A wash-resistant high-content collagen polyester-coated fabric and its preparation method

Abstract

The invention discloses a preparation method of a polyester coated fabric with high collagen content and wash resistance, belonging to the field of textile after-finishing. In this method, dodecyl dimethyl ammonium bromide is used to cationically modify polyester in advance to increase the adsorption amount of collagen on polyester, and then a novel collagen coating finishing agent is used to pad and coat the polyester fabric, finally obtaining a hydrophilic polyester coated fabric with high collagen content and wash resistance. This method can improve the collagen content and wash resistance on the surface of the polyester fabric while achieving good wearing performance.

Description

Technical Field

[0001] The present invention belongs to the technical field of functional coating finishing of polyester fabrics, and particularly relates to a polyester coated fabric with high content of collagen resistant to washing and a preparation method thereof. Background Art

[0002] Polyester fibers have high strength, stable chemical properties and excellent heat resistance. Since its birth, it has been deeply loved by people. At present, it has become the most important raw material for textile fibers and has important application values in the fields of clothing products, industrial textiles and medical tissue materials. However, polyester has high hydrophobicity and is prone to generate static electricity, which brings great problems to its wearing performance. For example, when used as products such as underwear, home textile fabrics and wigs, a large amount of static electricity is easily generated due to friction, resulting in phenomena such as fiber or fabric attracting dust and sticking to the body. In addition, a large amount of static electricity will also stimulate the skin, causing discomfort symptoms such as body itching and dryness, which greatly reduces the value of polyester products. Therefore, it is particularly important to carry out coating finishing on polyester to improve its functionality. Among many finishing methods, protein modification of polyester is a current hotspot. Fabrics with protein coatings can not only reduce the hydrophobicity of fibers, but also improve the skin-friendly performance of polyester. Especially collagen coatings, due to their amino acid composition being the same as that of the skin, have higher skin-friendliness and biocompatibility, which makes collagen-coated polyester have important application values in the fields of home textile fabrics and artificial blood vessels.

[0003] Currently, there are two methods for processing collagen-modified polyester fabrics. One is to first treat polyester with alkali weight reduction to expose more hydrophilic groups, and then introduce collagen onto the fiber surface by chemical or enzyme-catalyzed grafting reactions. This method not only has a complex process and high cost, but also has a low protein introduction ratio and poor modification effect. In addition, alkali weight reduction will cause serious strength damage to the fibers and cause great pollution to the environment. The other method is to impregnate polyester with collagen first, and then use formaldehyde or glutaraldehyde to crosslink the collagen to improve its washing fastness. Although this treatment method simplifies the steps, the hydrophobicity of polyester results in a low adsorption amount of collagen, poor washing fastness after coating, and the substances such as formaldehyde and glutaraldehyde are highly toxic to cells, and residues will cause carcinogenic problems, which does not meet the requirements of ecological dyeing and finishing processing. Therefore, it is necessary to find a new environmentally friendly and effective treatment method for polyester protein coatings. Summary of the Invention

[0004] In the existing polyester protein coating finishing process, due to the high hydrophobicity of polyester, the adsorption amount of collagen is low and the wash fastness is poor. If pretreatment such as alkali deweighting is used to increase the adsorption amount or generate grafting sites, it will cause great strength damage to the fabric and great environmental pollution; if compounds such as formaldehyde or glutaraldehyde are used to crosslink collagen to improve the fastness, carcinogenic problems will occur, which is not conducive to the improvement of fabric quality.

[0005] One of the purposes of the present invention is to provide a method for preparing a polyester fabric with a high content of wash-resistant collagen coating to solve the above technical problems.

[0006] Another purpose of the present invention is to provide a polyester fabric with a high content of wash-resistant collagen coating prepared by the above preparation method.

[0007] To solve the above problems and achieve the above purposes, the present invention attempts to use charge adsorption and crosslinking plasticization to improve the coating finishing effect of collagen on polyester.

