1. 제 목


Graphite Nanoplatelets and Their Application in Polymer Composites





2. 연 사


H. Thomas Hahn


Raytheon Professor and Chair


Mechanical and Aerospace Engineering Department


UCLA





3. 일 시 : 2004년 9월 6일 월요일 16:00~17:00





4. 장 소 : 서울대학교 신공학관 301동 1512호 세미나실





5. 내 용


Nanocomposites hold promise for bringing forth revolutionary advances in the creation of lightweight, energy-efficient, multifunctional systems. Since nanocomposite development is still in its infancy, optimizing their design and manufacture requires thorough, basic scientific investigations. The present talk discusses the development of nanoplatelet reinforced composites (NRCs), which are comprised of graphite nanoplatelets (GNPs) dispersed within polymer matrices.





Unlike nanofibers, nanoplatelets with high aspect ratio provide reinforcement in two directions and hence offer an excellent opportunity to improve mechanical properties of polymers and fiber-reinforced composites, as shown by organoclay nanoplatelets. Recent advances in our laboratories ensure that a variety of nanoplatelets can be made: our alkali metal intercalation methods can be used to create graphite, bismuth telluride, and transition metal dichalcogenide nanoplatelets through an intercalation and exfoliation process. However, what still remains to be developed is an efficient in situ exfoliation process that is required for production of NRCs. We are currently exploring two exfoliation processes for GNPs based on interlayer gallery polymerization. Both methods use potassium graphite intercalation compounds





To be presented in the talk are further details of the aforementioned intercalation and exfoliation processes, and the properties of GNPs and their composites at various stages of exfoliation.





6. 문 의 : 기계항공공학부 이 우 일 교수 ( ☎ 880-7116 )