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Cellulose/tannin micro-nano fibers and preparation method thereof

A cellulose, micro-nano technology, applied in the field of materials, can solve the problems of adding process steps, complicated operations, long preparation routes, etc., and achieves the effects of simple process, reduced production cost, and mild reaction conditions.

Active Publication Date: 2016-05-04
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned preparation route is long and the operation is complicated, especially the spherical cellulose carrier needs to be prepared by dissolving and regenerating, which undoubtedly adds additional process steps

Method used

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  • Cellulose/tannin micro-nano fibers and preparation method thereof
  • Cellulose/tannin micro-nano fibers and preparation method thereof
  • Cellulose/tannin micro-nano fibers and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A cellulose / tannin micro-nano fiber is a product obtained by reacting a mixture of microfibrillated cellulose and tannin aqueous solution with an immobilizing agent (epichlorohydrin). The mass concentration of the tannin aqueous solution is 5wt%, the ratio of the microfibrillated cellulose to the tannin aqueous solution is 1:10 (g:ml), and the volume ratio of the immobilization reagent (epichlorohydrin) to the tannin aqueous solution is 1: 100. The aspect ratio of microfibrillated cellulose is: 1:200~1:600, and the diameter is 15~30nm.

[0024] Its preparation method comprises the following steps:

[0025] (1) Dissolving tannin in distilled water to obtain a tannin aqueous solution with a mass concentration of 5 wt %; the tannin is Vitex bark tannin.

[0026] (2) Add the microfibrillated cellulose into the tannin aqueous solution according to the proportion, and fully stir and disperse evenly to obtain the microfibrillated cellulose-tannin mixture; the microfibrillate...

Embodiment 2

[0030] A cellulose / tannin micro-nano fiber is a product obtained by reacting a mixture of microfibrillated cellulose and tannin aqueous solution with an immobilizing agent (50 wt % glutaraldehyde aqueous solution). The mass concentration of tannin aqueous solution is 15wt%, the ratio of microfibrillated cellulose to tannin aqueous solution is 1:20 (g:ml), the volume ratio of immobilization reagent (50wt% glutaraldehyde aqueous solution) to tannin aqueous solution It is 3:100. The aspect ratio of microfibrillated cellulose is: 1:200~1:600, and the diameter is 15~30nm.

[0031] Its preparation method comprises the following steps:

[0032] (1) Dissolving a certain amount of tannin in distilled water to obtain an aqueous solution of tannin; the tannin is quebracho tannin.

[0033] (2) Add the microfibrillated cellulose to the tannin aqueous solution according to the proportion, and fully stir and disperse evenly to obtain the microfibrillated cellulose-tannin mixture; the micro...

Embodiment 3

[0037] A cellulose / tannin micro-nano fiber is a product obtained by reacting a mixture of microfibrillated cellulose and tannin aqueous solution by adding an immobilizing agent (30wt% citric acid aqueous solution). The mass concentration of the tannin aqueous solution is 15wt%, the ratio of the microfibrillated cellulose to the tannin aqueous solution is 3:10 (g:ml), and the volume ratio of the immobilization reagent (30wt% citric acid aqueous solution) to the tannin aqueous solution is 5:100. The aspect ratio of microfibrillated cellulose is: 1:200~1:600, and the diameter is 15~30nm.

[0038] Its preparation method comprises the following steps:

[0039] (1) Dissolving a certain amount of tannin in distilled water to obtain an aqueous solution of tannin; the tannin is bayberry tannin.

[0040] (2) Adding the microfibrillated cellulose into the tannin aqueous solution according to the proportion, and fully stirring and dispersing evenly to obtain the microfibrillated cellulo...

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Abstract

The invention provides cellulose / tannin micro-nano fibers. The cellulose / tannin micro-nano fibers are products obtained after an immobilized reagent is added to mixed liquor of microfibrillated cellulose and a tannin water solution for a reaction. The immobilized reagent is aldehydes or acids or epoxy of polyfunctional groups. A preparation method of the cellulose / tannin micro-nano fibers includes the following steps that 1, tannin is dissolved in water to prepare the tannin water solution; 2, the microfibrillated cellulose is added to the tannin water solution to prepare the microfibrillated cellulose-tannin mixed liquor; 3, the immobilized reagent is added to the microfibrillated cellulose-tannin mixed liquor, and the cellulose / tannin micro-nano fibers are obtained after the reaction. The microfibrillated cellulose serves as a fixed carrier of tannin, the raw materials are easy to obtain, and production cost is greatly reduced. The microfibrillated cellulose and tannin are both biomass resources and can be repeatedly used and naturally degraded, environment friendliness is achieved, and secondary pollution is not likely to be caused with the product serving as a wastewater treatment adsorbent. The whole preparation process is simple in step, mild in reaction condition, high in operability and beneficial for industrial popularization.

Description

technical field [0001] The invention belongs to the field of material technology, and in particular relates to a micro-nano fiber based on cellulose material and fixed with tannin, and also relates to a preparation method thereof. Background technique [0002] Tannin is a natural polyphenolic compound widely present in the bark and fruit of many trees (such as larch, wattle, etc.). The molecular structure of tannin is rich in ortho-phenolic hydroxyl groups, which can electrostatically combine and complex with heavy metal ions or cationic organic dyes to form a five-membered chelate ring, so it has a good water purification ability[ Sep. Purif. Technol. ,2006,47,113]. However, the extremely water-soluble nature of tannin limits its application as an excellent adsorbent material. Therefore, the work of immobilizing tannins has become a solution. Tannin immobilization is to combine tannin on silica, activated carbon[ J.Mol.Catal.A : Chem. ,2010,320,40], resin [ J. Haza...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F1/62
CPCB01J20/24B01J20/28023C02F1/286C02F2101/22C02F2101/38C02F2103/30
Inventor 裴莹陈月徐高强汤克勇郑学晶刘捷
Owner ZHENGZHOU UNIV
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