Regenerated polyester and wool blended constant-temperature fabric and preparation method thereof

Abstract

The invention provides a regenerated polyester and wool blended constant-temperature fabric and a preparation method thereof, and belongs to the technical field of fabrics. A silane coupling agent modified halloysite nanotube, surface coupled 2-amino benzophenone and amino indocyanine green and capric acid embedded in an acrylic monomer are prepared into microcapsules, the microcapsules and a CdS coated UiO-66-NH2 composite material are mixed and added into modified molten PET resin to prepare modified regenerated polyester yarn, the modified regenerated polyester yarn is mixed with wool yarn, blended yarn is processed through combing and ring spinning procedures, and the modified regenerated polyester yarn is woven into the wool yarn. The regenerated polyester and wool blended constant-temperature fabric is prepared through the processes of fabric boiling, mercerizing, dyeing, sizing, preshrinking, singeing and wool etching. The regenerated polyester and wool blended constant-temperature fabric prepared by the invention has better antibacterial, heat-insulating and heat-conducting properties and excellent mechanical strength, and has a wide application prospect.

Description

Technical Field

[0001] The present invention relates to the technical field of fabrics, and in particular to a regenerated polyester and wool blended constant temperature fabric and a preparation method thereof. Background Art

[0002] Recycled polyester staple fiber (RPSF) is made from polyester fabric, waste polyester bottle flakes, spinning waste, foam material, and pulp. The flakes are crushed and cleaned, and the resulting mixture is dried, melt-extruded, spun, wound, bundled, drawn, crimped (with lubricants added during crimping depending on customer needs), relaxed, heat-set, and cut to produce polyester staple fibers of varying lengths. Lengths typically range from 32 to 102 mm, with deniers ranging from 1.5D to 20D. This fully utilizes recycled resources and has a broad market due to its low cost and high performance. Recycled polyester staple fiber comes in many varieties, including standard, hollow, triangular, and flame-retardant fibers. However, while pure polyester fiber fabrics are wrinkle-resistant, they have low water absorption when sweating, causing sweat to adhere to the skin, leading to odor and bacterial growth. Summary of the Invention

[0003] The present invention aims to provide a regenerated polyester and wool blended constant temperature fabric and a preparation method thereof. Waste PET resin is melt-filtered to remove impurities. After being modified with a silane coupling agent containing an amino group, it can react with the epoxy group on the surface of the microcapsule together with the CdS@UiO-66-NH2 composite material. The resulting composite material has good dispersibility, is not prone to stratification and agglomeration, can effectively improve the antibacterial, heat preservation and heating, and thermal conductivity properties of the fabric, has good mechanical strength, and has broad application prospects.

[0004] The technical solution of the present invention is achieved as follows:

[0005] The invention provides a preparation method of a regenerated polyester and wool blended constant temperature fabric. The method comprises the following steps: modifying halloysite nanotubes with a silane coupling agent, coupling 2-aminobenzophenone and aminoindocyanine green on the surface, and embedding decanoic acid with an acrylic acid monomer to prepare microcapsules. The microcapsules are mixed with a CdS@UiO-66-NH2 composite material and added to a modified molten PET resin to prepare modified regenerated polyester yarn. The modified regenerated polyester yarn is mixed with wool yarn, processed into a blended yarn through combing and ring spinning processes, and woven into a grey fabric through a loom. The grey fabric is then boiled, mercerized, dyed, shaped, pre-shrinked, singed, and etched to prepare the regenerated polyester and wool blended constant temperature fabric.

[0006] As a further improvement of the present invention, the following steps are included:

[0007] S1. Preparation of modified halloysite nanotubes: halloysite nanotubes were added to ethanol, a composite silane coupling agent was added, the reaction was heated and stirred, centrifuged, washed, and dried to obtain modified halloysite nanotubes;

[0008] S2. Coupling: 2-aminobenzophenone and aminoindocyanine green were added to isopropanol, and the modified halloysite nanotubes were added. The reaction was heated with stirring, centrifuged, washed, and dried to obtain benzophenone / indocyanine green modified halloysite nanotubes.

