A finishing method of functional polyester yarn with wash resistance

Abstract

The present application relates to the technical field of polyester yarn manufacturing process, and discloses a finishing method of functional polyester yarn with washing resistance, which utilizes surface micro-dissolution technology to fix functional nanocellulose on the surface of polyester yarn through dissolved terephthalate glycol (PET) molecules. In this process, nanocellulose is combined with PET through various non-covalent forces, so that it can be firmly adhered to polyester fibers and give good functionality. Compared with pure nanocellulose, the hydrophilicity of the cellulose after functional modification is reduced, which can better compatible with PET molecules, enhance the adhesion ability of cellulose, and further enhance the durability of functional finishing. The polyester fabric prepared by the method has good functionality and washing resistance, and has wide application prospect in the field of finishing functional polyester fabric.

Description

Technical Field

[0001] This invention relates to the field of polyester yarn manufacturing technology, specifically to a finishing method for functional polyester yarn with wash resistance, and particularly to a finishing method for polyester fibers to achieve UV resistance, antibacterial properties, and antistatic properties using surface micro-dissolution technology and functional nanocellulose. Background Technology

[0002] Polyester fiber is the most widely produced and used synthetic fiber in the world. Its low cost and good mechanical properties make it widely used in clothing fabrics, home furnishings, and other products. Currently, most polyester fabric finishing processes are achieved through traditional surface coating methods. This method is simple and convenient, but the resulting fabrics often have low levels of functional finishing agents, resulting in poor durability and breathability.

[0003] Nanocellulose, due to its unique physicochemical properties (such as high rigidity), abundant hydroxyl groups on its surface, and nanoscale size, is widely used in the preparation of nanoscale fillers that combine functionality and reinforcement. Current research has explored the use of nanocellulose in fabric finishing agents to treat fabrics. Quanyong Cheng et al., in their article "Cellulose nanocrystal coated cotton fabric with superhydrophobicity for efficient oil / water separation" published in Carbohydrate Polymers (Carbohydrate Polymers 2018, 199, 390-396), introduced a method for preparing superhydrophobic nanocellulose-based coated cotton fabrics using cured epoxidized soybean oil as a binder and its application in oil / water separation. However, the uneven and weak dyeing of nanocellulose-based materials results in fabrics with poor air permeability, limiting their application.

[0004] Therefore, this invention uses functional nanocellulose and waste PET plastic bottles as raw materials, and phenol as a solvent. Through a surface micro-dissolution method, nanocellulose and PET are fixed onto polyester fibers via various non-covalent forces, resulting in yarn with high dye uptake by the functional finishing agent. Simultaneously, in an aqueous environment, the hydrophobic groups on the yarn surface tend to aggregate, reducing the number of exposed hydroxyl groups and making it less likely for the functional finishing agent to detach from the fiber surface. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a finishing method for functional polyester yarns with wash resistance, solving the problems of low dye uptake of functional finishing agents, poor wash resistance, and poor air permeability in fabrics treated by traditional finishing methods.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] This invention uses functional nanocellulose and waste PET plastic bottles as raw materials, and phenol as a solvent. The nanocellulose and PET are fixed on the surface of polyester fibers by surface micro-dissolution method to obtain functional polyester yarn with good wash resistance.

[0010] A method for preparing a wash-resistant functional polyester yarn, the specific steps of which are as follows:

[0011] Step 1: Dissolve polyethylene terephthalate (PET) at an appropriate temperature to obtain a PET solution of a certain concentration;

[0012] Step 2: Add a certain concentration of functional nanocellulose to the PET solution, stir evenly, immerse the polyester yarn in the mixture, quickly pull it out, and dry it in an oven at an appropriate temperature to obtain functional polyester yarn.

[0013] Preferably, the appropriate temperature in step 1 is 80-100℃, the appropriate time is 20-40min, and the appropriate concentration is 5-15wt%.

[0014] Preferably, the functional nanocellulose in step 2 is nanocellulose with one or more of the following functionalities: antibacterial, anti-ultraviolet, or antistatic.

