A moisture-absorbing and quick-drying fiber and its preparation method

Abstract

The present invention relates to the technical field of the preparation of functional fibers, and discloses a moisture-absorbing and quick-drying fiber and a preparation method thereof. The moisture-absorbing and quick-drying fiber of the present invention is a hybrid fiber, which is composed of cotton fiber and modified polyester fiber. Among them, the modified polyester fiber is prepared by the following steps: tertiary amine-modified nano-zinc oxide reacts with p-chloroaniline to obtain modified nano-zinc oxide; the modified nano-zinc oxide, aldehyde-group modified polybutylene terephthalate solution and diethylamine react to obtain modified polybutylene terephthalate, and the modified polybutylene terephthalate is melted, spun, stretched and shaped to obtain the modified polyester fiber. The moisture-absorbing and quick-drying fiber prepared by the present invention combines the advantages of cotton fiber and modified polyester fiber, has good quick-drying property, and excellent and durable moisture-absorbing ability.

Description

Technical Field

[0001] The present invention belongs to the technical field of functional fiber preparation, and particularly relates to a moisture-absorbing and quick-drying fiber and a preparation method thereof. Background Art

[0002] Cotton fibers in traditional cotton fabrics are hydrophilic and have very good moisture absorption performance. They are comfortable to wear when not sweating or sweating less. However, when the human body sweats a lot during exercise, the cotton fibers will expand due to moisture absorption, resulting in a decrease in air permeability and sticking to the human skin. At the same time, the diffusion rate of moisture in the fabric is slow, making it easier for sweat to accumulate in the fabric, causing a severe discomfort of wet and cold feeling to the human body. Although pure cotton fabrics can absorb a large amount of sweat, the sweat will be stored in the fabric and is difficult to discharge, greatly reducing the wearing comfort. Among chemical fibers, especially polyester, belongs to hydrophobic fibers, and the fibers themselves do not absorb moisture or absorb very little moisture. Moisture-absorbing properties can be achieved to a certain extent through physical, chemical modification or hydrophilic treatment of chemical fiber fabrics, as well as different weaving methods, etc. Capillary effect is common in fabrics, that is, chemical fiber fabrics absorb moisture along the gaps between fibers or yarns, and after the fabric absorbs water, it can quickly conduct the water to the outer surface of the clothing and diffuse radially around, so that the moisture in the fabric can be quickly evaporated, thus achieving the effect of reducing the temperature and humidity of the skin surface. At present, different types of fibers can be physically mixed in a certain proportion to form new fibers with new functions, but the effects of the fibers obtained in this way are not lasting. Especially under the influence of the concept of environmental protection, people prefer to use natural fibers such as cotton and linen, or environmentally friendly artificial fibers imitating cotton and linen. Moisture-absorbing and quick-drying fibers that combine the advantages of both will surely have a larger market. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a moisture-absorbing and quick-drying fiber and a preparation method thereof. The moisture-absorbing and quick-drying fiber prepared by the preparation process of the present invention has excellent moisture absorption performance and quick-drying functionality.

[0004] In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] A preparation method of a moisture-absorbing and quick-drying fiber comprises the following steps:

[0006] Mix cotton fibers and modified polyester fibers to obtain a moisture-absorbing and quick-drying fiber, and the moisture-absorbing and quick-drying fiber is a mixed fiber;

[0007] Wherein, the modified polyester fiber is prepared by the following steps:

[0008] Mix the modified nano-zinc oxide with an aldehyde-group modified poly(butylene terephthalate) solution, add diethylamine, and heat for reaction. After the reaction is completed, filter and dry to obtain modified poly(butylene terephthalate). Then melt it, spin, stretch, and shape to obtain modified polyester fibers;

[0009] Among them, the modified nano-zinc oxide is prepared by the following steps:

[0010] Step (1): Dissolve γ-(2,3-epoxypropoxy)propyltrimethoxysilane in an ethanol aqueous solution to obtain a silane hydrolysis solution. Disperse nano-zinc oxide in the silane hydrolysis solution, heat for reaction, filter, wash, and dry to obtain epoxy-modified nano-zinc oxide;

[0011] Step (2): Mix diethylamine, epoxy-modified nano-zinc oxide, and water, heat for reaction, filter, wash, and dry to obtain tertiary amine-modified nano-zinc oxide;

[0012] Step (3): Mix tertiary amine-modified nano-zinc oxide, p-chloroaniline, and ethanol, stir, and heat for reaction. After the reaction is completed, perform vacuum distillation to obtain modified nano-zinc oxide;

[0013] Among them, the aldehyde-group modified poly(butylene terephthalate) solution is prepared by the following steps:

[0014] Mix poly(butylene terephthalate) and a phenol-tetrachloroethane mixed solution, add copper powder, introduce oxygen, and heat for reaction. After the reaction is completed, filter and take the filtrate to obtain an aldehyde-group modified poly(butylene terephthalate) solution.

