Patents by Inventor Woon Bong Hwang
Woon Bong Hwang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 10234202Abstract: Disclosed is a condensate water control dryer. The condensate water control dryer includes: a dryer main body which has a drying space formed therein; a first condensate water panel which is attached, in a first direction, to an inner wall surface of the drying space of the dryer main body and has a superhydrophilic surface; a second condensate water panel which is attached, in a second direction that intersects the first direction, to the inner wall surface of the drying space of the dryer main body and has a superhydrophobic surface; and attachment members which attach the first condensate water panel and the second condensate water panel to the inner wall surface of the dryer main body.Type: GrantFiled: July 7, 2015Date of Patent: March 19, 2019Assignees: POSTECH ACADEMY-INDUSTRY FOUNDATION, ADVANCED MANUFACTURE TECHNOLOGY CENTER, CHINA ACADEMY OF MACHINERY SCIENCE & TECHNOLOGYInventors: Woon Bong Hwang, Zhongde Shan, Shuangfeng Wu, Byung Rak Park, Won Shik Kwak
-
Patent number: 9884775Abstract: 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.Type: GrantFiled: December 21, 2016Date of Patent: February 6, 2018Assignee: POSTECH ACADEMY-INDUSTRY FOUNDATIONInventors: Woon Bong Hwang, Handong Cho
-
Patent number: 9862622Abstract: A filter structure capable of efficiently separating water and oil using wettability is provided. The filter structure according to an exemplary embodiment of the present invention includes a first filter layer including a plurality of openings, a second filter layer including a plurality of openings and positioned so as to be overlapped with the first filter layer at a distance from each other, and a hydrophobic polymer layer formed on surfaces of the first filter layer and the second filter layer. The first filter layer and the second filter layer include surfaces each having a dual-scale protrusion and depression structure as a combination of a micro-scale structure and a nano-scale structure, and the hydrophobic polymer layer is formed along curves of the protrusion and depression structure.Type: GrantFiled: June 27, 2013Date of Patent: January 9, 2018Assignee: POSTECH ACADEMY-INDUSTRY FOUNDATIONInventors: Woon Bong Hwang, Handong Jo, Dong Seob Kim, Yeong Ae Kim
-
Method for fabricating super-hydrophobic surface and evaporator having the super-hydrophobic surface
Patent number: 9839862Abstract: A method for fabricating a super-hydrophobic surface having excellent surface strength and an evaporator having the super-hydrophobic surface fabricated by the method are provided. The method includes preparing a metal base material, anodizing the metal base material to form a ceramic layer having a complex structure of a microstructure and nano-fiber structures on a surface of the metal base material, and applying a hydrophobic polymer material on the complex structure to form a polymer layer having the same surface shape as the complex structure.Type: GrantFiled: June 29, 2012Date of Patent: December 12, 2017Assignee: POSITECH ACADEMY-INDUSTRY FOUNDATIONInventors: Woon Bong Hwang, Sang Min Lee, Yeong Ae Kim -
Publication number: 20170190857Abstract: 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.Type: ApplicationFiled: December 21, 2016Publication date: July 6, 2017Inventors: Woon Bong HWANG, Handong CHO
-
Publication number: 20170146294Abstract: Disclosed is a condensate water control dryer. The condensate water control dryer includes: a dryer main body which has a drying space formed therein; a first condensate water panel which is attached, in a first direction, to an inner wall surface of the drying space of the dryer main body and has a superhydrophilic surface; a second condensate water panel which is attached, in a second direction that intersects the first direction, to the inner wall surface of the drying space of the dryer main body and has a superhydrophobic surface; and attachment members which attach the first condensate water panel and the second condensate water panel to the inner wall surface of the dryer main body.Type: ApplicationFiled: July 7, 2015Publication date: May 25, 2017Inventors: Woon Bong HWANG, Zhongde SHAN, Shuangfeng WU, Byung Rak PARK, Won Shik KWAK
