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演講快訊
Effect of Functionalized biopolymers on Stereocomplexation and Properties of Poly(Lactic Acid) Nanocomposite Films, Trays and 3D Printed Implants
[2018/05/15]
教務
Effect of Functionalized biopolymers on Stereocomplexation and Properties of Poly(Lactic Acid) Nanocomposite Films, Trays and 3D Printed Implants

時間

 201805 15 () 10:10 AM  主持人:吳逸謨 教授

                                                 發佈人:陳菊英 助教

講者

 Dr. Vimal Katiyar

 

服務單位

 Department of Chemical Engineering,Indian Institute of Technology Guwahati

 

講題

 Effect of Functionalized biopolymers on Stereocomplexation and Properties of Poly(Lactic Acid) Nanocomposite Films, Trays and 3D Printed Implants

 

地點

 93406

 

語言

 English

 

摘要

      This presentation highlights the use of available bio-resources for value added sustainable polymeric products for Engineering, Commodity and Biomadical Applications. Biopolymers can be extracted from renewable feedstock such as plants, marine animals, insects, etc. It is noteworthy to mention that so far biopolymers extracted from these sources have limited applications in large scale plastic production. Among the available bio-based synthetic plastics, polylactic acid (PLA) has made its own place due to its biodegradability and potential to replace conventional fossil based plastics. It is noteworthy to mention that properties such as melting point, heat deflection temperature and gas barrier properties limits its use in high temperature commodity and engineering applications. However, these limitations can be overcome by developing new class of high molecular weight stereocomplex PLA (sc-PLA). In this context, we have synthesized sc-PLA and its sc-PLA-bionanocomposites by using different biobased nanofillers which includes cellulose nanocrystals, silk nanocrystals, modified chitosan, etc. The GPC analysis reveals that the synthesized stereo-complex based bionanocomposites have molecular weight higher than 100 kDa. The formation of stereocomplex crystallites is confirmed by the XRD analysis. Melting point of the composite is increased even higher than 225°C which suggests the formation of stereocomplex crystallites and the Heat Deflection temperature is enhanced upto ~150°C at nanofillers loading of 5 wt%. Due to the presence of various bionanofillers, ultimate tensile strength is enhanced significantly. Based on the studies, it can be concluded that bionanofillers are good candidates for enhancing the stereocomplexation in the PLA. In this talk, fabrication strategies for synthesis of stereocomplex-PLA-bionanocomposites and evaluation of their properties along with possible applications will be discussed. This talk will also focused on other bionano-fillers fabrications, processing of bionanocomposites into caste films and injection molded products for biomadical, hydrogen storage and supercapacitors applications.

 

學經歷

Ph.D. (Chemical Engineering) Indian Institute of Technology Bombay, India (2007-2008).

M.Tech. (Chemical Engineering) Indian Institute of Technology Kanpur, India (2002).

B.Tech. (Chemical Engineering) Harcourt Butler Technological Institute, Kanpur, India (1997)

 

Associate Professor, IIT Guwahati, India

Assistant Professor, HBTI Kanpur, India

Post-doctoral Fellow, DTU, Denmark

Sr. Research Fellow, IIT Bombay, India

Sr. Engineer, Synthetics & Chemical Pvt. Ltd., India

 


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