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A kind of method of simple superhydrophobic modification melamine sponge

A technology of superhydrophobic modification and melamine sponge, which is applied in the modification of superhydrophobic-superoleophilic melamine sponge, superhydrophobic sponge and its preparation field, which can solve the problems of complex and expensive equipment, poor stability of modified materials, and limitations Industrial application and other issues, to achieve the effect of excellent recycling performance, low price, good adsorption capacity and selective separation ability of oil and water

Active Publication Date: 2022-01-28
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some inherent defects also exist in these modification processes, such as poor stability of modified materials, harmful to the environment, time-consuming and energy-consuming modification process, complex and expensive equipment and reagents, etc., which limit this type of modification method industrial application of

Method used

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  • A kind of method of simple superhydrophobic modification melamine sponge
  • A kind of method of simple superhydrophobic modification melamine sponge
  • A kind of method of simple superhydrophobic modification melamine sponge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Take a cut melamine sponge and completely immerse it in the prepared dilute nitric acid solution with a concentration of 0.5mol / L. After soaking for 60 minutes, the sponge was taken out and squeezed dry. After washing the surface of the sponge with water, and drying it in an oven at 60 °C, a superhydrophobic-superoleophilic modified melamine sponge can be obtained.

[0024] The superhydrophobic modified melamine sponge prepared according to Example 1 was tested by a contact angle meter ( figure 1 ), the average hydrophobic angle is 156.7±2.0°, which shows that the sponge has excellent hydrophobicity.

[0025] Schematic diagram of the hydrophobic and lipophilic properties of the superhydrophobic modified melamine sponge prepared according to Example 1 ( figure 2 ), the water droplets form a spherical shape and stand stably on the surface of the sponge, while the oil droplets have quickly penetrated into the sponge, which shows the excellent superhydrophobicity-superol...

Embodiment 2

[0027] The cut commercial melamine sponge was completely immersed in the prepared dilute nitric acid solution with a concentration of 0.75 mol / L. The sponge was taken out after soaking for 30 minutes and squeezed dry. The sponge was washed several times with water to remove excess nitric acid, and then dried in an oven at 60 °C to obtain a superhydrophobic melamine sponge. The microscopic morphology of the sponge before modification, such as Figure 4 (a,b); the modified microstructures, such as Figure 4 (c, d).

[0028] To sum up, the present invention discloses a simple method for superhydrophobic modification of melamine sponge. The process of super-hydrophobic modified sponge by dilute nitric acid of the present invention has high efficiency, does not need complicated instruments and equipment, and is easy to prepare on a large scale. The nitric acid used in the modification has the characteristics of wide source and low price, and the obtained sponge is non-toxic and...

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Abstract

The invention discloses a method for superhydrophobic modification of melamine sponge. The method comprises the following steps: after one-step immersion of commercial melamine sponge in dilute nitric acid solution, and then simply washing and drying, the amphiphilic modification can be realized. Superhydrophobic modification of melamine sponges. Nitric acid has a wide range of sources, is cheap and easy to obtain, and has obvious effects in modifying melamine sponge. The prepared modified melamine sponge is superhydrophobic, and has excellent compression resistance and recycling performance. This method solves the problems of high production cost, complicated modification process and toxic and harmful materials / reagents existing in the existing method of superhydrophobic modified melamine sponge. It is a new, simple and efficient modification strategy. It has broad application prospects in the field of material preparation.

Description

technical field [0001] The invention belongs to the field of preparation and application of environmental functional materials, relates to a superhydrophobic sponge and a preparation method thereof, and in particular relates to a simple, efficient and low-cost modification method of a superhydrophobic-superoleophilic melamine sponge. Background technique [0002] With the rapid development of global industry, petrochemical, textile manufacturing, metal processing and other industries discharge a large amount of oily wastewater, which has caused great harm to the environment and human health. Frequent oil spills, such as the "Sanchi" oil tanker spill in 2018 and the Bohai Bay oil spill in 2011, led to a large amount of oil pouring into the ocean and causing serious ecological damage. In recent years, with the rapid development of science and technology, superhydrophobic materials for separating oil / water mixed pollutants have received extensive attention. Melamine sponges wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/40C08L61/28
CPCC08J9/40C08J2361/28
Inventor 周莹刘帅卓张骞肖文艳刘宁王芳于姗
Owner SOUTHWEST PETROLEUM UNIV
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