[0015] Preferably, the functional nanocellulose in step 2 is achieved by grafting functional molecules or functional nanoparticles onto the surface of nanocellulose to modify it.

[0016] Preferably, the functional molecule or functional nanoparticle includes one or more of cinnamyl chloride (C9H7ClO), zinc oxide (ZnO), carbon nanoparticles (CNPs), mono-dacylglycerol (M-DAG), and lignin.

[0017] Preferably, the concentration in step 2 is 5-15 wt%, and the appropriate temperature is 60-80℃.

[0018] (III) Beneficial Effects

[0019] Compared with the prior art, the present invention provides a finishing method for functional polyester yarn with wash resistance, which has the following beneficial effects:

[0020] 1. The finishing method for this wash-resistant functional polyester yarn uses UV-resistant nanocellulose, waste PET plastic bottles, and phenol as raw materials. The UV-resistant polyester yarn prepared by the surface micro-dissolution method not only has good UV resistance but also good wash resistance. It solves the problems of low dye uptake of functional finishing agents, poor wash resistance, and poor air permeability in fabrics treated by traditional finishing methods. At the same time, in an aqueous environment, the hydrophobic groups on the yarn surface tend to aggregate together, reducing the number of exposed hydroxyl groups and making it less likely for the functional finishing agent to fall off from the fiber surface. Attached Figure Description

[0021] Figure 1 This is a high-magnification test image obtained by field emission scanning electron microscopy (FT-SEM) of the wash-resistant functional polyester yarn prepared in Example 1 of the present invention.

[0022] Figure 2 This is a test diagram showing the single yarn strength test of the wash-resistant functional polyester yarn prepared in Example 1 of the present invention.

[0023] Figure 3 The test diagram shows the UV resistance and washability of the wash-resistant functional polyester yarn prepared in Example 1 of this invention.

[0024] Figure 4 This is a low-magnification test image obtained by field emission scanning electron microscopy (FT-SEM) of the wash-resistant functional polyester yarn prepared in Example 1 of the present invention.

[0025] Figure 5 These are test images of untreated fabrics under different magnifications using a field emission scanning electron microscope (FT-SEM).

[0026] Figure 6 Test diagrams for fabric air permeability testing of unfinished fabrics, wash-resistant functional polyester yarn prepared in Example 1, and conventionally coated fabrics.

[0027] Figure 7 Test graphs showing the UV resistance of unfinished fabrics and fabrics made from wash-resistant functional polyester yarns prepared in Example 1 (with different raw material ratios). Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] Example 1:

[0032] This embodiment provides a finishing method for functional polyester yarn with wash resistance, and the specific steps are as follows.

[0033] Specifically, the recycled PET plastic bottles are washed, dried, cut into pieces, placed in phenol, and dissolved at 100°C for 20 minutes to obtain a 15wt% PET solution. 15wt% cinnamoyl chloride-modified CNC is added to the PET solution, stirred evenly, and the yarn is immersed in the mixture and quickly pulled out and dried in an oven at 60°C to obtain UV-resistant polyester yarn.

[0034] Example 2:

[0035] This embodiment provides a finishing method for functional polyester yarn with wash resistance, and the specific steps are as follows.

[0036] Specifically, recycled PET plastic bottles are washed, dried, and cut into pieces. They are then mixed with phenol and dissolved at 90°C for 30 minutes to obtain a 10wt% PET solution. 10wt% lignin-modified CNC is added to the PET solution and stirred evenly. The yarn is then immersed in the mixture and quickly pulled out, and dried in an oven at 70°C to obtain UV-resistant and antibacterial polyester yarn.

[0037] Example 3:

[0038] This embodiment provides a finishing method for functional polyester yarn with wash resistance, and the specific steps are as follows.

[0039] Specifically, recycled PET plastic bottles are washed, dried, and cut into sheets. Phenol is used as a solvent to dissolve the PET solution at 95°C for 25 minutes to obtain a 5wt% PET solution. 5wt% ZnO-modified CNC is added to the PET solution and stirred evenly. The yarn is then immersed in the mixture and quickly pulled out, and dried in an oven at 80°C to obtain UV-resistant, antibacterial, and antistatic polyester yarn.

