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A kind of mercapto-functionalized fiber and its preparation method and application

A chemical fiber and functionalization technology, applied in chemical instruments and methods, fiber processing, radiation wave/microwave fiber processing, etc., can solve the problems of fiber limitation, cumbersome process, low adsorption capacity of functional fibers, etc., and achieve high functionalization efficiency. , the effect of efficient selective removal

Active Publication Date: 2021-12-24
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] (1) Most of the traditional preparation methods adopt chemical reaction grafting at room temperature, the preparation time is long, the grafting efficiency is low, the adsorption capacity of functional fibers is not high, and the removal efficiency of heavy metals is not good;
[0008] (2) The selection of functional reagents used in traditional fibers is usually irregular, resulting in poor selective adsorption performance for heavy metal ions
However, the effect of dithiourea functionalized fiber prepared by this method is not ideal, and it needs to show a certain adsorption effect under the condition of pH 5-7, but the water body seriously polluted by heavy metals often does not have this pH condition, so this Fibers are extremely limited in practical applications
[0010] Chinese patent application (CN109289811A) provides a cellulose nanocrystal adsorbent containing mercapto and amino groups and its preparation method, mainly based on cellulose nanocrystals, and grafting compounds containing mercapto and amino groups on cellulose nanocrystals The adsorbent is obtained on the crystal, but the preparation method takes a long time and the process is cumbersome, which is not conducive to the large-scale application of actual production

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 mercapto-functionalized fiber and its preparation method and application
  • A kind of mercapto-functionalized fiber and its preparation method and application
  • A kind of mercapto-functionalized fiber and its preparation method and application

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preparation example Construction

[0031] The preparation method of the mercapto-functionalized fiber of the present invention comprises the following steps:

[0032] Step 1, weigh the matrix fibers, add amino functional reagents and react in a microwave reactor, wherein the microwave power is 250-350W, the reaction temperature is 150-200°C, and the reaction time is 1.5-3h; after the reaction, wash, Dry to obtain amino-functionalized fibers;

[0033] Step 2, weigh the amino-functionalized fiber obtained in step 1, and add an acid chloride functional reagent to react in a microwave reactor, wherein the microwave power is 250-350W, the reaction temperature is 80-150°C, and the reaction time is 0.5-1.5 h; after the reaction is finished, washing and drying to obtain acid chloride functionalized fibers;

[0034] Step 3: Weigh the acid chloride functionalized fibers obtained in step 2, and add a sulfhydryl functional reagent to react in a microwave reactor, wherein the microwave power is 150-250W, the reaction tempe...

Embodiment 1

[0063] Step 1, weigh 1.0g of matrix fiber, add it to 40mL water, react at 70°C for 30min, add 0.25gEDC, 0.5gNHS and 20mL of 10% HPEI ethylene glycol solution, transfer to 100mL microwave hydrothermal reaction kettle for reaction, wherein , The microwave hydrothermal reaction conditions are 300W, 180℃, 2.0h. Cool to room temperature after the reaction is over, wash the fiber with deionized water to neutrality after suction filtration, then dry the obtained fiber material in a vacuum oven overnight to obtain amino functionalized polyacrylonitrile fiber (PAN MW -HPEI);

[0064] Step 2, weigh the amino functionalized polyacrylonitrile fiber PAN obtained in step 1 MW -HPEI 1.00g, add 17mL of chloroacetyl chloride, 30mL of dimethylformamide, transfer to a 100mL microwave hydrothermal reaction kettle for reaction, wherein the microwave hydrothermal reaction conditions are 300W, 100°C, 1.0h. Cool to room temperature after the reaction is over, wash the fiber with deionized water and...

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Abstract

A mercapto-functionalized fiber is obtained by the following method: step 1, weighing matrix fiber, adding amino functional reagents to react in a microwave reactor, after the reaction, washing and drying to obtain amino-functionalized fibers; step 2, weighing Take the amino functionalized fiber obtained in step 1, and add an acid chloride functional reagent to react in a microwave reactor, after the reaction, wash and dry to obtain the acid chloride functionalized fiber; step 3, weigh the acid chloride functionalized fiber obtained in step 2 , and adding a thiol functional reagent to react in a microwave reactor, after the reaction, washing and drying to obtain a mercapto functionalized fiber. The invention also discloses a method for preparing the above-mentioned mercapto-functionalized fiber. The present invention solves the current problems of low functionalization efficiency and poor adsorption selectivity of functional fibers. The mercapto-functionalized fibers of the present invention not only have high functionalization efficiency, but also can realize high-efficiency and selective removal of various heavy metal ions.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a mercapto-functionalized fiber. [0002] The present invention also relates to a preparation method of the above-mentioned mercapto-functionalized fiber. [0003] The present invention also relates to the application of the above-mentioned mercapto-functionalized fiber. Background technique [0004] Heavy metal pollution is one of the most important pollutants in industrial wastewater, which has become a serious global problem that needs to be solved urgently. The sources of heavy metals are mainly anthropogenic activities, including machinery manufacturing, fossil fuel combustion, oil refining, rubber and electronics production, and discharge of electroplating wastewater. Heavy metal ions are highly toxic, and many heavy metal ions are highly toxic even at extremely low concentrations, enough to destroy the normal physiological activities of the human body and cau...

Claims

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M10/08B01J20/24B01J20/30C02F1/28C02F101/20
CPCD06M10/08D06M10/003B01J20/24C02F1/286C02F2101/20
Inventor 邓圣杨昱姜永海夏甫韩旭徐祥健席北斗
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI