Low-interfacial tension polyester high-speed spinning impregnating compound and preparation method thereof

Abstract

The invention belongs to the technical field of impregnating compound preparation, and particularly relates to a low-interfacial-tension polyester high-speed spinning impregnating compound and a preparation method thereof. The polyether modified organic silicon is prepared from raw materials including hydroxyl-terminated polydimethylsiloxane, modified polyether, a catalyst and an antioxidant; the preparation method comprises the following steps: preparing a POSS / PEGDA (Polyethylene Glycol Diacrylate) compound from the raw materials of octahydroxy butyl-POSS, octyl glycidyl ether, polyethylene glycol diacrylate and a photoinitiator; the impregnating compound is prepared by further mixing the raw materials of the POSS / PEGDA compound, the polyether modified organic silicon, the antistatic agent, the compound emulsifier and the deionized water, and the impregnating compound has low surface tension, good stability and high temperature resistance and can adapt to high-temperature and continuous operation working conditions of high-speed spinning.

Description

Technical Field

[0001] This invention belongs to the field of sizing agent preparation technology, specifically a low interfacial tension polyester high-speed spinning sizing agent and its preparation method. Background Technology

[0002] Polyester, as the world's largest-volume synthetic fiber, is widely used in textiles, apparel, industrial filter materials, and medical and health fields. With the textile industry's transformation towards high efficiency and high-end products, high-speed polyester spinning has become the mainstream production method. In the high-speed polyester spinning process, the molten polyester melt, after being extruded through a spinneret, undergoes rapid cooling, drawing, and winding. During this process, a large amount of static electricity is generated on the fiber surface due to friction, and there is intense friction between the fiber and metal components such as guide rollers and hot plates. Simultaneously, filament dispersion easily occurs, directly leading to process defects such as fuzz, breakage, and winding edge collapse, severely affecting efficiency and product yield. Therefore, sizing agents are indispensable auxiliaries in high-speed polyester spinning, ensuring the continuity of the spinning process and the high quality of the fiber products.

[0003] Chinese Patent CN117127406B discloses a polyester FDY spinning oil, prepared from raw materials including coconut oil polyoxyethylene ether, fatty alcohol polyoxyethylene ether, EL-type polyoxyethylene ether, smoothing agent, antistatic agent, and water. Through the synergistic effect of these materials, the prepared spinning oil is less prone to demulsification and precipitation under high-temperature conditions, and can spread rapidly upon contact with the fiber surface, providing excellent protection for the polyester filaments. Chinese Patent CN119777035B discloses a method for preparing a polyester FDY spinning oil and its application, prepared from raw materials including smoothing agent, emulsifier, antistatic agent, wetting and penetrating agent, antioxidant, and water. It exhibits good high-temperature resistance, oxidation resistance, high storage stability, and excellent wetting and spreading properties.

[0004] However, existing wetting agents often struggle to achieve a balance between low interfacial tension and stable film-forming properties during use. This often results in insufficient mechanical strength of the oil film due to reduced surface tension caused by increased wettability, making it prone to rupture at high shear rates and leading to lubrication failure. Therefore, there is an urgent need to develop a low interfacial tension wetting agent that can adapt to high-speed spinning processes and meet processing requirements. Summary of the Invention

[0005] To address at least one of the above problems, the present invention provides the following technical solution: A method for preparing a low interfacial tension polyester high-speed spinning sizing agent includes the following steps: S100: Polyether-modified organosilicon is prepared by using raw materials including hydroxyl-terminated polydimethylsiloxane, modified polyether, catalyst, and antioxidant. S200, using octahydroxybutyl-POSS, octyl glycidyl ether, polyethylene glycol diacrylate, and photoinitiator as raw materials, prepared a POSS / PEGDA composite. S300: After mixing the POSS / PEGDA composite and polyether-modified organosilicon, an antistatic agent and a composite emulsifier are added. After shearing and emulsification, deionized water is added and the mixture is stirred evenly to obtain the wetting agent.