[0009] S3. Preparation of microcapsules: Benzophenone / indocyanine green-modified halloysite nanotubes and an emulsifier were added to water. After the solution was foamed and emulsified, decanoic acid was added and stirred. Methyl methacrylate was added to form a polymer shell. An initiator and ethylene glycol dimethacrylate were added and the reaction was stirred. The mixture was filtered, washed, and dried to produce microcapsules.

[0010] S4. Preparation of CdS@UiO-66-NH2 composite material: UiO-66-NH2 and an aqueous solution of cadmium salt were added to n-hexane and ultrasonically dispersed. Ammonium sulfide was added, heated and stirred, and the reaction was completed by centrifugation, washing, and drying to obtain a CdS@UiO-66-NH2 composite material.

[0011] S5. Preparation of recycled polyester: Waste PET resin was heated and melted, filtered, and a silane coupling agent, CdS@UiO-66-NH2 composite material, and microcapsules were added. The mixture was stirred and mixed, extruded, and pelletized to obtain modified recycled polyester.

[0012] S6. Preparation of blended yarn: Modified regenerated polyester yarn is obtained by extrusion spinning, mixed evenly with wool yarn, and processed into blended yarn through combing and ring spinning steps;

[0013] S7. Fabric Preparation: The blended yarn is woven into grey fabric using a special weave on a loom. The fabric is then boiled, mercerized, dyed, shaped, pre-shrinked, singed, and etched to produce the recycled polyester and wool blended constant-temperature fabric.

[0014] As a further improvement of the present invention, the composite silane coupling agent in step S1 includes KH560 and a silane coupling agent with a double bond in a mass ratio of 5-7:2-3, the silane coupling agent with a double bond is selected from at least one of KH570, A171, and A151, the mass ratio of the halloysite nanotubes and the composite silane coupling agent is 10:2-3, the temperature of the heating and stirring reaction is 40-50°C, and the time is 1-3h.

[0015] As a further improvement of the present invention, in step S2, the mass ratio of 2-aminobenzophenone, aminoindocyanine green and modified halloysite nanotubes is 2-3:1-3:10, the heating and stirring reaction temperature is 75-85° C., and the time is 10-15 h.

[0016] As a further improvement of the present invention, the mass ratio of the benzophenone / indocyanine green modified halloysite nanotubes, emulsifier, decanoic acid, methyl methacrylate, initiator and ethylene glycol dimethacrylate in step S3 is 5-7:0.5-1:20-25:24-30:0.5-1:2-4, the initiator is selected from at least one of azobisisobutyronitrile, diethyl azodicarboxylate, sodium persulfate, potassium persulfate, and ammonium persulfate, the emulsifier is selected from at least one of sodium dodecyl sulfate, sodium dodecyl sulfonate, sodium dodecylbenzenesulfonate, sodium hexadecyl sulfate, sodium hexadecyl sulfonate, sodium hexadecylbenzenesulfonate, sodium octadecyl sulfate, sodium octadecyl sulfonate, and sodium octadecylbenzenesulfonate, the stirring reaction time is 3-5 hours, and the temperature is 80-90°C.

[0017] As a further improvement of the present invention, the mass ratio of UiO-66-NH2, cadmium salt and ammonium sulfide in step S4 is 10:3-5:2-3, the cadmium salt is cadmium chloride or cadmium nitrate, the temperature of the heating and stirring reaction is 45-55°C, and the time is 2-4h.

[0018] As a further improvement of the present invention, the heating and melting temperature in step S5 is 260-280° C., the mass ratio of the waste PET resin, silane coupling agent, CdS@UiO-66-NH2 composite material and microcapsule is 100:3-5:3-5:6-8, and the silane coupling agent is at least one of KH550, KH602, and KH792.

[0019] As a further improvement of the present invention, the mass ratio of the modified regenerated polyester yarn to the wool yarn in step S6 is 8-10:4-7.

[0020] As a further improvement of the present invention, the loom in step S7 is a double-sided circular loom, and the special weaving structure is double-sided warp knitting structure weaving.

[0021] The present invention further protects a regenerated polyester and wool blended constant temperature fabric prepared by the above preparation method.