[0015] Preferably, the mass ratio of cotton fiber to modified polyester fiber is (10 - 20):(80 - 90).

[0016] Preferably, when preparing the modified polyester fiber, the mass ratio of modified nano-zinc oxide, aldehyde-group modified poly(butylene terephthalate) solution, and diethylamine is (10 - 18):(600 - 1200):(1 - 5).

[0017] Preferably, the mass ratio of nano-zinc oxide, γ-(2,3-epoxypropoxy)propyltrimethoxysilane, and ethanol aqueous solution is (30 - 70):200:(5000 - 8000); the reaction conditions are to react at 50 - 70 °C for 100 - 140 min; the drying conditions are to dry at 60 - 80 °C for 80 - 120 min.

[0018] Preferably, the mass ratio of epoxy-modified nano zinc oxide, diethylamine and deionized water is (20-40):(60-120):(500-900)280:75:(500-800); the reaction conditions are 20-40°C for 4-6h; and the drying conditions are 60-80°C for 60-100min.

[0019] Preferably, the mass ratio of tertiary amine modified nano zinc oxide, p-chloroaniline and ethanol is (8-16):(20-40):(600-1000); the reaction conditions are 30-50° C. for 2-4 hours.

[0020] Preferably, in the phenol-tetrachloroethane mixed solution, the mass ratio of phenol to tetrachloroethane is 3:2; and the oxygen introduction rate is 10-20 mL / min.

[0021] Preferably, the mass ratio of polybutylene terephthalate, phenol-tetrachloroethane mixed solution and copper powder is 100:(600-1200):(1-5); the reaction conditions are 70-90° C. for 1-2 hours.

[0022] Preferably, a moisture-absorbing and quick-drying fiber is prepared by the above-mentioned method for preparing a moisture-absorbing and quick-drying fiber.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The cotton fiber used in the present invention has obvious hygroscopic and skin-friendly properties, but poor quick-drying properties. Polyester fiber is a commonly used component in fabrics. The ester group contained in its structure makes it not resistant to strong alkali, easy to hydrolyze under high temperature conditions, has high strength and quick-drying properties, and is suitable for blending with other types of fibers. In the present invention, the addition of nano zinc oxide can improve the mechanical properties of polybutylene terephthalate to a certain extent. The dispersibility of nano zinc oxide is improved after modification, and it is evenly dispersed and not easy to agglomerate. The tertiary amine modified nano zinc oxide contains a hydrophilic group and reacts with p-chloroaniline to obtain modified nano zinc oxide. The amino group in the modified nano zinc oxide can be connected with the aldehyde group in the aldehyde-modified polybutylene terephthalate through a -C=N- bond, embedded in the chain, and the thermal stability is improved. The defects of the original polyester fiber are improved without changing its performance, so that it increases hygroscopicity and is durable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The present invention is a flow chart of preparing modified polyester fiber;

[0026] Figure 2 It is a bar graph of water absorption corresponding to samples 1-8 in the present invention. DETAILED DESCRIPTION

[0027] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0028] Embodiment 1

[0029] This embodiment provides a method for preparing a moisture-absorbing and quick-drying fiber, which is as follows:

[0030] Mix cotton fiber and modified polyester fiber according to a mass ratio of 10:90 to obtain a mixed fiber;

[0031] Among them, the preparation process of the modified polyester fiber is as follows:

[0032] Mix modified nano-zinc oxide with an aldehyde-group modified polybutylene terephthalate solution, add diethylamine, react at 90 °C for 6 h. After the reaction is completed, filter and dry at 80 °C for 120 min to obtain modified polybutylene terephthalate. Melt it at 230 °C, spin, stretch, and shape to obtain the modified polyester fiber;

[0033] The mass ratio of modified nano-zinc oxide, aldehyde-group modified polybutylene terephthalate solution and diethylamine is 10:600:1;

