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Method for preparing hydrophobic cellulosic organic nano clay composite heavy-metal ion adsorbing ceramsites

A technology of heavy metal ions and nanoclay, applied in chemical instruments and methods, adsorption of water/sewage treatment, water pollutants, etc., can solve the problems of non-biodegradable and environmental pollution, and achieve environmental friendliness, good adsorption effect, and good hydrophobicity effect of effect

Inactive Publication Date: 2016-05-11
梅庆波
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention: Aiming at the problem that a large amount of solvent needs to be used in the process of preparing polymer clay composite materials by solution intercalation, which brings great pollution to the environment and is not biodegradable, a hydrophobic fiber is provided The preparation method of plain organic nano-clay composite heavy metal ion adsorption ceramsite, the present invention first carries out organic treatment to sodium-based montmorillonite to obtain organic montmorillonite, so that the direction of montmorillonite changes from hydrophilic to hydrophobic, and then through the surface The sol-gel method is used to deposit titanium dioxide film on the surface of cellulose acetate membrane, beat the pulp and then pass octadecyltrimethoxysilane toluene solution to obtain hydrophobic composite cellulose acetate membrane slurry, and put it into high-speed emulsified homogeneous slurry with organic montmorillonite Intercalation reaction in the machine, and finally granulation and calcination. The composite material prepared by the present invention has a good hydrophobic effect and a good adsorption effect on heavy metal ions. The recovery of heavy metal ions can be realized by the calcination method, and in the preparation There is no waste gas and waste liquid discharge during the process, and the product is biodegradable and environmentally friendly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] First, weigh 400g of sodium-based montmorillonite and pour it into a 10L three-necked flask with a stirrer and a dropping funnel. Stir at a speed of 1 min. During the stirring process, drop 400 mL of an intercalation agent solution with a mass concentration of 20% into the flask with a dropping funnel; after the addition of the intercalation agent is completed, increase the stirring speed to 700 r / min, and continue stirring for 15 min. Then transfer to an oil bath, keep warm at 90°C for 2 hours, let it settle overnight and separate and remove the supernatant to obtain a precipitate, then put the precipitate in an oven and dry it at 105°C for 1 hour, grind it into powder and obtain a layer Organomontmorillonite with expanded spacing, set aside; take a piece of cellulose acetate film with a diameter of 5 cm, spread it in the Buchner funnel, and then add 400 mL of tetrabutyl titanate ethanol solution with a mass concentration of 40% to the funnel Submerge the cellulose ace...

example 2

[0025] First, weigh 450g of sodium-based montmorillonite and pour it into a 10L three-neck flask with a stirrer and a dropping funnel, add 4L of distilled water to the flask, transfer it to a water bath and heat it up to 60°C, start the stirrer at 350r / h Stir at a speed of 1 min. During the stirring process, add 450 mL of an intercalation agent solution with a mass concentration of 20% to the flask dropwise with a dropping funnel; after the addition of the intercalation agent is completed, increase the stirring speed to 750 r / min, and continue stirring for 17 min. Then transfer to an oil bath, keep warm at 93°C for 2.5 hours, let it settle overnight and separate and remove the supernatant to obtain the precipitate, then put the precipitate in an oven to dry at 108°C for 1.5 hours, and grind it into powder Obtain the organic montmorillonite with expanded layer spacing, and set aside; take a piece of cellulose acetate film with a diameter of 6 cm, spread it in the Buchner funnel,...

example 3

[0029] First, weigh 500g of sodium-based montmorillonite and pour it into a 10L three-neck flask with a stirrer and a dropping funnel, add 5L of distilled water to the flask, transfer it to a water bath and heat it up to 65°C, start the stirrer at 400r / Stir at a speed of 1 min. During the stirring process, use a dropping funnel to drop 500 mL of an intercalation agent solution with a mass concentration of 20% into the flask; after the addition of the intercalation agent is completed, increase the stirring speed to 800 r / min, and continue stirring for 20 min. Then transfer to an oil bath, keep warm at 95°C for 3 hours, let it settle overnight and separate and remove the supernatant to obtain a precipitate, then put the precipitate in an oven and dry it at 110°C for 2 hours, grind it into powder and obtain a layer Organomontmorillonite with enlarged spacing, set aside; take a piece of cellulose acetate film with a diameter of 8 cm, spread it in the Buchner funnel, and then add 5...

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Abstract

The invention discloses a method for preparing hydrophobic cellulosic organic nano clay composite heavy-metal ion adsorbing ceramsites and belongs to the field of composite materials. The method comprises the steps of firstly carrying out organizing treatment on sodium-based montmorillonite so as to obtain organic montmorillonite and change hydrophilic montmorillonite into hydrophobic montmorillonite, then, depositing a titanium dioxide film on the surface of a cellulose acetate film by a surface sol-gel method, carrying out pulping, then, preparing hydrophobic composite cellulose acetate film pulp by using an octadecyl trimethoxy silane toluene solution, loading the hydrophobic composite cellulose acetate film pulp and the organic montmorillonite to a high-speed emulsifying homogenizer together for intercalation, and finally, carrying out granulating and calcining, thereby obtaining the ceramsites. The material prepared by the method has a superficial hydrophobic effect and has good adsorption to heavy-metal ions, the heavy-metal ions can be recovered by a calcining method, no waste gas and waste liquid is discharged during preparation, and the product is biodegradable and environment-friendly.

Description

technical field [0001] The invention discloses a method for preparing hydrophobic cellulose organic nano-clay composite heavy metal ion adsorption ceramsite, which belongs to the field of composite materials. Background technique [0002] Biopolymer composites are well known for their applications in different fields. Nowadays, the problem of heavy metal pollution is becoming more and more serious. In order to solve this problem, it is necessary to find effective biodegradable and low-cost adsorbent materials. For heavy metal adsorption, solid-phase extraction is an effective method. Cellulose clay composites can be used as adsorbents for heavy metal ions, and the hydroxyl groups in cellulose macromolecules play an important role in the adsorption of heavy metal ions. [0003] The clay used in clay nanocomposites can be layered minerals such as bentonite, kaolin, talc, and mica modified by organic matter, but layered silicate clay minerals, that is, bentonite containing mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/20
CPCB01J20/12B01J20/26B01J2220/46C02F1/285C02F2101/20
Inventor 梅庆波王志慧林大伟
Owner 梅庆波
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