[0022] The present invention has the following beneficial effects:

[0023] The present invention modifies halloysite nanotubes using a silane coupling agent containing double bonds and epoxy groups. The halloysite nanotubes are inorganic hollow nanotubes with a multi-walled structure and a high aspect ratio, exhibiting high mechanical strength, high thermal stability, and good thermal conductivity. The epoxy groups on their surfaces can undergo a ring-opening reaction with aminobenzophenone and aminoindocyanine green, thereby securing them to the surface of the halloysite nanotubes. This improves their fastness and washability in fabrics, significantly enhancing the fabric's UV resistance. Furthermore, aminoindocyanine green has a strong absorption capacity for near-infrared light and a high photothermal conversion efficiency, converting light energy irradiated on the fabric into thermal energy, thereby improving the fabric's thermal insulation and heat generation properties.

[0024] In addition, the double bonds on the surface of the modified halloysite nanotubes of the present invention can initiate polymerization with methyl methacrylate and ethylene glycol dimethacrylate to form a shell layer, and the phase change energy storage material decanoic acid is embedded in the microcapsules, so that the prepared microcapsules have good heat storage and heat preservation effects, thereby greatly improving the thermal insulation performance of the fabric.

[0025] MOFs are crystalline porous materials with a periodic network structure formed by self-assembly of metal ions or metal clusters and organic ligands. Compounding with CdS can significantly enhance photocatalytic activity. Cadmium sulfide (CdS) has a narrow band gap and can absorb visible light with a wavelength below 520nm, thereby further converting light energy into heat energy, further improving the thermal insulation and heating properties of the fabric. At the same time, compounding CdS with MOFs can avoid nanoparticle aggregation and improve the utilization rate of visible light. The heterojunction formed by the two structures is conducive to electron transport and reduces the recombination of photogenerated electrons and holes, thereby enhancing photocatalytic activity and having better photocatalytic antibacterial properties.

[0026] The present invention removes impurities from waste PET resin through melt filtration, and after modification with a silane coupling agent containing an amino group, the waste PET resin can react with the epoxy group on the surface of the microcapsule together with the CdS@UiO-66-NH2 composite material. The resulting composite material has good dispersibility, is not prone to stratification and agglomeration, can effectively improve the antibacterial, heat preservation and heating, and thermal conductivity properties of the fabric, has good mechanical strength, and has broad application prospects. DETAILED DESCRIPTION

[0027] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0028] Aminoindocyanine green, CAS number: 1686147-55-6, has the following structural formula:.

[0029] Example 1

[0030] This embodiment provides a method for preparing a regenerated polyester and wool blended constant temperature fabric, comprising the following steps:

[0031] S1. Preparation of modified halloysite nanotubes: 10 g of halloysite nanotubes were added to 200 mL of ethanol, 2 g of a composite silane coupling agent was added, the mixture was heated to 40°C, stirred for 1 h, centrifuged, washed, and dried to obtain modified halloysite nanotubes.

[0032] The composite silane coupling agent includes KH560 and A151 in a mass ratio of 5:2;

[0033] S2. Coupling: 2 g of 2-aminobenzophenone and 1 g of aminoindocyanine green were added to 200 mL of isopropanol, followed by 10 g of modified halloysite nanotubes. The mixture was heated to 75°C and stirred for 10 h. The mixture was centrifuged, washed, and dried to obtain benzophenone / indocyanine green-modified halloysite nanotubes.

[0034] S3. Preparation of microcapsules: 5 g of benzophenone / indocyanine green-modified halloysite nanotubes and 0.5 g of sodium octadecylbenzenesulfonate were added to 250 mL of water and stirred until the solution foamed and emulsified. 20 g of capric acid was then added and stirred for 30 min. 24 g of methyl methacrylate was then added to form a polymer shell. 0.5 g of sodium persulfate and 2 g of ethylene glycol dimethacrylate were then added. The reaction was stirred at 80°C for 3 h, filtered, washed, and dried to produce microcapsules.

[0035] S4. Preparation of CdS@UiO-66-NH2 composite material: 10 g of UiO-66-NH2 and 50 mL of an aqueous solution containing 3 g of cadmium chloride were added to 150 mL of n-hexane. Ultrasonic dispersion was performed at 1000 W for 20 min. 2 g of ammonium sulfide was added, and the mixture was heated to 45°C and stirred for 2 h. The reaction was then centrifuged, washed, and dried to obtain the CdS@UiO-66-NH2 composite material.