[0006] Further, step S100 specifically involves: adding terminal hydroxyl polydimethylsiloxane, modified polyether, and catalyst to a reactor under an inert atmosphere, raising the temperature to 105-115℃, reacting at a constant temperature for 4-6 hours, adding an antioxidant, continuing to stir at a constant temperature for 1-2 hours, lowering the temperature to 55-65℃, adding anhydrous ethanol, filtering, and then obtaining polyether-modified organosilicon by rotary evaporation.

[0007] Further, the catalyst is one or a mixture of several of stannous octoate, dibutyltin dilaurate, zinc isooctanoate, tetrabutyl titanate, and monobutyltin oxide; the antioxidant is one or a mixture of several of antioxidant 1010, antioxidant 1076, antioxidant 168, antioxidant 264, antioxidant 3114, and antioxidant BHT.

[0008] Furthermore, the modified polyether is methyl allyl alcohol polyoxyethylene ether.

[0009] Furthermore, step S200 specifically includes: S210. Add octahydroxybutyl-POSS and octyl glycidyl ether to the reactor, mix well, add polyethylene glycol diacrylate, continue stirring for 10-20 min, add ethanol aqueous solution, shear at high speed for 20-30 min, add photoinitiator, continue stirring for 6-10 min to obtain pre-dispersion. S220. Transfer the pre-dispersion liquid to a mold, place it in an ultraviolet curing chamber, and irradiate it at room temperature for 15-20 minutes. After photocuring and crosslinking, wash, dry, pulverize, and sieve to obtain the POSS / PEGDA composite.

[0010] Further, step S300 specifically involves: adding POSS / PEGDA composite and polyether-modified organosilicon to the reactor, raising the temperature to 55-65°C, stirring for 20-40 minutes, lowering the temperature to 35-45°C, adding antistatic agent and composite emulsifier, emulsifying at high speed for 40-50 minutes, adding deionized water, and mixing evenly to obtain the impregnating agent.

[0011] Furthermore, the antistatic agent is one or a mixture of several of the following: hexadecyltrimethylammonium chloride, octadecyltrimethylammonium chloride, dodecyltrimethylammonium chloride, hexadecyldimethylbenzylammonium chloride, dioctadecyldimethylammonium chloride, and cocoyltrimethylammonium chloride.

[0012] Furthermore, the composite emulsifier is obtained by compounding lauryl alcohol polyoxyethylene ether and polyethylene glycol monostearate at a mass ratio of 1-3:1.

[0013] A low interfacial tension polyester high-speed spinning sizing agent is prepared by the preparation method of a low interfacial tension polyester high-speed spinning sizing agent as described in any of the above technical solutions.

[0014] The present invention has the following beneficial effects: This invention utilizes a grafting reaction between methyl allyl alcohol polyoxyethylene ether and hydroxyl-terminated polydimethylsiloxane to obtain polyether-modified organosilicon, effectively improving the hydrophilicity of hydroxyl-terminated polydimethylsiloxane and reducing its interfacial tension. Furthermore, polyethylene glycol diacrylate is used to in-situ encapsulate a mixture of octahydroxybutyl-POSS and octyl glycidyl ether, forming a micro-oil capsule structure complex that effectively prevents the migration and loss of low surface energy components. Through the synergistic effect of the polyether-modified organosilicon and the POSS / PEGDA complex, combined with the optimized formulation of the composite emulsifier, the prepared sizing agent can spread rapidly and uniformly on the surface of polyester fibers, forming a dense protective film, improving spinning continuity and fiber quality. The use of lauryl alcohol polyoxyethylene ether and polyethylene glycol monostearate as composite emulsifiers ensures that the prepared sizing agent is not easily demulsified under high-speed shearing and high-temperature spinning environments, allowing for long-term stable use. Detailed Implementation

