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Preparation method of super-hydrophobic cellulose material with micro-nano structure

A micro-nano-structured, super-hydrophobic technology, used in fiber processing, plant fibers, textiles, and papermaking, etc., can solve the problems of cumbersome fluorosilane modification process and complex process conditions, and achieve excellent durability, simplified experimental steps, and low price. Effect

Active Publication Date: 2014-07-23
山东天洋新材料有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent 200910152782.x proposes a method for preparing superhydrophobic nano-modified cellulose materials, using tetrabutyl titanate as a precursor, natural cellulose fibers as a substrate, and using a sol-gel method on the surface of natural cellulose Deposition of nano-layer titanium dioxide film, followed by self-assembly of long-chain alkylsilane-containing monolayer, to obtain superhydrophobic nano-modified cellulose material, but the deposition of titanium dioxide layer and the modification process of fluorosilane are cumbersome and the process conditions are complex

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) In a 250mL four-neck flask, add ethyl orthosilicate, heptadecafluorodecyltrimethoxysilane, deionized water, ammonia water and ethanol in sequence according to the volume ratio of 0.3:0.03:1:0.2:7. After stirring at 40°C for 10 hours, the surface-functionalized silica particle A dispersion was obtained; take 20 mL of the above-mentioned surface-functionalized silica particle A dispersion and add it to a four-necked flask, and then follow the formula 2.5:0.3:1.1:0.5 : 9 volume ratio was added sequentially tetraethyl orthosilicate, heptadecafluorodecyltrimethoxysilane, deionized water, ammonia water and ethanol to prepare a dispersion with a total volume of 500mL, after stirring at 25°C for 10h, Obtain the surface functionalized silica particle B dispersion;

[0033] (2) Add 0.8g of functionalized silica particles A and 0.4g of functionalized silica particles B after centrifugal washing to 95g of dimethylformamide, and after ultrasonic treatment for 15min, transfer to ...

Embodiment 2

[0037](1) In a 250mL four-neck flask, add tetraethyl orthosilicate, heptadecafluorodecyltrimethoxysilane, deionized water, ammonia water and ethanol in sequence according to the volume ratio of 0.2:0.03:1:0.2:6. After stirring at 40°C for 8 hours, the surface-functionalized silica particle A dispersion was obtained; 20 mL of the above-mentioned surface-functionalized silica particle A dispersion was added to a four-necked flask, according to 3:0.3:1:0.4: Add tetraethyl orthosilicate, heptadecafluorodecyltrimethoxysilane, deionized water, ammonia water and ethanol in turn at a volume ratio of 9 to prepare a dispersion with a total volume of 500mL, stir at 25°C for 6h, and obtain a surface Functionalized silica particle B dispersion;

[0038] (2) Add 0.5 g of functionalized silica particles A and 0.5 g of functionalized silica particles B to 95 g of dimethylformamide after centrifugal washing, and after ultrasonic treatment for 15 minutes, transfer to a container equipped with a...

Embodiment 3

[0042] (1) In a 250mL four-neck flask, add ethyl orthosilicate, phenyltrimethoxysilane, deionized water, ammonia water and ethanol in sequence according to the volume ratio of 0.2:0.03:1:0.2:6, After stirring for 8 hours, the surface-functionalized silica particle A dispersion was obtained; take 25mL of the above-mentioned surface-functionalized silica particle A dispersion and add it to a four-necked flask, according to the volume of 5:0.8:2:0.4:9 Add tetraethyl orthosilicate, phenyltrimethoxysilane, deionized water, ammonia water and ethanol in sequence to prepare a dispersion with a total volume of 500 mL, stir at 25 °C for 10 h, centrifuge and wash three times to obtain surface functionalization Silica particle B dispersion liquid;

[0043] (2) Add 1 g of functionalized silica particles A and 0.3 g of functionalized silica particles B after centrifugal washing to 95 g of dimethylformamide, and after ultrasonic treatment for 15 minutes, transfer to a container equipped with...

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Abstract

The invention relates to a preparation method of a super-hydrophobic cellulose material with a micro-nano structure. The method comprises the following steps: (1) adding ethyl orthosilicate and functionalized siloxane into an ethanol system containing deionized water to obtain a dispersion liquid of functionalized silica particles A in the presence of ammonium hydroxide serving as a catalyst; with the dispersion liquid of functionalized silica particles A as seeds, sequentially adding the ethyl orthosilicate, the functionalized siloxane, the deionized water, the ammonium hydroxide and the ethanol so as to obtain a dispersion liquid of functionalized silica particles B; (2) performing ultrasonic dispersion on the two types of functionalized silica particles in dimethylformamide, then adding a hydrophobic polymer and a low surface energy additive into the system and evenly stirring so as to form white dispersion liquid; and (3) coating the white dispersion liquid obtained in the step (2) on a natural cellulose material in a direct spraying manner or a spin coating manner so as to obtain the super-hydrophobic cellulose material with the micro-nano structure. The coating material has strong scouring resistance and acid-alkali resistance besides the excellent hydrophobic property.

Description

[0001] technical field [0002] The invention belongs to the field of chemical industry, and in particular relates to a preparation method of a superhydrophobic natural cellulose material with a micro-nano structure. [0003] Background technique [0004] Superhydrophobic materials refer to materials with a contact angle with water greater than 150°. Superhydrophobic materials have hydrophobic properties and self-cleaning capabilities of antifouling, waterproof and dustproof, and have very broad application prospects in people's daily life and industrial and agricultural production. Therefore, in recent years, the development of superhydrophobic materials preparation methods and related properties Research has become a hot spot of concern. Since the wettability of solid materials is mainly determined by the chemical composition and surface microscopic geometric structure, the preparation methods of superhydrophobic materials are mainly divided into two categories. One is t...

Claims

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Application Information

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IPC IPC(8): D06M11/79D06M15/256D06M13/513D06M15/233D06M15/643C01B33/12D06M101/06
Inventor 周永红尚倩倩
Owner 山东天洋新材料有限公司
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