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A method for superhydrophobic modification of waste cotton fabrics with dopamine

A cotton fabric, dopamine technology, applied in the direction of repelling fibers to liquid, decomposition and recovery of textiles, plant fibers, etc., can solve the problems of less than 10% recycling rate and complex mechanism, and achieve excellent adhesion, source Broad, readily degradable effect

Active Publication Date: 2022-08-09
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a big textile country in my country, data shows that in 2011, the total output of waste textiles in my country exceeded 26 million tons, but only 2.3 million tons were recycled, and the recycling rate was less than 10%. Therefore, how to effectively recycle waste textiles , is an urgent problem to be solved in our country and even in the world
Dopamine can be oxidatively polymerized into polydopamine, but the mechanism is very complicated, and there is no conclusion so far. Based on the current known research, the polymerization mechanism is roughly that the catechol structure is easy to oxidize and polymerize to form an o-quinone structure, and then form a ring self-polymerization with its primary amino group. The key cyclization product of dopamine, 5,6-dihydroxyindole (DHI), finally forms a supramolecular aggregate of monomers through charge transfer, π stacking and hydrogen bond interactions—polydopamine

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 method for superhydrophobic modification of waste cotton fabrics with dopamine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) In-situ coordination of iron ions: Clean the discarded white cotton fabric to remove soluble impurities. The washed cotton fabric was immersed in 2.4mM FeCl at a liquor ratio of 1:40. 3 The solution was shaken in a 50°C water bath for 10 minutes and taken out.

[0038] (2) In-situ complexing of dopamine: prepare a 10.5 mM dopamine solution, add iron ion complexed cotton fabric to it at a liquor ratio of 1:30, and shake in a 50°C water bath for 10 minutes.

[0039] (3) In-situ oxidative polymerization of dopamine: Sodium perborate was added to the in-situ complexed and reacted solution of dopamine to make the concentration of sodium perborate 15 mM, and the solution was shaken in a 50° C. water bath for 60 minutes.

[0040] (4) Washing and drying: The in-situ oxidatively polymerized cotton fabric was washed three times with deionization, taken out and dried in an oven at 60°C.

[0041] (5) Repeated finishing: the dried and finished cotton fabric is processed once a...

Embodiment 2

[0044] (1) In-situ coordination of iron ions: Clean the discarded white cotton fabric to remove soluble impurities. The washed cotton fabric was immersed in 4mM FeCl at a liquor ratio of 1:30. 3 The solution was shaken in a 40°C water bath for 20 minutes and taken out.

[0045] (2) In situ complexing of dopamine: prepare a 20 mM dopamine solution, add iron ion complexed cotton fabric to it at a liquor ratio of 1:30, and shake in a 40° C. water bath for 30 minutes.

[0046] (3) In-situ oxidative polymerization of dopamine: hydrogen peroxide was added to the in-situ complexed and reacted solution of dopamine to make the concentration of hydrogen peroxide 20 mM, and the solution was shaken in a water bath at 40° C. for 70 minutes.

[0047] (4) Washing and drying: The in-situ oxidatively polymerized cotton fabric was washed three times with deionization, taken out and dried in an oven at 60°C.

[0048] (5) Repeated finishing: the dried and finished cotton fabric is processed onc...

Embodiment 3

[0051] (1) In-situ coordination of iron ions: Clean the discarded white cotton fabric to remove soluble impurities. The washed cotton fabric was immersed in 2mM Fe at a liquor ratio of 1:50. 2 (SO 4 ) 3 The solution was shaken in a 60°C water bath for 5 minutes and taken out.

[0052] (2) In situ complexing of dopamine: prepare a 10 mM dopamine solution, add iron ion complexed cotton fabric to it at a liquor ratio of 1:20, and shake in a 60° C. water bath for 10 minutes.

[0053] (3) In-situ oxidative polymerization of dopamine: hydrogen peroxide was added to the dopamine in-situ complexed and reacted solution to make the concentration of hydrogen peroxide 15 mM, and the solution was shaken in a 60° C. water bath for 30 minutes.

[0054] (4) Washing and drying: The in-situ oxidatively polymerized cotton fabric was washed three times with deionization, taken out and dried in an oven at 60°C.

[0055] (5) Repeated finishing: the dried and finished cotton fabric is processed ...

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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Abstract

The invention relates to a method for superhydrophobic modification of waste cotton fabric by dopamine. The invention selects waste cotton fabric as a base material, and reuses it while reducing environmental pressure. Dopamine and long-chain alkylamine are used to treat waste cotton fabric. After treatment, modification and modification can be carried out directly without treatment such as decolorization. The surface roughness is improved by constructing micro-nano structures on the surface of waste cotton fabrics with dopamine, and then long-chain alkylamines are used to reduce the surface energy of the waste cotton fabrics, thereby finally obtaining superhydrophobic waste cotton fabrics. The process of the invention is simple, the reaction period is short, the material is environmentally friendly, and the finished super-hydrophobic waste cotton fabric has good durability, etc., and has wide application value such as oil-water separation.

Description

technical field [0001] The invention relates to a modification technology of waste cotton fabrics, in particular to a method for superhydrophobic modification of waste cotton fabrics by dopamine. Background technique [0002] Cotton fabric is a common natural fiber fabric, which is widely loved by people due to its natural origin and comfortable wearing properties. With the ever-changing demand for clothing, the demand for textiles is increasing, which has also caused many environmental problems, such as the shortage of raw materials and the accumulation of waste textiles. my country, as a major textile country, data shows that in 2011, the total output of waste textiles in my country exceeded 26 million tons, but only 2.3 million tons were recycled, and the recycling rate was less than 10%. Therefore, how to effectively recycle waste textiles , is an urgent problem to be solved in our country and even the whole world. [0003] Superhydrophobic materials (contact angles ove...

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): D06M13/328D06M15/37D06M11/00D06M101/06
CPCD06M13/328D06M15/37D06M11/00D06M2200/12D06M2101/06Y02W30/66
Inventor 邢铁玲颜小洁谢爱玲陈国强
Owner SUZHOU UNIV