Lignin-silicon dioxide nanocomposite particle as well as preparation method and application of lignin-silicon dioxide nanocomposite particle

A silicon dioxide and nanocomposite technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of poor compatibility, complex composition, difficult chemical modification, etc., achieve excellent selective adsorption performance of heavy metal ions, improve Dispersibility and thermal stability, overcoming difficult processing effects

Active Publication Date: 2015-08-05
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the complex molecular structure and composition of lignin with large differences, especially the low content of lignin active groups, closedness, difficul

Method used

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  • Lignin-silicon dioxide nanocomposite particle as well as preparation method and application of lignin-silicon dioxide nanocomposite particle
  • Lignin-silicon dioxide nanocomposite particle as well as preparation method and application of lignin-silicon dioxide nanocomposite particle
  • Lignin-silicon dioxide nanocomposite particle as well as preparation method and application of lignin-silicon dioxide nanocomposite particle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Preparation of bromine-based nano-silica

[0036] Put 1.0g of nano-silica and 60mL of toluene in a round bottom flask, add 0.5mL of 3-bromopropyltrichlorosilane dropwise, and react at 80°C for 24h. After static filtration, the white filter cake was washed with toluene and absolute ethanol to remove excess 3-bromopropyltrichlorosilane, and after freeze-drying, a white solid bromine-based nano-silica was obtained.

[0037] (2) Preparation of azide-based nano-silica

[0038] Add 0.6g of bromo-based nano-silica, 0.4g of sodium azide and 160mL of N,N-dimethylformamide solution into a 250mL three-necked flask, heat to 80°C, and react under nitrogen atmosphere for 24h. The reaction solution was centrifuged for 3 times, filtered to obtain a crude product, and freeze-dried to obtain a white powder product azido-based nano-silicon dioxide.

[0039] (3) Preparation of alkynyl lignin

[0040] Dissolve 4.0g of bamboo lignin in 80mL of 0.5mol / L sodium hydroxide solution, add 4...

Embodiment 2

[0045] (1) Preparation of bromine-based nano-silica

[0046] Put 2.0g of nano-silica and 60mL of toluene in a round bottom flask, add 0.5mL of 11-bromoundecyltrichlorosilane dropwise, and react at 90°C for 24h. After static filtration, the white filter cake was washed with toluene and absolute ethanol to remove excess 11-bromoundecyltrichlorosilane, and after freeze-drying, a white solid bromine-based nano-silica was obtained.

[0047] (2) Preparation of azide-based nano-silica

[0048] Add 0.8g of bromo-based nano-silica, 0.8g of sodium azide and 150mL of N,N-dimethylformamide solution into a 250mL three-necked flask, heat to 80°C, and react under nitrogen atmosphere for 24h. The reaction solution was filtered through a G-4 type sand core funnel to obtain a crude product, which was freeze-dried to obtain a white powder product azido-based nano-silicon dioxide.

[0049] (3) Preparation of alkynyl lignin

[0050] Dissolve 5.0g of alkali lignin in 80mL of 0.5mol / L sodium hydr...

Embodiment 3

[0056] (1) Preparation of chlorine-based nano-silica

[0057] Put 1.5g of nano-silica and 60mL of toluene into a round bottom flask, add 0.5mL of 3-chloropropyltrichlorosilane dropwise, and react at 90°C for 24h. After static filtration, the white filter cake was washed with toluene and absolute ethanol to remove excess 3-chloropropyltrichlorosilane, and after freeze-drying, a white solid bromine-based nano-silica was obtained.

[0058] (2) Preparation of azide-based nano-silica

[0059] Add 0.7g of chlorine-based nano-silica, 0.8g of sodium azide and 150mL of N,N-dimethylformamide solution into a 250mL three-necked flask, heat to 80°C, and react under nitrogen atmosphere for 24h. The reaction solution was filtered through a G-4 type sand core funnel to obtain a crude product, which was freeze-dried to obtain a white powder product azido-based nano-silicon dioxide.

[0060] (3) Preparation of alkynyl lignin

[0061] Dissolve 5.0g high boiling alcohol lignin in 80mL sodium h...

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Abstract

The invention discloses a lignin-silicon dioxide nanocomposite particle as well as a preparation method and application of the lignin-silicon dioxide nanocomposite particle. The method comprises the steps of firstly, introducing an azido structure on the surface of a nano silicon dioxide particle by virtue of alkylation reaction, and preparing alkynyl lignin from lignin; then, reacting alkynyl lignin and triazo nano silicon dioxide under the catalytic action of Cu (I) to prepare the lignin-silicon dioxide nanocomposite particle containing a triazole structural unit. The lignin-silicon dioxide nanocomposite particle prepared according to the characteristics of click reaction temperature, high speed and good specificity has favorable dispersibility and thermal stability and good selective heavy metal ion adsorption performance, has the Cu<2+> adsorption capacity of 120-135mg/g, and can be applied to the field of ion adsorption materials and the like.

Description

technical field [0001] The invention relates to an organic-inorganic nanocomposite material and a preparation method thereof, in particular to a method for preparing lignin-silicon dioxide nanocomposite particles by click reaction. Background technique [0002] Lignin is a natural polymer compound whose reserves are second only to cellulose in nature, and is an important renewable biomass resource. With the increasingly serious impact of the development and utilization of petroleum resources on the environment, it has become a hot spot in the research and development of new materials to effectively replace traditional petrochemical resources with natural biomass resources such as lignin to prepare high-performance materials. However, due to the complex molecular structure and composition of lignin with large differences, especially the low content of lignin active groups, closedness, difficult chemical modification, and poor compatibility with other matrix materials, the app...

Claims

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Application Information

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IPC IPC(8): C08L97/00C08K9/06C08K9/02C08K9/04C08K3/36C08H7/00B01J20/24
Inventor 金灿熊凯孔振武
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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