certain antibacterial performance, and has important application in finishing agents. Patent CN113005769B discloses a finishing agent composed of quaternary ammonium salt, water-soluble chitosan and honeysuckle extract, which can improve the wrinkle resistance of fiber fabric composed of modal, polyester and other fibers, but the problem of poor anti-pilling, hydrophilic and moisture absorption performance of the fabric is not solved. SUMMARY

[0004] In view of the shortcomings of the prior art, the present application solves the problem of poor anti-pilling performance of modal / polyester blended fabric, while maintaining good moisture absorption and air permeability.

[0005] The technical solution of the present application is a preparation method of a moisture-absorbing and breathable blended fabric:

[0006] (1) Add N,N-dimethylformamide, toluene, 3-allyloxy-2-hydroxy-1-propanesulfonic acid sodium salt aqueous solution to a reaction bottle containing a condenser and a water separator, heat and reflux to remove water, introduce nitrogen, add double-end hydrogen silicone oil and Karstedt catalyst, stir and react, then reduce pressure and distill, add the product to water, stir and centrifuge to remove the water phase, dry the oil phase to obtain propoxy-2-hydroxy-1-propanesulfonic acid sodium silicone oil. The reaction formula is:

[0007] .

[0008] (2) Add dimethyl sulfoxide and chitosan to the reaction flask, introduce nitrogen gas, stir and swell, add sodium propoxy-2-hydroxy-1-propanesulfonate silicone oil and hexamethylene diisocyanate, stir and react, filter after stirring, filter after stirring, wash the product with ethanol, dry, and obtain organosilicon chitosan finishing agent.

[0009] (3) Add organosilicon chitosan finishing agent and emulsifier to water, add glacial acetic acid, stir to make finishing solution, and perform two dips and two nips on modal / polyester blended fabric. After pre-drying, baking, washing and drying, moisture-absorbing and breathable blended fabric is obtained.

[0010] Preferably, the reaction in (1) is carried out at 80-90℃ for 2-3 hours.

[0011] Preferably, the ratio of sodium 3-allyloxy-2-hydroxy-1-propanesulfonate, bi-terminated silicone oil, and caster catalyst in (1) is (14.6-15.2)g:100g:(0.05-0.06)g.

[0012] Preferably, in (2), the ratio of chitosan, sodium propoxy-2-hydroxy-1-propanesulfonate-based silicone oil, and hexamethylene diisocyanate is 100g:(20-50)g:(1.2-3.2)g.

[0013] Preferably, the temperature during the stirring reaction in (2) is 75-85℃ and the reaction time is 4-7h.

[0014] Preferably, the emulsifier in (3) is an organosilicon-modified polyether.

[0015] Preferably, the ratio of water, organosilicon chitosan finishing agent and emulsifier in (3) is 1L:(10-25)g:(0.2-0.4)g.

[0016] Preferably, glacial acetic acid is added dropwise in (3) to adjust the pH of the solution to 5.5-6.

[0017] Preferably, in (3), the residual rate of the two dips and two rolls is 70-80%.

[0018] The beneficial technical effects of this invention are as follows: Sodium 3-allyloxy-2-hydroxy-1-propanesulfonate is added to the double-ended Si-H bonds of the double-ended hydrosilicone oil to obtain sodium propoxy-2-hydroxy-1-propanesulfonate-based silicone oil containing hydroxyl and sulfonic acid groups. Then, hexamethylene diisocyanate is used as a crosslinking agent to crosslink the double-ended hydroxyl groups of the silicone oil with the hydroxyl groups of chitosan to obtain an organosilicon chitosan finishing agent. Finally, the modal / polyester blended fabric is finished to apply the flexible silicone oil segments to the fabric surface, which significantly improves the fabric's softness, pilling resistance, and softness value.

[0019] The organosilicon chitosan finishing agent of the present invention contains a large number of hydrophilic hydroxyl, amino, urethane and sulfonic acid groups, which can reduce the drip diffusion time of the fabric, have excellent hydrophilic moisture absorption properties, and at the same time maintain high air permeability and breathability.