[0034] Among them, the preparation process of the modified nano-zinc oxide is as follows:

[0035] (1) Dissolve γ-(2,3-epoxypropoxy)propyltrimethoxysilane in an ethanol aqueous solution of 75 wt% to obtain a silane hydrolysis solution. Disperse nano-zinc oxide in the silane hydrolysis solution, react at 50 °C for 140 min. After the reaction is completed, filter and wash with ethanol 3 times, and dry at 60 °C for 120 min to obtain epoxy-modified nano-zinc oxide;

[0036] The mass ratio of nano-zinc oxide, γ-glycidyletheroxypropyltrimethoxysilane, and ethanol aqueous solution is 30:200:5000;

[0037] (2) Dissolve diethylamine in deionized water, add epoxy-modified nano-zinc oxide, react at 20 °C for 6 h, filter, wash with ethanol 3 times, and dry at 60 °C for 100 min to obtain tertiary amine-modified nano-zinc oxide;

[0038] The mass ratio of epoxy-modified nano-zinc oxide, diethylamine, and deionized water is 20:60:500;

[0039] Step (3): Mix tertiary amine-modified nano zinc oxide, p-chloroaniline and ethanol, stir at a rate of 400 r / min for 30 min, react at 30 °C for 4 h, and carry out vacuum distillation at 50 °C under 0.08 Mpa for 3 h to obtain modified nano zinc oxide;

[0040] The mass ratio of tertiary amine-modified nano zinc oxide, p-chloroaniline and ethanol is 8:20:600;

[0041] Among them, the preparation process of the aldehyde group-containing polybutylene terephthalate solution is as follows:

[0042] Mix polybutylene terephthalate and a phenol-tetrachloroethane mixed solution, add copper powder, introduce oxygen at a condition of 10 mL / min, react at 70 °C for 2 h, after the reaction ends, filter, take the filtrate to obtain the aldehyde group-containing polybutylene terephthalate solution;

[0043] The mass ratio of polybutylene terephthalate, the phenol-tetrachloroethane mixed solution and copper powder is 100:600:1.

[0044] Example 2

[0045] This example provides a preparation method of a moisture-absorbing and quick-drying fiber, which is as follows:

[0046] Mix cotton fiber and modified polyester fiber according to a mass ratio of 12:88 to obtain a mixed fiber;

[0047] Among them, the preparation process of the modified polyester fiber is as follows:

[0048] Mix modified nano zinc oxide with the aldehyde group-containing polybutylene terephthalate solution, add diethylamine, react at 95 °C for 5.5 h, after the reaction ends, filter, dry at 85 °C for 110 min to obtain modified polybutylene terephthalate, melt at 230 °C, spin, stretch and shape to obtain the modified polyester fiber;

[0049] The mass ratio of modified nano zinc oxide, the aldehyde group-containing polybutylene terephthalate solution and diethylamine is 12:750:2;

[0050] Among them, the preparation process of the modified nano zinc oxide is as follows:

[0051] (1) Dissolve γ-(2,3-epoxypropoxy)propyltrimethoxysilane in a 75 wt% ethanol aqueous solution to obtain a silane hydrolysis solution, disperse nano zinc oxide in the silane hydrolysis solution, react at 55 °C for 130 min, after the reaction ends, filter, wash with ethanol 3 times, and dry at 65 °C for 110 min to obtain epoxy-modified nano zinc oxide;

[0052] The mass ratio of nano-zinc oxide, γ-glycidoxypropyltrimethoxysilane, and ethanol aqueous solution is 40:200:5750;

[0053] (2) Dissolve diethylamine in deionized water, add epoxy-modified nano-zinc oxide, react at 25 °C for 5.5 h, filter, wash with ethanol 3 times, and dry at 65 °C for 90 min to obtain tertiary amine-modified nano-zinc oxide;

[0054] The mass ratio of epoxy-modified nano-zinc oxide, diethylamine, and deionized water is 25:75:600;

[0055] In step (3), mix tertiary amine-modified nano-zinc oxide, p-chloroaniline, and ethanol, stir at a rate of 500 r / min for 27 min, react at 35 °C for 3.5 h, and perform vacuum distillation at 0.08 Mpa and 50 °C for 3 h to obtain modified nano-zinc oxide;

