화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.18, No.8, 713-720, August, 2010
DOI10.1007/s13233-010-0801-9  Export Citation
Enhancement of Thermal Stability and Phase Relaxation Behavior of Chitosan Dissolved in Aqueous l-Lactic Acid: Using ‘Silver Nanoparticles’ as Nano Filler
V. K. Rana, Asutosh K. Pandey, Raj Pal Singh†, B. Kumar1, Satyendra Mishra2, and Chang-Sik Ha3
  • Division of Polymer Science and Engineering, National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411 008, India
  • 1Lab. of Polymers Properties at Interfaces & Composites Research Center, University of South Brittany, 56321, Lorient Cedex, France
  • 2Department of Chemical Technology, North Maharastra University, Jalgaon, 425001, India
  • 3Department of Polymer Science and Engineering, Pusan National University, Busan, 609-735, Korea
E-mail:
Chitosan films with various compositions of silver nanoparticles were prepared by solution casting with an aqueous solution of chitosan and l-lactic acid. The chitosan/Ag nanocomposites were characterized by wide angle Xray diffraction (WAXD) and UV-vis spectroscopy. An analysis of the surface topography and size of the Ag nanoparticles (≤100 nm) were characterized by scanning electron microscopy (SEM) and atomic force microscopy (AFM), respectively. Thermogravimetric analysis (TGA/DTA) confirmed the increase in thermal stability with increasing Ag nanoparticle content in the nanocomposites. Dynamic thermal analysis (DMA) was used to examine the phase relaxation behavior of chitosan and its nanocomposites. The conductivity of chitosan/Ag nanocomposites was considered with respect to the frequency. Contact angle measurements were used to characterize the surface twistability, surface cleanliness, and hydrophilic/hydrophobic nature of the surface.
Keywords:chitosan;silver nanoparticles;relaxation;conductivity;contact angle
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