Washable antibacterial deodorizing method for textile based on compounding of photocatalyst and weakly acidic substance

Abstract

The invention provides an antibacterial and deodorant method for textiles based on compounding of a photocatalyst and a weakly acidic substance. The method comprises the following steps: (1) mixing a photocatalyst, a weakly acidic substance and a selectively added reaction catalyst according to a predetermined mass ratio, and compounding to obtain a compound solution; (2) mixing the compound solution with an adhesive to obtain a padding solution; and (3) immersing a textile into the padding liquid, so that the padding liquid permeates into textile fibers, and drying and shaping to obtain the antibacterial textile. The method provided by the invention can effectively maintain the antibacterial and odor-removing functions of the textile before and after washing, and is environment-friendly, safe and durable.

Description

Technical Field

[0001] The invention relates to the field of textiles, and in particular to a method for washing-resistant, antibacterial and deodorizing textiles based on a compound of a photocatalyst and a weakly acidic substance. Background Art

[0002] With the upgrading of consumption and the increasing awareness of health, consumers pay more and more attention to the antibacterial, deodorizing and ammonia removal functions of textiles. Especially in the hot summer, people hope that textiles can suppress odors and avoid embarrassing situations in life. However, many textiles on the market that claim to have "antibacterial and deodorizing" functions are generally not resistant to washing, which has become a pain point for consumers. The importance of the antibacterial function of textiles is self-evident. In daily life, our skin will continue to secrete sweat and sebum, which are easy to become a breeding ground for bacteria. If textiles cannot effectively inhibit bacterial growth, a large amount of irritating gas, that is, odor, will be produced. In addition, some bacteria will decompose urea, higher fatty acids, sugars, proteins, etc. in sweat, further exacerbating the generation of odor. Therefore, textiles with antibacterial functions are of great significance for preventing pathogens and improving the comfort of textiles.

[0003] However, many antibacterial textiles do not perform well in terms of water resistance. Some textiles using quaternary ammonium antibacterial agents have a significantly reduced antibacterial effect after several washes because there is no direct chemical bond between the antibacterial agent and the textile.

[0004] Deodorization also faces similar problems. The odor on textiles often comes from the gas produced by bacteria decomposing organic matter. In order to eliminate these odors, many textiles use physical adsorption, chemical deodorization or biocatalytic deodorization technologies. However, the effects of these methods will gradually weaken after the textiles are washed many times.

[0005] Ammonia removal is an important indicator of textiles. Ammonia is a colorless gas with a strong pungent odor, which mainly comes from the decomposition of human sweat, urine and feces. In textiles, ammonia not only causes odor, but also may cause harm to human health. Therefore, textiles with ammonia removal function are also very popular in the market. However, in the same way, it is difficult for the post-finishing auxiliaries on the market to meet the requirements of textile ammonia removal and water resistance.

[0006] In summary, the problem of textiles not being resistant to washing in terms of antibacterial, deodorizing and ammonia removal functions is a pain point that needs to be solved urgently in the current market. In order to improve the durability and functionality of textiles, it is necessary to develop more stable and long-lasting antibacterial and deodorizing technologies. Summary of the invention

[0007] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. The present invention provides a method for treating textiles with water-resistant antibacterial and deodorizing properties, in particular, a method for treating textiles using a technology of compounding a photocatalyst with a weakly acidic substance, aiming to improve the antibacterial properties and ammonia removal effects of textiles before and after washing, thereby extending the service life of textiles, improving wearing comfort, and protecting human health. The method firmly combines the photocatalyst and the deodorizing functional group on the textile fibers through specific physical and chemical reactions, forming a protective layer with antibacterial and deodorizing functions, thereby making the textiles durable in antibacterial and deodorizing properties.

[0008] Specifically, the present invention provides the following technical solutions:

[0009] The first aspect of the present invention provides a method for washing-resistant antibacterial and deodorizing textiles, comprising:

[0010] (1) mixing the photocatalyst, the weakly acidic substance and the selectively added reaction catalyst according to a predetermined mass ratio to obtain a composite solution;

[0011] (2) mixing the compound liquid and the adhesive to obtain a padding liquid;

[0012] (3) Immersing the textile in the impregnation liquid so that the impregnation liquid penetrates into the interior of the textile fibers, and then drying and shaping the textile to obtain the antibacterial textile.

[0013] The provided method can effectively maintain the antibacterial and deodorizing functions of textiles before and after washing, and is environmentally friendly, safe, and durable.

[0014] According to an embodiment of the present invention, the above-mentioned method for antibacterial and deodorizing textiles may further include the following technical features:

[0015] According to an embodiment of the present invention, the photocatalyst is selected from at least one of titanium dioxide, zinc oxide, copper oxide and silver oxide.

