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Plant fiber based solid amine adsorption material, preparation method and application thereof

A technology of plant fibers and adsorption materials, which is applied in the field of plant fiber-based solid amine adsorption materials and its preparation, can solve the problems that the adsorption capacity of materials cannot be further improved, and the adsorption sites of solid amine fibers are limited, so as to achieve the improvement of adsorption capacity , good thermal and chemical stability, and large adsorption capacity

Active Publication Date: 2015-10-21
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the prior art, although the adsorption materials based on plant fibers have also undergone grafting and amino functionalization reactions during the preparation process, they have basically only realized the individual grafting modification of cellulose or lignin. The adsorption sites on the prepared solid amine fibers are limited, and the adsorption capacity of the final material cannot be further improved

Method used

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  • Plant fiber based solid amine adsorption material, preparation method and application thereof
  • Plant fiber based solid amine adsorption material, preparation method and application thereof
  • Plant fiber based solid amine adsorption material, preparation method and application thereof

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Embodiment 1

[0044] 1. Preparation

[0045] (1) According to the mass ratio of lignin: formaldehyde: ethylenediamine in bagasse, which is 1:1.5:5, add it into 100mL solvent and mix evenly, and react for 4h at 25°C under ultrasonic vibration with power of 100, After the reaction is completed, rinse with water and ethanol repeatedly, filter with suction, and dry at 45° C. to obtain bagasse-based Mannich base lignin-cellulose.

[0046] (2) The bagasse-based Mannich base lignin-cellulose will be placed in 5wt% NaIO 4 In an aqueous solution, in an ultrasonic vibration with a power of 100, the oxidation reaction was carried out at 25°C for 3 hours. After the reaction was completed, it was repeatedly washed with water and ethanol, filtered with suction, and dried at 45°C to obtain bagasse-based Mannich base lignin-bis Aldehyde fibers;

[0047] (3) Mix bagasse-based Mannich base lignin-dialdehyde fibers with 5wt% polyethyleneimine aqueous solution with a molecular weight of 1800g / mol, amination ...

Embodiment 2

[0052] 1. Preparation

[0053] (1) According to the mass ratio of lignin in sisal: formaldehyde: diethylenetriamine is 1:3:9, add 100mL of water and mix evenly, and react at 40°C for 10h in an ultrasonic vibration with a power of 200W. After the reaction is completed, it is repeatedly washed with water and ethanol, filtered with suction, and dried at 45° C. to obtain sisal-based Mannich base lignin-cellulose.

[0054] (2) Put sisal-based Mannich base lignin-cellulose in 15wt% NaIO 4 In an aqueous solution, in an ultrasonic vibration with a power of 300W, the oxidation reaction was carried out at 50°C for 6 hours. After the reaction was completed, it was repeatedly rinsed with water and ethanol, filtered with suction, and dried at 45°C to obtain sisal-based Mannich base lignin-bis Aldehyde fibers;

[0055] (3) Mix sisal-based Mannich base lignin-dialdehyde fibers with 10wt% polyethyleneimine aqueous solution with a molecular weight of 10000g / mol, amination reaction at 50°C fo...

Embodiment 3

[0060] 1. Preparation

[0061] (1) According to the mass ratio of lignin: formaldehyde: triethylenetetramine in corncobs of 1:3:9, add it into 100mL of methanol and mix evenly, and react at 60°C for 48h in an ultrasonic vibration with a power of 400W. After the reaction is completed, rinse with water and ethanol repeatedly, filter with suction, and dry at 45° C. to obtain bagasse-based Mannich base lignin-cellulose.

[0062] (2) The corncob-based Mannich base lignin-cellulose will be placed in 20wt% NaIO 4 In an aqueous solution, in an ultrasonic vibration with a power of 400W, the oxidation reaction was carried out at 70°C for 8 hours. After the reaction was completed, it was repeatedly rinsed with water and ethanol, filtered with suction, and dried at 45°C to obtain bagasse-based Mannich base lignin-bis Aldehyde fibers;

[0063] (3) Mix the corncob-based Mannich base lignin-dialdehyde fiber with 20wt% polyethyleneimine aqueous solution with a molecular weight of 70,000g / mo...

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Abstract

The invention discloses a plant fiber based solid amine adsorption material, a preparation method and application thereof. The adsorption material has a structural formula shown as the specification, wherein R is remaining group of lignin, and R1 is (CH2CH2NH)n, and n=1, 2, 3, 4, 5. The adsorption material takes plant fiber containing lignin and cellulose as the matrix, a classification modification method is employed, and an amine compound with a small molecular weight (less than 250g / mol) and a polyethylenimine polymer with a large molecular weight (greater than or equal to 1800g / mol) are respectively introduced to plant fiber's lignin and cellulose, thus obtaining the adsorption material. The adsorption material has good antibacterial performance and adsorption trapping performance to acid gas, and can be regenerated by thermal desorption after adsorption of acid gas.

Description

technical field [0001] The invention belongs to the technical field of adsorption materials. More specifically, it relates to a plant fiber-based solid amine adsorption material and its preparation method and application. Background technique [0002] The greenhouse effect has become one of the most serious environmental problems faced by human beings. As the main component of greenhouse gases, CO 2 The concentration in the atmosphere is getting higher and higher, which also makes the CO 2 The emission reduction of CO has become the focus of research in this field, CO 2 Capture and storage (CCS) has become a hot topic in international research in recent years. as separation and enrichment of CO 2 One of the solid adsorbents, the solid amine adsorbent for CO 2 It has high selectivity and is not easily interfered by water or other gases, and can be used for CO in a relatively wide temperature range and pressure range 2 enrichment. The solid amine fiber based on plant ...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30B01D53/02C08H7/00C08G81/02C08B15/00
Inventor 陈水挟何辉李传发
Owner SUN YAT SEN UNIV
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