Preparation method and application of three-element siloxane sponge

A siloxane sponge and siloxane technology, applied in the direction of separation methods, chemical instruments and methods, grease/oily substances/floating matter removal devices, etc., can solve the problems of low mechanical properties and achieve low density and fast oil absorption speed , the effect of fast absorption rate

Active Publication Date: 2014-12-10
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Overcome the problem of generally low mechanical properties of binary siloxane sponges reported so far,

Method used

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  • Preparation method and application of three-element siloxane sponge
  • Preparation method and application of three-element siloxane sponge
  • Preparation method and application of three-element siloxane sponge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] a. Hydrolysis of alkoxysilane to form a sol: 6.0g (0.0165mol) of cetyltrimethylammonium bromide was added to 130mL (7.2222mol) of sulfuric acid solution with pH = 2, and then 1.0g (0.0048mol) was added successively ) Tetraethoxysilane, 14g (0.1028mol) methyltrimethoxysilane, 31g (0.2579mol) dimethyldimethoxysilane, react for 1h under magnetic stirring at room temperature, add 30g (0.4995mol) Urea, and continue to stir for 0.5h to obtain a clear sol solution;

[0029] b. Gelation of the sol: put the sol solution obtained in step a into a closed beaker system, and gelatinize at a temperature of 90° C. for 3 hours to obtain a silicone sponge;

[0030] c. Cleaning and drying of the siloxane sponge: the siloxane sponge obtained in step b is sequentially soaked and squeezed with methanol, deionized water, and methanol for 0.5h, and then placed at a temperature of 40 °C for 9 hours to obtain a tertiary siloxane sponge.

Embodiment 2

[0032] a. Hydrolysis of alkoxysilane to form a sol: 3.9g (0.0123mol) cetyltrimethylammonium chloride was added to 150mL (8.3333mol) of nitric acid solution with pH = 3.5, and then 3.7g (0.0240mol) was added successively ) tetramethoxysilane, 17g (0.0954mol) methyltriethoxysilane, 46.9g (0.2662mol) diethyldiethoxysilane, reacted for 0.5h under magnetic stirring at room temperature, and added 50ml ( 0.75mol) ethylenediamine and continued to stir for 1h to obtain a clear sol solution;

[0033] b. Gelation of the sol: put the sol solution obtained in step a into a closed beaker system, and gelatinize at a temperature of 70° C. for 9 hours to obtain a silicone sponge;

[0034] c. Cleaning and drying of the siloxane sponge: the siloxane sponge obtained in step b is sequentially soaked and squeezed with ethanol, deionized water, and ethanol for 0.5 hours, and then placed at a temperature of 35 Dry at °C for 12 hours to obtain a tertiary silicone sponge.

Embodiment 3

[0036] a. Hydrolysis of alkoxysilane to form a sol: 8.0g (0.0220mol) of cetyltrimethylammonium bromide was added to 170mL (9.4444mol) of hydrochloric acid solution with pH=5, and then 12.7g (0.0480mol) of ) tetrapropoxysilane, 13.1g (0.0881mol) vinyltrimethoxysilane, 32.9g (0.2745mol) dimethyldimethoxysilane, reacted for 0.5h under magnetic stirring at room temperature, and added 60g ( 0.4110mol) triethylenetetramine and continue to stir 1h, obtain clear sol solution;

[0037] b. Gelation of the sol: put the sol solution obtained in step a into a closed beaker system, and gelatinize at a temperature of 80° C. for 12 hours to obtain a silicone sponge;

[0038] c. Cleaning and drying of the siloxane sponge: the siloxane sponge obtained in step b is sequentially soaked and extruded in isopropanol, deionized water, and isopropanol for 0.5h each soaking and extruding, and then Dry at a temperature of 25°C for 24 hours to obtain a tertiary siloxane sponge.

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Abstract

The invention relates to a preparation method and application of three-element siloxane sponge, belonging to the technical field of preparation and application of environmental functional materials. The method comprises the following steps: alkoxy silane hydrolysis, gelation, product washing and drying. Compared with the traditional two-element siloxane sponge, the three-element siloxane sponge contains abundant non-polar groups and higher roughness on the surface, and is endowed with the superhydrophobic and superoleophylic effects; the contact angle with water exceeds 160 degrees; and the material has excellent mechanical properties. The preparation method is simple to operate, has the advantages of cheap raw materials and the like, and can easily implement large-scale preparation. The three-element siloxane sponge has the advantages of low density, excellent compression resistance, high oil absorption speed, high oil absorption power and the like, has wide application prospects in the fields of organic chemical solvent treatment, oily wastewater treatment, oil spillage treatment and the like, and is a novel efficient oil-water separation material.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of environmental functional materials, and specifically relates to a preparation method and application of a ternary siloxane sponge. Background technique [0002] The consumption of petroleum products is increasing worldwide. At the same time, there are continuous leaks of crude oil and petroleum products in its extraction, processing, transportation and other links, which has brought a heavy blow to the ecosystem. For example, the oil spill in the Gulf of Mexico in 2010 not only seriously affected the ecological balance of the local ocean and coastline, but also affected farther ocean areas due to the spread of crude oil, resulting in the death of a large number of fish, birds and marine life. When an oil spill accident occurs, how to quickly collect oil floating on the water surface and realize oil-water separation has become the key to deal with the oil spill problem, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/00C08J9/36C08G77/04B01D17/022C02F1/40
Inventor 马鹏程穆磊
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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