{"619766":{"#nid":"619766","#data":{"type":"event","title":"PhD Proposal by Narayan Shirolkar","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003ETHE SCHOOL OF MATERIALS SCIENCE AND ENGINEERING\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EGEORGIA INSTITUTE OF TECHNOLOGY\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EUnder the provisions of the regulations for the degree\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cstrong\u003EDOCTOR OF PHILOSOPHY\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cstrong\u003Eon Thursday, April 11, 2019\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E9:00 AM\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003Ein MRDC 4211\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003Ewill be held the\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EDISSERTATION PROPOSAL DEFENSE\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cstrong\u003Efor\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ENarayan Shirolkar\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u0026quot;Processing, Structure, and Properties of Continuous Carbon Materials \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003Ewith Different Cross-sectional Geometries: Towards Lighter Composites\u0026quot;\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EProf. Satish Kumar, Advisor, MSE\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EProf. Jonathan Colton, ME\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EProf. Kyriaki Kalaitzidou, ME\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EProf. Meisha Shofner, MSE\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EProf. Natalie Stingelin, MSE\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract\u003C\/strong\u003E:\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003ECarbon fibers are finding increased usage in a wide variety of applications ranging from aerospace to energy harvesting to sports goods etc. Lighter and stronger than aluminum as well as steel, carbon fibers are an attractive candidate for lightweight structural materials. Carbon fiber composites make up to 50% of the structural weight of modern fuel-efficient aircrafts like the Boeing 787 Dreamliner. However, over the past three decades the improvement in the mechanical properties of carbon fibers has been incremental. In fact, the commercially used aerospace grade carbon fibers today were first manufactured more than 30 years ago. It is therefore necessary to explore alternative routes to improve the specific tensile properties of carbon fibers. This can be done by either reducing the density of the fibers without compromising their mechanical properties or by making composites with higher than 60% reinforcements by volume.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EUsing a gel-spun bi-component islands-in-a-sea precursor with polyacrylonitrile (PAN) as the sea component and polymethylmethacrylate (PMMA) as the sacrificial island component, hollow carbon fibers with a honeycomb cross-section have been produced. While these fibers have a tensile modulus higher than the commercially available carbon fibers, the tensile strength needs to be improved. In this work, by understanding the structural evolution of the fibers during continuous stabilization and carbonization, attempts will be made to further improve the mechanical properties of the hollow carbon fibers.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe specific mechanical properties of the composites can be improved if higher carbon loading is achieved. To achieve this, an alternative geometry viz. near rectangular film cross-section is explored. It is hypothesized that carbon films as compared to fibers, will allow\u0026nbsp;higher carbon loading in composites. Roll-to-roll manufacturing of continuous carbon films using continuous stabilization and carbonization is reported for the first time. Preliminary characterization results are reported. In this study, the processing of continuous gel-spun PAN based carbon films will be studied. Structure-property relationship will be investigated to optimize the carbon film manufacturing process.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EKeywords: \u003C\/strong\u003EHollow carbon fibers, carbon films, structural materials, lightweight materials\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Processing, Structure, and Properties of Continuous Carbon Materials  with Different Cross-sectional Geometries: Towards Lighter Composites"}],"uid":"27707","created_gmt":"2019-03-27 20:09:57","changed_gmt":"2019-03-27 20:09:57","author":"Tatianna Richardson","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2019-04-11T10:00:00-04:00","event_time_end":"2019-04-11T12:00:00-04:00","event_time_end_last":"2019-04-11T12:00:00-04:00","gmt_time_start":"2019-04-11 14:00:00","gmt_time_end":"2019-04-11 16:00:00","gmt_time_end_last":"2019-04-11 16:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"221981","name":"Graduate Studies"}],"categories":[],"keywords":[{"id":"102851","name":"Phd proposal"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}