[0036] S5. Preparation of recycled polyester: 100 g of waste PET resin was melted at 260°C and filtered. 3 g of silane coupling agent KH792, 3 g of CdS@UiO-66-NH2 composite material, and 6 g of microcapsules were added and stirred for 30 min. The mixture was extruded and pelletized to produce modified recycled polyester.

[0037] S6 blended yarn preparation: 80g modified regenerated polyester extrusion spinning to obtain modified regenerated polyester yarn, mixed with 40g wool yarn, after combing, ring spinning process into a blended yarn;

[0038] S7. Fabric Preparation: The blended yarn is woven into a double-sided warp knitting fabric using a double-sided circular knitting machine. The fabric is then boiled, mercerized, dyed, shaped, pre-shrinked, singed, and etched to produce a recycled polyester and wool blended constant-temperature fabric.

[0039] Example 2

[0040] This embodiment provides a method for preparing a regenerated polyester and wool blended constant temperature fabric, comprising the following steps:

[0041] S1. Preparation of modified halloysite nanotubes: 10 g of halloysite nanotubes were added to 200 mL of ethanol, 3 g of a composite silane coupling agent was added, the mixture was heated to 50°C, stirred for 3 h, centrifuged, washed, and dried to obtain modified halloysite nanotubes.

[0042] The composite silane coupling agent includes KH560 and A171 in a mass ratio of 7:3;

[0043] S2. Coupling: 3 g of 2-aminobenzophenone and 3 g of aminoindocyanine green were added to 200 mL of isopropanol, followed by 10 g of modified halloysite nanotubes. The mixture was heated to 85°C and stirred for 15 h. The mixture was centrifuged, washed, and dried to obtain benzophenone / indocyanine green-modified halloysite nanotubes.

[0044] S3. Preparation of microcapsules: 7 g of benzophenone / indocyanine green-modified halloysite nanotubes and 1 g of sodium octadecyl sulfate were added to 250 mL of water and stirred until the solution foamed and emulsified. 25 g of capric acid was then added and stirred for 30 min. 30 g of methyl methacrylate was then added to form a polymer shell. 1 g of potassium persulfate and 4 g of ethylene glycol dimethacrylate were then added. The mixture was stirred at 90°C for 5 h, filtered, washed, and dried to produce microcapsules.

[0045] S4. Preparation of CdS@UiO-66-NH2 composite material: 10 g of UiO-66-NH2 and 50 mL of an aqueous solution containing 5 g of cadmium nitrate were added to 150 mL of n-hexane. Ultrasonic dispersion was performed at 1000 W for 20 min. 3 g of ammonium sulfide was added, and the mixture was heated to 55°C and stirred for 4 h. The reaction was then centrifuged, washed, and dried to obtain the CdS@UiO-66-NH2 composite material.

[0046] S5. Preparation of recycled polyester: 100 g of waste PET resin was melted at 280°C and filtered. 5 g of silane coupling agent KH602, 5 g of CdS@UiO-66-NH2 composite material, and 8 g of microcapsules were added. The mixture was stirred for 30 min, extruded, and pelletized to produce modified recycled polyester.

[0047] S6 blended yarn preparation: 100g modified regenerated polyester extrusion spinning to obtain modified regenerated polyester yarn, mixed with 70g wool yarn, after combing, ring spinning process into a blended yarn;

[0048] S7. Fabric Preparation: The blended yarn is woven into a double-sided warp knitting fabric using a double-sided circular knitting machine. The fabric is then boiled, mercerized, dyed, shaped, pre-shrinked, singed, and etched to produce a recycled polyester and wool blended constant-temperature fabric.

[0049] Example 3

[0050] This embodiment provides a method for preparing a regenerated polyester and wool blended constant temperature fabric, comprising the following steps:

[0051] S1. Preparation of modified halloysite nanotubes: 10 g of halloysite nanotubes were added to 200 mL of ethanol, 2.5 g of a composite silane coupling agent was added, the mixture was heated to 45°C, stirred for 2 h, centrifuged, washed, and dried to obtain modified halloysite nanotubes.

