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Preparation method and application of multifunctional chitosan composite sponge

A technology of composite sponge and chitosan, applied in the directions of botanical equipment and methods, applications, separation methods, etc., can solve the problem of no sterilization effect, and achieve the effects of low cost, convenient secondary recovery and high sterilization rate

Inactive Publication Date: 2018-01-05
HARBIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the addition of glutaraldehyde, the prepared composite sponge has lipophilic and hydrophobic properties, while graphene itself does not contain oxygen-containing functional groups, so it does not have a bactericidal effect, but only has the function of oil-water separation

Method used

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  • Preparation method and application of multifunctional chitosan composite sponge
  • Preparation method and application of multifunctional chitosan composite sponge
  • Preparation method and application of multifunctional chitosan composite sponge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: In this embodiment, the GO-CS composite sponge is prepared according to the following steps:

[0033] In the first step, GO nanosheets were prepared by the Hummer method,

[0034] a. The synthesis stage of graphite oxide:

[0035] First, 50ml of concentrated sulfuric acid and 25ml of concentrated nitric acid were added to a round bottom flask, and magnetically stirred for 20 minutes under an ice bath. Then slowly add 4g of natural flake graphite and stir vigorously to avoid graphite agglomeration. After it is uniformly dispersed, slowly add 44g of potassium chlorate (speed control is added within one hour). Finally, the ice bath was removed, and the reaction was allowed to react at room temperature for 96 hours. Because this reaction will produce a large amount of chlorine, use sodium hydroxide solution to absorb the chlorine produced by the reaction. After 96 hours, the natural flake graphite was oxidized to graphite oxide.

[0036] b. Mechanical stripp...

Embodiment 2

[0045] Example 2: In this embodiment, the GO-CS composite sponge is prepared according to the following steps:

[0046] Step 1: Prepare GO nanosheets by the Hummer method,

[0047] a. The synthesis stage of graphite oxide:

[0048] First, 50ml of concentrated sulfuric acid and 25ml of concentrated nitric acid were added to a round bottom flask, and magnetically stirred for 20 minutes under an ice bath. Then slowly add 4g of natural flake graphite and stir vigorously to avoid graphite agglomeration. After it is uniformly dispersed, slowly add 44g of potassium chlorate (speed control is added within one hour). Finally, the ice bath was removed, and the reaction was allowed to react at room temperature for 96 hours. Because this reaction will produce a large amount of chlorine, use sodium hydroxide solution to absorb the chlorine produced by the reaction. After 96 hours, the natural flake graphite was oxidized to graphite oxide.

[0049] b. Mechanical stripping stage:

[00...

Embodiment 3

[0058] Example 3: In this embodiment, the GO-CS composite sponge is prepared according to the following steps:

[0059] Step 1: Prepare GO nanosheets by the Hummer method,

[0060] a. The synthesis stage of graphite oxide:

[0061] First, 50ml of concentrated sulfuric acid and 25ml of concentrated nitric acid were added to a round bottom flask, and magnetically stirred for 20 minutes under an ice bath. Then slowly add 4g of natural flake graphite and stir vigorously to avoid graphite agglomeration. After it is uniformly dispersed, slowly add 44g of potassium chlorate (speed control is added within one hour). Finally, the ice bath was removed, and the reaction was allowed to react at room temperature for 96 hours. Because this reaction will produce a large amount of chlorine, use sodium hydroxide solution to absorb the chlorine produced by the reaction. After 96 hours, the natural flake graphite was oxidized to graphite oxide.

[0062] b. Mechanical stripping stage:

[00...

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Abstract

The invention discloses a preparation method and application of multifunctional chitosan composite sponge and relates to a preparation method and application of multifunctional oil-water separation sponge with effects of sterilization and separation of oil and water. Underwater super-hydrophobic CS-GO can be used to prepare underoil super-hydrophilic water absorption sponge with effects of sterilization and bioadhesion resistance. Chitosan is a bioenvironmental protection material, has good biocompatibility and biodegradability and is easy to recover again without causing any pollution. Chitosan and graphene oxide are compounded to form the composite sponge having a high specific surface area and the composite sponge is an efficient oil-water separation material having antibacterial activity and low toxicity. The preparation method can solve the problem of oil leakage pollution and bioadhesion in the oil-water separation process at present. The chitosan underoil super-hydrophilic sponge prepared by an ice template method has pore sizes of 20 to 300 microns, an adsorption capacity of 50 to 200g / g and separation efficiency of 99.5% or more in a test.

Description

technical field [0001] The invention relates to a preparation method and application of a multifunctional chitosan composite sponge. Background technique [0002] With the frequent occurrence of offshore oil spills and the continuous discharge of industrial oily wastewater, water pollution has seriously threatened the ecosystem, and oil-water separation has become a global problem that needs to be solved urgently. At present, in response to this demand, many oil-water separation materials have been developed, and they have shown excellent oil-water separation properties. In 2004, Jiang Lei and others proposed the concept of gravity-driven oil-water separation materials, and the initial oil-water separation mesh was prepared, and then a lot of research was devoted to the development of this kind of oil-water separation materials. However, the existing oil-water separation materials only have the function of oil-water separation, and there are a large number of harmful bacter...

Claims

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Application Information

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IPC IPC(8): C08L5/08C08K3/04C08J9/28C08J9/40B01J20/28B01J20/24B01J20/30C02F1/28C02F1/40B01D17/022A01N59/00A01N25/10A01P1/00
Inventor 宫显云姜艳丽田玫
Owner HARBIN UNIV
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