{"62554":{"#nid":"62554","#data":{"type":"event","title":"Ericka NJ Ford - PhD Proposal Defense","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EThesis Title:\u003C\/strong\u003E STRUCTURE-PROPERTY RELATIONSHIPS OF\nGEL-SPUN POLY(VINYL ALCOHOL) AND CARBON NANOTUBE COMPOSITE FIBERS\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\n\n\n\n\u003Cp\u003E\u003Cstrong\u003EABSTRACT\u003C\/strong\u003E\u003C\/p\u003E\n\n\n\n\u003Cp\u003EThe process of gel spinning has been employed- because of\nits utility in producing high strength, high modulus fibers of poly(vinyl\nalcohol), PVA.\u0026nbsp; Researchers have embedded\nsingle walled carbon nanotubes (SWNTs) into the matrix of gel-spun PVA fibers\nfor the two-fold purpose of templating molecular chain extension and for\nbearing mechanical stress.\u0026nbsp; The\ndispersion and exfoliation of embedded SWNTs can influence the efficacy of load\ntransfer.\u0026nbsp; Molecular interactions between\ncarbon nanotubes (CNTs), the matrix polymer, and the dispersing solvent are\nknown to influence interfacial adhesion and the distribution of CNTs throughout\nthe polymer composite.\u003C\/p\u003E\n\n\n\n\u003Cp\u003EThe structure-property relationships of stage-drawn PVA\nand SWNT composite fibers are described herein.\u0026nbsp;\nThe mechanical properties, thermal behaviors, and microstructures of\ngel-spun fibers were characterized at several stages of heat drawing.\u0026nbsp; Evidence of the molecular chain extension of\nPVA has been supported by thermal analysis and IR spectroscopy.\u0026nbsp; Structural deviations from the idealized\nmicrostructure include lamellar crystals, solvated polymer, and the\nmisalignment of polymer microphases and SWNTs.\u003C\/p\u003E\n\n\n\n\u003Cp\u003EUniaxially aligned SWNTs were found to influence the\naligning of electron donating and withdrawing moieties of PVA and DMSO.\u0026nbsp; The aligning of PVA\u2019s functional groups has\nbeen attributed to non-covalent bonding, i.e. electronic field effects between\nSWNTs and PVA\u2019s hydroxyl and carbonyl moieties.\u0026nbsp;\nThe sulfoxide moieties of DMSO imbibed in SWNT composite fibers\npreferentially aligned normal to the fibers axis, however no preferential\norientation was observed among unfilled PVA fibers.\u0026nbsp; Nearly 40 % of imbibed DMSO is influenced by\nthe orientation of embedded SWNTs.\u003C\/p\u003E\n\n\n\n\u003Cp\u003ELiterature has reported ageing to have a positive affect\non the drawability of PVA gels.\u0026nbsp; The\nageing of PVA\/CNT gels in being carried out in the current study.\u0026nbsp; The structure and properties of PVA\/CNT fibers\nprocessed with varying gelation histories are under investigation.\u0026nbsp; \u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EThesis Title: STRUCTURE-PROPERTY RELATIONSHIPS OF\nGEL-SPUN POLY(VINYL ALCOHOL) AND CARBON NANOTUBE COMPOSITE FIBERS\u003C\/p\u003E\u003Cp\u003EDate \u0026amp; Time: Thursday, November 18, 2010 at 9:00 AM\u003C\/p\u003E\n\n\u003Cp\u003ELocation: MRDC I 4401\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"Ericka NJ Ford - PhD Proposal Defense"}],"uid":"27388","created_gmt":"2010-11-05 10:56:17","changed_gmt":"2016-10-08 01:53:24","author":"Bill Miller","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2010-11-18T08:00:00-05:00","event_time_end":"2010-11-18T10:00:00-05:00","event_time_end_last":"2010-11-18T10:00:00-05:00","gmt_time_start":"2010-11-18 13:00:00","gmt_time_end":"2010-11-18 15:00:00","gmt_time_end_last":"2010-11-18 15:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1238","name":"School of Materials Science and Engineering"}],"categories":[],"keywords":[{"id":"10802","name":"MSE_Interal_Event"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}