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A kind of preparation method and application of banana fiber chitosan composite hydrogel

A technology of composite hydrogel and banana fiber, which is applied in the directions of gel preparation, chemical instruments and methods, water pollutants, etc. Effect

Active Publication Date: 2018-05-11
HAIKOU EXPERIMENTAL STATION CHINESE ACAD OF TROPICAL AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the solubility of cellulose in most traditional organic solvents is very small, and it is difficult to carry out uniform cellulose modification reactions in them

Method used

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  • A kind of preparation method and application of banana fiber chitosan composite hydrogel
  • A kind of preparation method and application of banana fiber chitosan composite hydrogel

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Embodiment 1

[0025] A preparation method of banana fiber chitosan composite hydrogel, comprising the following steps:

[0026] S1. Purification of banana fiber: after cutting the banana fiber, pickling, secondary alkali boiling, and water washing are carried out to obtain banana cellulose;

[0027] Described pickling is by the sulfuric acid of 1.5g / L, soaks the cut banana fiber at 20 ℃ for 60min, and adds a small amount of penetrating agent JFC (fatty alcohol polyoxyethylene ether), and the banana fiber after pickling is rinsed with deionized water To neutrality; the first time alkali boiling condition of described secondary alkali boiling: in 8%NaOH, 2%Na 2 SiO 3 and 2% Na 2 SO 3 Scouring in the mixed solution for 180min; the second alkali boiling condition: in 2% NaOH, 2% Na 2 CO 3 and 2%H 2 o 2 Scouring in the mixed solution for 120 minutes; the specific operation of the water washing: first wash with distilled water, then wash with 1% dilute sulfuric acid, and finally wash with ...

Embodiment 2

[0034] A preparation method of banana fiber chitosan composite hydrogel, comprising the following steps:

[0035] S1. Purification of banana fiber: after cutting the banana fiber, pickling, secondary alkali boiling, and water washing are carried out to obtain banana cellulose;

[0036]The pickling is 5.0g / L acetic acid, soaking the cut banana fiber at 60°C for 20min, and adding a small amount of penetrant JFC, and washing the pickled banana fiber with deionized water to neutrality; The first alkali boiling condition of soda cooking: in 18% NaOH, 5% Na 2 SiO 3 and 3% Na 2 SO 3 Scouring in the mixed solution for 90 minutes; in the second alkali boiling conditions: 8% NaOH, 5% Na 2 CO 3 and 8%H 2 o 2 Scouring in the mixed solution for 60 minutes; the specific operation of the water washing: first wash with distilled water, then wash with 1% dilute sulfuric acid, and finally wash with distilled water until neutral;

[0037] S2. Banana cellulose dissolution: dissolve the ba...

Embodiment 3

[0043] A preparation method of banana fiber chitosan composite hydrogel, comprising the following steps:

[0044] S1. Purification of banana fiber: after cutting the banana fiber, pickling, secondary alkali boiling, and water washing are carried out to obtain banana cellulose;

[0045] The pickling is 3.0g / L acetic acid, soaking the cut banana fiber for 40min at 40°C, and adding a small amount of penetrant JFC, and washing the pickled banana fiber with deionized water to neutrality; Soda cooking conditions for the first time: in 13% NaOH, 4% Na 2 SiO 3 and 2% Na 2 SO 3 Scouring in the mixed solution for 135min; the second alkali boiling condition: in 5% NaOH, 4% Na 2 CO 3 and 6%H 2 o 2 Scouring in the mixed solution for 90 minutes; the specific operation of the water washing: first wash with distilled water, then wash with 1% dilute sulfuric acid, and finally wash with distilled water until neutral;

[0046] S2. Banana cellulose dissolution: dissolve the banana cellulo...

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Abstract

The invention discloses a preparation method and application of banana fiber chitosancomplex hydrogel. The preparation method comprises the following steps: firstly, after banana fibers are cut, performing acid pickling, secondary soda boiling and washing on the banana fibers, so as to obtainbanana cellulose; then, dissolving the banana cellulose into ionic liquid, so as to obtain banana cellulose solution; meanwhile, dissolving chitosan powder into polyacrylic acid solution, so as to obtain chitosan solution; adding thechitosan solution into the banana cellulose solution for mixing and dissolving and accelerating effective crosslinking with a crosslinking agent in temperature rise, so as to obtain banana fiber chitosancomplex hydrogel solution; finally, washing, so as to obtain the banana fiber chitosancomplex hydrogel. The banana fiber chitosancomplex hydrogel prepared by the invention is strong in adsorption capacity for heavy metal ions, high in adsorption speed and good in biological compatibility and can be applied to treatment of heavy metal pollution in the environment, so that the environment improvement efficiency is improved favorably, and the banana fibers are fully utilized, therefore, a win-win effect is realized.

Description

technical field [0001] The invention relates to the technical field of banana fiber, in particular to a preparation method and application of banana fiber chitosan composite hydrogel. Background technique [0002] As heavy metals are more and more widely used in human production and life, and can directly or indirectly enter the atmosphere, water, and soil, there are varying degrees of heavy metal pollution in the environment. Heavy metals are absorbed through various channels such as the human respiratory tract, digestive tract and skin. When these heavy metals accumulate in the human body to a certain extent, they will directly affect human health and even threaten life. Therefore, countries urgently need to control the pollution of heavy metals, reduce the harm to humans or other organisms, improve people's health and ecological balance. However, the adsorption efficiency of some existing methods for adsorbing heavy metal ions is relatively low, which is not conducive to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30B01J13/00C02F1/28C02F101/20
CPCB01J13/0065B01J20/24B01J20/28047B01J2220/4825C02F1/286C02F2101/20
Inventor 郑丽丽盛占武艾斌凌郑晓燕金志强
Owner HAIKOU EXPERIMENTAL STATION CHINESE ACAD OF TROPICAL AGRI SCI
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