[0016] According to an embodiment of the present invention, the particle size of the titanium dioxide, zinc oxide, copper oxide and silver oxide is 10-100 nm.

[0017] According to an embodiment of the present invention, the weakly acidic substance is selected from at least one of acetic acid, citric acid and biological acid.

[0018] According to an embodiment of the present invention, the reaction catalyst is selected from at least one of sodium hypophosphite and ammonium citrate.

[0019] According to an embodiment of the present invention, the photocatalyst is mixed in a predetermined mass ratio with a weakly acidic substance and a selectively added reaction catalyst in the form of a photocatalyst dispersion;

[0020] The photocatalyst dispersion liquid is obtained by mixing and dispersing a photocatalyst, a dispersant and water. The mass concentration of the photocatalyst dispersion liquid is 10 wt % to 30 wt %.

[0021] According to an embodiment of the present invention, the dispersant is selected from at least one of sodium polycarboxylate, sodium dodecyl sulfate, and propylene glycol.

[0022] According to an embodiment of the present invention, the mass ratio of the photocatalyst to the dispersant is 100:(1-10).

[0023] According to an embodiment of the present invention, the weakly acidic substance is added in the form of an aqueous solution of the weakly acidic substance, and the mass concentration of the weakly acidic aqueous solution is 20wt% to 40wt%.

[0024] According to an embodiment of the present invention, the photocatalyst dispersion liquid and the weakly acidic substance aqueous solution are mixed in a mass ratio of (1-5):1.

[0025] According to an embodiment of the present invention, the reaction catalyst is added in the form of a reaction catalyst aqueous solution, and the mass concentration of the reaction catalyst aqueous solution is 10wt% to 30wt%;

[0026] According to an embodiment of the present invention, the mass ratio of the aqueous solution of the weakly acidic substance to the aqueous solution of the reaction catalyst is (2-4):1.

[0027] According to an embodiment of the present invention, the adhesive is a polyurethane material, the solid content of the polyurethane material is 40% to 50%, and the mass ratio of the photocatalyst to the polyurethane material is (0.1 to 4):1.

[0028] The second aspect of the present invention provides a method for preparing a washable textile antibacterial and deodorizing agent, comprising:

[0029] (1) mixing a photocatalyst dispersion having a mass concentration of 10 wt% to 30 wt%, a weak acid substance aqueous solution having a mass concentration of 20 wt% to 40 wt%, and a reaction catalyst aqueous solution having a mass concentration of 10 wt% to 30 wt% in a predetermined mass ratio to obtain a composite solution;

[0030] The mass ratio of the photocatalyst dispersion liquid to the weakly acidic substance aqueous solution is (1-5):1;

[0031] The mass ratio of the weak acid substance aqueous solution to the reaction catalyst aqueous solution is (2-4):1;

[0032] The photocatalyst is selected from at least one of titanium dioxide, zinc oxide, copper oxide and silver oxide;

[0033] The weakly acidic substance is selected from at least one of acetic acid, citric acid and biological acid;

[0034] The reaction catalyst is selected from at least one of sodium hypophosphite and ammonium citrate;

[0035] (2) mixing the compound liquid and the adhesive to obtain a padding liquid;

[0036] The adhesive is a polyurethane material, the solid content of the polyurethane material is 40% to 50%, and the mass ratio of the photocatalyst to the polyurethane material is (0.1 to 4):1;

[0037] (3) Immersing the textile in the impregnation liquid so that the impregnation liquid penetrates into the interior of the textile fibers, and then drying and shaping the textile to obtain the antibacterial textile.

[0038] According to an embodiment of the present invention, the antibacterial textile has an antibacterial rate of at least 90% before washing or after 10 to 50 washings, and a deodorization rate of more than 70%.

[0039] According to an embodiment of the present invention, the textile is selected from at least one of clothing, household items, towels, slippers, and automobile interiors.

[0040] The beneficial effects achieved by the present invention are at least:

[0041] (1) The method provided by the present invention is used to perform antibacterial and deodorizing effects on textiles, and the effect is remarkable. The present invention utilizes the synergistic effect of photocatalyst and weak acidic substance to effectively improve the antibacterial performance and deodorizing effect of textiles, inhibit bacterial growth, decompose harmful gases such as ammonia, and improve the wearing environment. Moreover, by further compounding the reaction catalyst, the antibacterial performance and deodorizing effect of textiles can be further improved.

[0042] (2) The raw materials used in the present invention are environmentally friendly and safe. The raw materials used are non-toxic, harmless, and environmentally friendly materials that are harmless to the human body, and no harmful substances are discharged during the processing process, which meets environmental protection requirements.