[0052] The composite silane coupling agent includes KH560 and KH570, with a mass ratio of 6:2.5;

[0053] S2. Coupling: 2.6 g of 2-aminobenzophenone and 2 g of aminoindocyanine green were added to 200 mL of isopropanol, followed by 10 g of modified halloysite nanotubes. The mixture was heated to 80°C and stirred for 13 h. The mixture was centrifuged, washed, and dried to obtain benzophenone / indocyanine green-modified halloysite nanotubes.

[0054] S3. Preparation of microcapsules: 6 g of benzophenone / indocyanine green-modified halloysite nanotubes and 0.7 g of sodium dodecyl sulfate were added to 250 mL of water and stirred until the solution foamed and emulsified. 23 g of decanoic acid was then added and stirred for 30 min. 27 g of methyl methacrylate was then added to form a polymer shell. 0.8 g of azobisisobutyronitrile and 3 g of ethylene glycol dimethacrylate were then added. The mixture was stirred at 85°C for 4 h, filtered, washed, and dried to produce microcapsules.

[0055] S4. Preparation of CdS@UiO-66-NH2 composite material: 10 g of UiO-66-NH2 and 50 mL of an aqueous solution containing 4 g of cadmium chloride were added to 150 mL of n-hexane. Ultrasonic dispersion was performed at 1000 W for 20 min. 2.5 g of ammonium sulfide was added, and the mixture was heated to 50°C and stirred for 3 h. The reaction was then centrifuged, washed, and dried to obtain the CdS@UiO-66-NH2 composite material.

[0056] S5. Preparation of recycled polyester: 100 g of waste PET resin was melted at 270°C and filtered. 4 g of silane coupling agent KH550, 4 g of CdS@UiO-66-NH2 composite material, and 7 g of microcapsules were added. The mixture was stirred for 30 min, extruded, and pelletized to produce modified recycled polyester.

[0057] S6 blended yarn preparation: 90g modified regenerated polyester extrusion spinning to obtain modified regenerated polyester yarn, mixed with 55g wool yarn, after combing, ring spinning process into a blended yarn;

[0058] S7. Fabric Preparation: The blended yarn is woven into a double-sided warp knitting fabric using a double-sided circular knitting machine. The fabric is then boiled, mercerized, dyed, shaped, pre-shrinked, singed, and etched to produce a recycled polyester and wool blended constant-temperature fabric.

[0059] Comparative Example 1

[0060] Compared with Example 3, the difference is that 2-aminobenzophenone is not added in step S2.

[0061] The details are as follows:

[0062] S2. Coupling: Add 4.6 g of aminoindocyanine green to 200 mL of isopropanol, add 10 g of modified halloysite nanotubes, heat to 80°C, stir and react for 13 h, centrifuge, wash, and dry to obtain indocyanine green-modified halloysite nanotubes.

[0063] Comparative Example 2

[0064] Compared with Example 3, the difference is that aminoindocyanine green is not added in step S2.

[0065] The details are as follows:

[0066] S2. Coupling: 4.6 g of 2-aminobenzophenone was added to 200 mL of isopropanol, and 10 g of modified halloysite nanotubes was added. The mixture was heated to 80°C and stirred for 13 h. The mixture was centrifuged, washed, and dried to obtain benzophenone-modified halloysite nanotubes.

[0067] Comparative Example 3

[0068] Compared with embodiment 3, the difference is that step S2 is not performed.

[0069] The details are as follows:

[0070] S1. Preparation of modified halloysite nanotubes: 10 g of halloysite nanotubes were added to 200 mL of ethanol, 2.5 g of a composite silane coupling agent was added, the mixture was heated to 45°C, stirred for 2 h, centrifuged, washed, and dried to obtain modified halloysite nanotubes.

[0071] The composite silane coupling agent includes KH560 and KH570, with a mass ratio of 6:2.5;

[0072] S2. Preparation of microcapsules: 6 g of modified halloysite nanotubes and 0.7 g of sodium dodecyl sulfate were added to 250 mL of water and stirred until the solution foamed and emulsified. 23 g of decanoic acid was then added and stirred for 30 min. 27 g of methyl methacrylate was then added to form a polymer shell. 0.8 g of azobisisobutyronitrile and 3 g of ethylene glycol dimethacrylate were then added. The mixture was stirred at 85°C for 4 h, filtered, washed, and dried to produce microcapsules.

