CN-122013500-A - Finishing method for hydrophobic and oleophobic properties of alumina fiber products

CN122013500ACN 122013500 ACN122013500 ACN 122013500ACN-122013500-A

Abstract

The application discloses a method for finishing hydrophobic and oleophobic properties of an alumina fiber product, which belongs to the technical field of chemical materials and comprises the steps of cleaning the surface of a fiber by using ethanol, removing impurities, activating functional groups of the alumina fiber product, preparing a nanoparticle modified alumina fiber product, carrying out nano material in-situ growth on the alumina fiber product, carrying out high-temperature curing and polymerization coating on the product by using self-healing alkane polymer, and curing the coating by using organic polymer to well protect the surface of the product and endow the fiber product with low surface energy.

Inventors

Meng Dongzi
Dang zhao
WANG HUI
LI XIAOHUA
JI WEN
CUI JIANLEI
Jing Liangxiao

Assignees

山东东珩国纤新材料有限公司

Dates

Publication Date: 20260512
Application Date: 20260325

Claims (8)

1. The method for finishing the hydrophobic and oleophobic properties of the alumina fiber product is characterized by comprising the following steps of: cleaning the surface of the fiber by using ethanol, removing impurities, and activating the functional group of the alumina fiber product; preparing a nanoparticle modified alumina fiber product, and carrying out nano material in-situ growth on the alumina fiber product; And (3) carrying out high-temperature curing and polymerization coating on the product by utilizing the self-healing alkane polymer.
2. A method of hydrophobic and oleophobic finishing of alumina fiber products according to claim 1, wherein said surface cleaning comprises: completely immersing the alumina fiber product in ethanol solution, carrying out ultrasonic auxiliary treatment at constant temperature of 40 ℃ plus or minus 5 ℃ for 20min plus or minus 5min, and setting the ultrasonic power to be 80-100W; After the treatment is finished, the fiber is washed by deionized water for 2 to 3 times, and is placed in a 60 ℃ plus or minus 5 ℃ vacuum drying oven for pre-drying for 15 minutes, so that impurities on the surface of the fiber are thoroughly removed, and meanwhile, hydroxyl functional groups on the surface of the fiber are directionally activated to form uniform anchoring sites.
3. The method for finishing the hydrophobic and oleophobic properties of the alumina fiber product according to claim 1, wherein the in-situ growth is to select TiO 2 -SiO 2 composite nano particles, ultrasonically disperse the composite nano particles, deposit the composite nano particles on the surface of the fiber, enable the composite nano particles to be solidified and react by using a preset temperature, and then wash and then dry the composite nano particles to obtain the nano particle modified alumina fiber product.
4. The method for finishing the hydrophobic and oleophobic properties of the alumina fiber product according to claim 3, wherein the average particle size of the composite nano particles is 20-50nm, and the dispersing solvent is a mixed solution of deionized water and absolute ethyl alcohol, and the volume ratio is 3:1.
5. The method for finishing hydrophobic and oleophobic properties of an alumina fiber product according to claim 4, wherein the generation of the nanoparticle modified alumina fiber product comprises: Placing the composite nanoparticle mixed solution into an ultrasonic dispersing instrument, and dispersing for 30min at 100W power to form uniform non-agglomeration nano dispersion liquid; Immersing the activated alumina fiber product into the dispersion liquid completely, keeping the constant temperature of 45 ℃ plus or minus 5 ℃ for adsorption for 25min plus or minus 5min, taking out, draining the redundant dispersion liquid, pre-curing for 15min at the low temperature of 65 ℃ plus or minus 5 ℃ and then heating to the high temperature of 90 ℃ plus or minus 5 ℃ for curing for 25min, so as to realize the in-situ growth and bonding of nano particles on the fiber surface; And after the solidification is finished, washing for 3 times by using deionized water, removing unbound free nano particles, and vacuum drying at 70 ℃ to constant weight to obtain the nano particle modified alumina fiber product.
6. A method of hydrophobic and oleophobic finishing of alumina fiber products according to claim 1, wherein said high temperature cured and polymerized coating comprises: uniformly spraying the compound polymer solution on the surface of the modified alumina fiber product by adopting a high-pressure airless spraying mode, wherein the spraying thickness is controlled to be 6-8 mu m, so that the full coverage of the coating is ensured, and the spraying is free; after the spraying is finished, preheating and crystallizing for 20min at 80+/-5 ℃ to preliminarily crosslink and shape the polymer, then heating to 120+/-10 ℃ to solidify for 45 min+/-5 min, and naturally cooling to room temperature after solidification to obtain the amphiphobic alumina fiber product.
7. The method for finishing the hydrophobic and oleophobic properties of the alumina fiber product according to claim 1, wherein the ethanol content of the fiber product is 2% -5%, the selected nano particles are one or more of TiO2, siO2 and ZIF-8, and the content of the nano particles is 2% -5%; The selected organic polymer is one or more of polymethylhydrosiloxane, polymethylsiloxane and pure acrylic emulsion; A small amount of silane coupling agent KH-550 is added, the addition amount is 1% of the total mass of the polymer, the binding force between the coating and the nano-layer is improved, and the solid content is controlled to be 10+/-1%.
8. The method for finishing the hydrophobicity and oleophobicity of the alumina fiber product according to claim 6, wherein the specific characterization steps of the lyophobic property of the amphiphobic alumina fiber product are as follows: cutting a regular fiber sample with the length of 10cm multiplied by 5cm, ensuring that the surface is free from wrinkles and damages, and placing the regular fiber sample in a constant temperature and humidity environment with the temperature of 25 ℃ plus or minus 1 ℃ and the humidity of 50% +/-5% for 24 hours before testing; a video optical contact angle measuring instrument is adopted to respectively test water drops and n-hexadecane oil drops, the volume of the liquid drops is controlled to be 5 mu L, 5 different test points are selected for each sample, and an average value is obtained; After finishing, the hydrophobic contact angle of the product is more than or equal to 152 degrees, the oleophobic contact angle is more than or equal to 135 degrees, the rolling angle of a water drop is less than or equal to 5 degrees, the rolling angle of an oil drop is less than or equal to 8 degrees, the contact angle attenuation rate is less than or equal to 5 percent after the product is baked at a high temperature of 150 ℃ for 24 hours, the friction resistance times is more than or equal to 100 times, and the amphiphobic performance is not obviously reduced.