[0043] (3) The antibacterial and deodorizing method provided by the present invention is durable. Through a specific chemical reaction, the photocatalyst and weak acid are firmly combined on the textile fiber to form a durable protective layer that is not easy to fall off or fail, thereby extending the service life of the textile. After 10 to 50 washes, the antibacterial and deodorizing effects are still obvious.

[0044] (4) The method provided by the present invention has a wide range of applications. The present invention is applicable to various types of textiles, such as clothing, household items, towels, slippers, automobile interiors, etc., and has a wide range of application prospects. DETAILED DESCRIPTION

[0045] Embodiments of the present invention are described in detail below. The embodiments are exemplary and intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0046] The present invention provides a method for washing-resistant antibacterial and deodorizing textiles, comprising:

[0047] (1) mixing the photocatalyst, the weakly acidic substance and the selectively added reaction catalyst according to a predetermined mass ratio to obtain a composite solution;

[0048] (2) mixing the compound liquid and the adhesive to obtain a padding liquid;

[0049] (3) Immersing the textile in the impregnation liquid so that the impregnation liquid penetrates into the interior of the textile fibers, and then drying and shaping the textile to obtain the antibacterial textile.

[0050] The present invention selects a photocatalyst and a weak acidic substance as the main raw material for antibacterial and deodorizing, and improves the antibacterial performance and deodorizing effect of the textiles before and after washing when treating the textiles. Taking zinc oxide as a photocatalyst as an example, it has good antibacterial performance and photocatalytic activity, and can decompose harmful gases such as ammonia; citric acid is taken as a weak acidic substance as an example, which has ammonia removal and chelating effect, can combine with metal ions in textile fibers, improve the water washing resistance of the textiles, and improve the stability of the antibacterial and ammonia removing agent.

[0051] When deodorizing textiles, only relying on weak acidic substances can also achieve the effect of deodorizing, such as removing ammonia, but this effect is not long-lasting. In particular, the deodorizing effect will deteriorate after the textiles are washed. The antibacterial textiles formed by the present invention through the compounding of weak acidic substances and photocatalysts, which will be complexed, glued by adhesives, and impregnated can deodorize and resist bacteria for a long time, and the effect will not change significantly after multiple washings.

[0052] The photocatalyst mentioned is a nano photocatalyst, for example, with a particle size of less than 300 nanometers, less than 200 nanometers, and preferably less than 100 nanometers. According to a specific embodiment, the photocatalyst is selected from at least one of titanium dioxide, zinc oxide, copper oxide, and silver oxide. According to a preferred embodiment, the photocatalyst includes at least two of titanium dioxide, zinc oxide, copper oxide, and silver oxide. According to a more preferred embodiment, the photocatalyst includes titanium dioxide and one selected from zinc oxide, copper oxide, and silver oxide.

[0053] The photocatalyst mentioned is mixed in the form of a photocatalyst dispersion with a weakly acidic substance and a selectively added reaction catalyst in a predetermined mass ratio;

[0054] The photocatalyst dispersion liquid is obtained by mixing and dispersing a photocatalyst, a dispersant and water, and the mass concentration of the photocatalyst dispersion liquid is 10wt% to 30wt%. The dispersant mentioned above accounts for 10wt% to 20wt% of the mass concentration of the photocatalyst dispersion liquid.

[0055] According to an embodiment of the present invention, the dispersant is selected from at least one of polycarboxylate sodium salt, sodium dodecyl sulfate, and propylene glycol. According to a preferred embodiment, the dispersant includes polycarboxylate sodium salt and sodium dodecyl sulfate, and the mass ratio of the two is 1:1.

[0056] The weak acid substance mentioned here refers to an acid that is not completely ionized in the solution, and its pH value is lower than 7 and higher than 3. According to a specific embodiment, the weak acid substance is selected from at least one of acetic acid, citric acid and biological acid. The weak acid substance is added in the form of an aqueous solution of the weak acid substance, and the mass concentration of the weak acid aqueous solution is 20wt% to 40wt%.

[0057] The reaction catalyst can be added according to the situation. The addition of the reaction catalyst can further improve the antibacterial effect and deodorizing effect of the textile. The reaction catalyst mentioned is selected from at least one of sodium hypophosphite and ammonium citrate. The reaction catalyst is added in the form of a reaction catalyst aqueous solution, and the mass concentration of the reaction catalyst aqueous solution is 10wt% to 30wt%.

[0058] According to a specific embodiment, the photocatalyst dispersion liquid and the weak acidic substance aqueous solution are mixed in a mass ratio of (1-5): 1. According to a specific embodiment, the photocatalyst dispersion liquid and the weak acidic substance aqueous solution are mixed in a mass ratio of 1:1, 2:1, 3:1, 4:1 or 5:1.

[0059] According to a specific implementation, the mass ratio of the aqueous solution of the weakly acidic substance to the aqueous solution of the reaction catalyst is (2-4):1.