[0073] S3. Preparation of CdS@UiO-66-NH2 composite material: 10 g of UiO-66-NH2 and 50 mL of an aqueous solution containing 4 g of cadmium chloride were added to 150 mL of n-hexane. Ultrasonic dispersion was performed at 1000 W for 20 min. 2.5 g of ammonium sulfide was added, and the mixture was heated to 50°C and stirred for 3 h. The reaction was then centrifuged, washed, and dried to obtain the CdS@UiO-66-NH2 composite material.

[0074] S4. Preparation of recycled polyester: 100 g of waste PET resin was melted at 270°C and filtered. 4 g of silane coupling agent KH550, 4 g of CdS@UiO-66-NH2 composite material, and 7 g of microcapsules were added. The mixture was stirred for 30 min, extruded, and pelletized to produce modified recycled polyester.

[0075] S5 blended yarn preparation: 90g modified regenerated polyester extrusion spinning to obtain modified regenerated polyester yarn, mixed with 55g wool yarn, after combing, ring spinning process into a blended yarn;

[0076] S6. Fabric Preparation: The blended yarn is woven into a double-sided warp knitting fabric using a double-sided circular knitting machine. The fabric is then boiled, mercerized, dyed, shaped, pre-shrinked, singed, and etched to produce a recycled polyester and wool blended constant-temperature fabric.

[0077] Comparative Example 4

[0078] Compared with embodiment 3, the difference is that step S3 is not performed.

[0079] The details are as follows:

[0080] S1. Preparation of modified halloysite nanotubes: 10 g of halloysite nanotubes were added to 200 mL of ethanol, 2.5 g of a composite silane coupling agent was added, the mixture was heated to 45°C, stirred for 2 h, centrifuged, washed, and dried to obtain modified halloysite nanotubes.

[0081] The composite silane coupling agent includes KH560 and KH570, with a mass ratio of 6:2.5;

[0082] S2. Coupling: 2.6 g of 2-aminobenzophenone and 2 g of aminoindocyanine green were added to 200 mL of isopropanol, followed by 10 g of modified halloysite nanotubes. The mixture was heated to 80°C and stirred for 13 h. The mixture was centrifuged, washed, and dried to obtain benzophenone / indocyanine green-modified halloysite nanotubes.

[0083] S3. Preparation of CdS@UiO-66-NH2 composite material: 10 g of UiO-66-NH2 and 50 mL of an aqueous solution containing 4 g of cadmium chloride were added to 150 mL of n-hexane. Ultrasonic dispersion was performed at 1000 W for 20 min. 2.5 g of ammonium sulfide was added, and the mixture was heated to 50°C and stirred for 3 h. The reaction was then centrifuged, washed, and dried to obtain the CdS@UiO-66-NH2 composite material.

[0084] S4. Preparation of recycled polyester: 100 g of waste PET resin was melted at 270°C and filtered. 4 g of silane coupling agent KH550, 4 g of CdS@UiO-66-NH2 composite material, and 7 g of benzophenone / indocyanine green-modified halloysite nanotubes were added. The mixture was stirred for 30 minutes, extruded, and pelletized to produce modified recycled polyester.

[0085] S5 blended yarn preparation: 90g modified regenerated polyester extrusion spinning to obtain modified regenerated polyester yarn, mixed with 55g wool yarn, after combing, ring spinning process into a blended yarn;

[0086] S6. Fabric Preparation: The blended yarn is woven into a double-sided warp knitting fabric using a double-sided circular knitting machine. The fabric is then boiled, mercerized, dyed, shaped, pre-shrinked, singed, and etched to produce a recycled polyester and wool blended constant-temperature fabric.

[0087] Comparative Example 5

[0088] Compared with Example 3, the difference is that the CdS@UiO-66-NH2 composite material is not added in step S5.

