CN-121992553-A - Preparation method of functional fabric and knapsack assembled by same

Abstract

The invention discloses a preparation method of functional fabric and an assembled knapsack thereof, belonging to the technical field of fabric preparation, wherein the flexible continuous interface is constructed by PA latex, so that Cu 2 O antibacterial particles form a semi-embedded fixed structure, and composite optical microspheres can be stably attached and orderly assembled, and the attachment fastness of a functional layer and the surface function activity are considered; the DA 3261-dopamine conjugate is compounded with TPU and subjected to ultraviolet polymerization to form a temperature sensitive layer, so that the outer surface of the backpack has visual thermal response capability, wen Minceng starts to generate obvious color change at 35 ℃, blue-purple is changed into purple at 40 ℃, the comprehensive color difference delta E reaches more than 28.7,45 ℃, and delta E exceeds 30, and the backpack has obvious temperature early warning capability.

Inventors

• CAI AIGUO
• CAI JUNFENG

Assignees

• 力星(福建)工贸有限公司

Dates

Publication Date

20260508

Application Date

20260410

Claims (4)

1. 1. A method for preparing a functional fabric, comprising the steps of: S1, preparing double-layer jacquard base cloth, namely selecting full-dull polyester filaments as surface warp yarns, black polyester yarns as interlayer weft yarns, silver-plated polyester yarns as local reflection yarns, weaving the base cloth by adopting double-layer jacquard weave, wherein the surface layer is a 5/1 right twill and local satin composite jacquard weave, the inner layer adopts a high-weave-density weave, and the double layers are connected through a binding weave; S2, constructing a shading heat-insulating layer, namely introducing the shading heat-insulating layer into the middle layer, the back layer or the interface between the layers of the double-layer jacquard base fabric, wherein the shading heat-insulating layer comprises a black light absorption component, a metallized reflection component and a full-extinction special-shaped section fiber component, the black light absorption component is 150D black low-elasticity heavy net yarn, the metallized reflection component is silver-plated polyester fiber, the full-extinction special-shaped section fiber component is W-shaped section full-extinction polyester filament, the 150D black low-elasticity heavy net yarn is used as main shading weft yarn and is arranged in a shading area in the middle of the fabric, the silver-plated polyester fiber is arranged in a reflection enhancement area close to a light receiving side, and the W-shaped section full-extinction polyester filament is arranged on the surface layer of the fabric so as to form the composite shading jacquard fabric; S3, preparing PA latex, namely taking 1L deionized water as a solvent, introducing nitrogen and discharging oxygen, adding 50g of methyl methacrylate, 50g of butyl acrylate and 5g of sodium dodecyl benzene sulfonate SDBS, uniformly mixing by magnetic stirring, heating to 80 ℃, dissolving 3g of potassium sulfate in 100ml of deionized water, adding, stirring and reacting for 5 hours under the nitrogen atmosphere, and obtaining PA latex; S4, preparing Cu 2 O antibacterial particles, weighing 15g of polyvinylpyrrolidone PVP, 5.5g of sodium citrate dihydrate and 5.2g of copper acetate monohydrate, sequentially adding 300mL of ethylene glycol and 1L of deionized water, magnetically stirring for 20min and performing ultrasonic treatment for 20min, adding 200mL of 0.4mol/L NaOH solution, adding 150mL of 0.2mol/L ascorbic acid solution in two steps, stirring for 60min, centrifuging for 10min, washing and freeze-drying for 5h, and dispersing 0.5g of freeze-dried powder in 100mL of absolute ethyl alcohol to obtain Cu 2 O antibacterial particle dispersion; S5, constructing an