[0060] The textile to be treated is immersed in the compound liquid, and the compound liquid is uniformly infiltrated into the textile fibers by dipping, padding, etc. Then, the compound liquid is solidified on the textile fibers by heating, drying or natural drying to form a protective layer with antibacterial and deodorizing properties, thereby obtaining antibacterial textiles.

[0061] Antibacterial textiles may also be subjected to post-treatment processes such as washing and shaping to improve their appearance quality and wearing comfort. At the same time, the antibacterial and deodorizing performance of the treated textiles is tested to ensure that they meet the predetermined technical indicators.

[0062] The deodorization mentioned in this article mainly includes the removal of ammonia, acetic acid, and isovaleric acid.

[0063] The technical scheme of the present invention is described below by specific examples. It should be noted that these examples are only used to facilitate the understanding of those skilled in the art and should not be regarded as limiting the scope of protection of the present invention. Unless otherwise specified, the reagents used in the examples can be obtained commercially.

[0064] Example 1

[0065] Embodiment 1 Antibacterial and deodorizing treatment of textiles is carried out by the following method, comprising:

[0066] (1) selecting high-purity titanium dioxide powder with a porous core-shell structure, a dispersant (sodium polycarboxylate and sodium dodecyl sulfate, the mass ratio of the two is 1:1), and deionized water, and dispersing them in a high-speed disperser for 60 minutes to prepare a 10 wt% nano core-shell titanium dioxide dispersion A, wherein the dispersant accounts for 0.3 wt% of the mass concentration of the dispersion A;

[0067] Food grade acetic acid was added to deionized water to prepare a 30% solution B.

[0068] (2) Take 25 g of dispersion A and 5 g of solution B, add 457.5 g of deionized water, stir, then add 12.5 g of polyurethane aqueous solution (solid content 40 wt%), stir well for 3 minutes to obtain 500 g of padding solution C.

[0069] (3) A polyester-cotton fabric (containing 80 wt% cotton and 20 wt% polyester) with a size of 30*30 cm and a weight of 180 g was selected as the fabric to be treated, immersed in the padding liquid C, and the excess liquid was removed by a padder. After naturally drying, the fabric was fixed at 160°C for 2 minutes.

[0070] The textile fabric samples prepared in Example 1 were tested for antibacterial properties according to the GB / T 20944.3-2008 oscillation method standard, and the results are shown in Table 1-1. The bacterial species selected for the antibacterial test are Escherichia coli, a typical species of Gram-negative bacteria, Staphylococcus aureus, a typical species of Gram-positive bacteria, and Candida albicans, a typical species of fungi.

[0071] Table 1-1 Antibacterial performance test results of textile fabric samples in Example 1

[0072]

[0073] As shown in Table 1, the antibacterial rates of the textile fabric samples prepared in Example 1 against the three bacterial species were all above 90% before and after washing, and the antibacterial properties were good.

[0074] The fabric samples prepared in Example 1 were tested for the removal of ammonia, acetic acid and isovaleric acid in accordance with ISO 17299-2:2014 and ISO 17299-3:2014, and the results are shown in Table 1-2. Ammonia, acetic acid and isovaleric acid are the main chemical components of human sweat odor.

[0075] Table 1-2 Deodorization performance test results of textile fabric samples in Example 1

[0076]

[0077]

[0078] The sample prepared in Example 1 has a high removal rate for sweat odor gas before washing with water, and after washing 10 times according to the standard, it still has a good removal rate for sweat odor gas.

[0079] Example 2

[0080] Embodiment 2 Antibacterial and deodorizing treatment of textiles is carried out by the following method, comprising:

[0081] (1) selecting high-purity titanium dioxide powder with a porous core-shell structure, a dispersant (sodium salt of polycarboxylate and sodium dodecyl sulfate, the mass ratio of the two being 1:1), and deionized water, and dispersing them in a high-speed disperser for 60 minutes to prepare a 10% nano core-shell titanium dioxide dispersion A, wherein the dispersant accounts for 0.3 wt% of the mass concentration of the dispersion A;

[0082] Food grade acetic acid was added to deionized water to prepare a 30% solution B.

[0083] (2) Take 25 g of dispersion A and 15 g of solution B, add 443.8 g of deionized water, stir, then add 16.2 g of polyurethane aqueous solution (solid content 40 wt%), stir well for 3 minutes to obtain 500 g of padding solution C.

[0084] (3) A polyester-cotton fabric (containing 80 wt% cotton and 20 wt% polyester) with a size of 30*30 cm and a weight of 180 g was selected as the fabric to be treated, immersed in the padding liquid C, and the excess liquid was removed by a padder. After naturally drying, the fabric was fixed at 160°C for 2 minutes.

