Fiber composite structure and manufacturing method thereof

Abstract

Provided is a fiber composite structure including a plurality of twisted fiber bundles, wherein each of the fiber bundles includes a plurality of fiber strands, an adhesive coated on the fiber strands, and a functional particle interposed between the fiber strands. The functional particle includes a material different from that of the fiber strands. The adhesive includes polydopamine.

What is claimed is: 
     
         1 . A fiber composite structure comprising:
 a plurality of fiber bundles, wherein each of the fiber bundles includes a plurality of fiber strands;   an adhesive coated on the fiber strands; and   a functional particle interposed between the fiber strands,   wherein:
 the functional particle includes a material different from that of the fiber strands; and 
 the adhesive includes polydopamine. 
   
     
     
         2 . The fiber composite structure of  claim 1 , wherein the fiber strands comprise a natural fiber or an artificial fiber. 
     
     
         3 . The fiber composite structure of  claim 2 , wherein the natural fiber comprises at least one of a ramie fiber, a linen fiber, a cotton fiber, a jute fiber, a wool fiber, a silk fiber, or a fur fiber. 
     
     
         4 . The fiber composite structure of  claim 2 , wherein the natural fiber comprises a fibrous structure like human hair. 
     
     
         5 . The fiber composite structure of  claim 2 , wherein the artificial fiber comprises at least one of polyethylene terephthalate (PET), polypropylene, polyester, nylon, Kevlar, an acrylic fiber, a metal fiber, a glass fiber, or a carbon fiber. 
     
     
         6 . The fiber composite structure of  claim 1 , wherein the functional particle comprises at least one of a nano-material such as cellulose, graphene, carbon nanotube, and carbon black, or a particulate material having a size of approximately 1 to approximately 100 micrometers, such as a black rayon particle. 
     
     
         7 . The fiber composite structure of  claim 1 , wherein a first aspect ratio of each of the fiber strands is greater than a second aspect ratio of the functional particle. 
     
     
         8 . The fiber composite structure of  claim 7 , wherein:
 the first aspect ratio is 1 to 1000; and   the second aspect ratio is 1 to 10.   
     
     
         9 . The fiber composite structure of  claim 1 , wherein a gap between adjacent fiber strands forms a pore, wherein the pore has a size of approximately 10 nm to approximately 100 μm. 
     
     
         10 . A fiber composite structure comprising:
 a plurality of collected or twisted fiber bundles, wherein each of the fiber bundles includes a plurality of fiber strands; and   an adhesive coated on the fiber strands,   wherein:
 the adhesive includes protruding first nano-protrusions; and 
 the adhesive includes polydopamine. 
   
     
     
         11 . The fiber composite structure of  claim 10 , wherein the first nano-protrusion has the shape of a nano-fiber, a nano-pillar, or a combination thereof. 
     
     
         12 . The fiber composite structure of  claim 10 , wherein each of the fiber bundles comprises second nano-protrusions on the surface thereof,
 wherein:
 the first nano-protrusions are disposed on the second nano-protrusions; and 
 the first nano-protrusions vertically overlap the second nano-protrusions corresponding thereto, respectively. 
   
     
     
         13 . A method for manufacturing a fiber composite structure, the method comprising:
 preparing a plurality of fiber bundles;   wetting the fiber bundles in a solution containing an adhesive material; and   drying the fiber bundles in the air immediately after taking the fiber bundles wetted in the solution out of the solution.   
     
     
         14 . The method of  claim 13 , wherein the wetting of the fiber bundles in the solution is performed within 1 minute. 
     
     
         15 . The method of  claim 13 , wherein the drying of the fiber bundles is performed within 1 hour. 
     
     
         16 . The method of  claim 13 , wherein the solution further comprises a functional particle, wherein the functional particle includes at least one of a nano-material such as cellulose, graphene, carbon nanotube, and carbon black, or a particulate material having a size of approximately 1 to approximately 100 micrometers, such as a black rayon particle. 
     
     
         17 . The method of  claim 13 , further comprising performing a plasma treatment on surfaces of the fiber bundles prior to the wetting of the fiber bundles in the solution. 
     
     
         18 . The method of  claim 17 , wherein the adhesive material comprises one among catechol-based adhesive materials such as dopamine, polydopamine, pyrogallol, alpha-methyldopamine, norepinephrine, dihydroxyphenylalanine, alpha-methyldopa, droxdodopa, 5-hydroxydopamine, deacetylated chitosan-catechol, hyaluronic acid-catechol, and alginate-catechol, or chitosan, poly(allylamine), poly(L-lysine), and poly(ethyleneimine).