Bionic fiber functional material as well as preparation method and application thereof

A functional material and fiber technology, which is applied in the field of biomimetic fiber functional materials and its preparation, can solve the problems of difficult simultaneous removal of anionic and cationic heavy metal ions, low functional group density, and unbalanced functional group density. The effect of increasing the resistance of diffusion and mass transfer

Active Publication Date: 2021-06-04
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many anion and cation heavy metal ions in most water bodies at the same time. However, the preparation process of the current multi-adsorption site cellulose-based adsorption materials is generally complicated and the reaction efficiency is low. The multi-adsorption site cellulose-based adsorption materials have The density of the functional groups of the catalyst is generally not high, and the density of each functional group is unbalanced, so it is difficult to achieve rapid and simultaneous removal of various anion and cation heavy metal ions at low concentrations

Method used

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  • Bionic fiber functional material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] ①Preparation of carboxylated nanocellulose: Weigh 3g of dry bagasse pulp fiber in a 500mL three-neck flask, add 300mL of distilled water, and then add NaBr with a mole fraction of 5mmol / g dry bagasse pulp fiber to the bagasse pulp fiber mixture in turn. and TEMPO whose mole fraction is 0.5mmol / g absolute dry bagasse pulp fiber, then dropwise add a mass fraction of 10% NaOH solution to adjust the pH=10, and add an available chlorine mole fraction of 6mmol / g absolute dry bagasse pulp under the mixed liquid surface The NaClO solution of the fiber was fully mixed and reacted for 4 hours. During the reaction, the NaOH solution was continuously replenished to maintain the pH=10 until the pH no longer changed, and 10 mL of ethanol was added to terminate the reaction. The reaction product was taken out, the solution was centrifuged and washed until it was neutral, and no chloride ion was detected, and the product was stored at 4°C for future use.

[0033] ② Preparation of ethyl...

Embodiment 2

[0038] ①Preparation of carboxylated nanocellulose: Weigh 3g of dry bagasse pulp fiber in a 500mL three-necked flask, add 300mL of distilled water, and then add NaBr with a mole fraction of 3mmol / g dry bagasse pulp fiber to the bagasse pulp fiber mixture in turn. and TEMPO with a mole fraction of 0.3mmol / g absolute dry bagasse pulp fiber, then add dropwise a 20% NaOH solution to adjust the pH=10, and add an available chlorine mole fraction of 18mmol / g absolute dry bagasse pulp under the mixed liquid surface The NaClO solution of the fiber was thoroughly mixed and reacted for 6 hours. During the reaction, the NaOH solution was continuously replenished to maintain the pH=10 until the pH no longer changed, and 10 mL of ethanol was added to terminate the reaction. The reaction product was taken out, the solution was centrifuged and washed until it was neutral, and no chloride ion was detected, and the product was stored at 4°C for future use.

[0039] ② Preparation of ethylene thio...

Embodiment 3

[0044] ①Preparation of carboxylated nanocellulose: Weigh 3g of dry bamboo pulp fiber in a 500mL three-neck flask, add 300mL of distilled water, and then add NaBr with a mole fraction of 1mmol / g of dry bamboo pulp fiber to the bamboo pulp fiber mixture. And mole fraction is 0.1mmol / g the TEMPO of absolute dry bamboo pulp fiber, then dropwise add the NaOH solution that mass fraction is 30% to adjust pH=10, add available chlorine mole fraction under the mixed liquid surface and be 30mmol / g absolute dry bamboo pulp The NaClO solution of the fiber was fully mixed and reacted for 8 hours. During the reaction, the NaOH solution was continuously replenished to maintain the pH=10 until the pH no longer changed, and 10 mL of ethanol was added to terminate the reaction. The reaction product was taken out, the solution was centrifuged and washed until it was neutral, and no chloride ion was detected, and the product was stored at 4°C for future use.

[0045] ② Preparation of ethylene thio...

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Abstract

The invention provides a bionic fiber functional material as well as a preparation method and application thereof. The material is rich in multiple adsorption sites (N, O and S); the material is obtained by blending a polyethyleneimine polymer modified by three multifunctional groups, carboxylated nano-cellulose and graphene oxide, performing a coaxial spinning method based on an imitated spider spinning principle, and performing a post-crosslinking technology; the material is of a multi-layer structure with nanocellulose as a framework, graphene oxide as an outer layer and polyethyleneimine polymers modified by three multifunctional groups respectively as an inner layer; and all the layers are connected through chemical bonds. The N, O and S adsorption site densities of the material are all higher than 5 mmol / g.

Description

technical field [0001] The invention belongs to intelligent fiber functional materials, in particular to a bionic fiber functional material and its preparation method and application. Background technique [0002] Heavy metal ion pollution in water brings serious harm to human health and ecological system. In addition, these heavy metal ions often exist in water at the same time, so proper treatment of sewage before discharge is crucial. The main technologies used to reduce the metal content in industrial wastewater are membrane filtration, chemical precipitation, adsorption, ion exchange, electrolytic methods, reverse osmosis and solvent extraction. Among these techniques, adsorption is considered to be one of the most effective methods for removing heavy metal ions from aqueous solutions, and the performance of the adsorbent plays a key role. Cellulose-based adsorbents have attracted extensive attention due to their environmental protection, low cost, easy modification, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/02D01F8/16D01F1/10D01F11/08D01F11/02B01J20/26B01J20/28B01J20/30C02F1/28C02F101/20
CPCD01F8/02D01F8/16D01F1/10D01F11/08D01F11/02B01J20/262B01J20/24B01J20/20B01J20/28023C02F1/288C02F2101/20B01J20/3078B01J20/267B01J20/3007C02F1/285C02F1/286C08G83/006B01J2220/445C08J3/24C08J2351/02
Inventor 何辉王磊朱红祥周航王双飞
Owner GUANGXI UNIV
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