-
Patent number: 9650262Abstract: A filter structure capable of efficiently separating water and oil using wettability is provided. The filter structure includes a first filter layer including a plurality of openings and a second filter layer including a plurality of openings and positioned so as to be overlapped with the first filter layer at a distance from each other. The first filter layer and the second filter layer include surfaces each having a dual-scale protrusion and depression structure as a combination of a micro-scale structure and a nano-scale structure, and thus have superhydrophilicity and selectively allow water from a water and oil mixture to pass therethrough.Type: GrantFiled: June 24, 2013Date of Patent: May 16, 2017Assignee: POSTECH ACADEMY-INDUSTRY FOUNDATIONInventors: Woon Bong Hwang, Handong Jo, Dong Seob Kim, Yeong Ae Kim
-
Patent number: 9219281Abstract: The present invention provides a separator for a fuel cell that improves efficiency of the fuel cell by removing water generated in a membrane-electrode assembly and accumulated in a channel of the separator, a manufacturing method thereof, and a fuel cell stack including the same. The separator for the fuel cell of the present invention includes: a main body of a plate shape; a channel concavely formed in at least one surface of the main body and supplying a fuel or oxygen to a membrane-electrode assembly; and a metal layer provided to a surface of the channel and including an oxide layer formed by an anodic oxidation treatment and minute grooves of a nano-scale formed in the oxide layer, thereby forming the surface of the channel to be super-hydrophilic.Type: GrantFiled: September 27, 2010Date of Patent: December 22, 2015Assignee: POSTECH ACADEMY-INDUSTRY FOUNDATIONInventors: Sangmin Lee, Woon Bong Hwang
-
Publication number: 20150284269Abstract: A filter structure capable of efficiently separating water and oil using wettability is provided. The filter structure according to an exemplary embodiment of the present invention includes a first filter layer including a plurality of openings, a second filter layer including a plurality of openings and positioned so as to be overlapped with the first filter layer at a distance from each other, and a hydrophobic polymer layer formed on surfaces of the first filter layer and the second filter layer. The first filter layer and the second filter layer include surfaces each having a dual-scale protrusion and depression structure as a combination of a micro-scale structure and a nano-scale structure, and the hydrophobic polymer layer is formed along curves of the protrusion and depression structure.Type: ApplicationFiled: June 27, 2013Publication date: October 8, 2015Inventors: Woon Bong Hwang, Handong Jo, Dong Seob Kim, Yeong Ae Kim
-
Publication number: 20150203370Abstract: A filter structure capable of efficiently separating water and oil using wettability is provided. The filter structure includes a first filter layer including a plurality of openings and a second filter layer including a plurality of openings and positioned so as to be overlapped with the first filter layer at a distance from each other. The first filter layer and the second filter layer include surfaces each having a dual-scale protrusion and depression structure as a combination of a micro-scale structure and a nano-scale structure, and thus have superhydrophilicity and selectively allow water from a water and oil mixture to pass therethrough.Type: ApplicationFiled: June 24, 2013Publication date: July 23, 2015Inventors: Woon Bong Hwang, Handong Jo, Dong Seob Kim, Yeong Ae Kim
-
