阅读说明：本技术 利用常压低温等离子体制备的疏水染色织物及其制备方法 (Hydrophobic dyed fabric prepared by utilizing normal-pressure low-temperature plasma and preparation method thereof ) 是由 张春明 郭方舒 王宇 徐艺 赵亚如 吴昭莉 于 2019-12-04 设计创作，主要内容包括：本发明公开了一种利用常压低温等离子体制备的疏水染色织物及其制备方法,属于高分子材料技术领域。其技术方案为：包括以下步骤：(1)用等离子体对织物进行表面处理；(2)用墨水对表面处理后的织物进行染色(3)将染色后的织物浸入乳液中进行自由基聚合反应,然后干燥后再经焙烘即得疏水染色织物。本发明制备得到的疏水染色织物表面包裹着一层膜结构,从而提高了织物的疏水性能且经过处理后的织物的透气率高。(The invention discloses a hydrophobic dyed fabric prepared by utilizing normal-pressure low-temperature plasma and a preparation method thereof, belonging to the technical field of high polymer materials. The technical scheme is as follows: the method comprises the following steps: (1) carrying out surface treatment on the fabric by using plasma; (2) dyeing the fabric after surface treatment by using ink (3) immersing the dyed fabric into emulsion for free radical polymerization reaction, drying and baking to obtain the hydrophobic dyed fabric. The surface of the hydrophobic dyed fabric prepared by the method is wrapped with a layer of film structure, so that the hydrophobic property of the fabric is improved, and the treated fabric has high air permeability.)

1. The preparation method for preparing the hydrophobic dyed fabric by utilizing the normal-pressure low-temperature plasma is characterized by comprising the following steps of:

(1) carrying out surface treatment on the fabric by using plasma;

(2) dyeing the fabric with the surface treated by ink;

(3) and soaking the dyed fabric into the emulsion for free radical polymerization reaction, drying and baking to obtain the hydrophobic dyed fabric.

2. The method for preparing a hydrophobically dyed fabric using atmospheric pressure low temperature plasma as claimed in claim 1, wherein in the step (1), the plasma is air plasma.

3. The method as claimed in claim 1, wherein in the step (1), the voltage is 330V, the duty ratio is 40-60%, the sweeping speed is 2-5m/min, and the gas flow is 500L/h.

4. The method for preparing a hydrophobically dyed fabric using atmospheric pressure low temperature plasma as claimed in claim 1, wherein in the step (3), the emulsion is a fluorine-free water repellent in an amount of 80g/L to 160 g/L.

5. The method for preparing a hydrophobically dyed fabric by using normal-pressure low-temperature plasma as claimed in claim 1, wherein in the step (3), the dyed fabric is subjected to two-dipping and two-rolling in the emulsion, and the soaking time is 15min each time.

6. The method for preparing a hydrophobic dyed fabric using atmospheric low temperature plasma as claimed in claim 1, wherein in the step (3), the drying temperature is 50-90 ℃ for 3-5min, the baking temperature is 140-200 ℃ for 2-4 min.

7. The method for preparing a hydrophobically dyed fabric using atmospheric pressure low temperature plasma as claimed in claim 1, wherein the fabric is a cotton fabric, a polyester fabric or a silk fabric.

8. A hydrophobically dyed fabric obtainable by a process for preparing a hydrophobically dyed fabric by atmospheric low temperature plasma as claimed in any of claims 1 to 7.

Technical Field

The invention relates to the technical field of high polymer materials, in particular to a hydrophobic dyed fabric prepared by utilizing normal-pressure low-temperature plasma and a preparation method thereof.

Background

At present, in order to overcome the defects of poor hydrophobic property, easy pollution, poor self-cleaning property, poor water washing resistance and the like of cotton fabrics, organic fluorine water repellent finishing, fat water repellent finishing, acrylic acid finishing water repellent finishing and other treatment methods are mainly adopted. However, the fluorine-containing water repellent finishing has great influence on the environment, is expensive, has potential carcinogenic substances, and is limited by the environmental protection bureau, so that people hope to stop the process. Water repellent finishing of fats was the first means used to treat fabrics, but the hydrophobic effect decreases after finishing. Although the acrylic acid water repellent finishing has good film forming property, the acrylic acid water repellent finishing is easy to melt at high temperature.

