A kind of nanocomposite material and preparation method thereof

Abstract

The invention discloses an organic-inorganic nanocomposite mesoporous nanosilicon-poly (p-vinyl benzyl)-triethylmethylammonium tetrafluoroborate (P{VBTMA}{BF4}) with high CO2 adsorption performance. The nanocomposite is mesoporous nanosilicon wrapped by a quaternary ammonium salt polyion liquid; the molecular weight Mn of an obtained shell-layer graft polymer is calculated via a nuclear magnetic resonance (NMR) spectrogram by using an initiator sacrificing method, wherein the NMR is between 4740 and 13684. The nanocomposite disclosed by the invention can serve as a CO2 adsorbent with superior performance under a certain condition. A method for preparing the nanocomposite is simple and convenient to operate and moderate in reaction condition; the structure of the nanocomposite obtained by using the method is definitely easy to regulate and control.

Description

technical field

[0001] The invention relates to a nanocomposite material, in particular to a 2 An organic-inorganic nanocomposite material with adsorption properties and a core-shell mechanism and a preparation method thereof. Background technique

[0002] The climate change caused by the "greenhouse effect" has become a global environmental problem, and it has attracted more and more attention from all countries in the world. Among the various greenhouse gases, CO 2 It has a high content in the atmosphere and a long life span of about 50-200 years. It contributes the most to the greenhouse effect. How to reduce CO 2 emissions, reducing CO in the atmosphere 2 Concentration is a common problem faced by human beings. At the same time, CO 2 It is also a very important industrial raw material, and CO is captured and recovered from the flue gas of the power plant 2 Not only to alleviate CO 2 The most direct and effective means of the emission crisis, but also through the ...

Examples

Embodiment 1

[0050] The organic-inorganic nanocomposite material in this example is prepared through the following steps:

[0051] 1) Preparation of mesoporous nano-silica atom transfer radical surface initiator:

[0052] a) First, add 1 part of mesoporous nano-silica in the reactor according to the mass ratio, dissolve it with toluene, and disperse it ultrasonically. After sealing, vacuumize the reactor and pass high-purity nitrogen, and add 1 part of 3 -Aminopropyltrimethoxysilane, reflux reaction at 80°C in an oil bath for 12 hours; centrifuge the product, pour off the upper solvent, wash it with toluene and acetone ultrasonically in turn, remove the adsorbed silane coupling agent, and dry it under vacuum at 45°C A silane coupling agent-modified nano silicon dioxide is obtained.

[0053] b) Add 1 part of nano-silica modified by silane coupling agent into the reactor according to the mass ratio, dissolve it with toluene, disperse it ultrasonically, vacuumize the reactor after sealing an...

Embodiment 2

[0065] In this embodiment, the organic-inorganic nanocomposite material has the following differences from Example 1 through the following steps, and all the others are the same:

[0066] 3 parts of 3-aminopropyltrimethoxysilane in step a) of step 1), 1.5 parts of triethylamine in b) and 2.16 parts of 2-bromoisobutyryl bromide;

[0067] Step 2) 3 parts of 2-bromoisobutyryl bromide;

[0068] Step 3) sodium fluoroborate is 3 parts;

[0069] Step 4) 1.5 parts of CuCl, 1.5 parts of 1,1,4,7,7-pentamethyldiethylenetriamine, 0.1 parts of TMS-EBMP, ionic liquid monomer (p-vinylbenzyl)- Trimethyl ammonium tetrafluoroborate is 100 parts.

[0070] Measure the molecular weight M of the surface polymer of the composite material obtained by sacrificing the initiator method in the present embodiment n,NMR for 8160.