[0015] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0016] Polyester is widely used in textiles, clothing, and other fields due to its high strength, abrasion resistance, and good elasticity. High-speed spinning technology is one of the core technologies in the industrial production of polyester. However, during high-speed spinning, after the melt is extruded from the spinneret, it undergoes rapid cooling, stretching, and winding processes, resulting in high frictional resistance and static electricity accumulation on the fiber surface. This can easily lead to problems such as fuzzing and fiber breakage, seriously affecting the continuity of spinning and the quality of the finished fiber. A sizing agent can form a uniform protective film on the fiber surface, reducing the surface friction coefficient and eliminating static electricity, thereby ensuring the smooth progress of the high-speed spinning process. However, existing sizing agents have unstable performance during use, which will affect the subsequent processing performance of polyester fibers. Therefore, this invention provides a method for preparing a low interfacial tension polyester high-speed spinning sizing agent, comprising the following steps: S100: Polyether-modified organosilicon is prepared by using raw materials including hydroxyl-terminated polydimethylsiloxane, modified polyether, catalyst, and antioxidant. S200, using octahydroxybutyl-POSS, octyl glycidyl ether, polyethylene glycol diacrylate, and photoinitiator as raw materials, prepared a POSS / PEGDA composite. S300: After mixing the POSS / PEGDA composite and polyether-modified organosilicon, an antistatic agent and a composite emulsifier are added. After shearing and emulsification, deionized water is added and the mixture is stirred evenly to obtain the wetting agent.

[0017] Specifically, step S100 involves adding hydroxyl-terminated polydimethylsiloxane, modified polyether, and catalyst to a reactor under an inert atmosphere, raising the temperature to 105-115℃, reacting at a constant temperature for 4-6 hours, adding an antioxidant, continuing to stir at a constant temperature for 1-2 hours, lowering the temperature to 55-65℃, adding anhydrous ethanol, filtering, and then obtaining polyether-modified organosilicon by rotary evaporation.

[0018] In this step, the inert atmosphere is nitrogen or argon, preferably nitrogen, which isolates the air and prevents the hydroxyl-terminated polydimethylsiloxane and modified polyether from being oxidized during the high-temperature reaction. It also avoids the inhibition of catalyst activity by oxygen, ensuring the smooth progress of the reaction. The catalyst is one or a mixture of several of the following: stannous octoate, dibutyltin dilaurate, zinc isooctanoate, tetrabutyl titanate, and monobutyltin oxide, preferably stannous octoate. The antioxidant is one or a mixture of several of the following: antioxidant 1010, antioxidant 1076, antioxidant 168, antioxidant 264, antioxidant 3114, and antioxidant BHT, preferably antioxidant 1010. The modified polyether is methyl allyl alcohol polyoxyethylene ether with a hydroxyl value of 21.0-26.0 mgKOH / g. The mass ratio of hydroxyl-terminated polydimethylsiloxane, modified polyether, catalyst, and antioxidant is 95-120:45-60:0.8-1.6:0.5-0.8. The rotary evaporation conditions are: temperature 60-70℃, vacuum degree 0.08-0.09MPa, and time 1-2h.

[0019] In this step, hydroxyl-terminated polydimethylsiloxane (viscosity ~750cSt) exhibits excellent lubricity and high-temperature resistance, but its hydrophilicity is poor. Therefore, a polyether is introduced to improve its emulsifying properties. The modified polyether is methyl allyl alcohol polyoxyethylene ether, which can undergo a grafting reaction with hydroxyl-terminated polydimethylsiloxane, further enhancing the hydrophilicity of the product and reducing interfacial tension.

[0020] Specifically, step S200 is as follows: S210. Add octahydroxybutyl-POSS and octyl glycidyl ether to the reactor, mix well, add polyethylene glycol diacrylate, continue stirring for 10-20 min, add ethanol aqueous solution, shear at high speed for 20-30 min, add photoinitiator, continue stirring for 6-10 min to obtain pre-dispersion. S220. Transfer the pre-dispersion liquid to a mold, place it in a UV curing oven, and irradiate at room temperature for 15-20 minutes. After photocuring and crosslinking, wash it 2-3 times with an ethanol-water solution, and then dry it in a vacuum drying oven at 60-70℃ for 2-3 hours. After pulverizing, pass it through a 200-mesh sieve to obtain the POSS / PEGDA composite.