[0020] The finishing agent of this invention contains a large number of sulfonic acid groups, which form strong hydrogen bonds with the hydroxyl groups of cellulose fibers in modal, so that the finishing agent is firmly attached to the surface of the fabric and has excellent water resistance. Detailed Implementation

[0021] The embodiments of the present invention are described in detail below. These embodiments are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of the present invention is for the purpose of describing particular embodiments only and is not intended to limit the present invention.

[0022] Example 1: (1) Add 150 mL of N,N-dimethylformamide, 40 mL of toluene, and 18 mL of an aqueous solution containing 7.3 g of sodium 3-allyloxy-2-hydroxy-1-propanesulfonate to a reaction flask containing a condenser and a water separator. Heat to 140 °C, reflux to remove water, introduce nitrogen gas, add 50 g of double-ended hydrogen silicone oil and 0.03 g of caster catalyst (platinum catalyst, platinum content 5000 ppm), stir and react at 80 °C for 3 h, distill under reduced pressure, add the product to water, stir and centrifuge to remove the aqueous phase, dry the oil phase to obtain sodium propoxy-2-hydroxy-1-propanesulfonate-based silicone oil.

[0023] (2) Add 3L of dimethyl sulfoxide and 200g of chitosan to the reaction flask, purge with nitrogen, stir and swell at 85°C, add 40g of sodium propoxy-2-hydroxy-1-propanesulfonate silicone oil and 2.4g of hexamethylene diisocyanate, stir and react at 85°C for 4h, filter after stirring, wash the product with ethanol, dry, and obtain organosilicon chitosan finishing agent.

[0024] (3) Add 100g of organosilicon chitosan finishing agent and 2g of organosilicon modified polyether emulsifier to 10L of water, add glacial acetic acid to adjust the pH of the solution to 5.5, stir to make finishing solution, and perform two dips and two nips on modal / polyester blended fabric (the blending ratio of modal and polyester is 70:30, the same below), with a nips rate of 70%, pre-dry at 95℃ for 2min, bake at 150℃ for 2min, wash with water and dry at 90℃ to obtain moisture-wicking and breathable blended fabric.

[0025] Example 2: (1) Add 200 mL of N,N-dimethylformamide, 50 mL of toluene, and 19 mL of an aqueous solution containing 7.6 g of sodium 3-allyloxy-2-hydroxy-1-propanesulfonate to a reaction flask containing a condenser and a water separator. Heat to 140 °C, reflux to remove water, introduce nitrogen gas, add 50 g of double-ended hydrogen silicone oil (average molecular weight about 3000) and 0.025 g of caster catalyst, stir and react at 90 °C for 2 h, distill under reduced pressure, add the product to water, stir and centrifuge to remove the aqueous phase, dry the oil phase to obtain sodium propoxy-2-hydroxy-1-propanesulfonate-based silicone oil.

[0026] (2) Add 3L of dimethyl sulfoxide and 200g of chitosan to the reaction flask, introduce nitrogen gas, stir and swell at 85°C, add 70g of sodium propoxy-2-hydroxy-1-propanesulfonate silicone oil and 4.5g of hexamethylene diisocyanate, stir and react at 85°C for 5h, filter after stirring, wash the product with ethanol, dry, and obtain organosilicon chitosan finishing agent.

[0027] (3) Add 170g of organosilicon chitosan finishing agent and 2.8g of organosilicon modified polyether emulsifier to 10L of water, add glacial acetic acid to adjust the pH of the solution to 6, stir to make finishing solution, and perform two dips and two nips on modal / polyester blended fabric with a nips rate of 80%, pre-dry at 90℃ for 3min, bake at 140℃ for 2min, wash with water and dry at 80℃ to obtain moisture-wicking and breathable blended fabric.