[0056] The mass ratio of tertiary amine-modified nano-zinc oxide, p-chloroaniline, and ethanol is 10:25:700;

[0057] Among them, the preparation process of the aldehyde-group-containing polybutylene terephthalate solution is as follows:

[0058] Mix polybutylene terephthalate and a phenol-tetrachloroethane mixed solution, add copper powder, introduce oxygen at a rate of 10 mL / min, react at 75 °C for 1.8 h, after the reaction is completed, filter, and take the filtrate to obtain the aldehyde-group-containing polybutylene terephthalate solution;

[0059] The mass ratio of polybutylene terephthalate, phenol-tetrachloroethane mixed solution, and copper powder is 100:750:2.

[0060] Example 3

[0061] This example provides a method for preparing a moisture-absorbing and quick-drying fiber, which is specifically as follows:

[0062] Mix cotton fiber and modified polyester fiber according to a mass ratio of 15:85 to obtain a mixed fiber;

[0063] Among them, the preparation process of the modified polyester fiber is as follows:

[0064] Mix modified nano-zinc oxide with the aldehyde-group-containing polybutylene terephthalate solution, add diethylamine, react at 100 °C for 5 h, after the reaction is completed, filter, dry at 90 °C for 100 min to obtain modified polybutylene terephthalate, melt at 230 °C, spin, stretch, and shape to obtain the modified polyester fiber;

[0065] The mass ratio of modified nano-zinc oxide, aldehyde-group-containing polybutylene terephthalate solution, and diethylamine is 14:800:3;

[0066] Among them, the preparation process of the modified nano-zinc oxide is as follows:

[0067] (1) Dissolve γ-(2,3-epoxypropoxy)propyltrimethoxysilane in an ethanol aqueous solution of 75 wt% to obtain a silane hydrolysis solution. Disperse nano-zinc oxide in the silane hydrolysis solution, react at 60 °C for 120 min. After the reaction ends, filter, wash with ethanol three times, and dry at 70 °C for 100 min to obtain epoxy-modified nano-zinc oxide;

[0068] The mass ratio of nano-zinc oxide, γ-glycidyletheroxypropyltrimethoxysilane, and ethanol aqueous solution is 50:200:6500;

[0069] (2) Dissolve diethylamine in deionized water, add epoxy-modified nano-zinc oxide, react at 30 °C for 5 h, filter, wash with ethanol three times, and dry at 70 °C for 80 min to obtain tertiary amine-modified nano-zinc oxide;

[0070] The mass ratio of epoxy-modified nano-zinc oxide, diethylamine, and deionized water is 30:90:700;

[0071] In step (3), mix tertiary amine-modified nano-zinc oxide, p-chloroaniline, and ethanol, stir at a rate of 600 r / min for 24 min, react at 40 °C for 3 h, and carry out vacuum distillation at 0.08 Mpa and 50 °C for 3 h to obtain modified nano-zinc oxide;

[0072] The mass ratio of tertiary amine-modified nano-zinc oxide, p-chloroaniline, and ethanol is 12:30:800;

[0073] Among them, the preparation process of the aldehyde-group-containing polybutylene terephthalate solution is as follows:

[0074] Mix polybutylene terephthalate and a phenol-tetrachloroethane mixed solution, add copper powder, and introduce oxygen at a rate of 10 mL / min. React at 80 °C for 1.5 h. After the reaction ends, filter and take the filtrate to obtain an aldehyde-group-containing polybutylene terephthalate solution;

[0075] The mass ratio of polybutylene terephthalate, phenol-tetrachloroethane mixed solution, and copper powder is 100:900:3.

[0076] Example 4

[0077] This example provides a method for preparing a moisture-absorbing and quick-drying fiber, which is as follows:

[0078] Mix cotton fiber and modified polyester fiber according to a mass ratio of 17:83 to obtain a mixed fiber;

[0079] Among them, the preparation process of the modified polyester fiber is as follows:

[0080] Mix the modified nano-zinc oxide with the aldehyde-group-functionalized poly(butylene terephthalate) solution, add diethylamine, and react at 105 °C for 4.5 h. After the reaction, filter and dry at 95 °C for 90 min to obtain the modified poly(butylene terephthalate). Melt it at 230 °C, spin, stretch, and shape it to obtain the modified polyester fiber;

[0081] The mass ratio of the modified nano-zinc oxide, the aldehyde-group-functionalized poly(butylene terephthalate) solution, and diethylamine is 16:1050:4;