[0085] The textile fabric samples prepared in the above Example 2 were tested for antibacterial properties according to the GB / T 20944.3-2008 oscillation method standard. The results are shown in Table 2-1.

[0086] Table 2-1 Antibacterial performance test results of textile fabric samples in Example 2

[0087]

[0088] As shown in Table 2-1, the antibacterial rate of the textile fabric sample prepared in Example 2 against the three bacterial species was above 90% before and after washing, and the antibacterial property was good.

[0089] The cloth sample prepared in Example 2 was tested for its ability to remove ammonia, acetic acid and isovaleric acid in accordance with ISO 17299-2:2014 and ISO 17299-3:2014. The results are shown in Table 2-2.

[0090] Table 2-2 Deodorization performance test results of textile samples in Example 2

[0091]

[0092] The sample prepared in Example 2 has a high removal rate for sweat odor gas before washing with water, and after washing 10 times according to the standard, it still has a good removal rate for sweat odor gas.

[0093] The difference between Example 1 and Example 2 is that the ratio of the photocatalyst to the weak acidic substance is adjusted. The results show that increasing the ratio of the weak acidic substance improves the ammonia removal effect of the textile after washing, but slightly reduces the inhibition rate of bacteria before washing, especially the inhibition rate of Candida albicans.

[0094] Example 3

[0095] Embodiment 3 Antibacterial and deodorizing treatment of textiles is carried out by the following method, comprising:

[0096] (1) selecting high-purity zinc oxide powder with a particle size of 50 nanometers, a dispersant (sodium polycarboxylate and sodium dodecyl sulfate, the mass ratio of the two is 1:1), and deionized water, and dispersing them in a high-speed disperser for 60 minutes to prepare a 15 wt% nano zinc oxide dispersion A, wherein the dispersant accounts for 0.3 wt% of the mass concentration of the dispersion A;

[0097] A 30% solution B was prepared by adding food grade citric acid to deionized water.

[0098] (2) Take 25 g of dispersion A and 5 g of solution B, add 452.2 g of deionized water, stir, then add 17.8 g of polyurethane aqueous solution (solid content 40 wt%), stir well for 3 minutes to obtain 500 g of padding solution C.

[0099] (3) A polyester-cotton fabric (cotton 80% polyester 20%) with a size of 30*30 cm and a weight of 180 g was selected as the fabric to be treated, immersed in the impregnation liquid C, and the excess liquid was squeezed out with a rolling car. After it was naturally dried, it was shaped at 160°C for 2 minutes.

[0100] The antibacterial performance of the textile fabric samples prepared in the above Example 3 was tested according to the oscillation method standard GB / T 20944.3-2008, and the results are shown in Table 3-1.

[0101] Table 3-1 Antibacterial performance test results of textile fabric samples in Example 3

[0102]

[0103]

[0104] As shown in Table 3-1, the antibacterial rate of the textile fabric sample prepared in Example 3 against the three bacterial species was above 90% before and after washing, and the antibacterial property was good.

[0105] The cloth sample prepared in Example 3 was tested for its ability to remove ammonia, acetic acid, and isovaleric acid in accordance with ISO 17299-2:2014 and ISO 17299-3:2014. The results are shown in Table 3-2.

[0106] Table 3-2 Deodorization performance test results of textile samples in Example 3

[0107]

[0108] The sample prepared in Example 3 has a high removal rate for sweat odor gas before washing with water, and after washing 10 times according to the standard, it still has a good removal rate for sweat odor gas.

[0109] Comparing Example 1 and Example 3, it can be seen that the difference of Example 3 is that zinc oxide is selected as the photocatalyst, and citric acid is selected as the weak acidic substance. The results show that: the ammonia removal effect is improved, but the removal rate of isovaleric acid is reduced, and the inhibition rate of bacteria before washing is increased, but the inhibition rate after washing is not changed.

[0110] Example 4

[0111] Embodiment 4 Antibacterial and deodorizing treatment of textiles is carried out by the following method, comprising:

[0112] (1) selecting high-purity zinc oxide powder with a particle size of 50 nanometers, a dispersant (sodium polycarboxylate and sodium dodecyl sulfate, the mass ratio of the two is 1:1), and deionized water, and dispersing them in a high-speed disperser for 60 minutes to prepare a 15 wt % nano zinc oxide dispersion A, wherein the dispersant accounts for 0.3 wt % of the mass concentration of the dispersion A;

[0113] A 30% solution B was prepared by adding food grade citric acid to deionized water.

[0114] (2) Take 25 g of dispersion A and 15 g of solution B, add 440.5 g of deionized water, stir, then add 19.5 g of polyurethane aqueous solution (solid content 40 wt%), stir well for 3 minutes to obtain 500 g of padding solution C.