[0028] Example 3: (1) Add 200 mL of N,N-dimethylformamide, 40 mL of toluene, and 18 mL of an aqueous solution containing 7.3 g of sodium 3-allyloxy-2-hydroxy-1-propanesulfonate to a reaction flask containing a condenser and a water separator. Heat to 130 °C, reflux to remove water, introduce nitrogen gas, add 50 g of double-ended hydrogen silicone oil and 0.028 g of caster catalyst, stir and react at 85 °C for 3 h, distill under reduced pressure, add the product to water, stir and centrifuge to remove the aqueous phase, dry the oil phase to obtain sodium propoxy-2-hydroxy-1-propanesulfonate-based silicone oil.

[0029] (2) Add 3.5L of dimethyl sulfoxide and 200g of chitosan to the reaction flask, purge with nitrogen, stir and swell at 75°C, add 100g of sodium propoxy-2-hydroxy-1-propanesulfonate silicone oil and 6.4g of hexamethylene diisocyanate, stir and react at 75°C for 7h, filter after stirring, wash the product with ethanol, dry, and obtain organosilicon chitosan finishing agent.

[0030] (3) Add 250g of organosilicon chitosan finishing agent and 4g of organosilicon modified polyether emulsifier to 10L of water, add glacial acetic acid to adjust the pH of the solution to 5.5, stir to make finishing solution, and perform two dip and two nib treatment on modal / polyester blended fabric with a nib rate of 75%. Pre-dry at 90℃ for 3min, bake at 160℃ for 1min, wash with water and dry at 90℃ to obtain moisture-wicking and breathable blended fabric.

[0031] Comparative Example 1 is an unfinished modal / polyester blended fabric.

[0032] Comparative Example 2:

[0033] (1) Add 3L of dimethyl sulfoxide and 200g of chitosan to the reaction flask, purge with nitrogen, stir and swell at 85°C, add 2.4g of hexamethylene diisocyanate, stir and react at 85°C for 4h, filter after stirring, wash the product with ethanol, dry, and obtain chitosan finishing agent.

[0034] (2) Add 100g of chitosan finishing agent and 2g of organosilicon modified polyether emulsifier to 10L of water, add glacial acetic acid to adjust the pH of the solution to 5.5, stir to make finishing solution, and perform two dip and two nib treatment on modal / polyester blended fabric with a nib rate of 70%, pre-dry at 95℃ for 2min, bake at 150℃ for 2min, wash with water and dry at 90℃ to obtain moisture-wicking and breathable blended fabric.

[0035] Comparative Example 3: (1) Add 3L of dimethyl sulfoxide to the reaction flask, introduce nitrogen gas, add 40g of sodium propoxy-2-hydroxy-1-propanesulfonate silicone oil and 2.4g of hexamethylene diisocyanate, stir at 85℃ for 4h, filter after stirring, wash the product with ethanol, dry, and obtain organosilicon finishing agent.

[0036] (2) Add 100g of silicone finishing agent and 2g of silicone modified polyether emulsifier to 10L of water, add glacial acetic acid to adjust the pH of the solution to 5.5, stir to make finishing solution, and perform two dips and two nips on modal / polyester blended fabric with a nips rate of 70%. Pre-dry at 95℃ for 2min, bake at 150℃ for 2min, wash with water and dry at 90℃ to obtain moisture-wicking and breathable blended fabric.

[0037] Comparative Example 4: (1) Add 150 mL of N,N-dimethylformamide, 40 mL of toluene, and 2.4 g of 3-butenol to a reaction flask containing a condenser and a water separator. Purge with nitrogen, add 50 g of double-ended hydrogen silicone oil and 0.03 g of caster catalyst, stir and react at 80 °C for 3 h, distill under reduced pressure, add the product to water, stir and centrifuge to remove the aqueous phase, and dry the oil phase to obtain butanol-based silicone oil.

[0038] (2) Add 3L of dimethyl sulfoxide and 200g of chitosan to the reaction flask, introduce nitrogen gas, stir and swell at 85°C, add 40g of butanol-based silicone oil and 2.4g of hexamethylene diisocyanate, stir and react at 85°C for 4h, filter after stirring, wash the product with ethanol, dry, and obtain organosilicon chitosan finishing agent.

