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Cationization of Cotton Fibers by Polyethyleneimine Treatment and Its Application to Copper Sulfide Plating

폴리에틸렌이민 처리에 의한 면섬유의 양이온화 및 황화구리 도금에의 응용

  • Kim, Yae Won (Department of Organic Materials and Fiber Engineering, Soongsil University) ;
  • Oh, Pilrok (Department of Organic Materials and Fiber Engineering, Soongsil University) ;
  • Kim, Young Ho (Department of Organic Materials and Fiber Engineering, Soongsil University)
  • 김예원 (숭실대학교 유기신소재.파이버공학과) ;
  • 오필록 (숭실대학교 유기신소재.파이버공학과) ;
  • 김영호 (숭실대학교 유기신소재.파이버공학과)
  • Received : 2018.03.30
  • Accepted : 2018.04.30
  • Published : 2018.06.30

Abstract

Cotton fabrics were treated with polyethyleneimine (PEI), in order to cationize cellulose fibers and convert them into electro-conductive fibers by electroless plating of copper sulfide (CuS), using the introduced functional groups. As the PEI concentration increased and the treatment temperature decreased, the add-on (weight increase after treatment) of the PEI-treated fabric increased. However, treatment times of more than 30 minutes did not further affect the add-on. The PEI-treated cotton fabrics could be dyed with an acid dye, confirming that the fabrics were cationized. The apparent dye uptake according to the Mubelka-Munk equation (K/S value) of the dyed samples increased sharply with increasing PEI concentration, reached a maximum at 0.01 %(w/v), and then decreased with further increases in PEI concentration. These results indicate that a PEI concentration as low as 0.01% was sufficient for the cationization of cotton fibers. The PEI-pretreated cotton fabrics were electroless plated with CuS, using solutions containing both $CuSO_4$ and $Na_2S_2O_3$ and the electrical conductivity was compared by measuring the surface resistance. When a 4 % (w/v) $CuSO_4$ and 4 % (w/v) $Na_2S_2O_3$ solution was used for plating at $80^{\circ}C$, the CuS plated samples showed a very low surface resistance of $1-2{\Omega}/sq$. Although the maximum K/S value of the dyed fabric was obtained at 0.01% PEI concentration, the surface resistance of the samples decreased continuously, before reaching an almost constant value at the PEI concentration of 0.5%.

Keywords

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