[0082] Among them, the preparation process of the modified nano-zinc oxide is as follows:

[0083] (1) Dissolve γ-(2,3-epoxypropoxy)propyltrimethoxysilane in an ethanol aqueous solution of 75 wt% to obtain a silane hydrolysis solution. Disperse nano-zinc oxide in the silane hydrolysis solution, react at 65 °C for 110 min. After the reaction, filter and wash with ethanol three times, and dry at 75 °C for 90 min to obtain epoxy-modified nano-zinc oxide;

[0084] The mass ratio of nano-zinc oxide, γ-glycidoxypropyltrimethoxysilane, and the ethanol aqueous solution is 60:200:7250;

[0085] (2) Dissolve diethylamine in deionized water, add epoxy-modified nano-zinc oxide, react at 35 °C for 4.5 h, filter, wash with ethanol three times, and dry at 75 °C for 70 min to obtain tertiary-amine-modified nano-zinc oxide;

[0086] The mass ratio of epoxy-modified nano-zinc oxide, diethylamine, and deionized water is 35:105:800;

[0087] In step (3), mix the tertiary-amine-modified nano-zinc oxide, p-chloroaniline, and ethanol, stir at a rate of 700 r / min for 21 min, react at 45 °C for 2.5 h, and carry out vacuum distillation at 0.08 Mpa and 50 °C for 3 h to obtain the modified nano-zinc oxide;

[0088] The mass ratio of the tertiary-amine-modified nano-zinc oxide, p-chloroaniline, and ethanol is 14:35:900;

[0089] Among them, the preparation process of the aldehyde-group-functionalized poly(butylene terephthalate) solution is as follows:

[0090] Mix poly(butylene terephthalate) with a phenol-tetrachloroethane mixed solution, add copper powder, and introduce oxygen at a rate of 20 mL / min. React at 85 °C for 1.3 h. After the reaction, filter and take the filtrate to obtain the aldehyde-group-functionalized poly(butylene terephthalate) solution;

[0091] The mass ratio of polybutylene terephthalate, phenol-tetrachloroethane mixed solution, and copper powder is 100:1050:4.

[0092] Example 5

[0093] This example provides a method for preparing moisture-absorbing and quick-drying fibers, which is as follows:

[0094] Mix cotton fibers and modified polyester fibers in a mass ratio of 20:80 to obtain mixed fibers;

[0095] Among them, the preparation process of the modified polyester fiber is as follows:

[0096] Mix modified nano-zinc oxide with an aldehyde-group-containing polybutylene terephthalate solution, add diethylamine, react at 110 °C for 4 h. After the reaction, filter and dry at 100 °C for 80 min to obtain modified polybutylene terephthalate. Melt it at 230 °C, spin, stretch, and shape to obtain the modified polyester fiber;

[0097] The mass ratio of modified nano-zinc oxide, aldehyde-group-containing polybutylene terephthalate solution, and diethylamine is 18:1200:5;

[0098] Among them, the preparation process of the modified nano-zinc oxide is as follows:

[0099] (1) Dissolve γ-(2,3-epoxypropoxy)propyltrimethoxysilane in an ethanol aqueous solution of 75 wt% to obtain a silane hydrolysis solution. Disperse nano-zinc oxide in the silane hydrolysis solution, react at 70 °C for 100 min. After the reaction, filter and wash with ethanol 3 times, dry at 80 °C for 80 min to obtain epoxy-modified nano-zinc oxide;

[0100] The mass ratio of nano-zinc oxide, γ-glycidyletheroxypropyltrimethoxysilane, and ethanol aqueous solution is 70:200:8000;

[0101] (2) Dissolve diethylamine in deionized water, add epoxy-modified nano-zinc oxide, react at 40 °C for 4 h, filter, wash with ethanol 3 times, dry at 80 °C for 60 min to obtain tertiary amine-modified nano-zinc oxide;

[0102] The mass ratio of epoxy-modified nano-zinc oxide, diethylamine, and deionized water is 40:120:900;

[0103] Step (3) Mix tertiary amine-modified nano-zinc oxide, p-chloroaniline, and ethanol, stir at a rate of 800 r / min for 18 min, react at 50 °C for 2 h, and perform vacuum distillation at 0.08 Mpa and 50 °C for 3 h to obtain modified nano-zinc oxide;

