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Method for preparing lyophobic silicon dioxide for VOC (Volatile Organic Compound) adsorption

A hydrophobic silica and silica technology, applied in the directions of silica, silica, chemical instruments and methods, can solve the problems of high cost, insufficient environmental protection, increased wood consumption, etc., and achieve simple production process and hydrophobic performance. stable effect

Inactive Publication Date: 2017-09-05
德清美联新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Activated carbon is mainly made of wood, which will increase the consumption of wood, is not environmentally friendly, and has a high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for preparing hydrophobic silica for VOC adsorption, the preparation method comprising the steps of:

[0025] (1) Nitric acid, deionized water and absolute ethanol are made into mixed solution in Erlenmeyer flask, stir 3min;

[0026] (2) Silica silicon source tetraethyl orthosilicate, absolute ethanol and deionized water are made into a mixed solution, and the weight ratio of silicon dioxide silicon source, absolute alcohol and deionized water is 1:3.0:6.0, Then add the composite coupling agent, the composite coupling agent consists of a phenyl ring group-containing silane coupling agent phenyltrimethoxysilane, a linear alkyl group-containing silane coupling agent n-octyltriethoxysilane And a silane coupling agent containing epoxy group 2-(3,4-epoxycyclohexyl) ethyltriethoxysilane, a silane coupling agent containing benzene ring group, a silane coupling agent containing linear The amount of alkyl group silane coupling agent and a kind of epoxy group-containing...

Embodiment 2

[0032] A method for preparing hydrophobic silica for VOC adsorption, the preparation method comprising the steps of:

[0033] (1) Nitric acid, deionized water and absolute ethanol are made into mixed solution in Erlenmeyer flask, stir 3min;

[0034] (2) Silica silicon source tetraethyl orthosilicate, absolute ethanol and deionized water are made into a mixed solution, and the weight ratio of silicon dioxide silicon source, absolute alcohol and deionized water is 1:3.5:6.2, Then add the composite coupling agent, the composite coupling agent consists of a benzene ring group-containing silane coupling agent diphenyldimethoxysilane, a linear alkyl group-containing silane coupling agent dodecyl trimethoxy base silane and an epoxy group-containing silane coupling agent 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, a benzene ring-containing silane coupling agent, a straight The addition amount of alkane group silane coupling agent and a kind of epoxy group-containing silane coupling...

Embodiment 3

[0040] A method for preparing hydrophobic silica for VOC adsorption, the preparation method comprising the steps of:

[0041] (1) Nitric acid, deionized water and absolute ethanol are made into mixed solution in Erlenmeyer flask, stir 3min;

[0042] (2) Silica silicon source tetraethyl orthosilicate, absolute ethanol and deionized water are made into mixed solution, the weight ratio of silicon dioxide silicon source, absolute alcohol and deionized water is 1:3.8:6.4, Then add the composite coupling agent, the composite coupling agent consists of a phenyl ring group-containing silane coupling agent methylphenyldimethoxysilane, a linear alkyl group-containing silane coupling agent n-propyltrimethoxy base silane and an epoxy group-containing silane coupling agent 3-(2,3-glycidoxy)propyltrimethoxysilane, a benzene ring-containing silane coupling agent, a straight The addition amount of alkane group silane coupling agent and a kind of epoxy group-containing silane coupling agent i...

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PUM

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Abstract

The invention discloses a method for preparing lyophobic silicon dioxide for VOC (Volatile Organic Compound) adsorption. The method comprises the following steps: (1) mixing nitric acid, deionized water and absolute ethyl alcohol in a container so as to obtain a mixed liquid; (2) mixing a silicon dioxide source, the absolute ethyl alcohol and the deionized water so as to obtain another mixed liquid, adding a composite coupling agent, and uniformly stirring; (3) pouring the solution obtained in the step (2) into the mixed liquid obtained in the step (1), keeping the pH value of the solution within 2-6, and stirring for several hours; (4) sealing the container, and aging for 2 hours; (5) performing suction filtration on gel which is subjected to surface modification and is interchanged with a solvent, washing, and leaving to stand at normal temperature; and (6) drying the washed gel, and performing airflow superfine crushing, thereby obtaining a finished product. By adopting the method for preparing the lyophobic silicon dioxide for VOC adsorption, the lyophobic silicon dioxide is capable of adsorbing different types of VOC molecules, and not only is the environment protected, but also the cost is low.

Description

technical field [0001] The invention relates to a method for preparing hydrophobic silica used for VOC adsorption, and belongs to the technical field of coating agents. Background technique [0002] VOC is the English abbreviation of volatile organic compounds (volatile organic compounds). It is volatile and will participate in atmospheric photochemical reactions. It is a volatile organic compound that can cause harm. VOC stands for Volatile Organic Compounds, which have a huge impact on human health. When the VOC in the room reaches a certain concentration, people will feel headache, nausea, vomiting, fatigue, etc. in a short time. decline and other serious consequences. The paint used in the process of home decoration is one of the main sources of indoor VOC. VOC outdoors mainly comes from fuel combustion and transportation. [0003] In the organic waste gas treatment process, adsorption is one of the most effective and widely used methods, and the adsorbent is mainly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/141C01B33/143C01B33/16B01J20/22B01J20/30B01D53/02
CPCB01D53/02B01D2257/708B01J20/103B01J20/22C01B33/141C01B33/143C01B33/16C01B33/163Y02A50/20
Inventor 蔡烈
Owner 德清美联新材料科技有限公司
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