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Method for preparing high phase transition enthalpy phase transition temperature-adjusting fiber from hydrolysis products of waste acrylic yarn

A technology of hydrolyzate and acrylic fiber waste, which is applied in the direction of fiber chemical characteristics, chemical instruments and methods, heat exchange materials, etc., can solve the problems of complicated microcapsule preparation process, limited fiber addition, and low heat storage capacity, and achieve Realize the effect of resource reuse, low price and low production cost

Inactive Publication Date: 2013-04-17
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still deficiencies in the phase-change temperature-regulating fibers currently prepared, mainly in the following aspects: (1) The microcapsule preparation process is complicated, the encapsulation rate is low, and the cost is high; (2) Due to the limitation of the size of the microcapsules, the addition amount of the microcapsules is limited. , low heat storage capacity (the phase change latent heat of Outlast fiber is 7.8J / g); (3) The microcapsule wall and the phase change material are combined by physical action, and it is easy to leak when pressed or damaged, which will affect the service life

Method used

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  • Method for preparing high phase transition enthalpy phase transition temperature-adjusting fiber from hydrolysis products of waste acrylic yarn
  • Method for preparing high phase transition enthalpy phase transition temperature-adjusting fiber from hydrolysis products of waste acrylic yarn

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The hydrolyzed product of acrylic waste silk, that is, hydrolyzed polyacrylonitrile, was placed in DMF to prepare a 10wt.% solution A, which was swollen at 95°C for 180 minutes;

[0023] Dissolve polyethylene glycol (number-average molecular weight 2000, twice the mass of hydrolyzed polyacrylonitrile) in DMF to prepare 20wt.% solution B, dissolve at 70°C for 60min, add butyl titanate and February Dibutyltin silicate, the addition of both is 0.1% of polyethylene glycol quality;

[0024] Mix solution A and solution B evenly, let stand for reaction for 15 minutes, filter under reduced pressure, extract with acetone, and dry in vacuum to obtain graft copolymer polyethylene glycol grafted hydrolyzed polyacrylonitrile (H-PAN-g-PEG) ;

[0025] Dissolve 15 grams of H-PAN-g-PEG in 83 grams of water, add 2 grams of boric acid after all the dissolution, continue to stir to dissolve it completely, and obtain the spinning stock solution after standing for defoaming; the spinning st...

Embodiment 2

[0027] The hydrolyzed product of acrylic fiber waste, that is, hydrolyzed polyacrylonitrile, was placed in DMF to prepare a 15wt.% solution A, which was swollen at 80°C for 180 minutes;

[0028] Dissolve polyethylene glycol (number average molecular weight 2000, twice the mass of hydrolyzed polyacrylonitrile) in DMF to prepare 25wt.% solution B, dissolve at 90°C for 60min, add butyl titanate and February Dibutyltin silicate, the addition of both is 0.1% of polyethylene glycol quality;

[0029] Mix solution A and solution B evenly, let stand for reaction for 10 minutes, filter under reduced pressure, extract with acetone, and dry in vacuum to obtain graft copolymer polyethylene glycol grafted hydrolyzed polyacrylonitrile (H-PAN-g-PEG) ;

[0030] Dissolve 15 grams of H-PAN-g-PEG in 81 grams of water, add 4 grams of boric acid after all the dissolution, continue to stir until it is completely dissolved, and obtain the spinning stock solution after standing for defoaming; pass th...

Embodiment 3

[0032] The hydrolyzed product of acrylic fiber waste, that is, hydrolyzed polyacrylonitrile, was placed in DMF to prepare a 13wt.% solution A, which was swollen at 90°C for 180 minutes;

[0033] Dissolve polyethylene glycol (number-average molecular weight 4000, twice the mass of hydrolyzed polyacrylonitrile) in DMF to prepare 23wt.% solution B, dissolve at 80°C for 60 minutes, add butyl titanate and February Dibutyltin silicate, the addition of both is 0.1% of polyethylene glycol quality;

[0034] Mix solution A and solution B evenly, leave to react for 20 minutes, filter under reduced pressure, extract with acetone, and dry in vacuum to obtain graft copolymer polyethylene glycol grafted hydrolyzed polyacrylonitrile (H-PAN-g-PEG) ;

[0035] Dissolve 20 grams of H-PAN-g-PEG in 78 grams of water, add 2 grams of boric acid after fully dissolved, continue to stir until it is completely dissolved, and obtain the spinning stock solution after standing for defoaming; pass the spinn...

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Abstract

The invention relates to a method for preparing high phase transition enthalpy phase transition temperature-adjusting fiber from hydrolysis products of waste acrylic yarn, comprising the following steps of: reacting the hydrolysis products of the waste acrylic yarn, such as hydrolysis polyacrylonitrile and polyethylene glycol, according to proportion to prepare graft copolymer polyethylene glycolgrafted hydrolysis polyacrylonitrile; completely dissolving the polyethylene glycol grafted hydrolysis polyacrylonitrile in water, adding boric acid, stirring and completely dissolving, standing and defoaming to obtain a spinning stock solution; and preparing the spinning stock solution into high phase transition enthalpy phase transition temperature-adjusting fiber through wet spinning. Comparedwith the existing phase transition temperature-adjusting fiber, the phase transition temperature-adjusting fiber prepared by the method has the advantages of high phase transition enthalpy, stable phase transition and excellent durability and the like, and can be widely applied to the fields of textile and apparel, energy-saving building materials and certain special fields such as military industry, aerospace, etc.

Description

technical field [0001] The invention relates to the technical field of functional fibers, in particular to a method for preparing high-phase-change enthalpy phase-change temperature-regulating fibers by using acrylic waste silk hydrolyzed graft products. Background technique [0002] Phase-change temperature-regulating fiber is a kind of heat-storing and temperature-regulating functional fiber developed by utilizing the characteristics of releasing or absorbing latent heat and maintaining temperature during the phase change of substances. With the rapid development of society, the increasing demand for energy, and the gradual depletion of non-renewable resources, the research and utilization of phase-change temperature-regulating fibers is attracting and receiving more and more attention from the research community. Foreign countries began research work in the 1980s. The United States has successfully applied microcapsules with phase change function to the solution spinning...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/96C08G81/02C09K5/14
Inventor 郭静徐磊刘欣
Owner DALIAN POLYTECHNIC UNIVERSITY
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