[0021] In step S210, the photoinitiator is 2-hydroxy-2-methylphenylacetone, and the mass ratio of octahydroxybutyl-POSS, octyl glycidyl ether, polyethylene glycol diacrylate, and photoinitiator is 25-40:12-20:35-50:1-3; the high-speed shear rate is 2000-2500 r / min; in step S220, the ultraviolet curing conditions are: ultraviolet wavelength of 300 nm and light intensity of 64 mW / cm². 2 .

[0022] In this step, octahydroxybutyl-POSS (99% purity) and octyl glycidyl ether (99% purity) are mixed to form a low surface energy liquid mixture, which is then dispersed into nanoscale droplets after high-speed shearing. The ester groups in polyethylene glycol diacrylate (average molecular weight 400) can form hydrogen bonds with octahydroxybutyl-POSS molecules, causing it to adsorb onto the droplet surface and preventing the aggregation of low surface energy components. Under ultraviolet light irradiation, the photoinitiator decomposes to generate free radicals, causing the double bonds in polyethylene glycol diacrylate to undergo ring-opening polymerization to form a three-dimensional cross-linked network. This network encapsulates the octahydroxybutyl-POSS and octyl glycidyl ether mixture in situ, forming a micro-oil capsule complex, i.e., the POSS / PEGDA complex, which effectively prevents the migration and loss of low surface energy components.

[0023] Specifically, step S300 involves adding a POSS / PEGDA composite and polyether-modified organosilicon to a reactor, raising the temperature to 55-65°C, stirring for 20-40 minutes, lowering the temperature to 35-45°C, adding an antistatic agent and a composite emulsifier, emulsifying at high speed for 40-50 minutes, adding deionized water, and mixing thoroughly to obtain the wetting agent.

[0024] In this step, the antistatic agent is one or a mixture of several of hexadecyltrimethylammonium chloride, octadecyltrimethylammonium chloride, dodecyltrimethylammonium chloride, hexadecyldimethylbenzylammonium chloride, and dioctadecyldimethylammonium chloride, preferably hexadecyltrimethylammonium chloride; The composite emulsifier is obtained by compounding lauryl alcohol polyoxyethylene ether and polyethylene glycol monostearate at a mass ratio of 1-3:1, preferably at a mass ratio of 2:1. Lauryl alcohol polyoxyethylene ether is highly hydrophilic, which can improve the water solubility of the system and reduce interfacial tension. Polyethylene glycol monostearate is highly hydrophobic, which can combine with the hydrophobic groups of polyether-modified organosilicon and POSS / PEGDA complex to prevent aggregation. The two have a good synergistic emulsifying effect and can effectively improve the stability of the emulsion. The mass ratio of POSS / PEGDA complex, polyether-modified organosilicon, antistatic agent and composite emulsifier is 25-40:95-125:6-10:9-15. The condition for adding deionized water is that the rate of adding deionized water is 10-20 g / min to avoid emulsion demulsification caused by adding water too quickly.

[0025] In this process, the hydrophilic segments of the polyether-modified organosilicon form hydrogen bonds with the hydrophilic portion of the POSS / PEGDA complex, while the hydrophobic segments interact with the hydrophobic portion of the POSS / PEGDA complex, enhancing compatibility with the micro-oil bladder complex. The addition of the cationic antistatic agent hexadecyltrimethylammonium chloride allows its long-chain alkyl groups to be directionally adsorbed onto the hydrophobic groups of polyester fibers. The cationic groups also form electrostatic interactions with the hydrophilic groups on the surface of the emulsifier and micro-oil bladders, achieving both long-lasting antistatic effects and synergistically improving system stability. The compounded emulsifier, through the synergistic effect of its hydrophilic / hydrophobic segments, adsorbs onto the surface of the micro-oil bladders, forming a stable adsorption layer that prevents micro-oil bladder aggregation and stratification, ensuring the dispersion stability of the system.

