Superhydrophilic surface body, fabricating method thereof, and filter for oil and water separation

Patent metadata

Field	Value
Publication number	US-9884775-B2
Application number	US-201615387467-A
Country	US
Kind code	B2
Filing date	Dec 21, 2016
Priority date	Jan 4, 2016
Publication date	Feb 6, 2018
Grant date	Feb 6, 2018

Abstract

Disclosed are a superhydrophilic surface body, a fabricating method thereof, and a filter for oil and water separation, including a superhydrophilic surface. The method for fabricating a superhydrophilic surface body includes a first step of forming a polyaniline nanofiber layer on a surface of a base material, a second step of changing the polyaniline nanofiber layer into a completely oxidized pernigraniline base state, a third step of forming a self-assembled monomolecular film having a polymer polymerization initiation functional group on a surface of the polyaniline nanofiber layer, and a fourth step of forming a silica layer on a surface of the self-assembled monomolecular film. In the third step, the polyaniline nanofiber layer is reduced to a leucoemeraldine state.

First claim

What is claimed is:

1. A method for fabricating a superhydrophilic surface body, the method comprising:
a first step of forming a polyaniline nanofiber layer on a surface of a base material;
a second step of changing the polyaniline nanofiber layer into a completely oxidized pernigraniline base state;
a third step of forming a self-assembled monomolecular film having a polymer polymerization initiation functional group on a surface of the polyaniline nanofiber layer; and
a fourth step of forming a silica layer on a surface of the self-assembled monomolecular film.

2. The method of claim 1 , wherein:
in the first step, the base material is immersed into an aniline monomer solution, and the polyaniline nanofiber layer is formed in an emeraldine salt state at low temperature by oxidative polymerization.

3. The method of claim 2 , wherein:
the aniline monomer solution comprises at least one of ammonium persulfate, potassium persulfate, and sodium persulfate and at least one of perchloric acid, hydrochloric acid, camphor sulfonic acid, p-toluene sulfonic acid, and dodecylbenzenesulfonic acid.

4. The method of claim 1 , wherein:
prior to the first step, any one pre-treatment procedure of sand blasting, dry etching, wet etching, a plasma treatment, and a UV treatment is carried out on the base material.

5. The method of claim 1 , wherein:
in the second step, the polyaniline nanofiber layer is ultrasonically washed with deionized water, and then dried in an oven.

6. The method of claim 1 , wherein:
in the third step, the self-assembled monomolecular film comprises any one of 2-dimethylaminoethanethiol (DMAET) and 2-(dimethylamino)ethyl methacrylate (DMAEMA), and is formed by an immersion method.

7. The method of claim 6 , wherein:
in the third step, the polyaniline nanofiber layer is reduced to a leucoemeraldine state.

8. The method of claim 6 , wherein:
in the fourth step, the silica layer is formed by a method of immersing the base material subjected to the third step into a monosilicic acid solution.

Assignees

• Postech Acad Ind Found

Inventors

• Hwang Woon Bong
• CHO Handong

Classifications

• B01D17/10

  with stationary filtering elements · CPC title

• C02F1/40 Primary

  Devices for separating or removing fatty or oily substances or similar floating material (cleaning or keeping clear the surface of open water from oil or like materials E02B15/04; devices in sewers for separating liquid or solid substances from sewage E03F5/14, e.g. for use in drains leading to the sewer E03F5/16) · CPC title

• B01D17/02

  Separation of non-miscible liquids · CPC title

• D06M14/10

  of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• D06M13/325

  Amines · CPC title