Patent number: 8925569Abstract: Disclosed is a safety valve of a low-pressure gas pipe which can be installed in a large-scale pipeline through which waste gases generated in a large-scale factory such as a steel mill flow and can reduce maintenance/management costs. The safety valve of a low-pressure gas pipe installed in a waste gas pipeline to discharge condensate includes: a first pipeline connected to a bottom surface of the waste gas pipeline and having a waste gas outlet on an inner wall thereof at one side thereof; a second pipeline extending from the first pipeline to be bent and extending in a direction parallel to the first pipeline; and an opening/closing unit for opening or closing the waste gas outlet.Type: GrantFiled: November 3, 2010Date of Patent: January 6, 2015Assignee: Postech Academy—Industry FoundationInventors: Woon Bong Hwang, Jeong Hwa Seo, Wan Kyun Chung, Dong Seob Kim
-
Patent number: 8852448Abstract: A method for fabricating a 3D (three-dimensional) structure is disclosed to provide hydrophobicity to a surface of a 3D structure by using a dipping method in which a predetermined-shaped structure is immersed in a molten metal solution. The method includes: immersing a predetermined-shaped structure in a molten metal solution to coat a molten metal material on the surface of the predetermined-shaped structure; anodizing a metal base coated with the molten metal material; coating a polymer material on an outer surface of the metal-coated base to form a negative replica structure; covering an outer surface of the negative replica structure with an outer formation material; and removing the metal-coated base from the negative replica structure and the outer formation material.Type: GrantFiled: March 12, 2009Date of Patent: October 7, 2014Assignee: Postech Academy-Industry FoundationInventors: Dong-Seob Kim, Kun-Hong Lee, Woon-Bong Hwang, Geun-Bae Lim, Hyun-Chul Park, Byeong-Joo Lee, Sang-Min Lee, Joon-Won Kim
-
Publication number: 20140182790Abstract: A method for fabricating a super-hydrophobic surface having excellent surface strength and an evaporator having the super-hydrophobic surface fabricated by the method are provided. The method includes preparing a metal base material, anodizing the metal base material to form a ceramic layer having a complex structure of a microstructure and nano-fiber structures on a surface of the metal base material, and applying a hydrophobic polymer material on the complex structure to form a polymer layer having the same surface shape as the complex structure.Type: ApplicationFiled: June 29, 2012Publication date: July 3, 2014Applicant: POSTECH ACADEMY-INDUSTRY FOUNDATIONInventors: Woon Bong Hwang, Sang Min Lee, Yeong Ae Kim
-
Patent number: 8707999Abstract: The present invention relates to a method for manufacturing a solid body having a superhydrophobic surface structure formed by using a surface treatment of a metal body, a replication process, and a polymer sticking phenomenon to increase efficiency of fluid transfer and prevent foreign materials from being accumulated in the tube, and a superhydrophobic fluid transfer tube using the method. The superhydrophobic fluid transfer tube includes a fluid guider and a solid body provided on a fluid contact surface of the fluid guider and has micrometer-scaled unevenness and nanometer-scaled protrusions.Type: GrantFiled: September 19, 2007Date of Patent: April 29, 2014Assignee: Postech Academy-Industry FoundationInventors: Dong-Hyun Kim, Sang-Min Lee, Il-Sin Bae, Dong-Seob Kim, Duk-Hyun Choi, Chang-Woo Lee, Ji-Hoon Jeon, Seong-Ho Son, Tae-Chul Moon, Woon-Bong Hwang, Joon-Won Kim, Hyun-Chul Park, Kun-Hong Lee
-
Publication number: 20130139830Abstract: A mask and a method of manufacturing the same that intercept a virus are provided. The mask includes: a mask body; an exhalation module that is formed at one surface of the mask body; and an inhalation module that is formed at the one surface of the mask body and that includes an inhalation filter. The inhalation filter includes an anodized aluminum oxide film.Type: ApplicationFiled: July 28, 2011Publication date: June 6, 2013Applicant: POSTECH ACADEMY-INDUSTRY FOUNDATIONInventors: Woon Bong Hwang, Sung Kyu Lee, Byung Rak Park, Sang Min Lee, Jae-Sung Park
-
