Conjugate Electrospinning Devices, Conjugate Nonwoven and Filament Comprising Nanofibers Prepared by Using the Same

Abstract

Discloses are a conjugate electrospinning devices for preparing fibers (nanofibers) having a nano-level thickness, and nanofibers prepared using the same. The conjugate electrospinning devices comprises: spinning dope main tanks ( 1 ); metering pumps ( 2 ); a nozzle block ( 4 ); nozzles ( 5 ) aligned on the nozzle block; a collector ( 7 ) for collecting fibers spun from the nozzle block; and a voltage generator ( 9 ) for applying a voltage to the nozzle block and the collector ( 7 ), wherein [I] nozzles for spinning two or more different kinds of spinning dope are aligned on a nozzle block ( 4 ) regularly or in random order in repetitive units at the same ratio or in different ratios, aligned in random order at a predetermined ratio, or aligned thereon in random order at a predetermined ratio, or aligned thereon repetitively; [II] the number of the spinning dope main tanks ( 1 ) is two or more; and [III] a spinning dope drop device ( 3 ) is arranged between the spinning dope main tanks ( 1 ) and the nozzle block ( 4 ). Since two or more different kinds of spinning dopes are combined and electrospun, and thus the physical properties (features) of a non-woven fabric and a filament can be easily managed by a simple process. Nanofibers and their non-woven fabrics can be mass produced because the fiber formation effects are maximized.

1 . A conjugate electrospinning devices, comprising: spinning dope main tanks  1 ; metering pumps  2 ; a nozzle block  4 ; nozzles  5  aligned on the nozzle block; a collector  7  for collecting fibers spun from the nozzle block; and a voltage generator  9  for applying a voltage to the nozzle block and the collector  7 , wherein
 [I] nozzles for spinning two or more different kinds of spinning dope are aligned on a nozzle block  4  regularly or in random order in repetitive units at the same ratio or in different ratios, aligned in random order at a predetermined ratio, or aligned thereon in random order at a predetermined ratio, or aligned thereon repetitively;   [II] the number of the spinning dope main tanks  1  is two or more; and   [III] a spinning dope drop device  3  is arranged between the spinning dope main tanks  1  and the nozzle block  4 .   
   
   
       2 . The devices of  claim 1 , wherein the nozzles for spinning two or more different kinds of polymer spinning dope are aligned on the nozzle block  4  alternately in a row in either transverse, longitudinal or diagonal direction. 
   
   
       3 . The devices of  claim 1 , wherein the outlets of the nozzles  5  aligned on the nozzle block  4  are formed in an upward direction, and the collector  7  is positioned at an upper part of the nozzle block  4 . 
   
   
       4 . The devices of  claim 1 , wherein the entire part of the nozzle block  4  reciprocates to the left and right. 
   
   
       5 . The devices of  claim 1 , wherein a heater is installed in the collector  7 . 
   
   
       6 . The devices of  claim 1 , wherein an agitator  11   c  is installed in the nozzle block  4 . 
   
   
       7 . The devices of  claim 1 , wherein a spinning dope discharger  12  for forcibly feeding the spinning dope not spun in the nozzle regions to the spinning dope main tank  1  is formed on the upper part of the nozzle block  4 . 
   
   
       8 . The devices of  claim 1 , wherein the collector  7  is fixed or continuously rotates. 
   
   
       9 . The devices of  claim 1 , wherein the outlets of the nozzles  5  are formed in the shape of one or more flared tubes having an angle θ of 90 to 175°. 
   
   
       10 . The devices of  claim 1 , wherein the nozzle block  4  includes: [I] a nozzle plate  4   f  on which nozzles  5  for spinning different spinning dopes are aligned regularly or in random order in repetitive units in the same ratio or in different ratios and two or more spinning dope supply plates  4   h  and  4   h′  positioned at the lower end of the nozzle plate and for supplying the spinning dope to the nozzles; [II] overflow removal nozzles  4   a  surrounding the nozzles  5 , an overflow temporary storage plate  4   g  connected to the overflow removal nozzles and positioned at the right upper end of the nozzle plate and an overflow removal nozzle supporting plate  4   e  positioned at the right upper end of the overflow temporary storage plate and supporting the overflow removal nozzles; [III] air supply nozzles  4   b  surrounding the nozzles  5  and the overflow removal nozzles  4   a,  an air supply nozzle supporting plate  4   c  positioned at the top end of the nozzle block and supporting the air supply nozzles and an air storage plate  4   d  positioned at the right lower end of the air supply nozzle supporting plate and supplying air to the air supply nozzles; [IV] a conductor plate  4   i  having pins aligned in the same way as the nozzles and positioned at the right lower end of the nozzle plate; and [V] a heating plate  4   j  positioned at the right lower end of the spinning dope supply plate. 
   
   
       11 . The devices of  claim 10 , wherein the nozzles for spinning two or more different kinds of polymer spinning dope are aligned on the nozzle block  4  alternately in a row in either transverse, longitudinal or diagonal direction. 
   
   
       12 . A conjugate nanofiber non-woven fabric prepared using the conjugate electrospinning devices of  claim 1 . 
   
   
       13 . A discontinuous conjugate nanofiber filament prepared using the conjugate electrospinning devices of  claim 1 .