[0008] The present invention provides a method for preparing a polyester fabric with a high content of wash-resistant collagen coating, which uses cationic ammonium salt modification combined with collagen coating to finish the polyester fabric. Specifically, the polyester fabric is first subjected to cationic ammonium salt modification to obtain a cation-modified polyester fabric, and then the cation-modified polyester fabric is subjected to collagen coating.

[0009] In an optional embodiment, the cationic ammonium salt modification is to dip-roll the polyester fabric in a solution of dodecyl dimethyl ammonium bromide with a certain concentration, and then perform baking to obtain the cation-modified polyester fabric.

[0010] In an optional embodiment, during the cationic ammonium salt modification process, the amount of dodecyl dimethyl ammonium bromide is 2-20 g / L, the liquid pick-up rate of the dip-rolled fabric is 70-100%, the baking temperature is 130-170 °C, and the baking time is 2-5 min.

[0011] In an optional embodiment, the collagen coating is to treat the cation-modified polyester fabric with a collagen coating finishing agent, which consists of three parts: collagen, bis(aldehyde) polyethylene glycol, and waterborne polyurethane.

[0012] In an optional embodiment, during the collagen coating process, the collagen coating finishing agent consists of collagen, bis(aldehyde) polyethylene glycol, and waterborne polyurethane, and the molar ratio of the three is 100:(1-30):100. The dosage of the coating finishing agent is 2-20 g / L, and the pH value is 4-7; the treatment method is to dip-roll the cation-modified polyester fabric with the collagen coating finishing agent, the liquid pick-up rate of the dip-rolled fabric is 60%-150%, the drying temperature is 80-170 °C, and the drying time is 3-60 min.

[0013] In the processing method, the present invention first uses a cationic compound, dodecyl dimethyl ammonium bromide, to carry out cationic modification on polyester; dodecyl dimethyl ammonium bromide has good adsorption ability for polyester and is positively charged. After surface modification of polyester, the collagen adsorption amount can be greatly increased.

[0014] Secondly, a novel collagen coating agent composed of collagen, bis(aldehyde-terminated) polyethylene glycol, and aqueous polyurethane is used for finishing; in this finishing agent, bis(aldehyde-terminated) polyethylene glycol is a novel aldehyde-functionalized polyethylene glycol derivative, which has the characteristics of being safe, non-toxic, and having high reaction efficiency; it can crosslink with collagen to increase the wash resistance; moreover, the contained polyethylene glycol segments can also increase the solubility and stability of collagen, which helps to improve the uniformity of coating processing.

[0015] Finally, bis(aldehyde-terminated) polyethylene glycol and aqueous polyurethane have similar chain segment structures, which greatly improves the compatibility between collagen and the aqueous polyurethane film-forming agent, and is also of great significance for improving fastness and handle.

[0016] Beneficial effects:

[0017] (1) The present invention carries out cationic modification on polyester through dodecyl dimethyl ammonium bromide. Since dodecyl dimethyl ammonium bromide has good adsorption ability for polyester and is positively charged, its adsorption on the surface of polyester can significantly increase the collagen adsorption amount, and the collagen adsorption amount can be increased from 1% of the untreated to 8.2%.

[0018] (2) The present invention is finished by using a novel collagen coating agent composed of collagen, bis(aldehyde-terminated) polyethylene glycol, and aqueous polyurethane. Among them, bis(aldehyde-terminated) polyethylene glycol can crosslink with collagen to increase the wash resistance, and can endow the coated polyester fabric with excellent washing resistance. After washing 30 times, the weight gain rate of the polyester fabric can still reach 7.6%.

[0019] (3) In the present invention, bis(aldehyde-terminated) polyethylene glycol and aqueous polyurethane have similar chain segment structures, which greatly improves the compatibility between collagen and the aqueous polyurethane film-forming agent. On the one hand, it further improves the washing resistance of the polyester fabric, and on the other hand, it can endow the polyester fabric with good wetting properties. The capillary rise of the polyester fabric can be increased from 0.5 cm of the untreated to a maximum of 8.0 cm, which helps to greatly reduce the electrostatic effect. Specific embodiments

[0020] The following are descriptions of the preferred embodiments of the present invention. It should be understood that the embodiments are for better explaining the present invention and are not used to limit the present invention.

