Abstract: Provided is a microplastic recovery material according to an embodiment of the inventive concept including a porous structure including a first hierarchical pocket provided in an outer surface thereof, and a nano-protrusion provided on the outer surface. The first hierarchical pocket includes a first pocket and a second pocket that are connected to each other. The first pocket has a diameter of about 1 mm to about 5 mm. The second pocket has a diameter of about 1 ?m to about 100 ?m.

Abstract: Provided is an oil-sorbent including a hydrophilic structure. The hydrophilic structure includes a plurality of macro pores. The macro pores have an average diameter of at least about 2 mm. An oil-sorbent includes a hydrophilic structure including a plurality of macro pores. The hydrophilic structure has an open-porous structure and has a porosity of at least 70%.

Abstract: The present disclosure is directed to providing a toothed conveyor belt type oil recovery device including: a recovery conveyor which is rotates in such a way that a continuous track rotates, the recovery conveyor having multiple teeth made of a hydrophilic material on an outer surface, the recovery conveyor having one side positioned in water in which oil is spilled to recover the oil while feeding the oil into a space between the adjacent teeth by the rotation; and a separation unit which holds an oil separating liquid, and is positioned on the other side of the recovery conveyor to separate the oil from the teeth while the oil separating liquid is fed into the space between the adjacent teeth by capillary suction when the teeth move on to the oil separating liquid on the other side of the recovery conveyor by the rotation of the recovery conveyor.

Abstract: The present invention relates to: a method of manufacturing glass with hollow nanopillars, which includes a silicon oxide layer forming step in which a silicon oxide layer made of silicon oxide is formed on one side of a glass substrate, a first etching step in which the silicon oxide layer is etched and a plurality of silicon oxide clusters are formed on the glass substrate, and a second etching step in which the glass substrate, on which the silicon oxide clusters are formed, is etched and hollow nanopillars are formed; and glass with hollow nanopillars manufactured thereby.

Abstract: A sound absorption device and a method of manufacturing the same are provided. The sound absorption device includes a sound absorbing panel including first elements, second elements, third elements, and fourth elements arranged in different directions, wherein a cross-section of at least one of the first through fourth elements has a distorted circular shape, a distorted polygonal shape, or a distorted elliptical shape.

Abstract: The present disclosure is directed to providing an oil-water separation filter structure including a base guide having a separated water outlet hole through which a fluid separated from a mixed fluid including an impurity exits, an oil-water separation filter disposed on the base guide to separate the impurity and the fluid included in the mixed liquid, and a top guide disposed on the oil-water separation filter, having at least one mixed fluid inlet hole through which the mixed fluid enters, and coupled to the base guide. According to the present disclosure, the oil-water separation filter structure includes a hydrophilic material to separate water and oil, and as opposed to the existing nonwoven fabric type filters, can be continuously used, thereby preventing environmental pollution problems.

Abstract: Provided is a toothed drum type oil recovery device, which includes: a recovery drum having a center coupled to a rotary shaft and having a plurality of tooth units formed around an outer circumference thereof, wherein one side of the recovery drum is disposed in the water to which oil is spilled so that the oil is recovered by the tooth unit at one side of the recovery drum according to the rotation; and a separation unit containing an oil separating liquid and disposed at the other side of the recovery drum, wherein when the tooth unit moves onto the oil separating liquid at the other side of the recovery drum according to the rotation of the recovery drum, the oil separating liquid is introduced into a space between the tooth units adjacent to each other by means of a capillary action to separate the oil from the tooth unit.

Abstract: The present disclosure is directed to providing impeller type oil transportation device including; a transport unit provided such that a mixed fluid including an oil is fed on one side; and an impeller provided in the transport unit, the impeller including a core connected to a rotation axis, and wings extending radially from the core and having hydrophilic teeth on an outer surface to transport the mixed fluid including the oil to the other side of the transport unit by rotation, wherein the impeller is provided in the transport unit such that parts of the wings are exposed above a surface of the mixed fluid, to separate the oil adhered to the teeth while the mixed fluid is fed into a space between the adjacent teeth by capillary flow when the wings exposed above the surface of the mixed fluid move on to the mixed fluid by the rotation.

Abstract: The present disclosure is directed to providing impeller type oil transportation device including; a transport unit provided such that a mixed fluid including an oil is fed on one side; and an impeller provided in the transport unit, the impeller including a core connected to a rotation axis, and wings extending radially from the core and having hydrophilic teeth on an outer surface to transport the mixed fluid including the oil to the other side of the transport unit by rotation, wherein the impeller is provided in the transport unit such that parts of the wings are exposed above a surface of the mixed fluid, to separate the oil adhered to the teeth while the mixed fluid is fed into a space between the adjacent teeth by capillary flow when the wings exposed above the surface of the mixed fluid move on to the mixed fluid by the rotation.

Abstract: Provided are a cellulose composite material, a three-dimensional (3D) printing material and a 3D printing structure including the cellulose composite material, and a method of manufacturing a 3D printing structure using the cellulose composite material. The cellulose material may be used as a 3D printable eco-friendly material using cellulose that is an eco-friendly natural material and a compound having a catechol group that is derived from nature, and a structure implemented with 3D printing has excellent tensile strength or compressive strength.