[0026] Example 1 A method for preparing a low interfacial tension polyester high-speed spinning sizing agent includes the following steps: S1. Under a nitrogen atmosphere, 110g of hydroxyl-terminated polydimethylsiloxane, 55g of methyl allyl alcohol polyoxyethylene ether, and 1.2g of stannous octoate were added to a reactor. The temperature was raised to 110℃ and reacted at a constant temperature for 5h. Then, 0.65g of antioxidant 1010 was added, and the mixture was stirred at a constant temperature for 2h. The temperature was lowered to 60℃, and 21g of anhydrous ethanol was added. After filtration, the mixture was rotary evaporated at a temperature of 65℃ and a vacuum of 0.08MPa for 1.5h to obtain polyether-modified organosilicon. S2. Add 30g of octahydroxybutyl-POSS and 15g of octyl glycidyl ether to the reactor, mix well, add 40g of polyethylene glycol diacrylate, continue stirring for 15min, add 120g of 75% ethanol solution, shear at 2500r / min for 25min, add 2.0g of 2-hydroxy-2-methylphenylacetone, and continue stirring at 250r / min for 8min to obtain a pre-dispersion. S3. Transfer the pre-dispersion liquid to a mold and place it in a UV curing chamber at a wavelength of 300nm and a light intensity of 64mW / cm².2 After being irradiated at room temperature for 18 min and photocured for crosslinking, the product was washed three times with an ethanol-water solution, dried in a vacuum drying oven at 65℃ for 2.5 h, pulverized, and passed through a 200-mesh sieve to obtain the POSS / PEGDA composite. S4. Add 30g of POSS / PEGDA composite and 120g of polyether-modified organosilicon to the reactor, raise the temperature to 60℃, stir for 30min, lower the temperature to 40℃, add 8.0g of hexadecyltrimethylammonium chloride and 12g of composite emulsifier (lauryl alcohol polyoxyethylene ether and polyethylene glycol monostearate are compounded at a mass ratio of 2:1), emulsify at a high speed of 2500r / min for 45min, then add 700g of deionized water at a speed of 15g / min while stirring at a speed of 350r / min. After the water is added, continue stirring for 12min. After mixing evenly, the wetting agent is obtained.

[0027] Example 2 A method for preparing a low interfacial tension polyester high-speed spinning sizing agent includes the following steps: S1. Under a nitrogen atmosphere, 95g of hydroxyl-terminated polydimethylsiloxane, 45g of methyl allyl alcohol polyoxyethylene ether, and 0.8g of stannous octoate were added to a reactor. The temperature was raised to 105℃ and reacted at a constant temperature for 4 hours. Then, 0.5g of antioxidant 1010 was added, and the mixture was stirred at a constant temperature for another 1 hour. The temperature was lowered to 55℃, and 21g of anhydrous ethanol was added. After filtration, the mixture was rotary evaporated at a temperature of 55℃ and a vacuum of 0.08MPa for 1 hour to obtain polyether-modified organosilicon. S2. Add 25g of octahydroxybutyl-POSS and 12g of octyl glycidyl ether to the reactor, mix well, add 35g of polyethylene glycol diacrylate, continue stirring for 10min, add 95g of 75% ethanol solution, shear at 2000r / min for 20min, add 1.0g of 2-hydroxy-2-methylphenylacetone, and continue stirring at 200r / min for 6min to obtain a pre-dispersion. S3. Transfer the pre-dispersion liquid to a mold and place it in a UV curing chamber at a wavelength of 300nm and a light intensity of 64mW / cm². 2 After being irradiated at room temperature for 15 min and photocured for crosslinking, the product was washed twice with an ethanol-water solution and then dried in a vacuum drying oven at 60℃ for 2 h. After being pulverized, the product was passed through a 200-mesh sieve to obtain the POSS / PEGDA composite. S4. Add 25g of POSS / PEGDA composite and 95g of polyether-modified organosilicon to the reactor, raise the temperature to 55℃, stir for 20min, lower the temperature to 35℃, add 6.0g of hexadecyltrimethylammonium chloride and 9g of composite emulsifier (lauryl alcohol polyoxyethylene ether and polyethylene glycol monostearate are compounded at a mass ratio of 2:1), emulsify at a high speed of 2000r / min for 40min, then add 650g of deionized water at a speed of 10g / min while stirring at a speed of 300r / min. After the water is added, continue stirring for 15min. After mixing evenly, the wetting agent is obtained.

