Article
  • Synthesis of Thermoresponsive Poly(N-isopropylacrylamide)/Clay Nanocomposites
  • Kim JP, Lyu SG, Bae KS, Sur GS
  • 열응답성 Poly(N-isopropylacrylamide)/Clay 나노복합재료의 합성
  • 김정필, 유성구, 배광수, 서길수
Abstract
MAPTAC-MMT was prepared by exchanging the mineral cation (sodium montmorillonite) with 3-(methacryloyl amino) propyltrimethyl ammonium chloride, thus rendering the mineral organophilic and forming polymerizable moieties directly bonded to the surface of montmorillonite (MMT). Thermoresponsive nanocomposites (PNIP AM-MMT) were synthesized by polymerization of N-isopropyl acrylamide in an aqueous suspension of MAPTAC-MMT at room temperature. Thermoresponsive nanocomposites exhibited a low critical solution temperature (LCST) similar to unmodified poly(N-ispropyl acrylamide) (PNIPAM). The LCST of thermoresponsive nanocomposites decreased in proportion to the amount of MAPTAC-MMT. TGA results showed that the thermal stability of thermoresponsive nanocomposites was improved compared to PNIPAM itself the thermoresponsive polymer.

나트륨 몬모릴로나이트(Na+-MMT)의 양이온을 3-(methacryloyl amino) propyltrimethyl ammonium chloride (MAPTAC)와 교환반응시켜 몬모릴로나이트의 표면을 친유성으로 개질시키는 동시에, 단량체와 공중합을 할 수 있는 이중결합이 부착된 MAPTAC-MMT를 제조하였다. 상온에서 MAPTAC-MMT가 분산된 수용액에서 N-isopropyl acryl amide (NIPAM)를 중합하여 열응답성 나노복합재료(PNIPAM-MMT)를 제조하였다. MAPTAC-MMT으로부터 제조된 열응답성 나노복합재료는 열응답성 고분자인 poly(N-isopropyl acrylamide) (PNIPAM)와 마찬가지 하한임계용액온도(LCST)를 나타내었으며, MAPTAC-MMT의 양이 증가함에 따라 PNIPAM-MMT의 LCST는 감소하였다. 또한 TGA실험 결과에서 열응답성 나노복합재료의 열안정성이 열응답성 고분자에 비하여 우수하였음을 보였다.

Keywords: montmorillonite; thermoresponsive nanocomposite; low critical solution temperature

References
  • 1. Kojima Y, Usuki A, Okada, Kawasumi M, Kurauchi T, Kumigaito O, J. Polym. Sci. A: Polym. Chem., 31, 983 (1993)
  •  
  • 2. Vaia RA, Vasudevan S, Krawiec W, Scanlon LG, Giannelis EP, Adv. Mater., 7, 154 (1995)
  •  
  • 3. Wu J, Lerner MM, Chem. Mater., 5, 835 (1993)
  •  
  • 4. Messersmith PB, Giannelis EP, J. Polym. Sci. A: Polym. Chem., 33(7), 1047 (1995)
  •  
  • 5. Bumside SD, Giannelis EP, Chem. Mater., 7, 1597 (1995)
  •  
  • 6. Yano K, Usuki A, Kurauchi T, Kamigaito OJ, J. Polym. Sci. A: Polym. Chem., 31, 2493 (1993)
  •  
  • 7. Blumstein A, J. Polym. Sci. A: Polym. Chem., 3, 2653 (1965)
  •  
  • 8. Theng BKGFormation and Properties of Clay-Polymer Complexes, Elsevier, New York (1979)
  •  
  • 9. Lan T, Pinnavaia TJ, Chem. Mater., 6, 2216 (1994)
  •  
  • 10. Okada A, Kawasumi AM, Kurauchi T, Kumigaito O, Polym. Prepr., 28, 447 (1987)
  •  
  • 11. Kojima Y, Usuki A, Kawasumi M, Okada A, Kurauchi T, Kumigaito O, J. Polym. Sci. A: Polym. Chem., 31, 983 (1993)
  •  
  • 12. Ryu JG, Park GR, Lyu SG, Rhew JH, Sur GS, Polym.(Korea), 22(2), 328 (1998)
  •  
  • 13. Choi HK, Ryu JG, Lyu SG, Kim BS, Sur GS, J. Korean Ind. Eng. Chem., 10(6), 960 (1999)
  •  
  • 14. Choi HK, Park YH, Lyu SG, Kim BS, Sur GS, Polym.(Korea), 23(3), 456 (1999)
  •  
  • 15. Choi HK, Ryu JG, Lyu SG, Kim BS, Sur GS, J. Korean Ind. Eng. Chem., 10(6), 960 (1999)
  •  
  • 16. Lyu SG, Park GR, Sur GS, Polym.(Korea), 23(6), 884 (1999)
  •  
  • 17. Choi HK, Park YH, Lyu SG, Kim BS, Sur GS, Polym.(Korea), 23(5), 724 (1999)
  •  
  • 18. Lyu SG, Park YH, Rhew JH, Sur GS, J. Inst. Ind. Technol., 26, 139 (1998)
  •  
  • 19. Bae YH, Okano T, Hsu R, Kim SW, Makromol. Chem. Rapid Commun., 8, 481 (1987)
  •  
  • 20. Feil H, Bae YH, Feij J, Kim SW, J. Membr. Sci., 64, 283 (1991)
  •  
  • 21. Fujimura M, Mori T, Tosa T, Biotechnol. Bioeng., 29, 747 (1987)
  •  
  • 22. Carenza M, Yoshida M, Kumakura M, Fujimura T, Eur. Polym. J., 29, 1013 (1993)
  •  
  • 23. Shibayama M, Suetoh Y, Nomura S, Macromolecules, 29(21), 6966 (1996)
  •  
  • 24. Zeng F, Tong Z, Feng HQ, Polymer, 38(22), 5539 (1997)
  •  
  • 25. Kim K, Shin YJ, Polym.(Korea), 18(5), 860 (1994)
  •  
  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2023 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2001; 25(2): 263-269

    Published online Mar 25, 2001

  • Received on Oct 14, 2000