CN-122013352-A - Sun-proof polylactic acid fabric containing microcapsules and preparation method thereof

Abstract

The invention relates to a microcapsule-containing sun-proof polylactic acid fabric and a preparation method thereof. The sun-proof polylactic acid fabric is prepared by the following steps of firstly preparing microcapsules containing rutin, secondly mixing the microcapsules containing rutin into polylactic acid particles to prepare microcapsule/polylactic acid composite particles containing rutin, secondly spinning by a melt spinning process to prepare microcapsule/polylactic acid composite fibers containing rutin, and finally spinning the microcapsule/polylactic acid composite fibers containing rutin into yarns, and weaving the yarns into the fabric, wherein the fabric is the sun-proof polylactic acid fabric containing the microcapsules. The ultraviolet transmittance T (UVA)% of the sun-proof polylactic acid fabric prepared by the method is lower than 5%, meets the national standard, and the sun-proof function of the sun-proof polylactic acid fabric is stable and is not obviously weakened after 10 times of water washing.

Inventors

• WANG WEIMING
• YANG JIAXIN
• MEI XINYI
• HUANG LEYI
• WANG LIN
• AI TIANQI

Assignees

• 武汉纺织大学

Dates

Publication Date

20260512

Application Date

20260325

Claims (5)

1. 1. The preparation method of the microcapsule-containing sun-proof polylactic acid fabric is characterized by comprising the following steps of: (1) Dissolving acacia and beta-cyclodextrin in deionized water, stirring in a water bath at 80-85 ℃ for 20-40 min, cooling to room temperature, adding rutin, homogenizing and emulsifying for 3-5 min at a stirring speed of 7000-9000 r/min to obtain an emulsion; (2) Mixing the microcapsule containing rutin into polylactic acid particles, and granulating by a granulator to obtain microcapsule/polylactic acid composite particles containing rutin; (3) Spinning the microcapsule/polylactic acid composite particles containing rutin prepared in the step (2) by adopting a melt spinning process to prepare microcapsule/polylactic acid composite fibers containing rutin; (4) Spinning the rutin-containing microcapsule/polylactic acid composite fiber prepared in the step (3) into yarn, and weaving the yarn into fabric, wherein the fabric is a sun-proof polylactic acid fabric containing microcapsules.
2. 2. The preparation method of the microcapsule-containing sun-proof polylactic acid fabric is characterized in that the dosage ratio of the acacia, the beta-cyclodextrin, the rutin and the deionized water in the step (1) is 1g to (1-3) g to (5-7) g to (60-80) mL.
3. 3. The preparation method of the microcapsule-containing sun-proof polylactic acid fabric is characterized in that the dosage ratio of the rutin-containing microcapsules to the polylactic acid in the step (2) is 1g to (100-120 g), and the granulating temperature is 280-290 ℃.
4. 4. The preparation method of the microcapsule-containing sun-proof polylactic acid fabric is characterized in that in the step (3), a spinning temperature interval of a melt spinning process is 260-280 ℃, a spinning speed is 2600-2800 m/min, a spinneret plate with 24 holes in specification and 0.25 x 0.75 aperture is selected, a circular blowing cooling mode is adopted, and a pump supply amount during spinning is controlled to be 22-24 g/min through a metering pump.
5. 5. A microcapsule-containing sun-proof polylactic acid fabric, which is characterized by being prepared by the method of any one of claims 1-4.