Patent number: 8394283Abstract: The present invention relates to a three-dimensional structure manufacturing method for performing surface treatment processes, and a replication step to provide hydrophobicity on an external surface of the three-dimensional structure. In the manufacturing method, the hydrophobicity may be provided to the external surface of the three-dimensional structure, a high cost device required in the conventional MEMS process is not used, the manufacturing cost is reduced, and the manufacturing process is simplified. In addition, it has been difficult to provide the hydrophobicity on an external surface of a three-dimensional structure having a large surface due to a spatial limitation, but in the exemplary embodiment of the present invention, the hydrophobicity may be provided to the external surface of the three-dimensional structure having a large surface, such as a torpedo, a submarine, a ship, and a vehicle, without the spatial limitation.Type: GrantFiled: March 12, 2008Date of Patent: March 12, 2013Assignee: Postech Academy-Industry FoundationInventors: Dong-Seob Kim, Sang-Min Lee, Woon-Bong Hwang, Kun-Hong Lee, Geun-Bae Lim, Joon-Won Kim, Dong-Hyun Kim, Hyun-Chul Park
-
Patent number: 8372297Abstract: A method for fabricating a membrane is disclosed, to provide both hydrophilicity and hydrophobicity to predetermined positions of a surface of a single membrane. The method for fabricating a membrane includes: preparing a template with nano-scale holes formed on its outer surface; coating a polymer material on a predetermined pattern region of the outer surface of the template; attaching a hydrophilic film on the outer surface of the template; and removing the template from the hydrophilic film.Type: GrantFiled: March 12, 2009Date of Patent: February 12, 2013Assignee: Postech Academy-Industry FoundationInventors: Chang-woo Lee, Dong-seob Kim, Sun Wei, Woon-bong Hwang
-
Patent number: 8325460Abstract: Disclosed are a humidity sensor and a fabricating method thereof. The humidity sensor includes a substrate, an anodic aluminum oxide layer formed on the substrate and having a plurality of holes, and electrodes formed on the anodic aluminum oxide layer, in order to improve sensitivity and accuracy of the humidity sensor. Further, the fabricating method of a humidity sensor includes preparing an aluminum substrate, forming an anodic aluminum oxide layer by oxidizing the aluminum substrate, and forming electrodes on the anodic aluminum oxide layer.Type: GrantFiled: November 13, 2009Date of Patent: December 4, 2012Assignee: Postech Academy-Industry FoundationInventors: Hyun-Chul Park, Hye-Jin Kim, Woon-Bong Hwang, Young-Deuk Kim, Kun-Hong Lee
-
Patent number: 8257630Abstract: A method for fabricating a 3D (three-dimensional) structure such that the 3D structure has a surface with hydrophobicity by using a metal foil such as an aluminum foil is disclosed. The method includes preparing a metal foil base by attaching a metal foil on an outer surface of a predetermined-shaped 3D structure; anodizing the metal foil base; coating a polymer material on the outer surface of the metal foil base material to form a negative replica structure; forming an outer structure by covering an outer surface of the negative replica structure with an outer formation material; and removing the metal foil base.Type: GrantFiled: March 12, 2009Date of Patent: September 4, 2012Assignee: Postech Academy-Industry FoundationInventors: Dong-Seob Kim, Kun-Hong Lee, Woon-Bong Hwang, Geun-Bae Lim, Hyun-Chul Park, Byeong-Joo Lee, Sang-Min Lee, Joon-Won Kim
-
Publication number: 20120216892Abstract: Disclosed is a safety valve of a low-pressure gas pipe which can be installed in a large-scale pipeline through which waste gases generated in a large-scale factory such as a steel mill flow and can reduce maintenance/management costs. The safety valve of a low-pressure gas pipe installed in a waste gas pipeline to discharge condensate includes: a first pipeline connected to a bottom surface of the waste gas pipeline and having a waste gas outlet on an inner wall thereof at one side thereof; a second pipeline extending from the first pipeline to be bent and extending in a direction parallel to the first pipeline; and an opening/closing unit for opening or closing the waste gas outlet.Type: ApplicationFiled: November 3, 2010Publication date: August 30, 2012Applicant: POSTECH ACADEMY-INDUSTRY FOUNDATIONInventors: Woon Bong Hwang, Jeong Hwa Seo, Wan Kyun Chung, Dong Seob KIM