[0115] (3) A polyester-cotton fabric (containing 80% cotton and 20% polyester) with a size of 30*30 cm and a weight of 180 g was selected as the fabric to be treated, immersed in the padding liquid C, and the excess liquid was removed by a padder. After naturally drying, it was shaped at 160°C for 2 minutes.

[0116] The textile fabric samples prepared in the above Example 4 were tested for antibacterial properties according to the oscillation method standard GB / T 20944.3-2008. The results are shown in Table 4-1.

[0117] Table 4-1 Antibacterial performance test results of textile fabric samples in Example 4

[0118]

[0119] As shown in Table 4-1, the antibacterial rate of the textile fabric sample prepared in Example 4 against the three bacterial species was above 90% before and after washing, and the antibacterial property was good.

[0120] The cloth sample prepared in Example 4 was tested for its performance in removing ammonia, acetic acid and isovaleric acid with reference to ISO 17299-2:2014 and ISO 17299-3:2014. The results are shown in Table 4-2.

[0121] Table 4-2 Deodorization performance test results of textile fabric samples in Example 4

[0122]

[0123] The sample prepared in Example 4 had a general removal rate for sweat odor gas before washing with water, but after washing 10 times according to the standard, it still had a good removal rate for sweat odor gas.

[0124] The difference between Example 3 and Example 4 is that Example 4 adjusts the ratio of the photocatalyst to the weak acidic substance relative to Example 3, and the ratio of the weak acidic substance to the photocatalyst is increased in Example 4. The results show that Example 4 increases the ratio of citric acid to improve the ammonia removal effect after washing, but reduces the inhibition rate of bacteria before washing, especially the inhibition rate of Candida albicans.

[0125] Example 5

[0126] Embodiment 5 Antibacterial and deodorizing treatment of textiles is carried out by the following method, comprising:

[0127] (1) Select high-purity titanium dioxide powder with a porous core-shell structure, a dispersant (sodium polycarboxylate and sodium dodecyl sulfate, the mass ratio of the two is 1:1), and deionized water, and disperse them in a high-speed disperser for 60 minutes to prepare a 10wt% nano core-shell titanium dioxide dispersion A, wherein the dispersant accounts for 0.2wt% of the mass concentration of the dispersion A; select high-purity zinc oxide powder with a particle size of 50 nanometers, a dispersant sodium dodecyl sulfate, and deionized water, and disperse them in a high-speed disperser for 60 minutes to prepare a 15wt% nano zinc oxide dispersion B, wherein the dispersant accounts for 0.2wt% of the mass concentration of the dispersion B;

[0128] A 30% solution C was prepared by adding food grade citric acid to deionized water.

[0129] (2) Take 13 g of dispersion A, 18 g of dispersion B, and 8 g of solution C, add 450.1 g of deionized water, stir, then add 10.9 g of polyurethane aqueous solution (solid content 40 wt%), stir well for 3 minutes to obtain 500 g of padding solution D.

[0130] (3) A 100% cotton 40S clothing fabric with a size of 30*30 cm and a weight of 160 g was selected as the fabric to be treated, and it was immersed in the padding liquid D, and the excess liquid was rolled out with a padder, and then it was naturally dried and fixed at 160° C. for 2 minutes.

[0131] The antibacterial performance of the textile fabric samples prepared in the above Example 5 was tested according to the GB / T 20944.3-2008 oscillation method standard, and the results are shown in Table 5-1.

[0132] Table 5-1 Test results of antibacterial properties of textile fabric samples in Example 5

[0133]

[0134] As shown in Table 5-1, the antibacterial rate of the textile fabric sample prepared in Example 5 against the three bacterial species was above 90% before and after washing, and the antibacterial property was good.

[0135] The cloth sample prepared in Example 5 was tested for its ability to remove ammonia, acetic acid, and isovaleric acid in accordance with ISO 17299-2:2014 and ISO 17299-3:2014. The results are shown in Table 5-2.

[0136] Table 5-2 Deodorization performance test results of textile fabric samples in Example 5

[0137]

[0138] The sample prepared in Example 5 has a high removal rate for sweat odor gas before washing with water, and after washing 10 times according to the standard, it still has a good removal rate for sweat odor gas.

[0139] Compared with Examples 1 to 4, the difference of Example 5 is that the light-adjusting catalyst is a mixture of porous core-shell titanium dioxide and nano zinc oxide, and the weak acidic substance is citric acid. The results show that the ammonia removal effect after washing is improved, and the antibacterial and other deodorization effects are good.

