Method for preparing CMC/GO compound hydrogel microspheres by virtue of continuous method

A composite hydrogel, continuous process technology, applied in water/sewage treatment, chemical instruments and methods, adsorbed water/sewage treatment, etc. The effect of high quality, good swelling properties and good market application prospects

Inactive Publication Date: 2016-06-08
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nevertheless, this type of hydrogel also has the problem of single pollutant adsorption and difficulty in large-scale produ

Method used

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  • Method for preparing CMC/GO compound hydrogel microspheres by virtue of continuous method
  • Method for preparing CMC/GO compound hydrogel microspheres by virtue of continuous method
  • Method for preparing CMC/GO compound hydrogel microspheres by virtue of continuous method

Examples

Experimental program
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Effect test

Embodiment 1

[0037] This embodiment first prepares CMC / GO composite hydrogel microspheres according to the following steps:

[0038] (1) Preparation of CMC / GO / CA mixed solution

[0039] The graphite oxide prepared by the Hummers method is ultrasonically exfoliated and dispersed in deionized water, and then a certain amount of CMC and CA are dissolved in water respectively, and a mixture of CMC / GO / CA is obtained by solution blending, wherein the content of graphene oxide is 8wt%;

[0040] (2) Preparation of CMC / GO composite hydrogel microspheres by spray drying

[0041] Set the appropriate inlet temperature, injection volume, and air flow rate, and prepare CMC / GO composite hydrogel microspheres through the spray dryer. During the spray drying process, due to the high temperature, the -OH on the crosslinking agent CA and the CMC on the CMC The -COOH undergoes an esterification reaction;

[0042] figure 1 Infrared (FT-IR) spectra before and after crosslinking of CMC / GO composite hydrogel ...

Embodiment 2

[0046] This Example 2 prepares CMC / GO composite hydrogel microspheres in the same manner as in Example 1, the difference is only the 2wt% of graphene oxide in step 1.

[0047] After testing, the CMC / GO composite hydrogel microspheres obtained in this example have no effect on the metal ion Cu 2+ 、Cr 6+ 、Cd 2+ , Pb 2+ The adsorption amounts of the organic dyes MB and EosinY were 38mg / g, 45mg / g, 41mg / g, and 37mg / g, respectively.

Embodiment 3

[0049] The present embodiment 3 prepares CMC composite hydrogel microspheres in the same manner as in embodiment 1, the difference is only the 4wt% of graphene oxide in step 1.

[0050] After testing, the CMC / GO composite hydrogel microspheres obtained in this example have no effect on the metal ion Cu 2+ 、Cr 6+ 、Cd 2+ , Pb 2+ The adsorption capacity of each is 59mg / g, 76mg / g, 59mg / g and 49mg / g. The adsorption amounts of organic dyes MB and EosinY were 39mg / g and 41mg / g, respectively.

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Abstract

The invention discloses a method for continuously preparing sodium carboxymethylcellulose (CMC)/graphene oxide (GO) compound hydrogel microspheres with pollutant adsorption and drug sustained release functions. According to the method, a certain proportion of CMC, GO and citric acid (CA, a crosslinking agent) are dispersed into deionized water by virtue of solution blending, and CMC/GO compound microspheres are prepared by virtue of a spray drying method. The prepared compound microspheres have good swelling property and are capable of adsorbing organic dyestuffs and heavy metal ions in industrial wastewater, and the maximum adsorbing capacities are respectively 66mg/g(Eosin Y) and 120mg/g(Cr<6+>). Meanwhile, the compound microspheres can be used as a sustained release drug carrier. The CMC/GO compound hydrogel microspheres are prepared by virtue of spray drying, so that the process is simple; the method is applicable to large-scale industrial production and has good market application prospect in aspects of wide spectrum type adsorbents and sustained release drug carriers.

Description

technical field [0001] The invention relates to the fields of sewage treatment and drug sustained release, in particular to a preparation method of CMC / GO composite hydrogel microspheres capable of adsorbing organic dyes and heavy metal ions. Background technique [0002] In recent years, the rapid development of the petrochemical industry has produced a large amount of industrial wastewater, which contains a large amount of acids, alkalis, salts, organic solvents, toxic dyes and heavy metal ions, etc., posing a huge threat to the ecological environment and human health. In order to solve the above problems, researchers have turned their attention to natural polymer materials because they have good biocompatibility and no toxic side effects, and more importantly, they are renewable resources. Today, as petrochemical resources are increasingly depleted and environmental pollution is becoming more and more serious, the advantages of natural polymer materials in water treatment...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/28C02F1/28C02F101/30C02F101/20
CPCB01J20/20B01J20/223B01J20/28047C02F1/281C02F1/285C02F1/288C02F2101/20C02F2101/308
Inventor 魏宏亮刘静静楚晖娟何娟朱靖
Owner HENAN UNIVERSITY OF TECHNOLOGY
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