한국섬유공학회지 (Textile Science and Engineering)

  • 제48권5호
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  • Pages.310-314
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  • 2011
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  • 1225-1089(pISSN)
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  • 2288-6419(eISSN)
한국섬유공학회 (The Korean Fiber Society)
권호 표지

산처리된 MWNT의 고분자 전해질 거동에 관한 연구

Polyelectrolytic Behaviors of Carboxylated MWNT

  • 은희천 (숭실대학교 유기신소재.파이버공학과) ;
  • 조아라 (숭실대학교 유기신소재.파이버공학과) ;
  • 곽영제 (숭실대학교 유기신소재.파이버공학과)
  • Eun, Hee-Chun (Department of Organic Materials and Fiber Engineering, Soongsil University) ;
  • Cho, A-Ra (Department of Organic Materials and Fiber Engineering, Soongsil University) ;
  • Kwark, Young-Je (Department of Organic Materials and Fiber Engineering, Soongsil University)
  • 투고 : 2011.09.04
  • 심사 : 2011.10.18
  • 발행 : 2011.10.28
⟨ 이전 논문 다음 논문 ⟩

초록

Anionically charged MWNT with anionic carboxylic acid groups were mixed with cationic organic polymers, such as poly(allyamine hydrochloride) (PAH) and, poly(diallyldimethyl-ammonium chloride) (PDDA) to form polyelectrolyte complexes by coulombic interaction. The complexation behavior of the MWNT was affected by pH when mixed with PAH containing weak basic amine groups. By increasing the content of cationic polymer, the zeta potential of MWNT was increased from a negative values to a positive ones. With higher pH, the isoelectric point of anionic MWNT and cationic PAH increased and the saturated zeta potential value with high PAH content due to the less ionized MWNT and more ionized PAH. On the other hand, strong basic PDDA was less affected by changing pH and showed a similar isoelectric point and saturated zeta potential value with high PAH content. The complexation changed the dispersibility of MWNT in water, with the result that the MWNT was precipitated around the isoelectric point but then re-dispersed with higher cationic polymer content. HR-TEM images confirmed that excess PAH completely covered the MWNT.

키워드

과제정보

연구 과제 주관 기관 : 한국학술진흥재단

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