[0028] Example 3 A method for preparing a low interfacial tension polyester high-speed spinning sizing agent includes the following steps: S1. Under a nitrogen atmosphere, 120g of hydroxyl-terminated polydimethylsiloxane, 60g of methyl allyl alcohol polyoxyethylene ether, and 1.6g of stannous octoate were added to a reactor. The temperature was raised to 115℃ and reacted at a constant temperature for 6h. 0.8g of antioxidant 1010 was added, and the mixture was stirred at a constant temperature for 2h. The temperature was lowered to 65℃, and 23g of anhydrous ethanol was added. After filtration, the mixture was rotary evaporated at a temperature of 70℃ and a vacuum of 0.09MPa for 2h to obtain polyether-modified organosilicon. S2. Add 40g of octahydroxybutyl-POSS and 20g of octyl glycidyl ether to the reactor, mix well, add 50g of polyethylene glycol diacrylate, continue stirring for 20min, add 135g of 75% ethanol solution, shear at 2500r / min for 30min, add 3.0g of 2-hydroxy-2-methylphenylacetone, and continue stirring at 250r / min for 8min to obtain a pre-dispersion. S3. Transfer the pre-dispersion liquid to a mold and place it in a UV curing chamber at a wavelength of 300nm and a light intensity of 64mW / cm². 2 After being irradiated at room temperature for 20 min and photocured for crosslinking, the product was washed three times with an ethanol-water solution and then dried in a vacuum drying oven at 70℃ for 3 h. After being pulverized, the product was passed through a 200-mesh sieve to obtain the POSS / PEGDA composite. S4. Add 40g of POSS / PEGDA composite and 125g of polyether-modified organosilicon to the reactor, raise the temperature to 65℃, stir for 40min, lower the temperature to 45℃, add 10.0g of hexadecyltrimethylammonium chloride and 15g of composite emulsifier (lauryl alcohol polyoxyethylene ether and polyethylene glycol monostearate are compounded at a mass ratio of 2:1), emulsify at a high speed of 2500r / min for 50min, then add 720g of deionized water at a speed of 20g / min while stirring at a speed of 400r / min. After the water is added, continue stirring for 15min. After mixing evenly, the wetting agent is obtained.

[0029] Example 4 A method for preparing a low interfacial tension polyester high-speed spinning sizing agent includes the following steps: S1. Under a nitrogen atmosphere, 100g of hydroxyl-terminated polydimethylsiloxane, 50g of methyl allyl alcohol polyoxyethylene ether, and 1.0g of stannous octoate were added to a reactor. The temperature was raised to 110℃ and reacted at a constant temperature for 5h. Then, 0.55g of antioxidant 1010 was added, and the mixture was stirred at a constant temperature for 2h. The temperature was lowered to 60℃, and 19g of anhydrous ethanol was added. After filtration, the mixture was rotary evaporated at a temperature of 65℃ and a vacuum of 0.08MPa for 1.5h to obtain polyether-modified organosilicon. S2. Add 35g of octahydroxybutyl-POSS and 18g of octyl glycidyl ether to the reactor, mix well, add 45g of polyethylene glycol diacrylate, continue stirring for 15min, add 125g of 75% ethanol solution, shear at 2500r / min for 25min, add 2.2g of 2-hydroxy-2-methylphenylacetone, continue stirring at 250r / min for 8min to obtain a pre-dispersion. S3. Transfer the pre-dispersion liquid to a mold and place it in a UV curing chamber at a wavelength of 300nm and a light intensity of 64mW / cm². 2 After being irradiated at room temperature for 18 min and photocured for crosslinking, the product was washed three times with an ethanol-water solution, dried in a vacuum drying oven at 65℃ for 2.5 h, pulverized, and passed through a 200-mesh sieve to obtain the POSS / PEGDA composite. S4. Add 35g of POSS / PEGDA composite and 105g of polyether-modified organosilicon to the reactor, raise the temperature to 60℃, stir for 30min, lower the temperature to 40℃, add 9.0g of hexadecyltrimethylammonium chloride and 14.1g of composite emulsifier (lauryl alcohol polyoxyethylene ether and polyethylene glycol monostearate are compounded at a mass ratio of 2:1), emulsify at a high speed of 2500r / min for 45min, then add 700g of deionized water at a speed of 15g / min while stirring at a speed of 350r / min. After the water is added, continue stirring for 12min. After mixing evenly, the wetting agent is obtained.