Embodiment 3

[0072] In this embodiment, the organic-inorganic nanocomposite material has the following differences from Example 1 through the following steps, and all the others are the same:

[0073] The reaction temperature in a) of step 1) is 120°C, the reflux time is 24 hours, and the reaction temperature in step b) is 30°C and the reaction time is 30 hours;

[0074] In step 2), the reaction temperature is 30° C. and the reaction time is 30 hours;

[0075] In step 3), the reaction temperature is 30° C. and the reaction time is 24 hours;

[0076] Step 4) The reaction temperature is 85°C and the reaction time is 12 hours.

[0077] Measure the molecular weight M of the surface polymer of the composite material obtained by sacrificing the initiator method in the present embodiment n,NMR for 6581.

technical field

[0001] The invention relates to a nanocomposite material, in particular to a 2 An organic-inorganic nanocomposite material with adsorption properties and a core-shell mechanism and a preparation method thereof. Background technique

[0002] The climate change caused by the "greenhouse effect" has become a global environmental problem, and it has attracted more and more attention from all countries in the world. Among the various greenhouse gases, CO 2 It has a high content in the atmosphere and a long life span of about 50-200 years. It contributes the most to the greenhouse effect. How to reduce CO 2 emissions, reducing CO in the atmosphere 2 Concentration is a common problem faced by human beings. At the same time, CO 2 It is also a very important industrial raw material, and CO is captured and recovered from the flue gas of the power plant 2 Not only to alleviate CO 2 The most direct and effective means of the emission crisis, but also through the ...

Examples

Embodiment 1

[0050] The organic-inorganic nanocomposite material in this example is prepared through the following steps:

[0051] 1) Preparation of mesoporous nano-silica atom transfer radical surface initiator:

[0052] a) First, add 1 part of mesoporous nano-silica in the reactor according to the mass ratio, dissolve it with toluene, and disperse it ultrasonically. After sealing, vacuumize the reactor and pass high-purity nitrogen, and add 1 part of 3 -Aminopropyltrimethoxysilane, reflux reaction at 80°C in an oil bath for 12 hours; centrifuge the product, pour off the upper solvent, wash it with toluene and acetone ultrasonically in turn, remove the adsorbed silane coupling agent, and dry it under vacuum at 45°C A silane coupling agent-modified nano silicon dioxide is obtained.

[0053] b) Add 1 part of nano-silica modified by silane coupling agent into the reactor according to the mass ratio, dissolve it with toluene, disperse it ultrasonically, vacuumize the reactor after sealing an...

Embodiment 2

[0065] In this embodiment, the organic-inorganic nanocomposite material has the following differences from Example 1 through the following steps, and all the others are the same:

[0066] 3 parts of 3-aminopropyltrimethoxysilane in step a) of step 1), 1.5 parts of triethylamine in b) and 2.16 parts of 2-bromoisobutyryl bromide;

[0067] Step 2) 3 parts of 2-bromoisobutyryl bromide;

[0068] Step 3) sodium fluoroborate is 3 parts;

[0069] Step 4) 1.5 parts of CuCl, 1.5 parts of 1,1,4,7,7-pentamethyldiethylenetriamine, 0.1 parts of TMS-EBMP, ionic liquid monomer (p-vinylbenzyl)- Trimethyl ammonium tetrafluoroborate is 100 parts.

[0070] Measure the molecular weight M of the surface polymer of the composite material obtained by sacrificing the initiator method in the present embodiment n,NMR for 8160.

Embodiment 3

[0072] In this embodiment, the organic-inorganic nanocomposite material has the following differences from Example 1 through the following steps, and all the others are the same:

[0073] The reaction temperature in a) of step 1) is 120°C, the reflux time is 24 hours, and the reaction temperature in step b) is 30°C and the reaction time is 30 hours;

[0074] In step 2), the reaction temperature is 30° C. and the reaction time is 30 hours;

[0075] In step 3), the reaction temperature is 30° C. and the reaction time is 24 hours;

[0076] Step 4) The reaction temperature is 85°C and the reaction time is 12 hours.

[0077] Measure the molecular weight M of the surface polymer of the composite material obtained by sacrificing the initiator method in the present embodiment n,NMR for 6581.

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