antibacterial layer, namely immersing the composite shading jacquard fabric into 50% ethanol solution with the volume fraction for ultrasonic washing for 3 hours, spraying PA latex emulsion on the inner side of the fabric after drying the cut pieces, drying, spraying 50-300 mu l of Cu 2 O-containing antibacterial particle dispersion liquid, drying at 60 ℃ for 15min, and embedding Cu 2 O antibacterial particles into the PA layer formed by the PA latex; S6, preparing composite optical microspheres, namely 5g of ammonium bicarbonate and 1L of deionized water, introducing nitrogen for 10min, adding 190g of styrene, 10g of methyl methacrylate and 10g of acrylic acid, adding 70-150 mg of sodium dodecyl benzene sulfonate SDBS, pre-emulsifying for 1.5h under the stirring of 75 ℃ and 350rpm, adding 200mL of aqueous solution containing 3.6g of ammonium persulfate, initiating reaction for 4h, and curing for 2h at 80 ℃ to obtain monodisperse composite optical microsphere dispersion; S7, constructing a color development layer, pre-coating PA latex emulsion on the outer surface of the fabric, then scraping and coating the monodisperse composite optical microsphere dispersion liquid on the same surface at the speed of 1 cm/S by adopting a scraping and coating machine, and drying to obtain the fabric with the color development layer; s8, carrying out composite shaping, and carrying out hot pressing and compositing on the fabric and the 210D nylon lining cloth to obtain the functional fabric.
2. 2. The method for preparing the functional fabric according to claim 1, wherein the functional fabric further comprises a temperature-sensitive early warning functional layer, and the preparation method comprises the following steps: 1, synthesizing a DA 3261-dopamine conjugate, dissolving 10g of 10, 12-twenty-five-carbon-diacetylenic acid DA3261 in 200ml of dichloromethane, filtering to remove polymerized impurities, steaming to obtain pure DA3261, dissolving 1.8g of DA3261 and 0.138g of 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide EDC in 200ml of dichloromethane, adding 0.82g of N-hydroxysuccinimide NHS, reacting for 4 hours at 25 ℃ to obtain DA3261-NHS, dissolving 1.5g of DA3261-NHS and 0.72g of dopamine in 200ml of N, N-dimethylformamide DMF, adding 0.38g of triethylamine, and stirring and reacting for 12 hours at 25 ℃ to obtain DA 3261-dopamine conjugate powder; K2, preparing a temperature-sensitive layer, adding 10g of TPU into 190gDMF, stirring at 45 ℃ until the TPU is completely dissolved to obtain a TPU solution with the mass fraction of 5%, adding 50mgDA 3261-dopamine conjugate powder into 30mLTPU solution, ultrasonically dissolving, pouring into a mould or partially coating the solution on a preset area of a fabric, drying at 80 ℃ to remove N, N-dimethylformamide DMF, and carrying out illumination polymerization by using 254nm ultraviolet light to form the DA 3261-dopamine conjugate/TPU temperature-sensitive layer.
3. 3. An assembled backpack comprises front pieces, rear pieces, side pieces, bottom pieces, turnover covers, shoulder strap connecting parts and inner bin interlayer, and is characterized in that part of the backpack is assembled by adopting the functional fabric prepared by the preparation method according to any one of claims 1-2, wherein a color developing layer and a temperature sensitive layer of the functional fabric face to the outer side of the backpack, and an antibacterial layer of the functional fabric faces to the inner side of the backpack.
4. 4. An assembled backpack according to claim 3, wherein the front panel and the flip cover are provided with a color-developing layer and a temperature-sensitive layer, the peripheral area of the inner compartment interlayer is provided with a light-shielding heat-insulating reinforcing area, and the inner compartment interlayer is arranged in such a way that the antibacterial layer faces into the compartment.