Abstract: A sound absorption structure and a method of manufacturing the same are provided. The sound absorption structure includes a first sound absorption layer comprising first elements of which longitudinal directions are misaligned in a thickness direction of the sound absorption structure, the first sound absorption layer having a first internal filling density and absorbing sound waves of a first reactance frequency; and a second sound absorption layer disposed on the first sound absorption layer, having a second internal filling density different from the first internal filling density, and absorbing sound waves of a second reactance frequency different from the first reactance frequency.

Abstract: The present disclosure is directed to providing a toothed conveyor belt type oil recovery device including: a recovery conveyor which is rotates in such a way that a continuous track rotates, the recovery conveyor having multiple teeth made of a hydrophilic material on an outer surface, the recovery conveyor having one side positioned in water in which oil is spilled to recover the oil while feeding the oil into a space between the adjacent teeth by the rotation; and a separation unit which holds an oil separating liquid, and is positioned on the other side of the recovery conveyor to separate the oil from the teeth while the oil separating liquid is fed into the space between the adjacent teeth by capillary suction when the teeth move on to the oil separating liquid on the other side of the recovery conveyor by the rotation of the recovery conveyor.

Abstract: The present disclosure relates to an anti-droplet mask filter and an anti-droplet mask comprising the same, and more particularly, to a hydrophobic filter having ridges and an anti-droplet mask comprising the same. The present disclosure is directed to providing a mask filter with improved water repellency performance for effectively preventing the spread of acute respiratory syndrome virus infections. The super water-repellent anti-droplet nonwoven filter of the present disclosure shows superhydrophobicity with the surface contact angle of 160° or more due to the ridges that form a nanopatterned structure on the surface of hydrophobic fibers and the surface of bonding portions, thereby preventing the adsorption of droplets onto the surface of the filter. Additionally, the super water-repellent anti-droplet nonwoven filter of the present disclosure can capture ultrafine particles such as aerosols due to the nanopatterned structure on the surface of the super water-repellent anti-droplet nonwoven filter.

Abstract: Provided is a toothed drum type oil recovery device, which includes: a recovery drum having a center coupled to a rotary shaft and having a plurality of tooth units formed around an outer circumference thereof, wherein one side of the recovery drum is disposed in the water to which oil is spilled so that the oil is recovered by the tooth unit at one side of the recovery drum according to the rotation; and a separation unit containing an oil separating liquid and disposed at the other side of the recovery drum, wherein when the tooth unit moves onto the oil separating liquid at the other side of the recovery drum according to the rotation of the recovery drum, the oil separating liquid is introduced into a space between the tooth units adjacent to each other by means of a capillary action to separate the oil from the tooth unit.

Abstract: Provided are a method of producing a nano composite structure and a nano composite structure produced by using the same. The method comprises producing a substrate; placing a metal net structure above the substrate; and plasma treating the substrate above which the metal net structure is placed. The method allows a nano composite structure with a nano patterned structure on its overall surface to be easily produced. The nano composite structure includes a substrate having a plurality of first protrusions constituting a nano pattern on its surface; and an inorganic particle disposed on an end of at least a portion of the first protrusions.

Abstract: The present disclosure relates to a filter apparatus for oil-water separation, and according to an embodiment of the present disclosure, when the filter apparatus for oil-water separation is mounted in a mixed fluid storage tank for storing a mixed fluid collected in seas or rivers in the event that an oil spill accident occurs, it is possible to drain off only water in the mixed fluid. In addition, it is possible to increase the storage efficiency of the mixed fluid storage tank by selectively draining and removing only water other than oil and impurities in the mixed fluid stored in the mixed fluid storage tank.

Abstract: The present disclosure is directed to providing an oil-water separation filter structure including a base guide having a separated water outlet hole through which a fluid separated from a mixed fluid including an impurity exits, an oil-water separation filter disposed on the base guide to separate the impurity and the fluid included in the mixed liquid, and a top guide disposed on the oil-water separation filter, having at least one mixed fluid inlet hole through which the mixed fluid enters, and coupled to the base guide. According to the present disclosure, the oil-water separation filter structure includes a hydrophilic material to separate water and oil, and as opposed to the existing nonwoven fabric type filters, can be continuously used, thereby preventing environmental pollution problems.

Abstract: Provided are a method of producing a nano composite structure and a nano composite structure produced by using the same. The method comprises producing a substrate; placing a metal net structure above the substrate; and plasma treating the substrate above which the metal net structure is placed. The nano composite structure includes a substrate having a plurality of first protrusions constituting a nano pattern on its surface; and an inorganic particle disposed on an end of at least a portion of the first protrusions.

Abstract: The present invention relates to: a method of manufacturing glass with hollow nanopillars, which includes a silicon oxide layer forming step in which a silicon oxide layer made of silicon oxide is formed on one side of a glass substrate, a first etching step in which the silicon oxide layer is etched and a plurality of silicon oxide clusters are formed on the glass substrate, and a second etching step in which the glass substrate, on which the silicon oxide clusters are formed, is etched and hollow nanopillars are formed; and glass with hollow nanopillars manufactured thereby.

Abstract: The present disclosure relates to a rotating type foreign substance collection equipment, and according to an embodiment of the present disclosure, there is an effect in separating and collecting foreign substances such as oil from foreign substance-fluid mixtures at high speeds by the separation membrane that traps foreign substances such as oil that float in water while allowing sea water or river water to pass through and be discharged.