The preparation method of the prior hydrophobic fabric mainly comprises the following steps: sol-gel method, hydrothermal method, chemical vapor deposition method, self-assembly method, polymer modification technology, electrospinning technology and the like. The sol-gel method has the following disadvantages: 1. the used raw materials are expensive, and some raw materials are organic matters and are harmful to health; 2. the overall sol-gel process usually takes a long time, often several days or weeks; 3. the gel has a large number of micropores, and a lot of gas and organic matters can be escaped in the drying process and shrink. The chemical vapor deposition method is a conventional technique for preparing a thin film, and the principle thereof is to decompose some components in a gaseous precursor by utilizing gaseous precursor reactants through chemical reactions between atoms and molecules, so as to form the thin film on a substrate. Chemical vapor deposition includes atmospheric pressure chemical vapor deposition, plasma-assisted chemical deposition, laser-assisted chemical deposition, deposition of metal organic compounds, etc., but the solid products produced by this method can only be in the form of powders.

Therefore, a new method for preparing a hydrophobic fabric is needed.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the prepared hydrophobic dyed fabric is coated with a film structure on the surface, so that the hydrophobic performance of the fabric is improved, and the treated fabric has high air permeability.

The technical scheme of the invention is as follows:

the invention provides a method for preparing a hydrophobic fabric by using a plasma technology, which comprises the following steps:

(1) carrying out surface treatment on the fabric by using plasma;

(2) dyeing the fabric with the surface treated by ink;

(3) and soaking the dyed fabric into the emulsion for free radical polymerization reaction, drying and baking to obtain the hydrophobic dyed fabric.

Preferably, in step (1), the plasma is air plasma, and the air plasma is used for saving energy and reducing cost compared with other gases.

Preferably, in the step (1), the voltage is 300-.

Preferably, in the step (3), the emulsion is 80g/L-160g/L of fluorine-free waterproof agent.

Preferably, in the step (3), the dyed fabric is soaked and rolled twice in the emulsion, and the soaking time is 15min each time.

Preferably, in the step (3), the drying temperature is 50-90 ℃ and the time is 3-5min, the baking temperature is 140-.

Preferably, the fabric is a cotton fabric, a polyester fabric or a silk fabric and other natural fibers and chemical fiber fabrics.

The invention also provides a hydrophobic dyed fabric prepared by the method.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention utilizes the principle of plasma equipment cold plasma primary atmospheric pressure glow laser discharge and the advantages of low pollution, low energy consumption, low water consumption, easy control and simple operation of the plasma, and sprays air on the surface of the cotton fabric by using the plasma equipment to rearrange and combine the free radicals on the surface of the cotton fabric. The plasma technology can enable oxygen-containing free radicals in plasma to be well blended into the surface of the fabric to improve the surface performance of the fabric, then the fabric is dyed by ink, the dyed fabric is immersed into emulsion for two-time immersion and two-time rolling, and finally the hydrophobic fabric can be prepared by drying and baking. The film structure that the surface of the cotton fabric polymerized by the plasma and the emulsion is wrapped by a layer can be observed through an electron microscope, so that the hydrophobic property of the fabric is improved, and the air permeability of the treated fabric is high.

2. The invention combines the plasma technology with the fluoride-free waterproofing agent, saves emulsion, water and time, reduces cost and can realize continuous mechanical production.

3. The method can enable the fabric to reach a hydrophobic state under a lower concentration of the fluorine-free waterproof agent, reduces the use of emulsion, saves the cost of experiments, utilizes the plasma technology to clean and have no pollution, does not need to expose the cotton fabric in the air for a period of time, can directly dry and bake the cotton fabric, has simple and convenient operation process and has sustainable development value. The hydrophobic dyed fabric prepared by the method has small fastness fluctuation of washing resistance after test, good air permeability, hydrophobic contact angle measurement and good effect.

Drawings

FIG. 1 is a scanning electron micrograph of a cotton fabric without treatment.

FIG. 2 is a scanning electron microscope image of a hydrophobically dyed fabric obtained from the cotton fabric of FIG. 1 after treatment by the method of the present invention.

Detailed Description