[0030] Comparative Example 1 Compared with Example 1, this comparative example did not add the POSS / PEGDA complex during the preparation process, but all other aspects were the same as in Example 1.

[0031] Comparative Example 2 Compared with Example 1, this comparative example does not add polyether-modified organosilicon during the preparation process, while all other aspects are the same as in Example 1.

[0032] Comparative Example 3 Compared with Example 1, this comparative example uses polyether-modified organosilicon instead of hydroxyl-terminated polydimethylsiloxane in the preparation process, while all other aspects are the same as in Example 1.

[0033] Comparative Example 4 Compared with Example 1, this comparative example uses a single emulsifier, lauryl alcohol polyoxyethylene ether, instead of a composite emulsifier, in the preparation process. All other aspects are the same as in Example 1.

[0034] Comparative Example 5 Compared with Example 1, this comparative example does not involve UV curing during the preparation process, but all other aspects are the same as in Example 1.

[0035] The wetting agents prepared in Examples 1 to 4 and Comparative Examples 1 to 5 were subjected to relevant performance tests: Stability: Each prepared wetting agent sample was placed in a sealed test tube and left to stand at room temperature for 72 hours to observe whether stratification occurred.

[0036] Surface tension: The surface tension (mN / m) of each wetting agent sample was measured using a ZL-2 automatic surface tension meter at a temperature of 30℃.

[0037] Wetting rate: The wetting rate of each wetting agent sample was tested using the canvas sedimentation method at a temperature of 30℃.

[0038] Oil film strength: The oil film strength of each prepared wetting agent sample was tested according to the relevant provisions in GB / T3142-82.

[0039] Volatilization loss rate: Weigh 5g of each prepared wetting agent sample and place it in a 150℃ oven for 2 hours. Then place it in a desiccator to cool to room temperature, weigh it, and calculate the volatile loss rate.

[0040] The results of the above performance tests are shown in Table 1.

[0041] Table 1 Relevant performance test results The test results above show that the surface tension of the sizing agent prepared in the examples is lower than that in the comparative examples, which can effectively improve the wetting effect of the sizing agent on polyester fibers. Furthermore, the examples are superior to the comparative examples in terms of stability and high-temperature resistance, and can adapt to the high-temperature and continuous operation conditions of high-speed spinning. A comparison of the test data between Comparative Example 1 (without POSS / PEGDA complex) and Example 1 shows that the POSS / PEGDA complex with a microcapsule structure can effectively improve the stability of the emulsion, reduce interfacial tension, enhance oil film strength, and reduce volatile loss. A comparison of the test data between Comparative Example 2 (without polyether-modified silicone) and Example 1 shows that polyether-modified silicone, as the main lubricating and emulsifying component, plays an important role in the lubricity of the system and the stability of the emulsion. A comparison of the test data between Comparative Example 3 (replacing polyether-modified silicone with hydroxyl-terminated polydimethylsiloxane) and Example 1 shows that directly using... Unmodified organosilicon has poor hydrophilicity and emulsification, resulting in poor compatibility with the system and thus a decline in related performance. A comparison of the test data of Comparative Example 4 (with the composite emulsifier replaced by a single emulsifier) ​​and Example 1 shows that the composite emulsifier has a synergistic effect on stabilizing complex multiphase emulsion systems, while a single emulsifier is difficult to stabilize both hydrophilic and hydrophobic components simultaneously, leading to a decline in performance. A comparison of the test data of Comparative Example 5 (without UV curing) and Example 1 shows that UV curing forms a cross-linked network, which can effectively encapsulate low surface energy substances, preventing their migration and loss, and achieving long-term effectiveness of the wetting agent.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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 process, method, article, or apparatus.