[0040] Example 4:

[0041] This embodiment provides a finishing method for functional polyester yarn with wash resistance, and the specific steps are as follows.

[0042] Specifically, recycled PET plastic bottles are washed, dried, and cut into pieces. Phenol is used as a solvent to dissolve the PET in the solution at 80°C for 40 minutes to obtain a 10wt% PET solution. 10wt% of mono-diaacrylic acid (M-DAG) modified CNC is added to the PET solution and stirred evenly. The yarn is then immersed in the mixture and quickly pulled out, and dried in an oven at 75°C to obtain antistatic polyester yarn.

[0043] Example 5:

[0044] This embodiment provides a finishing method for functional polyester yarn with wash resistance, and the specific steps are as follows.

[0045] Specifically, recycled PET plastic bottles are washed, dried, and cut into sheets. Phenol is used as a solvent to dissolve the PET in the solution at 95°C for 25 minutes to obtain a 15wt% PET solution. 15wt% carbon nanoparticles (CNPs) are added to modify CNC and stirred evenly. The yarn is then immersed in the mixture and quickly pulled out and dried in an oven at 65°C to obtain antistatic polyester yarn.

[0046] The UV-resistant polyester yarn obtained in Embodiment 1 of this invention was tested:

[0047] Its morphology was observed using field emission scanning electron microscopy (FT-SEM); the reinforcing effect of nanocellulose on yarn was analyzed using a single yarn strength tester; and its UV resistance was tested using a textile UV resistance factor tester. The results of the three tests are as follows:

[0048] (1) Field emission scanning electron microscopy (FT-SEM) tests showed that UV-resistant nanocellulose successfully adhered to the surface of polyester fibers. See Appendix Figure 1 .

[0049] (2) Single yarn strength tester tests showed that the addition of nanocellulose had a strengthening effect on the yarn. See Appendix Figure 2 .

[0050] (3) Fabrics woven from polyester yarn prepared by this method have good UV protection and good washability. See Appendix. Figure 3 .

[0051] Therefore, the washable UV-resistant polyester yarn prepared by this invention has excellent UV resistance and has broad application prospects in UV-resistant home furnishings, outdoor sports and other fields.

[0052] In summary, the finishing method for this wash-resistant functional polyester yarn, using UV-resistant nanocellulose, waste PET plastic bottles, and phenol as raw materials, prepares UV-resistant polyester yarn through a surface micro-dissolution method. This yarn not only has excellent UV resistance but also good wash resistance, solving the problems of low dye uptake of functional finishing agents, poor wash resistance, and poor air permeability in fabrics treated by traditional finishing methods. Furthermore, in an aqueous environment, the hydrophobic groups on the yarn surface tend to aggregate, reducing the number of exposed hydroxyl groups and making it less likely for the functional finishing agent to detach from the fiber surface.

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for finishing functional polyester yarn with washability, characterized in that, Includes the following steps: Step 1: Dissolve polyethylene terephthalate (PET) at an appropriate temperature to obtain a PET solution of a certain concentration; Step 2: Add a certain concentration of functional nanocellulose to the PET solution, stir evenly, immerse the polyester yarn in the mixture, quickly pull it out, and dry it in an oven at an appropriate temperature to obtain functional polyester yarn. The solvent used for dissolution in step 1 is phenol; The appropriate temperature in step 1 is 80-100℃, the concentration of the PET solution is 5-15wt%, and the dissolution time is 20-40min. The functional nanocellulose described in step 2 is achieved by grafting functional molecules or functional nanoparticles onto the surface of nanocellulose to modify it. The functional molecules or functional nanoparticles include one or more of cinnamyl chloride (C9H7ClO), zinc oxide (ZnO), carbon nanoparticles (CNPs), mono-dacylglycerol (M-DAG), and lignin. In step 2, the concentration of the functional nanocellulose is 5-15 wt%, and the temperature of the oven is 60-80℃.

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