[0021] Weight gain rate test method: The adsorption amount was characterized by the weighing method. The fabrics before and after treatment were dried until completely dry and weighed, denoted as m0 and m1 respectively, and calculated according to the following formula: weight gain rate = (m1 - m0) / m0 * 100%;

[0022] Wicking effect test method: The test was carried out with reference to FZ / T 01071-2008 "Test Method for Capillary Effect of Textiles" to characterize the wetting performance of the fabric;

[0023] Washing fastness test method: The test was carried out with reference to GB / T 8629-2017 "Textiles - Domestic Washing and Drying Procedures for Testing" to characterize the wash fastness of the fabric.

[0024] The raw materials used in the examples and control examples of the present invention were polyester shuttle fabrics, with a fabric specification of 250 g / m and a wicking effect of 0.5 cm.

[0025] Example 1

[0026] Prepare a cationic modification solution according to the process recipe: The dosage of didodecyldimethylammonium bromide was 2 g / L.

[0027] Then process according to the following steps: Immerse the polyester shuttle fabric in the modification solution and pad, two-immersion two-padding, with a liquor pickup of 70%, then cure, at a temperature of 130 °C and a curing time of 5 min, to obtain a cationic modified polyester shuttle fabric.

[0028] After the above cationic modification, the weight gain rate of the polyester shuttle fabric was 1.1% and the wicking effect was 5.4 cm.

[0029] Prepare a collagen coating finishing agent according to the process recipe: Collagen: Bisaldehyde polyethylene glycol: Waterborne polyurethane

[0030] = 100:10:100 (molar ratio), the dosage of the coating finishing agent was 10 g / L, and the pH value was adjusted to 5.5.

[0031] Then process according to the following steps: Immerse the cationic modified polyester shuttle fabric in the collagen coating finishing agent and pad, two-immersion two-padding, with a liquor pickup of 100%, then dry, at a temperature of 130 °C and a time of 5 min.

[0032] After the above collagen coating finishing, the weight gain rate of the polyester shuttle fabric was 8.0%, the wicking effect was 7.8 cm, and after washing 30 times, the weight gain rate was 7.4% and the wicking effect was 7.6 cm.

[0033] Example 2

[0034] Prepare a cationic modification solution according to the process recipe: The dosage of didodecyldimethylammonium bromide was 10 g / L.

[0035] After that, the following steps are carried out: Place the polyester woven fabric in the modification liquid and pad it, two padding and two squeezing, the liquor pickup is 84%, then bake it at a temperature of 170 °C for 2 minutes to obtain the cation-modified polyester woven fabric.

[0036] After the above cation modification, the weight gain rate of the polyester woven fabric is 1.5%, and the capillary effect is 5.9 cm.

[0037] Prepare the collagen coating finishing agent according to the process prescription: Collagen: Double-end aldehyde polyglycol: Waterborne polyurethane

[0038] = 100:10:100 (molar ratio), the dosage of the coating finishing agent is 10 g / L, and adjust the pH value to 5.5.

[0039] After that, the following steps are carried out: Place the cation-modified polyester woven fabric in the collagen coating finishing agent and pad it, two padding and two squeezing, the liquor pickup is 100%, then dry it at a temperature of 130 °C for 5 minutes.

[0040] After the above collagen coating finishing, the weight gain rate of the polyester woven fabric is 8.2%, the capillary effect is 8.0 cm, and after washing 30 times, the weight gain rate is 7.6%, and the capillary effect is 7.8 cm.

[0041] Example 3

[0042] Prepare the cation modification liquid according to the process prescription: The dosage of dodecyl dimethyl ammonium bromide is 20 g / L.

[0043] After that, the following steps are carried out: Place the polyester woven fabric in the modification liquid and pad it, two padding and two squeezing, the liquor pickup is 100%, then bake it at a temperature of 170 °C for 2 minutes to obtain the cation-modified polyester woven fabric.

[0044] After the above cation modification, the weight gain rate of the polyester woven fabric is 2.0%, and the capillary effect is 6.5 cm.