[0104] The mass ratio of tertiary amine-modified nano-zinc oxide, p-chloroaniline, and ethanol is 16:40:1000;

[0105] Among them, the preparation process of the aldehyde-functionalized polybutylene terephthalate solution is as follows:

[0106] Mix polybutylene terephthalate and a phenol-tetrachloroethane mixed solution, add copper powder, and introduce oxygen at a rate of 20 mL / min. React at 90 °C for 1 h. After the reaction is completed, filter and take the filtrate to obtain the aldehyde-functionalized polybutylene terephthalate solution;

[0107] The mass ratio of polybutylene terephthalate, the phenol-tetrachloroethane mixed solution, and copper powder is 100:1200:5.

[0108] Comparative Example 1

[0109] This comparative example provides a method for preparing a moisture-absorbing and quick-drying fiber, which is as follows:

[0110] Mix cotton fiber and modified polyester fiber in a mass ratio of 10:90 to obtain a moisture-absorbing and quick-drying fiber;

[0111] Among them, the preparation process of the modified polyester fiber is as follows:

[0112] Mix the modified nano-zinc oxide with the aldehyde-functionalized polybutylene terephthalate solution, dry at 80 °C for 120 min to obtain modified polybutylene terephthalate, melt at 230 °C, spin, stretch, and shape to obtain the modified polyester fiber;

[0113] The mass ratio of the modified nano-zinc oxide, the aldehyde-functionalized polybutylene terephthalate solution, and diethylamine is 10:600:1;

[0114] Among them, the preparation process of the modified nano-zinc oxide is as follows:

[0115] (1) Dissolve γ-(2,3-epoxypropoxy)propyltrimethoxysilane in a 75 wt% ethanol aqueous solution to obtain a silane hydrolysis solution. Disperse nano-zinc oxide in the silane hydrolysis solution, react at 50 °C for 140 min. After the reaction is completed, filter and wash with ethanol 3 times, then dry at 60 °C for 120 min to obtain epoxy-modified nano-zinc oxide;

[0116] The mass ratio of nano-zinc oxide, γ-glycidyletheroxypropyltrimethoxysilane, and the ethanol aqueous solution is 30:200:5000;

[0117] (2) Dissolve diethylamine in deionized water, add the epoxy-modified nano-zinc oxide, react at 20 °C for 6 h, filter, wash with ethanol 3 times, and dry at 60 °C for 100 min to obtain the modified nano-zinc oxide;

[0118] The mass ratio of epoxy-modified nano-zinc oxide, diethylamine, and deionized water is 20:60:500;

[0119] Among them, the preparation process of the aldehyde-functionalized poly(butylene terephthalate) solution is as follows:

[0120] Mix poly(butylene terephthalate) and a phenol-tetrachloroethane mixed solution, add copper powder, and introduce oxygen at a rate of 10 mL / min. React at 70 °C for 2 h. After the reaction is completed, filter and take the filtrate to obtain the aldehyde-functionalized poly(butylene terephthalate) solution;

[0121] The mass ratio of poly(butylene terephthalate), the phenol-tetrachloroethane mixed solution, and copper powder is 100:600:1.

[0122] Comparative Example 2

[0123] This comparative example provides a method for preparing a moisture-absorbing and quick-drying fiber, which is as follows:

[0124] Mix the modified cotton fiber and polyester fiber according to a mass ratio of 10:90 to obtain a moisture-absorbing and quick-drying fiber;

[0125] Among them, the preparation process of the modified cotton fiber is as follows:

[0126] Mix the moisture-absorbing and quick-drying finishing agent, cotton fiber, and deionized water according to a mass ratio of 30:20:500. At room temperature, immerse the cotton fiber in it for 3 h and dry it at 40 °C for 2 h to obtain the modified cotton fiber;

[0127] Among them, the preparation process of the moisture-absorbing and quick-drying finishing agent is as follows:

[0128] Mix the modified nano-zinc oxide with the aldehyde-functionalized poly(butylene terephthalate) solution, add diethylamine, and react at 90 °C for 6 h. After the reaction is completed, filter to obtain the moisture-absorbing and quick-drying finishing agent.