Description

Preparation method of functional fabric and knapsack assembled by same Technical Field The invention discloses a fabric preparation technology, in particular to a preparation method of a functional fabric and a knapsack assembled by the same. Background The existing knapsack shell fabric is mostly made of common polyester, nylon, canvas or coating composite materials thereof, and generally only has wear resistance, water splashing resistance or certain strength retention capacity, and is difficult to simultaneously achieve the functions of attractive decoration, heat insulation protection, sanitation protection and environmental response. Especially in the high added value content storage scenes of computers, medicines, foods, photographic equipment and the like, the traditional knapsack fabric has the following problems: firstly, the fabric has single function and lacks composite protection capability on strong light, high temperature and bacterial pollution; Secondly, the appearance effect mainly depends on dyeing and finishing coloring, the color level is limited, and the color is easy to fade; Thirdly, the ability of inhibiting temperature rise is insufficient in a long-term sun-drying environment; Fourth, the multifunctional coating often adopts a simple blending or single-sided superposition mode, so that mutual interference of functional layers, unstable adhesion, particle falling and performance attenuation are easy to occur; fifthly, most of the existing backpack fabrics cannot perform visual feedback on temperature abnormality, and users cannot easily sense the heat accumulation state of the surface of the backpack in time. Disclosure of Invention The invention aims to solve the problems and provide a preparation method of a functional fabric and a knapsack assembled by the same. In order to achieve the aim, the invention provides the following technical scheme that the preparation method of the functional fabric comprises the following steps: S1, preparing double-layer jacquard base cloth, namely selecting full-dull polyester filaments as surface warp yarns, black polyester yarns as interlayer weft yarns, silver-plated polyester yarns as local reflection yarns, weaving the base cloth by adopting double-layer jacquard weave, wherein the surface layer is a 5/1 right twill and local satin composite jacquard weave, the inner layer adopts a high-weave-density weave, and the double layers are connected through a binding weave; S2, constructing a shading heat-insulating layer, namely introducing the shading heat-insulating layer into the middle layer, the back layer or the interface between the layers of the double-layer jacquard base fabric, wherein the shading heat-insulating layer comprises a black light absorption component, a metallized reflection component and a full-extinction special-shaped section fiber component, the black light absorption component is 150D black low-elasticity heavy net yarn, the metallized reflection component is silver-plated polyester fiber, the full-extinction special-shaped section fiber component is W-shaped section full-extinction polyester filament, the 150D black low-elasticity heavy net yarn is used as main shading weft yarn and is arranged in a shading area in the middle of the fabric, the silver-plated polyester fiber is arranged in a reflection enhancement area close to a light receiving side, and the W-shaped section full-extinction polyester filament is arranged on the surface layer of the fabric so as to form the composite shading jacquard fabric; S3, preparing PA latex, namely taking 1L deionized water as a solvent, introducing nitrogen and discharging oxygen, adding 50g of methyl methacrylate, 50g of butyl acrylate and 5g of sodium dodecyl benzene sulfonate SDBS, uniformly mixing by magnetic stirring, heating to 80 ℃, dissolving 3g of potassium sulfate in 100ml of deionized water, adding, stirring and reacting for 5 hours under the nitrogen atmosphere, and obtaining PA latex; S4, preparing Cu 2 O antibacterial particles, weighing 15g of polyvinylpyrrolidone PVP, 5.5g of sodium citrate dihydrate and 5.2g of copper acetate monohydrate, sequentially adding 300mL of ethylene glycol and 1L of deionized water, magnetically stirring for 20min and performing ultrasonic treatment for 20min, adding 200mL of 0.4mol/L NaOH solution, adding 150mL of 0.2mol/L ascorbic acid solution in two steps, stirring for 60min, centrifuging for 10min, washing and freeze-drying for 5h, and dispersing 0.5g of freeze-dried powder in 100mL of absolute ethyl alcohol to obtain Cu 2 O antibacterial particle dispersion; S5, constructing an antibacterial layer, namely immersing the composite shading jacquard fabric into 50% ethanol solution with the volume fraction for ultrasonic washing for 3 hours, spraying PA latex emulsion on the inner side of the fabric after drying the cut pieces, drying, spraying 50-300 mu l of Cu 2 O-containing antibacterial particle dispersion liquid, drying at 60 ℃ f