[0140] Example 6

[0141] Embodiment 6 Antibacterial and deodorizing treatment of textiles is carried out by the following method, comprising:

[0142] (1) Select high-purity titanium dioxide powder with a porous core-shell structure, a dispersant (sodium polycarboxylate and sodium dodecyl sulfate, the mass ratio of the two is 1:1), and deionized water, and disperse them in a high-speed disperser for 60 minutes to prepare a 10wt% nano core-shell titanium dioxide dispersion A, wherein the dispersant accounts for 0.2wt% of the mass concentration of the dispersion A; select high-purity zinc oxide powder with a particle size of 50 nanometers, a dispersant sodium dodecyl sulfate, and deionized water, and disperse them in a high-speed disperser for 60 minutes to prepare a 15wt% nano zinc oxide dispersion B, wherein the dispersant accounts for 0.2wt% of the mass concentration of the dispersion B;

[0143] A 30 wt % solution C was prepared by adding food grade citric acid and deionized water;

[0144] Sodium hypophosphite was added to deionized water to prepare a 10 wt% solution D.

[0145] (2) Take 13 g of dispersion A, 18 g of dispersion B, 8 g of solution C, and 8 g of solution D, add 440.7 g of deionized water, stir, then add 12.4 g of polyurethane aqueous solution (solid content 40 wt%), stir well for 3 minutes to obtain 500 g of padding solution E.

[0146] (3) A 100% cotton 40S clothing fabric with a size of 30*30 cm and a weight of 160 g was selected as the fabric to be treated, and it was immersed in the padding liquid E, and the excess liquid was rolled out with a padder. After it was naturally dried, it was set at 160° C. for 2 minutes.

[0147] The textile fabric samples prepared in the above Example 6 were tested for antibacterial properties according to the oscillation method standard GB / T 20944.3-2008. The results are shown in Table 6-1.

[0148] Table 6-1 Antibacterial performance test results of textile fabric samples in Example 6

[0149]

[0150] As shown in Table 6-1, the antibacterial rate of the textile fabric sample prepared in Example 6 against the three bacterial species was above 95% before and after washing, and the antibacterial property was good.

[0151] The cloth samples prepared in Example 6 were tested for the removal of ammonia, acetic acid, and isovaleric acid in accordance with ISO 17299-2:2014 and ISO 17299-3:2014. The results are shown in Table 6-2.

[0152] Table 6-2 Deodorization performance test results of textile samples in Example 6

[0153]

[0154] The sample prepared in Example 6 has a high removal rate for sweat odor gas before washing with water, and after washing 10 times according to the standard, it still has a good removal rate for sweat odor gas.

[0155] Compared with Example 5, Example 6 is different in that a reaction catalyst, sodium hypophosphite, is added on the basis of Example 5. The results show that the ammonia removal effect after washing is further improved, and the antibacterial and other deodorization effects are good.

[0156] Example 7

[0157] Embodiment 7 Antibacterial and deodorizing treatment of textiles is carried out by the following method, comprising:

[0158] (1) Select high-purity titanium dioxide powder with a porous core-shell structure, a dispersant (sodium polycarboxylate and sodium dodecyl sulfate, the mass ratio of the two is 1:1), and deionized water, and disperse them in a high-speed disperser for 60 minutes to prepare a 10wt% nano core-shell titanium dioxide dispersion A, wherein the dispersant accounts for 0.2wt% of the mass concentration of the dispersion A; select high-purity zinc oxide powder with a particle size of 50 nanometers, a dispersant sodium dodecyl sulfate, and deionized water, and disperse them in a high-speed disperser for 60 minutes to prepare a 15wt% nano zinc oxide dispersion B, wherein the dispersant accounts for 0.2wt% of the mass concentration of the dispersion B;

[0159] A 40% bio-acid solution was selected as solution C;

[0160] Sodium hypophosphite was added to deionized water to prepare a 10 wt% solution D.

[0161] (2) Take 13 g of dispersion A, 18 g of dispersion B, 8 g of solution C, and 8 g of solution D, add 440 g of deionized water, stir, then add 13 g of polyurethane aqueous solution (solid content 40 wt%), stir well for 3 minutes to obtain 500 g of padding solution E.

[0162] (3) Select pure linen clothing fabric with a size of 30*30 cm and a weight of 200 g as the fabric to be treated, immerse it in the padding liquid E, use a padder to remove excess liquid, and then dry it naturally and set it at 160°C for 2 minutes.

[0163] The textile fabric samples prepared in the above Example 7 were tested for antibacterial properties according to the oscillation method standard GB / T 20944.3-2008. The results are shown in Table 7-1.

[0164] Table 7-1 Antibacterial performance test results of textile fabric samples in Example 7

[0165]

[0166] It can be seen from Table 7-1 that the antibacterial rate of the textile cloth sample prepared in Example 7 against the three strains is above 95% before and after washing, and the antibacterial property is good.

[0167] The cloth sample prepared in Example 7 was tested for its ability to remove ammonia, acetic acid, and isovaleric acid in accordance with ISO 17299-2:2014 and ISO 17299-3:2014. The results are shown in Table 6-2.