[0129] The mass ratio of the modified nano-zinc oxide, the aldehyde-functionalized poly(butylene terephthalate) solution, and diethylamine is 10:600:1;

[0130] Among them, the preparation process of the modified nano-zinc oxide is as follows:

[0131] (1) Dissolve γ-(2,3-epoxypropoxy)propyltrimethoxysilane in a 75 wt% ethanol aqueous solution to obtain a silane hydrolysis solution. Disperse nano-zinc oxide in the silane hydrolysis solution and react at 50 °C for 140 min. After the reaction is completed, filter and wash with ethanol 3 times, and dry at 60 °C for 120 min to obtain epoxy-modified nano-zinc oxide;

[0132] The mass ratio of nano-zinc oxide, γ-glycidyletheroxypropyltrimethoxysilane, and the ethanol aqueous solution is 30:200:5000;

[0133] (2) Dissolve diethylamine in deionized water, add epoxy-modified nano-zinc oxide, react at 20 °C for 6 h, filter, wash with ethanol three times, and dry at 60 °C for 100 min to obtain modified nano-zinc oxide;

[0134] The mass ratio of epoxy-modified nano-zinc oxide, diethylamine, and deionized water is 20:60:500;

[0135] Among them, the preparation process of the aldehyde-functionalized poly(butylene terephthalate) solution is as follows:

[0136] Mix poly(butylene terephthalate) and a phenol-tetrachloroethane mixed solution, add copper powder, and introduce oxygen at a rate of 10 mL / min, react at 70 °C for 2 h, after the reaction ends, filter, and take the filtrate to obtain an aldehyde-functionalized poly(butylene terephthalate) solution;

[0137] The mass ratio of poly(butylene terephthalate), the phenol-tetrachloroethane mixed solution, and copper powder is 100:600:1.

[0138] In the examples and comparative examples of the present invention, the poly(butylene terephthalate) used is from Changchun Engineering Plastics Co., Ltd., Taiwan, China, model: 1100-211M; the nano-zinc oxide is from Nanjing Baokete New Materials Co., Ltd., model: PZT-30, particle size: 30 nm; the diethylamine is from Shandong Jinyueyuan New Materials Co., Ltd., CAS number: 109-89-7; the p-chloroaniline is from Wuhan Chujiang Haoyu Chemical Technology Development Co., Ltd., CAS number: ; the ethanol is from Shandong Xingshi Chemical Sales Co., Ltd., CAS number: 64-17-5; the tetrachloroethane is from Shandong Jinyueyuan New Materials Co., Ltd., CAS number: 79-34-5.

[0139] Weave the moisture-absorbing and quick-drying fibers prepared in Examples 1-5 and Comparative Examples 1-2 into yarns respectively to obtain moisture-absorbing and quick-drying yarns as warp yarns, with a yarn count of 45S, use the moisture-absorbing and quick-drying yarns as weft yarns, with a yarn count of 35S, carry out weaving, with a horizontal density of 160 picks per inch and a vertical density of 70 ends per inch to obtain a moisture-absorbing and quick-drying fabric, corresponding to Specimens 1-8 respectively. Conduct moisture-absorbing and quick-drying performance tests on Specimens 1-8, referring to the standard GB / T21655.1-2008, see Table 1 for details;

[0140]

[0141] As can be seen from the test results in Table 1, the moisture absorption properties of Specimens 1-5 show a gradually increasing trend. This is mainly because the modified polyester fiber has both moisture absorption and quick-drying properties, while the quick-drying property of cotton fiber is much lower than that of the modified polyester fiber. Therefore, the evaporation rate of Specimens 1-5 shows a gradually decreasing trend. In Comparative Example 1, p-chloroaniline lacking chlorine and amino groups with water-absorbing groups cannot be embedded in polybutylene terephthalate, and its stability naturally decreases. The reduction of hydrophilic groups will reduce the moisture absorption property. Therefore, the moisture absorption property of Specimen 6 is lower than that of Specimen 1. Although the moisture absorption and quick-drying finishing agent in Specimen 7 treats the cotton fiber and increases the quick-drying property of the cotton fiber, the proportion of cotton fiber in the fabric is significantly lower than that of the modified polyester fiber. Therefore, the moisture absorption property of Specimen 7 will be lower than that of Specimen 1. It can be clearly seen from the test results in Table 1 that the quick-drying property of Specimens 1-8 is the best in Specimen 5, while the quick-drying property of Specimen 6 decreases compared with that of Specimen 1. At the same time, the moisture absorption and quick-drying finishing agent in Specimen 7 improves the quick-drying property of the cotton fiber, but the effect cannot match that of the polyester fiber. Therefore, the quick-drying property of Specimen 7 is better than that of Specimen 1.

