Preparation method of intelligent pH response type melamine foam oil-water separation material

A technology for melamine and oil-water separation, which is applied in separation methods, liquid separation, chemical instruments and methods, etc., and can solve problems such as complex pH-responsive foam preparation processes

Inactive Publication Date: 2020-04-17
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is to overcome the disadvantages of complex pH response foam preparation process, change the original three-step ATRP grafting method into two steps, and directly induce free radicals in aqueous solution through a simple copper amine redox reaction Grafting polymerization method, directly grafting polydiethylaminoethyl methacrylate in aqueous solution to construct intelligent pH-responsive melamine foam oil-water separation material

Method used

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  • Preparation method of intelligent pH response type melamine foam oil-water separation material
  • Preparation method of intelligent pH response type melamine foam oil-water separation material
  • Preparation method of intelligent pH response type melamine foam oil-water separation material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Make the volume 1.5×1.5×2cm 3 The melamine foam was put into 0.16 g of 3-aminopropyltrimethoxysilane dissolved in 32 g of toluene solution and soaked under reflux at 110° C. for 1 hour for silanization modification. After taking it out, it was dried in an oven at 60° C. to constant weight.

[0022] (2) 0.2 g of diethylaminoethyl methacrylate and 0.1 g of copper sulfate were dissolved in 40 g of deionized water to prepare a mixed solution. Add the foam obtained in step (1) into the mixed solution, react at 80°C for 2 hours, take it out, wash it with deionized water and ethanol three times, and then dry it in an oven at 60°C to constant weight to obtain pH-responsive melamine Foam oil-water separation material.

[0023] The obtained oil-water separation materials were characterized. figure 1 It can be seen that compared to the unmodified melamine foam, the modified melamine foam obtained in Example 1 is at 1730cm -1 The stretching vibration peak of the carbonyl gro...

Embodiment 2

[0027] (1) Make the volume 1.5×1.5×2cm 3 Put the melamine foam into 32 g of toluene solution dissolved with 0.4 g of 3-aminopropyltrimethoxysilane and soak it under reflux at 115° C. for 3 hours for silanization modification. After taking it out, dry it in an oven at 60° C. to constant weight.

[0028] (2) 0.4 g of diethylaminoethyl methacrylate and 0.2 g of copper sulfate were dissolved in 40 g of deionized water to prepare a mixed solution. Add the foam obtained in step (1) into the mixed solution, react at 70°C for 2 hours, take it out, wash it with deionized water and ethanol three times, and then dry it in an oven at 60°C to constant weight to obtain pH-responsive melamine Foam oil-water separation material.

[0029] Test the water contact angle of the foam. When using water with pH=2, the contact angle is 0°; when using water with pH=7, the contact angle is 132°; when using water with pH=9, the contact angle is 134° Spend. Prove that the foam is hydrophilic under acid...

Embodiment 3

[0031] (1) Make the volume 1.5×1.5×2cm 3 The melamine foam was put into 0.6 g of 3-aminopropyltrimethoxysilane dissolved in 32 g of toluene solution and soaked under reflux at 115° C. for 5 hours for silanization modification. After taking it out, it was dried in an oven at 60° C. to constant weight.

[0032] (2) 0.6 g of diethylaminoethyl methacrylate and 0.4 g of copper sulfate were dissolved in 40 g of deionized water to prepare a mixed solution. Add the foam obtained in step (1) into the mixed solution, react at 70°C for 6 hours, take it out, wash it with deionized water and ethanol three times, and then dry it in an oven at 60°C to constant weight to obtain pH-responsive melamine Foam oil-water separation material.

[0033] Test the water contact angle of the foam. When using water with pH=2, the contact angle is 0°; when using water with pH=7, the contact angle is 140°; when using water with pH=9, the contact angle is 142° Spend. Prove that the foam is hydrophilic und...

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Abstract

The invention belongs to the technical field of oil absorption materials and environmental protection, and particularly relates to a preparation method of an intelligent pH response type melamine foamoil-water separation material. The preparation method comprises the following steps: firstly, carrying out silanization modification on melamine foam by adopting aminopropyltrimethoxysilane; and withcopper sulfate as a catalyst, carrying out a copper amine oxidation-reduction reaction in an aqueous solution to generate free radicals which initiate graft polymerization of diethylaminoethyl methacrylate so as to prepare the pH-responsive melamine foam oil-water separation material. According to the invention, the melamine foam with high internal porosity and large absorption capacity is selected as a matrix, and free radical graft polymerization is initiated through a simple copper-ammonium oxidation-reduction two-step method to prepare the oil-water separation foam material containing a pH response layer; the material has switchable wettability in different pH environments; and foam modification process is simple, and industrial production is easy to realize.

Description

technical field [0001] The invention belongs to the technical field of oil-absorbing materials and environmental protection, and relates to a preparation method of an intelligent pH-responsive melamine foam oil-water separation material. Background technique [0002] Because of oil spills caused by accidents, the discharge of industrial oily wastewater and domestic oily wastewater pollutes the clean water system, the society urgently needs technology to effectively separate oily wastewater to solve this global environmental pollution problem. Traditional methods for removing oil pollution include in-situ combustion, chemical dispersion, oil skimming, bioremediation, etc., but these technologies have disadvantages such as low efficiency, high operating costs, and even easy to cause secondary pollution. There are two types of emerging oil-water separation methods, namely filter materials (e.g., mesh, textile / non-woven fabrics, membranes, etc.) Compared with traditional method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D17/05
CPCB01D17/047
Inventor 任强朱俊戴天朱星星李坚汪称意
Owner CHANGZHOU UNIV
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