Fluorocarbon chain-free hydrophobic fabric as well as preparation method and application thereof

A technology of fluorocarbon chains and fabrics, which is applied in plant fibers, textiles, papermaking, and liquid-repellent fibers, and can solve problems such as environmental pollution and low surface energy

Active Publication Date: 2022-05-03
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention adopts low surface energy fluorine-free long carbon chain monomer to carry out chemical grafting on the fiber surface of the fabric, which can effectively solve the problem of environmental pollution. The roughened surface morphology is generated in situ on the fiber surface, which can cooperate with the chemical protection effect of the low surface energy polymer on the fiber surface for liquid repellency

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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  • Fluorocarbon chain-free hydrophobic fabric as well as preparation method and application thereof
  • Fluorocarbon chain-free hydrophobic fabric as well as preparation method and application thereof
  • Fluorocarbon chain-free hydrophobic fabric as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example

[0025] The synthesis of 1,2-bis(p-toluenesulfonyl)hydrazine (TsNHNHTs) is shown in the following formula:

[0026]

[0027] Synthetic steps. Under nitrogen protection, 18.64 g (100.00 mmol) p-toluenesulfonyl hydrazide (p-Toluenesulfonyl hydrazide) and 28.60 g (150.00 mmol) p-toluenesulfonyl chloride (p-toluene sulfochloride) were added to a 1000 ml three-necked flask, and 120 mL Dichloromethane (except water) was used as a solvent, and 11.96 g (150.00 mmol) of pyridine was added dropwise in 10 minutes under nitrogen protection. After stirring at room temperature for 3 h, the solution became turbid after adding 300 mL of anhydrous diethyl ether. After cooling down to 0°C, 200 mL of deionized solution was added, and a light yellow floc was obtained by suction filtration, which was then continued to be filtered with 150 mL of anhydrous diethyl ether to obtain It is a white solid, which is dried in an oven at 30°C. Dissolve the dried white solid in 400 mL of methanol, heat to...

Embodiment 1

[0049] Add 100g sodium hydroxide and 500ml deionized water into a 1000ml beaker, stir until dissolved, soak the untreated raw cotton fabric in the solution for 1 hour, take it out and wash it with deionized water five times, then put the alkalized cotton fabric into the solution for 5 % glacial acetic acid for 30 min, and then washed five times with deionized water to obtain pretreated fabrics, which were dried at room temperature and then used.

[0050] The pretreated fabric (0.415 g) was soaked in anhydrous tetrahydrofuran, ultrasonically cleaned for 30 min, and dried at room temperature for later use. Put the pretreated fabric into an Erlenmeyer flask containing 100 mL of anhydrous tetrahydrofuran. After the fabric is completely soaked, add 0.83 g of sodium bicarbonate as an acid binding agent. After stabilization, dissolve 3.25 g of bromoacetyl bromide in 5 ml of dehydrated tetrahydrofuran, add it into the Erlenmeyer flask through a syringe to react for 1 h, raise the temp...

Embodiment 2

[0054] Take Example 1 diazotized cotton fabric 0.26 g (containing 2 mmol of hydroxyl) and put it into a 150 ml Erlenmeyer flask, add 40 mmol of hexyl diazoacetate monomer, and use 100 mL of anhydrous tetrahydrofuran as a solvent, monomer in the bottle and The molar ratio of hydroxyl groups on the surface of diazotized cotton fabric is 20:1, under nitrogen condition, add 9.15 mg (0.025 mmol) (π-allylPdCl) 2 , cooled to -10°C, added NaBPh 4 32.5 mg (0.09 mmol), heated to 0°C, 5°C and 15°C and reacted for 1 h successively after dissolving, and finally transferred the Erlenmeyer flask to a shaking water bath, raised the temperature to 30°C and reacted for 12 h, and the treated fabric was dissolved in tetrahydrofuran Ultrasonic cleaning in medium for 2 min, and drying in an oven at low temperature to obtain a hydrophobic fabric with a water contact angle of 110.4°.

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 discloses a fluorocarbon-chain-free hydrophobic fabric and a preparation method and application thereof.The preparation method comprises the steps that a fabric is sequentially soaked in alkali liquor and acid liquor, and a pretreated fabric is obtained; then reacting the pretreated fabric with bromoacetyl bromide to obtain a treated fabric; reacting the treated fabric with 1, 2-bis (p-toluenesulfonyl) hydrazine to obtain a diazotized fabric; reacting the diazotized fabric with a diazoacetate monomer to obtain a fluorine-free carbon chain hydrophobic fabric; the diazoacetate monomer is butyl diazoacetate, hexyl diazoacetate, octyl diazoacetate, dodecyl diazoacetate, tetradecyl diazoacetate or octadecyl diazoacetate. According to the invention, diazoacetate is taken as a monomer, different fiber grafting modification processes are adopted, and structures with different properties are formed on the fiber surface; the comprehensive properties such as thermal stability, air permeability and breaking strength of the finished fabric are tested, the heat resistance and breaking strength of the finished fabric are reduced, and the air permeability is good.

Description

technical field [0001] The invention belongs to the hydrophobic technology, in particular to a fluorine-free carbon chain hydrophobic fabric and its preparation method and application. Background technique [0002] In recent years, the construction of covalently bonded polymer structures through surface covalent polymerization (Covalent on-surface polymerization) has become one of the research hotspots in surface molecular science. Thanks to the rapid development of scanning probe microscopy, researchers have gradually begun to explore the process of surface covalent polymerization at the atomic level. The carbene polymerization of α-carbonyl diazo compounds is an efficient polymerization method, which has attracted great attention from scholars in recent years, but its reaction mechanism and the application of carbene polymerization still need researchers to continue to study and explore . The prior art discloses a waterproof fabric material and a preparation method there...

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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IPC IPC(8): D06M13/422D06M13/322D06M101/06
CPCD06M13/422D06M13/322D06M2101/06D06M2200/12
Inventor 李战雄康佳良陈明强
Owner SUZHOU UNIV
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