[0045] Prepare the collagen coating finishing agent according to the process prescription: Collagen: Double-end aldehyde polyglycol: Waterborne polyurethane

[0046] = 100:10:100 (molar ratio), the dosage of the coating finishing agent is 10 g / L, and adjust the pH value to 5.5.

[0047] After that, the following steps are carried out: Place the cation-modified polyester woven fabric in the collagen coating finishing agent and pad it, two padding and two squeezing, the liquor pickup is 100%, then dry it at a temperature of 130 °C for 5 minutes.

[0048] After the above-mentioned collagen coating treatment, the weight gain rate of the polyester woven fabric is 8.3%, the capillary effect is 8.0 cm. After 30 washes, the weight gain rate is 7.6%, and the capillary effect is 7.8 cm.

[0049] Example 4

[0050] Prepare the cationic modification solution according to the process prescription: the dosage of didodecyldimethylammonium bromide is 10 g / L.

[0051] Then process according to the following steps: Immerse and pad the polyester woven fabric in the modification solution, two dips and two pads, the liquor pickup rate is 84%, then cure at a temperature of 170 °C for 2 min to obtain the cation-modified polyester woven fabric.

[0052] After the above-mentioned cationic modification, the weight gain rate of the polyester woven fabric is 1.5%, and the capillary effect is 5.9 cm.

[0053] Prepare the collagen coating finishing agent according to the process prescription: collagen: di-aldehyde-terminated polyethylene glycol: waterborne polyurethane = 100:1:100 (molar ratio), the dosage of the coating agent is 10 g / L, and adjust the pH value to 4.

[0054] Then process according to the following steps: Immerse and pad the cation-modified polyester woven fabric obtained in Example 3 in the collagen coating finishing agent, two dips and two pads, the liquor pickup rate is 60%, then dry at a drying temperature of 170 °C for 3 min.

[0055] After the above-mentioned collagen coating treatment, the weight gain rate of the polyester woven fabric is 7.2%, the capillary effect is 7.0 cm. After 30 washes, the weight gain rate is 6.1%, and the capillary effect is 7.0 cm.

[0056] Example 5

[0057] Prepare the cationic modification solution according to the process prescription: the dosage of didodecyldimethylammonium bromide is 10 g / L.

[0058] Then process according to the following steps: Immerse and pad the polyester woven fabric in the modification solution, two dips and two pads, the liquor pickup rate is 84%, then cure at a temperature of 170 °C for 2 min to obtain the cation-modified polyester woven fabric.

[0059] After the above-mentioned cationic modification, the weight gain rate of the polyester woven fabric is 1.5%, and the capillary effect is 5.9 cm.

[0060] Prepare the collagen coating finishing agent according to the process prescription: collagen: di-aldehyde-terminated polyethylene glycol: waterborne polyurethane = 100:30:100 (molar ratio), the dosage of the coating finishing agent is 10 g / L, and adjust the pH value to 7.

[0061] After that, the following steps are carried out: The cation-modified polyester shuttle fabric obtained in Example 3 is padded in the collagen coating finishing agent, padded twice and double-rolled, the liquor pickup rate is 150%, and then dried at a temperature of 80 °C for 60 min.

[0062] After the above collagen coating finishing, the weight gain rate of the polyester shuttle fabric is 6.3%, the capillary effect is 6.5 cm, and after 30 washes, the weight gain rate is 5.3% and the capillary effect is 6.0 cm.

[0063] Effect of collagen coating finishing on the un-cation-modified polyester shuttle fabric in Comparative Example 1

[0064] Prepare the collagen coating finishing agent according to the process prescription: Collagen: di-aldehyde-terminated polyethylene glycol: waterborne polyurethane = 100:10:100 (molar ratio), the dosage of the coating finishing agent is 10 g / L, and the pH value is adjusted to 5.5.

[0065] After that, the following steps are carried out: The un-cation-modified polyester shuttle fabric is padded in the collagen coating finishing agent, padded twice and double-rolled, the liquor pickup rate is 100%, and then dried at a temperature of 130 °C for 5 min.

