Methods and systems for vapor-based decolorization of polyester textiles

Abstract

A method and a system for vapor-based decolorization of a polyester textile are provided. The method includes: obtaining a textile to be decolorized by adding a phase change material to the polyester textile for mixing, and performing the vapor-based decolorization on the textile to be decolorized. An amount of the phase change material corresponds to a weight of polyester in the polyester textile, and a phase change temperature of the phase change material is not greater than a vapor temperature of a decolorizing agent used in the vapor-based decolorization.

What is claimed is: 
     
         1 . A method for vapor-based decolorization of a polyester textile, comprising:
 obtaining a textile to be decolorized by adding a phase change material to the polyester textile for mixing; and   performing the vapor-based decolorization on the textile to be decolorized, wherein
 an amount of the phase change material corresponds to a weight of polyester in the polyester textile, and 
 a phase change temperature of the phase change material is not greater than a vapor temperature of a decolorizing agent used in the vapor-based decolorization. 
   
     
     
         2 . The method of  claim 1 , wherein the obtaining a textile to be decolorized by adding a phase change material to the polyester textile for mixing includes:
 preprocessing the phase change material before adding the phase change material to the polyester textile, wherein the preprocessing includes:
 determining a preprocessing manner based on a textile feature of the polyester textile; 
 determining a preprocessing parameter based on the textile feature and the preprocessing manner; and 
 preprocessing the phase change material based on the preprocessing manner and the preprocessing parameter. 
   
     
     
         3 . The method of  claim 1 , wherein the phase change material is a powdered solid. 
     
     
         4 . The method of  claim 1 , wherein the phase change material is one or more of paraffin and polyethylene glycol. 
     
     
         5 . The method of  claim 1 , wherein the phase change material is a polyethylene glycol-based composite phase change material, and a raw material of the polyethylene glycol-based composite phase change material includes polyethylene glycol. 
     
     
         6 . The method of  claim 5 , wherein the polyethylene glycol-based composite phase change material is a polyethylene glycol-silicon oxide composite material. 
     
     
         7 . The method of  claim 1 , wherein the decolorizing agent used in the vapor-based decolorization is a mixture of a first decolorizing agent and a second decolorizing agent at a preset mass ratio, wherein
 the first decolorizing agent includes at least one of N,N-dimethylformamide, ethylene glycol, acetic acid, aniline, dimethyl sulfoxide, or N,N-dimethylacetamide; and   the second decolorizing agent includes at least one of xylene, naphthalene, or benzophenone.   
     
     
         8 . The method of  claim 1 , wherein the decolorizing agent used in the vapor-based decolorization includes at least one of N,N-dimethylformamide, dimethyl sulfoxide, or ethylene glycol. 
     
     
         9 . The method of  claim 8 , wherein a contact time between vapor of the decolorizing agent and the textile to be decolorized in the vapor-based decolorization is not less than a preset time threshold. 
     
     
         10 . The method of  claim 9 , wherein a process of the vapor-based decolorization includes:
 obtaining a temperature distribution of the textile to be decolorized through a monitoring device;   determining a decolorization state distribution based on the temperature distribution, a textile feature of the textile to be decolorized, and a decolorizing agent feature; and   determining a decolorization regulation parameter based on the decolorization state distribution.   
     
     
         11 . The method of  claim 10 , wherein the determining a decolorization regulation parameter based on the decolorization state distribution includes:
 determining one or more candidate regulation parameters based on the decolorization state distribution;   determining, through a damage prediction model, a fabric damage level corresponding to each of the one or more candidate regulation parameters based on the one or more candidate regulation parameters and the decolorization state distribution, the damage prediction model being a machine learning model; and   determining the decolorization regulation parameter based on the fabric damage level corresponding to each of the one or more candidate regulation parameters.   
     
     
         12 . The method of  claim 1 , wherein the polyester textile is a polyester-containing textile in which a mass percentage of polyester is within a preset percentage range, and the polyester-containing textile includes at least one of a pure polyester textile, a polyester-cotton textile, a polyester-nylon textile, a polyester-spandex textile, or a polyester blended textile. 
     
     
         13 . A system for vapor-based decolorization of a polyester textile, comprising a mixing device, a vapor-based decolorization device, and a processor, wherein the processor is configured to:
 obtain a textile to be decolorized by adding a phase change material to the polyester textile for mixing; and   perform the vapor-based decolorization on the textile to be decolorized through the vapor-based decolorization device, wherein:
 an amount of the phase change material corresponds to a weight of polyester in the polyester textile, and 
 a phase change temperature of the phase change material is not greater than a vapor temperature of a decolorizing agent used in the vapor-based decolorization. 
   
     
     
         14 . The system of  claim 13 , wherein the processor is further configured to:
 preprocess the phase change material before adding the phase change material to the polyester textile, wherein to perform the preprocessing, the processor is further configured to:
 determine a preprocessing manner based on a textile feature of the polyester textile; 
 determine a preprocessing parameter based on the textile feature and the preprocessing manner; and 
 preprocessing the phase change material based on the preprocessing manner and the preprocessing parameter. 
   
     
     
         15 . The system of  claim 13 , wherein the phase change material is one or more of paraffin and polyethylene glycol. 
     
     
         16 . The system of  claim 13 , wherein the decolorizing agent used in the vapor-based decolorization is at least one of N,N-dimethylformamide, dimethyl sulfoxide, or ethylene glycol. 
     
     
         17 . The system of  claim 16 , wherein a contact time between vapor of the decolorizing agent and the textile to be decolorized in the vapor-based decolorization is not less than a preset time threshold. 
     
     
         18 . The system of  claim 17 , wherein the processor is further configured to:
 obtain a temperature distribution of the textile to be decolorized through a monitoring device;   determine a decolorization state distribution based on the temperature distribution, a textile feature of the textile to be decolorized, and a decolorizing agent feature; and   determine a decolorization regulation parameter based on the decolorization state distribution.   
     
     
         19 . The system of  claim 18 , wherein the processor is further configured to:
 determine one or more candidate regulation parameters based on the decolorization state distribution;   determine, through a damage prediction model, a fabric damage level corresponding to each of the one or more candidate regulation parameters based on the one or more candidate regulation parameters and the decolorization state distribution, the damage prediction model being a machine learning model; and   determine the decolorization regulation parameter based on the fabric damage level corresponding to each of the one or more candidate regulation parameters.   
     
     
         20 . A non-transitory computer-readable storage medium storing computer instructions, wherein when reading the computer instructions in the storage medium, a computer implements a method for vapor-based decolorization of a polyester textile, the method comprising:
 obtaining a textile to be decolorized by adding a phase change material to the polyester textile for mixing; and   performing the vapor-based decolorization on the textile to be decolorized, wherein
 an amount of the phase change material corresponds to a weight of polyester in the polyester textile, and 
   a phase change temperature of the phase change material is not greater than a vapor temperature of a decolorizing agent used in the vapor-based decolorization.