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A kind of modification method of polyester nonwoven fabric

A non-woven fabric and polyester technology, which is applied in the field of modification of polyester non-woven fabrics, can solve the problems of reducing the capacity of adsorbing heavy metal ions, the ability to remove heavy metals is not very high, and the adsorption of heavy metal ions has a great influence, and the modification method is simple Ease of handling, good mechanical and chemical stability, and low cost

Active Publication Date: 2020-06-19
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage is that chitosan is relatively soft and has poor mechanical strength. Compared with other hard raw materials, it is easy to volatilize, the gel property is unstable, and the number of amino groups will decrease after cross-linking modification, which reduces the absorption of heavy metals by chitosan gel. ion capacity
Studies have shown that cross-linking agents have a great influence on the adsorption of heavy metal ions by chitosan hydrogel. In the past, people used citric acid to cross-link chitosan grafted modified polyester fabrics to prepare functional materials for adsorption of heavy metal ions, but the adsorption Slow, the ability to remove heavy metals is not very high, and the function is relatively single
At present, there is no report on the modification method of polyester nonwovens with photocatalytic activity and heavy metal adsorption capacity.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • A kind of modification method of polyester nonwoven fabric
  • A kind of modification method of polyester nonwoven fabric
  • A kind of modification method of polyester nonwoven fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Weigh the polyester nonwoven fabric according to the ratio of the fabric mass to the solution mass (1:30), soak it in a sodium hydroxide solution with a mass percentage concentration of 25g / L, treat it at 80°C for 50min, and then wash it repeatedly with deionized water Until the pH value of the lotion is 7.0, finally dry it at 40°C. According to the ratio of chitosan mass to solution mass 1:50, chitosan with a deacetylation degree of 85% was added to an aqueous solution of acetic acid with a concentration of 5% by mass, stirred magnetically for 2 hours at 20°C to fully degrade it, and then sequentially added Citric acid with a mass percent concentration of 1%, sodium hypophosphite 1%, 0.1% glutaraldehyde, and polyethylene glycol with a mass percent concentration of 0.5% were magnetically stirred at 20°C for 5 minutes, and sealed and refrigerated for later use. According to the ratio of fabric quality to chitosan citric acid gel finishing solution 1:30, soak the washed p...

Embodiment 2

[0058] Weigh the polyester nonwoven fabric according to the ratio of fabric mass to solution mass 1:10, soak it in a sodium hydroxide solution with a mass percentage concentration of 45g / L, treat it at 100°C for 70min, and then wash it repeatedly with deionized water Until the pH value of the lotion is 7.0, dry at 60°C. According to the ratio of chitosan mass to solution mass 1:30, chitosan with a deacetylation degree of 95% was added to an aqueous solution of acetic acid with a concentration of 10% by mass, stirred magnetically for 4 hours at 40°C to fully degrade it, and then sequentially added Citric acid with a mass percentage concentration of 3%, sodium hypophosphite 3%, 0.3% glutaraldehyde, and polyethylene glycol with a mass percentage concentration of 1.5%, were magnetically stirred at 40°C for 10 minutes, and sealed and refrigerated for later use. According to the ratio of fabric quality to chitosan citric acid gel finishing solution 1:10, soak the washed polyester no...

Embodiment 3

[0061] Weigh the polyester nonwoven fabric according to the ratio of fabric mass to solution mass 1:20, soak it in a sodium hydroxide solution with a mass percentage concentration of 35g / L, treat it at 90°C for 60min, and then wash it repeatedly with deionized water Until the pH value of the lotion is 7.0, dry at 50°C. According to the ratio of chitosan mass to solution mass 1:40, chitosan with a deacetylation degree of 90% was added to an aqueous solution of acetic acid with a concentration of 8% by mass, stirred magnetically for 3 hours at 30°C to fully degrade it, and then sequentially added Citric acid with a mass percentage concentration of 2%, sodium hypophosphite 2%, glutaraldehyde 0.2%, and polyethylene glycol with a mass percentage of 1.0% were magnetically stirred at 30°C for 8 minutes, and sealed and refrigerated for later use. According to the ratio of fabric quality to chitosan citric acid gel finishing solution 1:20, soak the washed polyester non-woven fabric in ...

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Abstract

The invention discloses a method for modifying polyester nonwoven fabrics, which specifically includes: first pre-treating the polyester nonwoven fabric to remove impurities adhering to the surface of the polyester nonwoven fabric; and then filling the polyester nonwoven fabric with chitosan citric acid. Gel finishing solution: Finally, nano-titanium dioxide is loaded on the surface of the filled and finished polyester non-woven fabric to obtain a fabric with photocatalytic activity and the ability to absorb heavy metal ions. The present invention uses a chemical grafting method to fill and organize chitosan citric acid gel into the interior of polyester nonwovens, and at the same time loads a thin film of titanium dioxide particles on the surface of the fabric. This invention has developed a method that can not only photocatalytically degrade organic pollutants, but also adsorb Materials containing heavy metal ions. The prepared polyester nonwoven has good mechanical and chemical stability, strong photocatalytic activity, selective adsorption, and is environmentally friendly. And heavy metal ions can be removed through elution and adsorption, which will not affect photocatalytic degradation and can be reused many times, saving costs.

Description

technical field [0001] The invention belongs to the technical field of textile engineering and relates to a method for modifying polyester nonwoven fabrics. Background technique [0002] Density greater than 4.5g cm -3 Metals such as copper, manganese, lead, gold and silver are generally called heavy metals. When the content of heavy metal ions in the water body is too high, it will cause water pollution. The heavy metal ion pollution lasts for a long time, it is difficult to degrade by itself, and it will amplify its toxicity through food chain enrichment, endangering the health of aquatic animals, plants and human beings. people's attention. At present, the treatment methods of heavy metal ions in water mainly include chemical precipitation method, ion exchange method, membrane method, electrochemical method and adsorption method, among which the adsorption method has the advantages of high efficiency, low cost, easy operation and safety. [0003] Textile printing and d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/38D06M11/46D06M13/207D06M15/03B01J20/26B01J20/32B01J31/38C02F1/28C02F1/32C02F101/20C02F101/30D06M101/32
CPCB01J20/06B01J20/24D06M11/38D06M11/46D06M13/207D06M15/03C02F1/288C02F1/32B01J20/265B01J20/3208B01J31/38B01J37/0203B01J37/0225D06M2101/32C02F2101/20C02F2101/308C02F2305/10B01J35/39
Inventor 张辉薛海军韩白冰徐军孙润军
Owner XI'AN POLYTECHNIC UNIVERSITY
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