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Macroporous spherical polyacrylonitrile bead body prepared from waste acrylic fibers and preparation process thereof

A polyacrylonitrile bead, polyacrylonitrile technology, applied in recycling technology, other chemical processes, alkali metal oxides/hydroxides, etc., to achieve the effect of broadening development paths, realizing efficient recycling and reducing production costs

Active Publication Date: 2013-03-20
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the annual production of acrylic fiber waste in our country is quite large. Although some waste silk can be reused after drawing, there are still quite a large part of it that needs to find another way out.

Method used

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  • Macroporous spherical polyacrylonitrile bead body prepared from waste acrylic fibers and preparation process thereof
  • Macroporous spherical polyacrylonitrile bead body prepared from waste acrylic fibers and preparation process thereof
  • Macroporous spherical polyacrylonitrile bead body prepared from waste acrylic fibers and preparation process thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Embodiment 1: the process steps and order of the present embodiment are as figure 1 shown. Specific steps are as follows:

[0043] (1) dissolve

[0044] Raw materials and formula (unit-kilogram) of the present embodiment:

[0045]Acrylic waste silk (provided by Desheng Textile Trading Co., Ltd., Shishi City, Fujian Province): 14 kg

[0046] DMF: 70kg

[0047] Stabilizer (mixture of oxalic acid and isoascorbic acid, mass ratio 4:1): 0.5 kg

[0048] Porogen (mixture of activated carbon and calcium carbonate, mass ratio 1:9): 15.5 kg

[0049] Dissolving process steps and process parameters: Put the above-mentioned amount of waste acrylic fibers into the reactor filled with the above-mentioned amount of DMF, control the reaction temperature at 95°C, and dissolve for 40 minutes to form polyacrylonitrile with a mass fraction of 16.7%— After the DMF solution, add 0.5 kg of a stabilizer of a mixture of oxalic acid and erythorbic acid and 15.5 kg of a porogen of a mixture...

Embodiment 2

[0058] Embodiment 2: the process steps and order of the present embodiment are as figure 1 shown. Specific steps are as follows:

[0059] (1) dissolve

[0060] Raw materials and formula (unit-kilogram) of the present embodiment:

[0061] Acrylic waste silk (provided by Qingyuan Printing and Dyeing Development Co., Ltd., Shishi City, Fujian Province): 12 kg

[0062] DMF: 72 kg

[0063] Stabilizer (mixture of oxalic acid and diethylamide, mass ratio 2:3): 1.0 kg

[0064] Porogen (mixture of activated carbon and calcium carbonate, mass ratio 2:8): 15 kg

[0065] Dissolution process steps and process parameters: Put the above-mentioned amount of waste acrylic fibers into the reactor filled with the above-mentioned amount of DMF, control the reaction temperature at 85°C, dissolve and react for 40 minutes, and form polyacrylonitrile with a mass fraction of 14.3%— After the DMF solution, 1.0 kg of a stabilizer of a mixture of oxalic acid and diethylamide and 15 kg of a porogen...

Embodiment 3

[0074] Embodiment 3: the process steps and order of the present embodiment are as figure 1 shown. Specific steps are as follows:

[0075] (1) dissolve

[0076] Raw materials and formula (unit-kilogram) of the present embodiment:

[0077] Acrylic waste silk (Jiahe Knitting Co., Ltd., Changle City, Fujian Province): 10 kg

[0078] DMF: 70kg

[0079] Stabilizer (potassium oxalate): 0.5 kg

[0080] Porogen (mixture of activated carbon and calcium carbonate, mass ratio 1:12): 19.5 kg

[0081] Dissolution process steps and process parameters: put 10.0 kg of acrylic waste silk into a reactor filled with 70 kg of N,N-dimethylformamide (DMF for short), control the reaction temperature at 75°C, and dissolve for 30 minutes. After forming a polyacrylonitrile-DMF solution with a mass fraction of 12.5%, 0.5 kg of a stabilizer of potassium oxalate and 19.5 kg of a porogen of a mixture of activated carbon and calcium carbonate were added. This process step is carried out under normal...

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Abstract

The invention provides a macroporous spherical polyacrylonitrile bead body and a preparation method thereof. The preparation method comprises the following steps: by adopting a solvent dissolution method, dissolving waste acrylic fibers at appropriate temperature, and adding a stabilizer and a pore-forming agent; and directly spraying the waste acrylic fibers to a coagulating bath formed from a surfactant, an activator and the like by using an adjustable spray gun, solidifying into balls while mixing, carrying out ethanol washing and water washing, and drying to obtain the macroporous spherical polyacrylonitrile bead bodies of different grain sizes, wherein the specific surface area is 100-900m<2> / g, the moisture content is 30-50%, the skeletal density is 0.58-1.34g / ml, the apparent density is 0.18-0.49g / ml, the pore volume is 0.31-4.82ml / g, and the porosity is 80-95%. The preparation process is simple, and the product has good acid-base resistance, anti-oxidation and anti-biodegradation capabilities.

Description

technical field [0001] The invention belongs to the field of functional polymer materials, and in particular relates to the preparation of macroporous spherical polyacrylonitrile beads by using waste acrylic fibers as raw materials, its preparation process and the recycling and recovery of solvents. Background technique [0002] In order to effectively cope with the crisis caused by the decline of non-renewable resource reserves such as coal, oil, and natural gas, resource renewable utilization technologies are facing major opportunities and challenges. With the rapid development of social economy, the acrylic fiber industry in the synthetic fiber industry is constantly growing and becoming mature. However, while the output of acrylic fiber is increasing day by day, the generation of acrylic fiber waste is also increasing thereupon. According to relevant research data, the total amount of acrylic fiber waste that will be produced in the acrylic fiber production process is a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/20C08J11/08C08J9/00C08J3/24C08J3/14B01J20/26B01J20/28B01J20/30
CPCY02W30/62
Inventor 刘明华林兆慧陈羡玲
Owner FUZHOU UNIV
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