[0089] The details are as follows:

[0090] S5. Preparation of recycled polyester: 100 g of waste PET resin was heated to 270°C to melt, filtered, and 4 g of silane coupling agent KH550 and 11 g of microcapsules were added. The mixture was stirred for 30 minutes, extruded, and pelletized to produce modified recycled polyester.

[0091] Comparative Example 6

[0092] Compared with Example 3, the difference is that no microcapsules are added in step S5.

[0093] The details are as follows:

[0094] S5. Preparation of recycled polyester: 100 g of waste PET resin was melted at 270°C and filtered. 4 g of silane coupling agent KH550 and 11 g of CdS@UiO-66-NH2 composite were added and stirred for 30 minutes. The mixture was extruded and pelletized to produce modified recycled polyester.

[0095] Test Example 1

[0096] The performance of the regenerated polyester and wool blended thermostatic fabrics prepared in Examples 1-3 and Comparative Examples 1-6 was tested. The results are shown in Table 1.

[0097] Bacterial inhibition rate: Quantitative antibacterial testing was conducted according to the national standard GB / T 20944.2-2007, "Evaluation of the Antimicrobial Properties of Textiles - Part 2: Absorption Method." Antimicrobial performance was compared before and after 100 washes. The washing method followed the guidelines set forth in GB / T 8629-2001, "Household Washing and Drying Procedures for Textile Testing," using a Type B agitator washing machine and wash cycle 8B. Bacterial strains used: Escherichia coli ATCC 25922; Candida albicans ATCC 10231.

[0098] UV protection performance: Refer to "GB / T 18830-2009 Evaluation of UV protection performance of textiles" to test the UV protection factor and UV transmittance of textiles.

[0099] Air permeability: Refer to GB / T 5453-1997 “Determination of air permeability of textile fabrics” and use an air permeability tester to test the air permeability of the sample. Repeat the test 5 times at different parts of the same sample and take the average value.

[0100] Table 1

[0101]

[0102] As can be seen from the above table, the regenerated polyester and wool blended constant temperature fabrics prepared in Examples 1-3 of the present invention have good air permeability, UV resistance and antibacterial properties, and good water resistance.

[0103] Test Example 2

[0104] The performance of the regenerated polyester and wool blended thermostatic fabrics prepared in Examples 1-3 and Comparative Examples 1-6 was tested. The results are shown in Table 2.

[0105] Mechanical properties were tested according to GB / T 21295-2024, "Technical Requirements for Physical and Chemical Properties of Clothing." Abrasion resistance was evaluated according to ASTM D4966-2010, "Test Methods for Abrasion Resistance of Textiles." Thermal insulation was evaluated according to GB 11048-1989, "Test Methods for Thermal Insulation of Textiles."

[0106] Table 2

[0107]

[0108] It can be seen from the above table that the regenerated polyester wool blended constant temperature fabrics prepared in Examples 1-3 of the present invention have good wear resistance and mechanical strength, and at the same time, good thermal insulation performance.

[0109] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for preparing a regenerated polyester and wool blended constant temperature fabric, characterized in that: Halloysite nanotubes were modified with a silane coupling agent, and 2-aminobenzophenone and aminoindocyanine green were coupled on the surface. Decanoic acid was then embedded in acrylic acid monomer to prepare microcapsules. The microcapsules were mixed with CdS@UiO-66-NH2 composite materials and added to modified molten PET resin to produce modified regenerated polyester yarn. The yarn was then mixed with wool yarn and processed into blended yarn through combing and ring spinning. The yarn was then woven into grey fabric on a loom. The regenerated polyester and wool blended constant temperature fabric was produced through the processes of boiling, mercerizing, dyeing, shaping, pre-shrinking, singeing, and etching.

