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Oil-repellent and water-absorbent palygorskite-double-network gel sponge as well as preparation method and application thereof

A palygorskite and double-network technology, applied in the field of palygorskite-double-network gel sponge, can solve the problems of high separation cost, poor separation effect, and high separation difficulty

Active Publication Date: 2021-11-26
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two methods all have the problems of high separation cost, high separation difficulty and poor separation effect.

Method used

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  • Oil-repellent and water-absorbent palygorskite-double-network gel sponge as well as preparation method and application thereof
  • Oil-repellent and water-absorbent palygorskite-double-network gel sponge as well as preparation method and application thereof
  • Oil-repellent and water-absorbent palygorskite-double-network gel sponge as well as preparation method and application thereof

Examples

Experimental program
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specific Embodiment approach

[0030] As a specific embodiment of the present invention, a method for preparing an oil-repellent and water-absorbing palygorskite-double network gel sponge specifically comprises the following steps:

[0031] Step 1: Use palygorskite rough stone as raw material, grind and sieve the rough stone, take a certain amount of palygorskite powder, disperse it in water, and purify it with sulfuric acid, then centrifuge the dispersion, and dry the centrifuged precipitate Obtain the palygorskite powder of purification afterward;

[0032] Preferably, the centrifugal speed is 3500rpm-5000rpm.

[0033] Step 2: dissolving a certain amount of polyallylamine hydrochloride in water to prepare a polyallylamine hydrochloride solution for subsequent use;

[0034] Preferably, the mass concentration of the polyallylamine hydrochloride solution is 2.5 mg / mL-5 mg / mL.

[0035] Step 3: Disperse the purified palygorskite powder obtained in step 1 in water, stir and sonicate until uniformly dispersed t...

Embodiment 1

[0047] A preparation method of palygorskite-double network gel sponge for oil repellency and water absorption, comprising the following steps:

[0048] Step 1: Use palygorskite raw stone as raw material, grind and sieve the raw stone, take a certain amount of palygorskite powder, disperse it in water, and purify it with sulfuric acid, then centrifuge the dispersion, and dry the centrifuged precipitate Obtain the palygorskite powder of purification afterward, and centrifugal rate is 3500rpm;

[0049] Step 2: Dissolving a certain amount of polyallylamine hydrochloride in water to prepare a polyallylamine hydrochloride solution for later use. The mass concentration of the polyallylamine hydrochloride solution is 2.5 mg / mL;

[0050] Step 3: Disperse the purified palygorskite powder obtained in step 1 in water, stir and sonicate until uniformly dispersed to obtain a palygorskite dispersion with a mass fraction of 3 wt%; the polyallylamine hydrochloride obtained in step 2 The salt ...

Embodiment 2

[0061] A preparation method of palygorskite-double network gel sponge for oil repellency and water absorption, comprising the following steps:

[0062] Step 1: Use palygorskite raw stone as raw material, grind and sieve the raw stone, take a certain amount of palygorskite powder, disperse it in water, and purify it with sulfuric acid, then centrifuge the dispersion, and dry the centrifuged precipitate Obtain the palygorskite powder of purification afterward, and centrifugal rate is 4000rpm;

[0063] Step 2: Dissolving a certain amount of polyallylamine hydrochloride in water to prepare a polyallylamine hydrochloride solution for later use. The mass concentration of the polyallylamine hydrochloride solution is 3 mg / mL;

[0064] Step 3: Disperse the purified palygorskite powder obtained in step 1 in water, stir and sonicate until uniformly dispersed to obtain a palygorskite dispersion with a mass fraction of 3 wt%; the polyallylamine hydrochloride obtained in step 2 The salt so...

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Abstract

The invention discloses oil-repellent and water-absorbent palygorskite-dual-network gel sponge and a preparation method and application thereof. The preparation method comprises the steps: mixing a polyallylamine hydrochloride solution and a palygorskite dispersion liquid, and performing centrifugal drying treatment to obtain polyallylamine modified palygorskite powder; uniformly dispersing the polyallylamine modified palygorskite powder in water to obtain a polyallylamine modified palygorskite dispersion liquid; mixing the polyacrylamide modified palygorskite dispersion liquid with a sodium perfluorooctanoate solution for reaction, and performing centrifugal drying treatment to obtain modified palygorskite powder; uniformly dispersing the modified palygorskite powder in water to obtain a modified palygorskite dispersion liquid; adding acrylamide and sodium alginate into the modified palygorskite dispersion liquid, dissolving, adding potassium persulfate and N,N'-methylene dilactam, dissolving, adding tetramethylethylenediamine, and stirring until the solution is converted into gel; and soaking the gel in a calcium chloride solution, and performing freeze drying treatment to obtain the palygorskite-double-network gel sponge. According to the sponge, purification treatment of oil substances can be realized.

Description

technical field [0001] The invention belongs to the technical field of oil-water separation, and in particular relates to an oil-repellent and water-absorbing palygorskite-double network gel sponge, a preparation method and application thereof. Background technique [0002] The presence of water in oils is often detrimental. For example, in production and life, edible oil will accelerate deterioration when it encounters water; in oil exploitation, the presence of water in oil will reduce the quality of oil; water in organic solvents may prevent chemical reactions from proceeding or reduce the purity of products. Therefore, it is extremely necessary to remove the moisture in oily substances to the greatest extent. [0003] There are two main forms of water in oil substances: physical blending and water-in-oil emulsion. When the water exists in the oil in the form of simple physical blending, the two can be separated by liquid separation first to achieve the purpose of coars...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08L33/26C08L5/04C08K9/04C08K7/26B01J20/12B01J20/28B01J20/30B01D17/022
CPCC08J9/286C08J9/0061C08J9/009B01J20/12B01J20/28047B01J20/28045B01D17/0202C08J2333/26C08J2405/04Y02A20/204
Inventor 梁军艳李新阳陈照宇赵凌儒和玲
Owner XI AN JIAOTONG UNIV
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