[0168] Table 7-2 Deodorization performance test results of textile samples in Example 7

[0169]

[0170] The sample prepared in Example 7 has a high removal rate for sweat odor gas before washing with water, and after washing 10 times according to the standard, it still has a good removal rate for sweat odor gas.

[0171] Compared with Example 6, the difference between Example 7 and Example 7 is that the weak acid in Example 7 is 40% biological acid, and the treated sample fabric is 200g pure linen clothing fabric. The results show that the antibacterial and deodorizing functions are good both before and after washing.

[0172] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0173] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A method for antibacterial and deodorizing textiles, characterized in that: include: (1) mixing the photocatalyst, the weakly acidic substance and the selectively added reaction catalyst according to a predetermined mass ratio to obtain a composite solution; (2) mixing the compound liquid and the adhesive to obtain a padding liquid; (3) Immersing the textile in the impregnation liquid so that the impregnation liquid penetrates into the interior of the textile fibers, and then drying and shaping the textile to obtain the antibacterial textile.

2. The method according to claim 1, characterized in that The photocatalyst is selected from at least one of titanium dioxide, zinc oxide, copper oxide and silver oxide; Optionally, the particle size of the titanium dioxide, zinc oxide, copper oxide and silver oxide is 10-100 nm.

3. The method according to claim 1, characterized in that The photocatalyst is mixed in the form of a photocatalyst dispersion with a weakly acidic substance and a selectively added reaction catalyst in a predetermined mass ratio; The photocatalyst dispersion liquid is obtained by mixing and dispersing a photocatalyst, a dispersant and water, and the mass concentration of the photocatalyst dispersion liquid is 10wt% to 30wt%; Optionally, the dispersant is selected from at least one of polycarboxylic acid sodium salt, sodium dodecyl sulfate, and propylene glycol; Optionally, the mass ratio of the photocatalyst to the dispersant is 100:(1-10).

4. The method according to claim 3, characterized in that The weakly acidic substance is selected from at least one of acetic acid, citric acid and biological acid; Optionally, the weak acidic substance is added in the form of an aqueous solution of the weak acidic substance, and the mass concentration of the weak acidic aqueous solution is 20wt% to 40wt%; Optionally, the photocatalyst dispersion and the weakly acidic substance aqueous solution are mixed in a mass ratio of (1-5):

1.

5. The method according to claim 4, characterized in that The reaction catalyst is added in the form of a reaction catalyst aqueous solution, and the mass concentration of the reaction catalyst aqueous solution is 10wt% to 30wt%; Optionally, the mass ratio of the aqueous solution of the weakly acidic substance to the aqueous solution of the reaction catalyst is (2-4):

1.

6. The method according to claim 1, characterized in that The reaction catalyst is selected from at least one of sodium hypophosphite and ammonium citrate.

7. The method according to claim 1, characterized in that The adhesive is a polyurethane material, the solid content of the polyurethane material is 40% to 50%, and the mass ratio of the photocatalyst to the polyurethane material is (0.1 to 4):

1.

8. A method for preparing a washable textile antibacterial and deodorizing agent, characterized in that: include: (1) mixing a photocatalyst dispersion having a mass concentration of 10 wt% to 30 wt%, a weak acid substance aqueous solution having a mass concentration of 20 wt% to 40 wt%, and a reaction catalyst aqueous solution having a mass concentration of 10 wt% to 30 wt% in a predetermined mass ratio to obtain a composite solution; The mass ratio of the photocatalyst dispersion liquid to the weakly acidic substance aqueous solution is (1-5):1; The mass ratio of the weak acid substance aqueous solution to the reaction catalyst aqueous solution is (2-4):1; The photocatalyst is selected from at least one of titanium dioxide, zinc oxide, copper oxide and silver oxide; The weakly acidic substance is selected from at least one of acetic acid, citric acid and biological acid; The reaction catalyst is selected from at least one of sodium hypophosphite and ammonium citrate; (2) mixing the compound liquid and the adhesive to obtain a padding liquid; The adhesive is a polyurethane material, the solid content of the polyurethane material is 40% to 50%, and the mass ratio of the photocatalyst to the polyurethane material is (0.1 to 4):1; (3) Immersing the textile in the impregnation liquid so that the impregnation liquid penetrates into the interior of the textile fibers, and then drying and shaping the textile to obtain the antibacterial textile.

9. The method according to any one of claims 1 to 8, characterized in that: The antibacterial textile has an antibacterial rate of at least 90% before washing or after 10 to 50 washings, and a deodorizing rate of more than 70%.

10. The method according to any one of claims 1 to 8, characterized in that: The textile is selected from at least one of clothing, household items, towels, slippers, and automobile interiors.

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