2. The preparation method according to claim 1, characterized in that The following steps are involved: S1. Preparation of modified halloysite nanotubes: halloysite nanotubes were added to ethanol, a composite silane coupling agent was added, the reaction was heated and stirred, centrifuged, washed, and dried to obtain modified halloysite nanotubes; S2. Coupling: 2-aminobenzophenone and aminoindocyanine green were added to isopropanol, and the modified halloysite nanotubes were added. The reaction was heated with stirring, centrifuged, washed, and dried to obtain benzophenone / indocyanine green modified halloysite nanotubes. S3. Preparation of microcapsules: Benzophenone / indocyanine green-modified halloysite nanotubes and an emulsifier were added to water. After the solution was foamed and emulsified, decanoic acid was added and stirred. Methyl methacrylate was added to form a polymer shell. An initiator and ethylene glycol dimethacrylate were added and the reaction was stirred. The mixture was filtered, washed, and dried to produce microcapsules. S4. Preparation of CdS@UiO-66-NH2 composite material: UiO-66-NH2 and an aqueous solution of cadmium salt were added to n-hexane and ultrasonically dispersed. Ammonium sulfide was added, heated and stirred, and the reaction was completed by centrifugation, washing, and drying to obtain a CdS@UiO-66-NH2 composite material. S5. Preparation of recycled polyester: Waste PET resin was heated and melted, filtered, and a silane coupling agent, CdS@UiO-66-NH2 composite material, and microcapsules were added. The mixture was stirred and mixed, extruded, and pelletized to obtain modified recycled polyester. S6. Preparation of blended yarn: Modified regenerated polyester yarn is obtained by extrusion spinning, mixed evenly with wool yarn, and processed into blended yarn through combing and ring spinning steps; S7. Fabric Preparation: The blended yarn is woven into grey fabric using a special weave on a loom. The fabric is then boiled, mercerized, dyed, shaped, pre-shrinked, singed, and etched to produce the recycled polyester and wool blended constant-temperature fabric.

3. The preparation method according to claim 2, characterized in that The composite silane coupling agent in step S1 includes KH560 and a silane coupling agent with a double bond in a mass ratio of 5-7:2-3, the silane coupling agent with a double bond is selected from at least one of KH570, A171, and A151, the mass ratio of the halloysite nanotubes to the composite silane coupling agent is 10:2-3, the temperature of the heating and stirring reaction is 40-50°C, and the time is 1-3h.

4. The preparation method according to claim 2, characterized in that In step S2, the mass ratio of 2-aminobenzophenone, aminoindocyanine green and modified halloysite nanotubes is 2-3:1-3:10, and the heating and stirring reaction temperature is 75-85° C. and the time is 10-15 hours.

5. The preparation method according to claim 2, characterized in that In step S3, the mass ratio of the benzophenone / indocyanine green modified halloysite nanotubes, emulsifier, decanoic acid, methyl methacrylate, initiator and ethylene glycol dimethacrylate is 5-7:0.5-1:20-25:24-30:0.5-1:2-4, the initiator is selected from at least one of azobisisobutyronitrile, diethyl azodicarboxylate, sodium persulfate, potassium persulfate, and ammonium persulfate, the emulsifier is selected from at least one of sodium dodecyl sulfate, sodium dodecyl sulfonate, sodium dodecylbenzenesulfonate, sodium hexadecyl sulfate, sodium hexadecyl sulfonate, sodium hexadecylbenzenesulfonate, sodium octadecyl sulfate, sodium octadecyl sulfonate, and sodium octadecylbenzenesulfonate, the stirring reaction time is 3-5 hours, and the temperature is 80-90°C.

6. The preparation method according to claim 2, characterized in that In step S4, the mass ratio of UiO-66-NH2, cadmium salt and ammonium sulfide is 10:3-5:2-3, the cadmium salt is cadmium chloride or cadmium nitrate, the temperature of the heating and stirring reaction is 45-55°C, and the time is 2-4h.

7. The preparation method according to claim 2, characterized in that The heating and melting temperature in step S5 is 260-280° C., the mass ratio of the waste PET resin, the silane coupling agent, the CdS@UiO-66-NH2 composite material and the microcapsule is 100:3-5:3-5:6-8, and the silane coupling agent is at least one of KH550, KH602, and KH792.

8. The preparation method according to claim 2, characterized in that The mass ratio of the modified regenerated polyester yarn to the wool yarn in step S6 is 8-10:4-7.

9. The preparation method according to claim 2, characterized in that The loom in step S7 is a double-sided circular loom, and the special weaving structure is double-sided warp knitting structure.

10. A regenerated polyester and wool blended constant temperature fabric produced by the preparation method according to any one of claims 1 to 9.

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