[0039] (3) Add 100g of organosilicon chitosan finishing agent and 2g of organosilicon modified polyether emulsifier to 10L of water, add glacial acetic acid to adjust the pH of the solution to 5.5, stir to make finishing solution, and perform two dips and two nips on modal / polyester blended fabric with a nips rate of 70%, pre-dry at 95℃ for 2min, bake at 150℃ for 2min, wash with water and dry at 90℃ to obtain blended fabric.

[0040] Comparative Example 5: (1) 150 mL of N,N-dimethylformamide, 40 mL of toluene, and 4.8 g of sodium allyl sulfonate were added to a reaction flask containing a condenser and a water separator. Nitrogen gas was introduced, and 50 g of double-ended hydrogen silicone oil and 0.03 g of caster catalyst were added. The mixture was stirred at 80 °C for 3 h. The mixture was then distilled under reduced pressure. The product was added to water, stirred, and centrifuged to remove the aqueous phase. The oil phase was dried to obtain sodium propyl sulfonate-based silicone oil.

[0041] (2) Add 3L of dimethyl sulfoxide and 200g of chitosan to the reaction flask, introduce nitrogen gas, stir and swell at 85°C, add 40g of sodium propyl sulfonate silicone oil and 2.4g of hexamethylene diisocyanate, stir and react at 85°C for 4h, filter after stirring, wash the product with ethanol, dry, and obtain chitosan finishing agent.

[0042] (3) Add 100g of organosilicon chitosan finishing agent and 2g of organosilicon modified polyether emulsifier to 10L of water, add glacial acetic acid to adjust the pH of the solution to 5.5, stir to make finishing solution, and perform two dips and two nips on modal / polyester blended fabric (the blending ratio of modal and polyester is 70:30, the same below), with a nips rate of 70%, pre-dry at 95℃ for 2min, bake at 150℃ for 2min, wash with water and dry at 90℃ to obtain moisture-wicking and breathable blended fabric.

[0043] The anti-pilling performance of the fabric was tested according to GB / T 4802.3-2008. The softness of the fabric was tested using a Qinsun Q-FY type fabric softness tester; the higher the softness value, the softer the fabric. The air permeability of the fabric was tested according to GB / T 5453-1997. The water droplet diffusion time was tested according to GB / T 21655.1-2023. The fabric was washed and dried 20 times according to GB / T 8629-2017, and then the water droplet diffusion time was tested.

[0044] Table 1 Fabric Performance

[0045]

[0046] Compared to the modal / polyester blended fabric of Comparative Example 1, Examples 1-3, by using an organosilicon chitosan finishing agent to treat the blended fabric, applied flexible silicone oil segments to the fabric surface, significantly improving the fabric's softness. The anti-pilling grade reached 4-5, and the softness value increased markedly. Simultaneously, it maintained high air permeability, not significantly different from Comparative Example 1. Furthermore, the organosilicon chitosan finishing agent contains a large number of hydrophilic hydroxyl, amino, urethane, and sulfonic acid groups, which impart excellent hydrophilic and moisture-wicking properties to the fabric. The water droplet diffusion time is only 2.6-3.4 s. The finishing agent contains a large number of sulfonic acid groups, which form strong hydrogen bonds with the hydroxyl groups of the cellulose fibers in modal, allowing the finishing agent to firmly adhere to the fabric surface. This results in excellent water resistance; even after washing, the water droplet diffusion time remains low, with minimal increase.

[0047] Compared with Example 1, the finishing agent of Comparative Example 2 does not contain silicone oil structure, the anti-pilling grade of the blended fabric is only level 3, the softness value is lower than that of Example 1, and it does not contain sulfonic acid. The hydrogen bonding with the hydroxyl groups of cellulose fibers in Modal is weaker, the adhesion performance of the finishing agent is lower than that of Example 1, the water resistance of the finishing agent is poor, and the droplet diffusion time varies greatly after washing.

[0048] The silicone finishing agent in Comparative Example 3 does not contain chitosan structures, resulting in a long water droplet diffusion time and poor hydrophilic moisture absorption properties in the fabric. The water droplet diffusion time tends to decrease after washing, mainly because a small amount of hydrophobic silicone oil structures are washed away.

