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Method for preparing porous microspheres from waste nylon 6 fabric

A technology of waste nylon and porous microspheres, which is applied in the preparation of microspheres, textile/flexible product manufacturing, microcapsule preparation, etc., can solve the problems of small particle size of nylon microspheres, cannot be uniformly distributed, and cannot be formed, and achieves gentle processing. conditions, beneficial to environmental protection and resource utilization, and the effect of high use value

Pending Publication Date: 2022-06-07
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method of Document 2 can only prepare nylon microspheres from a dilute polymer solution, resulting in a smaller particle size and a lower yield. Document 3 cannot prepare nylon microspheres from a concentrated polymer solution because when the polymer When the solution concentration is high, the polymer solution will be entangled with each other and cannot be evenly distributed, and cannot form monodisperse particles in the literature.

Method used

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  • Method for preparing porous microspheres from waste nylon 6 fabric
  • Method for preparing porous microspheres from waste nylon 6 fabric
  • Method for preparing porous microspheres from waste nylon 6 fabric

Examples

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Embodiment 1

[0056] A method for preparing porous microspheres from waste nylon 6 fabrics, the specific steps are as follows:

[0057] (1) At 25°C, waste nylon 6 fabric (colorless waste nylon 6 fabric fragments, Wujiang Fuhua Weaving Co., Ltd., Suzhou City, Jiangsu Province, weight 100g / cm) 2 ) was immersed in a soaping solution with a concentration of 2g / L, washed for 1 hour, and then dried at 25°C for 24 hours; the bath ratio of waste nylon 6 fabric and soaping solution was 1:50;

[0058] (2) adding the waste nylon 6 fabric after drying in step (1) into anhydrous formic acid, heating and stirring for 2 hours at a temperature of 70 ° C, and filtering to obtain a transparent and uniform nylon 6 solution with a concentration of 5wt%; The pore used in the head is 450nm;

[0059] (3) adding deionized water dropwise to the nylon 6 solution obtained in step (2), the nylon 6 in the nylon 6 solution is separated out; the amount of deionized water added is 80% of the quality of the nylon 6 soluti...

Embodiment 2

[0064] A method for preparing porous microspheres from waste nylon 6 fabrics, the specific steps are as follows:

[0065] (1) At 26 ° C, waste nylon 6 fabric (colorless waste nylon 6 fabric fragments, Wujiang Fuhua Weaving Co., Ltd., Suzhou City, Jiangsu Province, gram weight 100g / cm 2 ) was immersed in soaping solution with a concentration of 2g / L, washed for 1 hour, and then dried at 26°C for 24 hours; the bath ratio of waste nylon 6 fabric and soaping solution was 1:50;

[0066] (2) adding the waste nylon 6 fabric after drying in step (1) into anhydrous formic acid, heating and stirring for 1.8 h at a temperature of 80° C., and filtering to obtain a transparent and uniform nylon 6 solution with a concentration of 5wt%; wherein, filtering The pore used in the filter head is 450nm;

[0067] (3) adding deionized water dropwise to the nylon 6 solution obtained in step (2), the nylon 6 in the nylon 6 solution is separated out; the amount of deionized water added is 80% of the q...

Embodiment 3

[0072] A method for preparing porous microspheres from waste nylon 6 fabrics, the specific steps are as follows:

[0073] (1) At 27 °C, waste nylon 6 fabric (colorless waste nylon 6 fabric fragments, Wujiang Fuhua Weaving Co., Ltd., Suzhou City, Jiangsu Province, gram weight 100g / m2) 2 ) was immersed in soaping solution with a concentration of 2g / L, washed for 1 hour, and then dried at 27°C for 24 hours; the bath ratio of waste nylon 6 fabric and soaping solution was 1:50;

[0074] (2) adding the waste nylon 6 fabric after drying in step (1) into anhydrous formic acid, heating and stirring for 2 hours at a temperature of 80° C., and filtering to obtain a transparent and uniform nylon 6 solution with a concentration of 5wt%; The pore used in the head is 450nm;

[0075] (3) adding deionized water dropwise to the nylon 6 solution obtained in step (2), the nylon 6 in the nylon 6 solution is separated out; the amount of deionized water added is 80% of the quality of the nylon 6 so...

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Abstract

The invention relates to a method for preparing porous microspheres from waste nylon 6 fabrics, which adopts a thermally induced phase separation method of sequentially adding binary solvents, and comprises the operation of dropwise adding deionized water into a nylon 6 solution, the nylon 6 solution is a solution formed after the waste nylon 6 fabrics are dissolved in anhydrous formic acid, and the concentration of the nylon 6 solution is 5-7wt%; the dropwise adding amount of the deionized water is 80-85% of the mass of the nylon 6 solution; the yield of the prepared porous microspheres is 70%-80%; the average diameter of the porous microspheres is 15-50 [mu] m, the average pore size is 1-28 nm, and the porosity is 40%-48%. The preparation method disclosed by the invention is simple, and the prepared porous microspheres are relatively high in yield and relatively large in particle size, contain certain pores and are of an aspheric crystal structure.

Description

technical field [0001] The invention relates to the technical field of waste textile recycling, and relates to a method for preparing porous microspheres from waste nylon 6 fabrics. Background technique [0002] As the consumption of textiles increases, so does the amount of waste textiles generated each year, which includes post-industrial textile waste and post-consumer textile waste, with synthetic fibers being more consumed than natural fibers. Nylon is one of the most used synthetic fibers, of which nylon 6 (PA-6) and nylon 66 (PA-66) represent the majority of commercial nylon production and applications, of which nylon 6 is due to its high heat resistance. It is one of the nylon fibers widely used in textiles because of its high resistance to abrasion and abrasion, good mechanical properties and processability, so it has a considerable amount of waste every year. Therefore, waste textiles need to be recycled and reused to become a new resource. [0003] Post-industri...

Claims

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Application Information

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IPC IPC(8): C08J9/28C08L77/02B01J13/12
CPCC08J9/28B01J13/125C08J2377/02C08J2201/0502C08J2201/0504Y02W30/62
Inventor 关晋平董爽程献伟陈国强
Owner SUZHOU UNIV
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