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Preparation method for superhydrophobic superoleophilic straw fiber

A technology of straw fiber and super-oleophilicity, applied in separation methods, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of weak adsorption capacity of inorganic mineral oil-absorbing materials and high cost of organic synthetic oil-absorbing materials, and achieve selectivity Good adsorption performance, excellent oil absorption performance, and the effect of avoiding secondary pollution

Active Publication Date: 2015-12-02
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adsorption capacity of inorganic mineral oil-absorbing materials is weak, and the cost of organic synthetic oil-absorbing materials is relatively high

Method used

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  • Preparation method for superhydrophobic superoleophilic straw fiber
  • Preparation method for superhydrophobic superoleophilic straw fiber
  • Preparation method for superhydrophobic superoleophilic straw fiber

Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0021] Specific Embodiments 1. In this embodiment, taking corn stalk fiber as an example, a method for preparing superhydrophobic and super lipophilic straw fiber is carried out according to the following steps:

[0022] 1. After drying the discarded straw, put it into a pulverizer to pulverize it, pass through a 60-mesh sieve, immerse the straw fiber in a sodium hydroxide solution with a mass fraction of 5%, and pretreat it for 10 hours under the condition of magnetic stirring. The pure water was washed repeatedly until the pH was close to neutral, and dried in an oven at 40°C to constant weight to obtain straw fibers.

[0023] 2. Measure 80mL of absolute ethanol, 2ml of ultrapure water, 2ml of tetraethyl orthosilicate, and 1ml of ammonia water into a 250ml beaker in turn, and stir on a magnetic stirrer at room temperature, then add 0.3g of straw fiber and continue stirring After 2 hours, the straw fibers were filtered out with a nylon filter, washed with ultrapure water and ...

specific Embodiment approach 2

[0031] Specific implementation mode 2. In this implementation mode, taking corn stalk fiber as an example, a method for preparing superhydrophobic and super lipophilic straw fiber is carried out according to the following steps:

[0032] 1. After drying the discarded straw, put it into a pulverizer for crushing, pass through an 80-mesh sieve, immerse the straw fiber in a sodium hydroxide solution with a mass fraction of 7%, pretreat for 14 hours under magnetic stirring conditions, and use an ultra- Wash with pure water repeatedly until the pH is close to neutral, and dry in an oven at 50°C until constant weight.

[0033] 2. Measure 120mL of absolute ethanol, 5mL of ultrapure water, 5mL of tetraethyl orthosilicate, and 2mL of ammonia water into a 250ml beaker in turn, stir magnetically at room temperature, then add 0.5g of straw fiber, continue to stir for 4 hours, and use a nylon filter to Straw fibers were filtered out, washed with ultrapure water and absolute ethanol in sequ...

specific Embodiment approach 3

[0037] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the reaction temperature in step 3 is 70°C. Other steps and parameters are the same as in the first embodiment.

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Abstract

The invention discloses a preparation method for superhydrophobic superoleophilic straw fiber, belonging to the technical field of functional materials. The objective of the invention is to provide the preparation method for the superhydrophobic superoleophilic straw fiber which has cheap and easily-available raw materials, high oleophilic property and biodegradability. The method in the invention comprises the following steps: step 1, crushing straw, soaking the crushed straw in an alkali solution and carrying out pretreatment, and carrying out washing and drying; step 2, with tetraethyl orthosilicate as a silicon source, ammonia water as a catalyst and absolute ethyl alcohol as a solvent, carrying out in-situ synthesis so as to obtain straw fiber with surface loaded with silicon dioxide particles; step 3, dissolving zinc nitrate in a sodium hydroxide aqueous solution, and carrying out vigorous stirring, centrifugal separation and drying so as to obtain zinc oxide particles; step 4, preparing octyltriethoxysilane modified liquid; and step 5, taking the straw fiber in the step 2 and zinc oxide in the step 3, adding the straw fiber and the zinc oxide into the above-mentioned modified liquid, carrying out uniform mixing and dispersing, carrying out filtering separation so as to obtain the straw, and carrying out drying. The superhydrophobic superoleophilic straw fiber prepared by the method in the invention has excellent superoleophilic property and wide application space in the field of marine spilled oil cleaning.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and relates to a preparation method of superhydrophobic and superoleophilic straw fibers. Background technique [0002] In recent years, with the acceleration of my country's industrialization process, accidental oil spills have occurred frequently. According to statistics, an average of 500 to 1,000 tons of oil pollutants are injected into the ocean every year, resulting in more and more serious water pollution. How to properly deal with oil spills at sea become an urgent problem to be solved. Bioremediation, in-situ combustion, and mechanical extraction are three commonly used ways to deal with oil spills. Among them, mechanical extraction using oil-absorbing materials is the cheapest and most effective method, and can recycle oil spills. The adsorption capacity of inorganic mineral oil-absorbing materials is relatively weak, and the cost of organic synthetic oil-absorbing material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/40
Inventor 王成毓臧德利
Owner NORTHEAST FORESTRY UNIVERSITY
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