[0142] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a moisture-absorbing and quick-drying fiber, characterized in that It includes the following steps: Mix cotton fibers and modified polyester fibers to obtain moisture-absorbing and quick-drying fibers; Among them, the modified polyester fibers are prepared by the following steps: Mix modified nano-zinc oxide with an aldehyde-group-containing polybutylene terephthalate solution, add diethylamine, react, after the reaction ends, filter and dry to obtain modified polybutylene terephthalate; Among them, the modified nano-zinc oxide is prepared by the following steps: Step (1): Dissolve γ-(2,3-epoxypropoxy)propyltrimethoxysilane in an ethanol aqueous solution to obtain a silane hydrolysis solution, disperse nano-zinc oxide in the silane hydrolysis solution, heat and react, filter, wash and dry to obtain epoxy-modified nano-zinc oxide; Step (2): Mix diethylamine, epoxy-modified nano-zinc oxide and deionized water, heat and react, filter, wash and dry to obtain tertiary-amine-modified nano-zinc oxide; Step (3): Mix tertiary-amine-modified nano-zinc oxide, p-chloroaniline and ethanol, stir, heat and react, after the reaction ends, carry out vacuum distillation to obtain modified nano-zinc oxide; The modified polybutylene terephthalate is melted, spun, stretched and shaped to obtain modified polyester fibers.

2. The preparation method of a moisture-absorbing and quick-drying fiber according to claim 1, characterized in that, The mass ratio of cotton fibers to modified polyester fibers is (10 - 20):(80 - 90).

3. The preparation method of a moisture-absorbing and quick-drying fiber according to claim 1, characterized in that, When preparing the modified polyester fibers, the mass ratio of modified nano-zinc oxide, aldehyde-group-containing polybutylene terephthalate solution and diethylamine is (10 - 18):(600 - 1200):(1 - 5).

4. The preparation method of a moisture-absorbing and quick-drying fiber according to claim 1, characterized in that, The aldehyde-group-containing polybutylene terephthalate solution is prepared by the following steps: Mix polybutylene terephthalate with a phenol-tetrachloroethane mixed solution, add copper powder, pass in oxygen, heat and react, after the reaction ends, filter and take the filtrate to obtain the aldehyde-group-containing polybutylene terephthalate solution.

5. The preparation method of a moisture-absorbing and quick-drying fiber according to claim 1, characterized in that, The mass ratio of nano-zinc oxide, γ-(2,3-epoxypropoxy)propyltrimethoxysilane and ethanol aqueous solution is (30 - 70):200:(5000 - 8000); the reaction condition is to react at 50 - 70 °C for 100 - 140 min; the drying condition is to dry at 60 - 80 °C for 80 - 120 min.

6. The preparation method of a moisture-absorbing and quick-drying fiber according to claim 1, wherein, The mass ratio of epoxy-modified nano-zinc oxide, diethylamine and deionized water is (20 - 40):(60 - 120):(500 - 900); the reaction condition is to react at 20 - 40 °C for 4 - 6 h; the drying condition is to dry at 60 - 80 °C for 60 - 100 min.

7. The preparation method of a moisture-absorbing and quick-drying fiber according to claim 1, characterized in that, The mass ratio of tertiary-amine-modified nano-zinc oxide, p-chloroaniline and ethanol is (8 - 16):(20 - 40):(600 - 1000); the reaction condition is to react at 30 - 50 °C for 2 - 4 h.

8. The preparation method of a moisture-absorbing and quick-drying fiber according to claim 4, characterized in that, In the phenol-tetrachloroethane mixed solution, the mass ratio of phenol to tetrachloroethane is 3:2; the oxygen inlet volume is 10 - 20 mL / min.

9. The preparation method of a moisture-absorbing and quick-drying fiber according to claim 4, wherein, The mass ratio of polybutylene terephthalate, phenol-tetrachloroethane mixed solution and copper powder is 100:(600 - 1200):(1 - 5); the reaction condition is to react at 70 - 90 °C for 1 - 2 h.

10. A moisture-absorbing and quick-drying fiber prepared by using the preparation method of a moisture-absorbing and quick-drying fiber according to any one of claims 1-9.

Images