Description

Finishing method for hydrophobic and oleophobic properties of alumina fiber products Technical Field The application belongs to the technical field of chemical materials, and particularly relates to a method for finishing hydrophobic and oleophobic properties of an alumina fiber product. Background Super-amphiphobicity refers to a solid surface with super-hydrophobicity and super-oleophobicity, which is widely studied as a special interface characteristic due to its magic liquid-repellent function and great application potential in daily life and industry, and in nature, there are many examples that can prove super-hydrophobicity and super-oleophobicity. The most well known example is the lotus effect, which remains clean despite its growth in mud. Researchers have first elucidated the "lotus effect" mechanism, attributed its water repellency to the combination of microscopic and nanolayered surface structures, and a layer of dense hydrophobic waxy substance attached to the surface, and other natural amphiphobic examples such as giant root leaves, rice leaves, rose petals, etc. have also been reported, and besides plants, some insects have also been found to have superhydrophobic surfaces such as the legs of water-strides, wings of butterflies and cicada, based on which various biomimetic materials are being continuously studied for application in various industries. The alumina fiber is a high-temperature resistant and high-strength breathable porous material, is outstanding in the field of military industry and civil materials, and the super-amphiphobic alumina fiber product is applied to different fields due to the unique properties of the super-amphiphobic alumina fiber product, such as self-cleaning, antifouling, anti-icing, liquid separation, corrosion resistance and the like, and the super-amphiphobic alumina fiber product can be applied to various severe environments, so that the damage degree of the environment to the environment is relieved, the underwater applicability is improved, the purpose of high-temperature flame retardance is achieved, and personnel and equipment are protected. The prior preparation of the super-amphiphobic surface mainly concentrates on the surface energy of a fluorine-containing finishing agent to reduce the material, has small atomic radius of fluorine and strong electronegativity, can form high-strength and high-polarization C-F bonds with carbon atoms, and has weaker intermolecular force of polymers containing the C-F bonds, which leads to very low surface energy of the fluorine-containing polymers, so that the surface energy of fibers can be reduced by using the fluorine-containing finishing agent, the hydrophobic effect of the fabric surface treated by the fluorine-containing finishing agent can be greatly improved, however, even though the fluorine-containing finishing agent cannot be used as a method for solving the unstable liquid repellent effect of the rough texture surface, besides the harm to human bodies and environment brought by the fluorine-containing finishing agent, the material treated by the fluorine-containing finishing agent cannot keep the liquid repellent stability under extreme environments, such as chemical damages of acid, alkali, salt, heavy oil and the like, and in addition, the fluorine-rich surface can be stripped off during mechanical abrasion and impact of the external environment, so that the durability of the texture surface is critical to the liquid repellent performance of the material. Disclosure of Invention In order to solve the problems and the technical defects, the application adopts the following technical scheme that the method for finishing the hydrophobic and oleophobic properties of the alumina fiber product comprises the following steps: cleaning the surface of the fiber by using ethanol, removing impurities, and activating the functional group of the alumina fiber product; preparing a nanoparticle modified alumina fiber product, and carrying out nano material in-situ growth on the alumina fiber product; And (3) carrying out high-temperature curing and polymerization coating on the product by utilizing the self-healing alkane polymer. Preferably, the surface cleaning comprises: completely immersing the alumina fiber product in ethanol solution, carrying out ultrasonic auxiliary treatment at constant temperature of 40 ℃ plus or minus 5 ℃ for 20min plus or minus 5min, and setting the ultrasonic power to be 80-100W; After the treatment is finished, the fiber is washed by deionized water for 2 to 3 times, and is placed in a 60 ℃ plus or minus 5 ℃ vacuum drying oven for pre-drying for 15 minutes, so that impurities on the surface of the fiber are thoroughly removed, and meanwhile, hydroxyl functional groups on the surface of the fiber are directionally activated to form uniform anchoring sites. Preferably, the in-situ growth is to select TiO 2-SiO2 composite nano particles, ultrasonically disperse the composite nano particles,