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Method for preparing super-hydrophobic super-oleophylic cotton

A super-lipophilic and super-hydrophobic technology is applied in the field of preparation of super-hydrophobic and super-oleophilic cotton, which can solve the problems of high cost and high technical requirements, and achieve the effects of low cost, easy availability of raw materials and low energy consumption.

Active Publication Date: 2013-09-04
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention solves the technical problems of high technical requirements and high cost for the preparation of adsorbates for oil-water separation; and provides a method for preparing super-hydrophobic and super-oleophilic cotton

Method used

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  • Method for preparing super-hydrophobic super-oleophylic cotton
  • Method for preparing super-hydrophobic super-oleophylic cotton
  • Method for preparing super-hydrophobic super-oleophylic cotton

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specific Embodiment approach 1

[0023] Specific embodiment one: the preparation method of super-hydrophobic super-oleophilic cotton in the present embodiment is carried out according to the following steps:

[0024] step one 、 Mix 90mL of absolute ethanol, 10mL of tetraethyl orthosilicate and 10mL of deionized water, then add 5-10mL of ammonia water, and then magnetically stir until uniform at room temperature to obtain SiO 2 Precursor solution;

[0025] Step 2. Mix 100mL absolute ethanol, 1mL~2mL octadecyltrichlorosilane, (OTS) and 0.1mL~0.25mL deionized water, and then stir at room temperature for 2 hours to obtain the OTS modified solution;

[0026] Step 3. Soak the cotton in NaOH aqueous solution with a concentration of 2%~5% by mass, cover with a lid, boil on low heat for 5~10 minutes, then take out the cotton, rinse with water and rub at the same time until the pH of the washing solution is reached. The value is 7.0, dry naturally;

[0027] Step 4, soak the cotton treated in step 3 in the SiO prepar...

specific Embodiment approach 2

[0029] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the NaOH aqueous solution described in step three is prepared according to the following steps ： Weigh 2~5g of NaOH solid, dissolve in 100ml of deionized water, cool to room temperature, and set aside. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0030] Specific embodiment three: this embodiment and specific embodiment one or two are: the soaking time described in step four is 1-1.5 hours. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a method for preparing super-hydrophobic super-oleophylic cotton, and belongs to the field of functional materials, in order to solve the technical problems that an existing oil-water separation absorption object is high in preparation technique requirement, is high in cost and the like. The method provided by the invention comprises the following steps of: 1, preparing a SiO2 precursor solution; 2, preparing an OTS (octadecyltrichlorosilane) modified liquid; 3, immersing cotton in a NaOH water solution, capping, boiling, cooking on low heat, and cooling; 4, then immersing into the SiO2 precursor solution, flushing with absolute ethyl alcohol clearly, and drying at room temperature, thereby obtaining the super-hydrophobic / super-oleophylic cotton. Each gram of super-hydrophobic / super-oleophylic cotton material can absorb 10-40grams of organics, and can be recycled. The method provided by the invention is simple in technology, is low in cost, is short in cycle, is low in energy consumption, and does not need a complex special device.

Description

technical field [0001] The invention belongs to the field of functional materials; in particular, it relates to a preparation method of superhydrophobic and superoleophilic cotton. Background technique [0002] In recent years, water pollution caused by oil spills, urbanization and over-industrialization has become more and more serious. At present, many methods such as mechanical extraction, in-situ combustion, chemical degradation, etc. are used to clean and purify oil-contaminated waters. Due to the better economic and environmental benefits of oil adsorbents, the use of oil adsorbents to transfer and absorb oil is considered to be a very effective method. There are two main factors affecting the wettability of solid surfaces: one is the microscopic rough structure of the solid surface; the other is the chemical composition of the solid surface. In recent years, people have continued to study the special wetting surfaces in nature, and the preparation methods and techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/79D06M13/513B01D17/022D06M101/06
Inventor 王成毓刘峰
Owner NORTHEAST FORESTRY UNIVERSITY
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