Description

Sun-proof polylactic acid fabric containing microcapsules and preparation method thereof Technical Field The invention belongs to the technical field of fabric preparation, and particularly relates to a microcapsule-containing sun-proof polylactic acid fabric and a preparation method thereof. Background In recent years, people have comprehensively realized that sun is beneficial to health due to the fact that sun is sunless, and people now recognize that the sun is harmful to health due to the fact that the sun is radiated by ultraviolet rays too much. Therefore, the ultraviolet rays and the serious influence of the ultraviolet rays on human beings are necessary to be known, and measures are taken to treat the textiles in an ultraviolet-proof way, so that the aim of preventing the human body from being damaged by the ultraviolet rays is fulfilled. According to the results of world health organization publication, if the human body is exposed to excessive ultraviolet rays, it not only causes skin black spots, but also suppresses skin immune response, causes abnormality of deoxyribonucleic acid (DNA), causes canceration, and may cause cataract and partial blindness. The current common ultraviolet-proof finishing methods are padding and coating methods, and the ultraviolet-proof agent is an ultraviolet reflecting agent and an absorbing agent. The ultraviolet absorbent padding method is adopted for finishing, because the ultraviolet absorbent can convert light energy, namely high-energy ultraviolet light into low-energy heat energy or electromagnetic waves with shorter wavelength or harmless to human bodies, and the ultraviolet absorbent can not reflect the ultraviolet light to the exposed face and eyes of the human bodies like an ultraviolet reflector, so that the danger of human body illness is increased. Currently, improving the sun protection efficacy of fabrics is a hotspot of research, but its key technology is difficult to overcome or there are imperfect sites. Rutin has the function of absorbing solar ultraviolet, but has weak binding force with polylactic acid fibers, is difficult to apply to the polylactic acid fibers and is easy to fall off, and the rutin is freshly reported to be used for sun-screening and finishing the polylactic acid fibers. Disclosure of Invention Aiming at the defects of the prior art, the first aim of the invention is to provide a microcapsule-containing sun-proof polylactic acid fabric which has good sun-proof effect. The sun-proof polylactic acid fabric is prepared by the following steps of firstly preparing microcapsules containing rutin by taking Arabic gum, beta-cyclodextrin and rutin as raw materials, secondly mixing the microcapsules containing rutin into polylactic acid particles to prepare microcapsule/polylactic acid composite particles containing rutin, thirdly spinning the microcapsule/polylactic acid composite particles containing rutin by adopting a melt spinning process to prepare microcapsule/polylactic acid composite fibers containing rutin, and finally spinning the microcapsule/polylactic acid composite fibers containing rutin into yarns, and weaving the yarns into the fabric which is sun-proof polylactic acid fabric containing microcapsules. The second aim of the invention is to provide a preparation method of a sun-proof polylactic acid fabric containing microcapsules, which comprises the following steps: (1) Dissolving acacia and beta-cyclodextrin in deionized water, stirring in a water bath at 80-85 ℃ for 20-40 min, cooling to room temperature, adding rutin, homogenizing and emulsifying for 3-5 min at a stirring speed of 7000-9000 r/min to obtain an emulsion, and spray-drying the emulsion to obtain the rutin-containing microcapsule. Preferably, the dosage ratio of the Arabic gum, the beta-cyclodextrin, the rutin and the deionized water is 1g to (1-3) g to (5-7) g to (60-80) mL. (2) And (3) mixing the rutin-containing microcapsules into polylactic acid particles, and granulating by adopting a granulator to obtain the rutin-containing microcapsule/polylactic acid composite particles. Preferably, the dosage ratio of the rutin-containing microcapsule to the polylactic acid is 1g to (100-120 g), and the granulating temperature is 280-290 ℃. (3) And (3) spinning the microcapsule/polylactic acid composite particles containing rutin prepared in the step (2) by adopting a melt spinning process to prepare microcapsule/polylactic acid composite fibers containing rutin. Preferably, the melt spinning process has a spinning temperature range of 260-280 ℃, a spinning speed of 2600-2800 m/min, a spinneret plate with 24 holes and a pore diameter of 0.25-0.75, and adopts a circular blowing cooling mode, and the pump supply is controlled to be 22-24 g/min during spinning through a metering pump. (4) Spinning the rutin-containing microcapsule/polylactic acid composite fiber prepared in the step (3) into yarn, and weaving the yarn into fabric, wherein the fabric is a sun-proof