[0066] After the above collagen coating finishing, the weight gain rate of the polyester shuttle fabric is 3.0%, the capillary effect is 3.2 cm, and after 30 washes, the weight gain rate is 2.6% and the capillary effect is 2.5 cm.

[0067] Effect of the collagen coating finishing agent without di-aldehyde-terminated polyethylene glycol on the polyester shuttle fabric in Comparative Example 2

[0068] Prepare the cation modification solution according to the process prescription: The dosage of dodecyl dimethyl ammonium bromide is 10 g / L.

[0069] After that, the following steps are carried out: The polyester shuttle fabric is padded in the modification solution, padded twice and double-rolled, the liquor pickup rate is 84%, and then baked at a temperature of 170 °C for 2 min to obtain the cation-modified polyester shuttle fabric.

[0070] After the above cation modification, the weight gain rate of the polyester shuttle fabric is 1.5%, and the capillary effect is 5.9 cm.

[0071] Prepare the collagen coating finishing agent according to the process prescription: Collagen: di-aldehyde-terminated polyethylene glycol: waterborne polyurethane = 100:0:100 (molar ratio), the dosage of the coating finishing agent is 10 g / L, and the pH value is adjusted to 5.5.

[0072] After that, the following steps are carried out: The cation-modified polyester shuttle fabric is padded in the collagen coating finishing agent, padded twice and double-rolled, the liquor pickup rate is 100%, and then dried at a temperature of 130 °C for 5 min.

[0073] After the above-mentioned collagen coating treatment, the weight gain rate of the polyester woven fabric is 8.0%, the capillary effect is 6.4 cm. After 30 washes, the weight gain rate is 3.6%, and the capillary effect is 3.5 cm.

[0074] The test results of Examples 1-5 and Comparative Examples 1-2 are shown in the following table:

[0075]

[0076] From the comparison of the test results of Examples 1, 2, 3 and Comparative Example 1:

[0077] Using dodecyl dimethyl ammonium bromide to carry out cationic modification on the polyester woven fabric has a significant impact on the adsorption of collagen on the polyester. Unmodified polyester cannot adsorb a large amount of collagen, resulting in a lower weight gain rate after coating.

[0078] From the comparison of the test results of Examples 2, 4, 5 and Comparative Example 2:

[0079] The presence of di-aldehyde-terminated polyethylene glycol has a significant impact on the fixation of collagen. After finishing with a collagen coating agent without di-aldehyde-terminated polyethylene glycol, collagen cannot be effectively cross-linked, resulting in a lower molecular weight and being easily lost during the washing test. The weight gain rate of the coated fabric drops significantly, and the wettability also drops significantly.

Claims

1. A preparation method of a high-content collagen polyester coated fabric with wash resistance, characterized in that, The method is to finish polyester fabrics by using cationic ammonium salt modification combined with collagen coating. Specifically, the polyester fabrics are first subjected to cationic ammonium salt modification to obtain cation-modified polyester fabrics, and then the cation-modified polyester fabrics are subjected to collagen coating treatment. The cationic ammonium salt modification is to pad the polyester fabrics in a solution of dodecyl dimethyl ammonium bromide at a certain concentration, and then perform baking to obtain cation-modified polyester fabrics. During the cationic ammonium salt modification process, the dosage of dodecyl dimethyl ammonium bromide is 2-20 g / L, the liquid pickup of the padded fabric is 70-100%, the baking temperature is 130-170 °C, and the baking time is 2-5 min. The collagen coating treatment is to pad the cation-modified polyester fabrics with a collagen coating finishing agent for treatment. During the collagen coating treatment process, the collagen coating finishing agent is composed of collagen, double-end aldehyde group polyethylene glycol, and waterborne polyurethane, and the molar ratio of the three is 100: 1-30:

100. The dosage of the coating finishing agent is 2-20 g / L, and the pH value is 5.5-7. The liquid pickup of the padded fabric is 60%-150%, the drying temperature is 80-170 °C, and the drying time is 3-60 min.

2. A wash-resistant high-content collagen polyester coated fabric, characterized in that It is prepared by the preparation method described in claim 1.

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