[0049] The butanol-based silicone oil and organosilicon chitosan finishing agent in Comparative Example 4 do not contain sulfonic acid groups, and their water diffusion time is significantly higher than that in Example 1. Furthermore, the water diffusion time varies considerably after washing, indicating poor water resistance.

[0050] Comparative Example 5, sodium propyl sulfonate-based silicone oil, does not contain hydroxyl groups and cannot undergo cross-linking reactions with hexamethylene diisocyanate and chitosan. After washing, the silicone oil in the chitosan finishing agent is removed by washing. The anti-pilling grade of the blended fabric after finishing is only level 3, and the softness value is lower than that of Example 1.

[0051] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A moisture-wicking and breathable blended fabric, characterized in that, The moisture-wicking and breathable blended fabric includes modal / polyester blended fabric, organosilicon chitosan finishing agent, emulsifier, and glacial acetic acid; The organosilicon chitosan finishing agent is prepared as follows: dimethyl sulfoxide and chitosan are added to a reaction flask, nitrogen gas is introduced, and the mixture is stirred to swell. Sodium propoxy-2-hydroxy-1-propanesulfonate silicone oil and hexamethylene diisocyanate are added, and the mixture is stirred to react. After stirring, the mixture is filtered, the product is washed, and dried to obtain the organosilicon chitosan finishing agent.

2. The moisture-wicking and breathable blended fabric according to claim 1, characterized in that, The emulsifier is an organosilicon-modified polyether.

3. The moisture-wicking and breathable blended fabric according to claim 1, characterized in that, The ratio of chitosan, sodium propoxy-2-hydroxy-1-propanesulfonate-based silicone oil, and hexamethylene diisocyanate is 100g:(20-50)g:(1.2-3.2)g.

4. The moisture-wicking and breathable blended fabric according to claim 1, characterized in that, The temperature during the stirring reaction is 75-85℃, and the reaction time is 4-7 hours.

5. The moisture-wicking and breathable blended fabric according to claim 1, characterized in that, The propoxy-2-hydroxy-1-propanesulfonate sodium-based silicone oil is prepared as follows: An aqueous solution of N,N-dimethylformamide, toluene, and sodium 3-allyloxy-2-hydroxy-1-propanesulfonate is added to a reaction flask containing a condenser and a water separator. The mixture is heated under reflux to remove water, nitrogen gas is introduced, and double-ended hydrogen silicone oil and a cassette catalyst are added. The mixture is stirred at 80-90°C for 2-3 hours, then distilled under reduced pressure. The product is added to water, stirred, and centrifuged to remove the aqueous phase. The oil phase is dried to obtain the propoxy-2-hydroxy-1-propanesulfonate sodium-based silicone oil.

6. The moisture-wicking and breathable blended fabric according to claim 5, characterized in that, The ratio of sodium 3-allyloxy-2-hydroxy-1-propanesulfonate, bipolar silicone oil, and cassiterite catalyst is (14.6-15.2) g: 100 g: (0.05-0.06) g.

7. A method for preparing a moisture-wicking and breathable blended fabric as described in any one of claims 1-6, characterized in that, The preparation method is as follows: add organosilicon chitosan finishing agent and emulsifier to water, add glacial acetic acid dropwise, stir to make finishing solution, perform two dips and two nips on modal / polyester blended fabric, pre-dry, bake, wash and dry to obtain moisture-wicking and breathable blended fabric.

8. The method for preparing the moisture-wicking and breathable blended fabric according to claim 7, characterized in that, The ratio of water, organosilicon chitosan finishing agent, and emulsifier is 1L:(10-25)g:(0.2-0.4)g.

9. The method for preparing the moisture-wicking and breathable blended fabric according to claim 7, characterized in that, The pH of the solution was adjusted to 5.5-6 by adding glacial acetic acid dropwise.

10. The method for preparing the moisture-wicking and breathable blended fabric according to claim 7, characterized in that, The residual rate of the two dips and two rolls is 70-80%.

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