Preparation method of modified cellulose adsorbents

A cellulose and adsorbent technology, which is applied in the field of preparation of modified cellulose adsorbents, can solve the problems of general adsorption performance of cellulose adsorbents, poor practicability of adsorbents, high requirements on reaction conditions, etc., and achieves simple and reliable action mechanism, The effect of stable performance and broad-spectrum adsorption capacity

Inactive Publication Date: 2014-01-01
SUZHOU UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the adsorption performance of the cellulose adsorbent prepared by this method is average, the practicability of the adsorbent is poor, and the reaction conditions are relatively high ("Environmental Prevention and Pollution", 2004, 26 (1): 57-59)

Method used

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  • Preparation method of modified cellulose adsorbents
  • Preparation method of modified cellulose adsorbents
  • Preparation method of modified cellulose adsorbents

Examples

Experimental program
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Effect test

Embodiment 1

[0038] The preparation method of modified cellulose adsorbent is characterized in that, comprising the following steps:

[0039] (1) Preparation of activated cotton fiber: control the ratio of the mass of cotton fiber to the volume of sodium hydroxide solution at 1:50, place 5 g of cotton fiber in a sodium hydroxide solution with a mass fraction of 10%, activate at 30°C for 1 hour, and filter. Then fully wash with deionized water and dry to obtain activated cotton fiber;

[0040](2) Preparation of epoxidized cotton fiber: Control the ratio of the mass of activated cotton fiber to the volume of deionized water to be 1:30, place the activated cotton fiber in deionized water to swell for 0.5h, and then add Sodium hydroxide solution 5mL, epichlorohydrin 10mL and phase transfer catalyst cetyltrimethylammonium bromide 1g were added to the above system, reacted at 40°C for 2h, then filtered and deionized water, anhydrous After fully washing with water and ethanol, drying is obtained...

Embodiment 2

[0051] (1) Preparation of activated fiber bamboo pulp: control the ratio of the mass of bamboo pulp fiber to the volume of sodium bicarbonate solution to 1:100, place 5g of bamboo pulp fiber in a 40% sodium bicarbonate solution solution, and activate at 80°C 8h, filter, then fully wash with deionized water and dry to obtain activated bamboo pulp fiber;

[0052] (2) Preparation of epoxidized bamboo pulp fiber: control the ratio of the mass of activated bamboo pulp fiber to the volume of deionized water to 1:20, place the activated bamboo pulp fiber in deionized water to swell for 8 hours, and then successively add the mass fraction to 10 % sodium bicarbonate solution 10mL, epichlorohydrin 15mL and phase transfer catalyst dodecyltrimethylammonium chloride 80g were added to the above system, reacted at 90°C for 20h, then filtered and deionized The epoxidized bamboo pulp fiber is obtained by fully washing with water and absolute ethanol and then drying;

[0053] (3) Preparation o...

Embodiment 3

[0058] (1) Preparation of activated hemp fiber: Control the ratio of the mass of hemp fiber to the volume of sodium hydroxide solution to be 1:20, place 5 g of hemp fiber in a sodium hydroxide solution with a mass fraction of 25%, activate at 60°C for 2 hours, filter, Then fully wash with deionized water and dry to obtain activated hemp fiber;

[0059] (2) Preparation of epoxidized hemp fiber: control the ratio of the mass of activated hemp fiber to the volume of deionized water to 1:20, place the activated hemp fiber in deionized water to swell for 1 hour, and add 40% sodium carbonate Add 10mL of solution, 10mL of epichlorohydrin and 0.05g of phase transfer catalyst benzyltriethylammonium chloride into the above system, react at 10°C for 2h, filter, wash fully with deionized water and absolute ethanol, and then dry it to prepare Epoxy hemp fiber;

[0060] (3) Preparation of epoxidized dialdehyde oxidized hemp fiber: control the ratio of the quality of epoxidized hemp fiber t...

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Abstract

The invention discloses a preparation method of modified cellulose adsorbents. The preparation method comprises the following steps: (1) activating cellulose in alkaline aqueous solution to obtain activated cellulose; (2) reacting the activated cellulose with epoxy chloropropane to obtain epoxy cellulose; (3) reacting the epoxy cellulose with an oxidizing agent to obtain epoxy dialdehyde oxidized cellulose; (4) reacting cyclodextrin with epoxy dialdehyde oxidized cellulose to obtain cyclodextrin grafted modified cellulose; and (5) reacting the cyclodextrin grafted modified cellulose with amino-terminated hyperbranched polymer to obtain the modified cellulose adsorbents. The raw material source is wide, the price is low, and the environment-friendly effect is achieved; the preparation method is simple, the reaction condition is mild, the equipment requirement is low and scale production is facilitated; and the prepared adsorbent has stable performance and broad-spectrum adsorption capacity for heavy metal ions, dyes and other organic matters and is environment-friendly, the cellulose additional value is remarkably promoted, and good economic and social benefits are achieved.

Description

technical field [0001] The invention relates to a preparation method of a cellulose adsorbent, in particular to a preparation method of a modified cellulose adsorbent, and belongs to the technical field of chemical material production methods. Background technique [0002] With the rapid development of society and economy, human demand for natural resources such as water has increased sharply. However, the waste generated by industry, agriculture and life is discharged directly without treatment, resulting in serious pollution of water bodies, which directly affects humans and animals. water safety. In order to deal with water pollution, a large number of water pollution adsorbents have also emerged as the times require. Traditional adsorbents such as activated carbon and ion exchange fibers are expensive and mostly in the form of granular or powder, which is inconvenient to use and regenerate. In order to overcome these shortcomings, people turned their attention to natura...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28
Inventor 陈宇岳闫腾岳新霞林红
Owner SUZHOU UNIV
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