繊維基礎科学研究委員会
講演会
繊維基礎化学研究会講演会
令和元年5月27日（月）
午後２時〜午後３時
場所：京都工芸繊維大学１５号館２F N205遠隔講義室
Alan I. Nakatani博士
主催：繊維学会 繊維基礎科学研究委員会
委員長：櫻井伸一（京都工芸繊維大学 繊維学系、075-724-7864）
繊維基礎化学研究会例会
平成３０年６月２５日（火）
午後１時３０分〜２時３０分
場所：京都工芸繊維大学 １５号館１F N105講義室
Manipulating Polymers with Light Activated Chemistries for Manufacturing Fibers and Patterning Films
Christopher J. Ellison 先生
Department of Chemical Engineering and Materials Science
University of Minnesota
Light activated chemistries are powerful for controlling the structure and function of polymers without the need for contacting the sample. Here recent research will be described from two projects where light is employed to enable new polymer processing capabilities. First, a non-contact strategy for high-speed patterning of arbitrary shapes in polymer films will be described. In this approach, a topographical pattern can be preprogrammed and photochemically stored in a flat solid film. The topography is later revealed by simple thermal annealing without use of a wet or dry etch step, unlike traditional photoresist methods. It will also be shown that the mechanism for this process is rooted in the Marangoni effect that can induce flow of polymer melts driven by patterned surface energy gradients. The second project seeks to address the fact that fibers have been manufactured for decades using solvents or heat to reduce the viscosity of polymers and promote drawing. However, nature has engineered spiders and silkworms with benign ways of making silk fibers with high strength and toughness. Their approach of chemically linking small functional units into long chain molecules and solid fibrillar structures while simultaneously extruding fibers is fundamentally different from current synthetic fiber manufacturing methods, where extrusion of pre-formed long chain polymers is facilitated with organic solvents or heat. Drawing inspiration from nature, a method will be described that uses light to trigger a thiol-ene photopolymerization to rapidly transform reactive liquid mixtures into solid thread-like structures as they are forced out of a capillary at high speeds. Besides being manufactured without using solvents/volatile components or heat, these fibers are mechanically robust and have excellent chemical and thermal stability due to their crosslinked nature.
連絡先：京都工芸繊維大学 繊維学系
櫻井伸一（075-724-7864）
多数の皆様のご参加をお待ち致しております。
繊維基礎化学研究会例会
平成３０年６月５日（火）
午後４時１０分〜５時３０分
場所：京都工芸繊維大学 １５号館１F N105講義室
Bionanocrystals: Fabrication and Its Uses in Commodity, Engineering and Biomedical Applications
Vimal Katiyar先生
Coordinator, CoE-SusPol, Department of Chemical Engineering, Indian Institute of Technology Guwahati Guwahati, Assam, India
連絡先：京都工芸繊維大学 繊維学系（バイオベスマテリアル学専攻）
櫻井伸一（075-724-7864）
多数の皆様のご参加をお待ち致しております。
繊維基礎化学研究会例会
平成２９年１０月２３日（月）
午後４時１０分〜５時３０分
場所：京都工芸繊維大学
１５号館N105多目的コラボレーションエリア
Settlement of Crystalline Structure of Group II-VI Semiconductor Nanoparticles by Profile Refinement Technique and Size Determination by Tight Binding Model
Surendra Kumar Gautam先生
ネパール、トリブヴァン大学
連絡先：京都工芸繊維大学 繊維学系（バイオベスマテリアル学専攻）
櫻井伸一（075-724-7864）
多数の皆様のご参加をお待ち致しております。