[0043] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a low interfacial tension polyester high-speed spinning sizing agent, characterized in that, Includes the following steps: S100: Polyether-modified organosilicon is prepared by using raw materials including hydroxyl-terminated polydimethylsiloxane, modified polyether, catalyst, and antioxidant. S200, using octahydroxybutyl-POSS, octyl glycidyl ether, polyethylene glycol diacrylate, and photoinitiator as raw materials, prepared a POSS / PEGDA composite. S300: After mixing the POSS / PEGDA composite and polyether-modified organosilicon, an antistatic agent and a composite emulsifier are added. After shearing and emulsification, deionized water is added and the mixture is stirred evenly to obtain the wetting agent.

2. The method for preparing a low interfacial tension polyester high-speed spinning sizing agent according to claim 1, characterized in that, Step S100 is as follows: under an inert atmosphere, add hydroxyl-terminated polydimethylsiloxane, modified polyether, and catalyst to the reactor, raise the temperature to 105-115℃, and react at a constant temperature for 4-6 hours. Add an antioxidant, continue stirring at a constant temperature for 1-2 hours, lower the temperature to 55-65℃, add anhydrous ethanol, filter, and then obtain polyether-modified organosilicon by rotary evaporation.

3. The method for preparing a low interfacial tension polyester high-speed spinning sizing agent according to claim 2, characterized in that, The catalyst is one or a mixture of several of the following: stannous octoate, dibutyltin dilaurate, zinc isooctanoate, tetrabutyl titanate, and monobutyltin oxide; the antioxidant is one or a mixture of several of the following: antioxidant 1010, antioxidant 1076, antioxidant 168, antioxidant 264, antioxidant 3114, and antioxidant BHT.

4. The method for preparing a low interfacial tension polyester high-speed spinning sizing agent according to claim 2, characterized in that, The modified polyether is methyl allyl alcohol polyoxyethylene ether.

5. The method for preparing a low interfacial tension polyester high-speed spinning sizing agent according to claim 1, characterized in that, Step S200 is as follows: S210. Add octahydroxybutyl-POSS and octyl glycidyl ether to the reactor, mix well, add polyethylene glycol diacrylate, continue stirring for 10-20 min, add ethanol aqueous solution, shear at high speed for 20-30 min, add photoinitiator, continue stirring for 6-10 min to obtain pre-dispersion. S220. Transfer the pre-dispersion liquid to a mold, place it in an ultraviolet curing chamber, and irradiate it at room temperature for 15-20 minutes. After photocuring and crosslinking, wash, dry, pulverize, and sieve to obtain the POSS / PEGDA composite.

6. The method for preparing a low interfacial tension polyester high-speed spinning sizing agent according to claim 1, characterized in that, Step S300 specifically involves: adding POSS / PEGDA composite and polyether-modified organosilicon to the reactor, raising the temperature to 55-65°C, stirring for 20-40 minutes, lowering the temperature to 35-45°C, adding antistatic agent and composite emulsifier, emulsifying at high speed for 40-50 minutes, adding deionized water, and mixing evenly to obtain the impregnating agent.

7. The method for preparing a low interfacial tension polyester high-speed spinning sizing agent according to claim 6, characterized in that, The antistatic agent is one or a mixture of several of the following: hexadecyltrimethylammonium chloride, octadecyltrimethylammonium chloride, dodecyltrimethylammonium chloride, hexadecyldimethylbenzylammonium chloride, and dioctadecyldimethylammonium chloride.

8. The method for preparing a low interfacial tension polyester high-speed spinning sizing agent according to claim 6, characterized in that, The composite emulsifier is obtained by compounding lauryl alcohol polyoxyethylene ether and polyethylene glycol monostearate in a mass ratio of 1-3:

1.

9. A low interfacial tension polyester high-speed spinning sizing agent, characterized in that, It was prepared using the method described in any one of claims 1-8 for preparing a low interfacial tension polyester high-speed spinning sizing agent.

Images