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Preparation method of hydrophobic/lipophilic polyurethane sponge

A technology of polyurethane sponge and lipophilicity, which can be used in chemical instruments and methods, coatings, and other chemical processes, and can solve the problems that graphene materials have not been reported.

Active Publication Date: 2015-05-06
SHANGHAI UNIV
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Problems solved by technology

However, studies involving graphene materials with both superhydrophobic and superoil-absorbing properties have not been reported so far

Method used

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  • Preparation method of hydrophobic/lipophilic polyurethane sponge

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Embodiment Construction

[0016] 1. Material preparation

[0017] (1) Preparation of reagents

[0018] The main reagents are: concentrated sulfuric acid (H 2 SO 4 ), concentrated nitric acid (HNO 3 ), ammonia (NH 4 OH), absolute ethanol (CH 3 CH 2 OH), acetone (C 3 h 6 O)

[0019] (2) Test matrix material

[0020] Polyurethane sponge, purchased at the manufacturer.

[0021] (3) Experimental instruments and equipment

[0022] Constant temperature magnetic stirrer, filter bottle, vacuum filter pump, 0.22μm PTFE membrane, oven, vacuum drying oven, ultrasonic cleaning machine, muffle furnace

[0023] 2. The specific process of preparing hydrophobic and lipophilic polyurethane sponge is:

[0024] a. At room temperature, soak 60~80 mesh flake graphite in the sulfuric acid / nitric acid mixture with a volume ratio of 3:2 for 10~15min, wherein the weight volume ratio of flake graphite to the mixture is 1g: (5~6 ) ml to obtain a graphite intercalation compound, which is washed with distilled water un...

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Abstract

The invention relates to a preparation method of a hydrophobic / lipophilic polyurethane sponge, which comprises the following steps: preparing expanded graphite from crystalline flake graphite; refluxing the expanded graphite in concentrated nitric acid for 36 hours, and performing ultrasonic treatment in a mixed solution of ammonia water and ethanol for 3 hours; and finally, performing ultrasonic treatment on the obtained substance in an ethanol solution for 90 minutes, thus obtaining a few-layer graphene nanosheet. The hydrophobic / lipophilic effect of the sponge is determined by soaking the polyurethane sponge ultrasonically cleaned with acetone and deionized water in the graphene ethanol solution and coating, the water absorbency and the oil absorbency of the sponge are respectively 0.04-43, and the sponge has very excellent hydrophobic effect (lower-right corner of the drawing) and lipophilic effect (upper-left corner of the drawing). According to the invention, the ultra-hydrophobic sponge surface is constructed by using the special morphology of the graphene, so that the sponge has favorable oil absorption capability, which has favorable practical application value in petroleum polluted water body remediation.

Description

technical field [0001] The invention relates to a preparation method of hydrophobic and lipophilic polyurethane sponge. Background technique [0002] Recently, solid surfaces with superhydrophobic (water contact angle >150°) and superoleophilic (oil contact angle <5°) have attracted much attention due to their ability to selectively adsorb oils or organic solvents without absorbing water at all. Keep an eye on and research interests. Based on this, many efficient adsorption materials have been extensively studied, including inorganic nanowire films, microporous polymers, carbon nanotubes, etc. However, these materials are costly and complicated to produce, making it difficult to mass-produce them for practical applications. In addition, more research has recently turned its attention to finding solutions to the severe water pollution problems worldwide due to oil spills and chemical spills. Therefore, it is imperative to find new materials with high adsorption perfo...

Claims

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Application Information

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IPC IPC(8): C08J7/06C08J7/00C08L75/04C08K9/02C08K9/00C08K3/04C09K3/32
Inventor 刘晓艳李辈辈张新颖魏静顾婷柴文波邹君臣李红兵王倩
Owner SHANGHAI UNIV
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