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Preparation method of beta-cyclodextrin modified loofah sponge adsorbent

A loofah and cyclodextrin technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., to achieve good desorption performance, low energy consumption, and good stability

Inactive Publication Date: 2015-12-30
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no report on using β-cyclodextrin to modify loofah

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Organic treatment of loofah: In the reactor, add deionized water: 50mL, concentrated sulfuric acid: 11mL, stir well, cool to room temperature, add 30% hydrogen peroxide: 10mL, mix well, Then add pre-treated loofah: 20g, soak at room temperature for 11 hours, boil for 35 minutes, wash with deionized water until neutral after cooling, then soak in thionyl chloride for 2.5 hours at room temperature, filter with suction, and dry to obtain organic loofah;

[0026] (2) Preparation of γ-(2,3-epoxypropyl)propyltrimethoxysilane modified loofah: In the reactor, add ethanol: 76mL, γ-(2,3-epoxypropyl) Propyltrimethoxysilane: 19mL, organic loofah: 20g, react at a constant temperature of 55±2°C, stir, and reflux for 7h. After cooling, wash with ethanol, filter with suction, and dry in a vacuum oven to obtain γ-( 2,3-epoxypropyl) propyltrimethoxysilane modified loofah;

[0027] (3) Preparation of β-cyclodextrin modified loofah adsorbent: In the reactor, add dimethyl sulfoxide: 5...

Embodiment 2

[0029](1) Organic treatment of loofah: In the reactor, add deionized water: 45mL, concentrated sulfuric acid: 14mL, stir well, cool to room temperature, add 30% hydrogen peroxide: 12mL, mix well, Then add pre-treated loofah: 18g, soak at room temperature for 10 hours, boil for 30 minutes, wash with deionized water until neutral, then soak in thionyl chloride for 2 hours at room temperature, filter, and dry to obtain organic loofah network;

[0030] (2) Preparation of γ-(2,3-epoxypropyl)propyltrimethoxysilane modified loofah: In the reactor, add ethanol: 66mL, γ-(2,3-epoxypropyl) Propyltrimethoxysilane: 24mL, organic loofah: 23g, react at a constant temperature of 55±2°C, stir, and reflux for 6h. After cooling, wash with ethanol, filter with suction, and dry in a vacuum oven to obtain γ-( 2,3-epoxypropyl) propyltrimethoxysilane modified loofah;

[0031] (3) Preparation of β-cyclodextrin modified loofah adsorbent: In the reactor, add dimethyl sulfoxide: 45mL, β-cyclodextrin: 8...

Embodiment 3

[0033] (1) Organic treatment of loofah: In the reactor, add deionized water: 55mL, concentrated sulfuric acid: 12mL, stir well, cool to room temperature, add 30% hydrogen peroxide: 7mL, mix well, Then add pre-treated loofah: 16g, soak at room temperature for 12 hours, boil for 40 minutes, wash with deionized water until neutral, then soak in thionyl chloride for 3 hours at room temperature, filter, and dry to obtain organic loofah network;

[0034] (2) Preparation of γ-(2,3-epoxypropyl)propyltrimethoxysilane modified loofah: In the reactor, add ethanol: 82mL, γ-(2,3-epoxypropyl) Propyltrimethoxysilane: 14mL, organic loofah: 20g, react at a constant temperature of 55±2°C, stir, and reflux for 8 hours. After cooling, wash with ethanol, filter with suction, and dry in a vacuum oven to obtain γ-( 2,3-epoxypropyl) propyltrimethoxysilane modified loofah;

[0035] (3) Preparation of β-cyclodextrin modified loofah adsorbent: In the reactor, add dimethyl sulfoxide: 55mL, β-cyclodextr...

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Abstract

The invention discloses a preparation method of a beta-cyclodextrin modified loofah sponge adsorbent. The preparation method comprises the steps that 1, a loofah sponge is organically treated; 2, the organic loofah sponge is modified through gamma-(2,3-glycidyl) propyl group trimethoxy silane; 3, by mass, 52-65% of dimethyl sulfoxide, 8-15% of beta-cyclodextrin and 8-15% of hexamethylene diisocyanate are added in a reactor, the temperature is increased to 55+ / -2 DEGC and kept constant, stirring is carried out, a backflow reaction is carried out for 2-4 h, then 15-25% of the organic loofah sponge modified through the gamma-(2,3-glycidyl) propyl group trimethoxy silane is added, the sum of the percentages of all the components is 100%, the constant temperature is kept to be 65+ / -2 DEG C, stirring is carried out, the backflow reaction is carried out for 6-8 h, acetone backflow washing is carried out after the reaction is finished, the mixture is taken out to be placed in a vacuum drying box to be dried, and the beta-cyclodextrin modified loofah sponge adsorbent is obtained. The beta-cyclodextrin modified loofah sponge adsorbent has the high adsorption capacity for perfluoro caprylic acid, and is low in cost and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of a preparation method of a biosorbent, in particular to a preparation method of a β-cyclodextrin modified loofah adsorbent and an application technology for perfluorooctanoic acid (PFOA) adsorption. Background technique [0002] When entering the society, the problem of water pollution has attracted more and more attention. With the increasing problem of water pollution, the preparation of new materials with strong pertinence, good treatment effect and reusability has become the focus of research. Among them, a new adsorbent was synthesized with loofah as the backbone of the adsorbent and β-cyclodextrin as the active group to adsorb PFOA. [0003] Perfluorooctanoic acid (PFOA), or "C8", is a synthetic chemical often used as an integral processing aid in the production of high-performance fluoropolymers. These high-performance fluoropolymers can be widely used in aerospace technology, transportation, elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/58
Inventor 李慧芝许崇娟庄海燕
Owner UNIV OF JINAN
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