{"id":1672,"date":"2019-10-15T16:32:42","date_gmt":"2019-10-15T20:32:42","guid":{"rendered":"https:\/\/cbe.ncsu.edu\/velevgroup\/?page_id=1672"},"modified":"2019-10-15T16:32:43","modified_gmt":"2019-10-15T20:32:43","slug":"seonju-yeo","status":"publish","type":"page","link":"https:\/\/cbe.ncsu.edu\/velevgroup\/members\/seonju-yeo\/","title":{"rendered":"Seonju Yeo"},"content":{"rendered":"\n<table class=\"wp-block-table has-fixed-layout\"><tbody><tr><td><a href=\"syeo@ncsu.edu\">syeo@ncsu.edu<\/a><br><br>PhD, Chemical Engineering, 2017<br>Sungkyunkwan University, Republic of Korea<br><br>M.S., Chemical Engineering, 2013<br>Sungkyunkwan University, Republic of Korea<br><br>B.S., Chemical Engineering, 2011<br>Sungkyunkwan University, Republic of Korea<\/td><td><img loading=\"lazy\" decoding=\"async\" width=\"356\" height=\"464\" class=\"wp-image-1673\" style=\"width: 300px\" src=\"https:\/\/cbe.ncsu.edu\/velevgroup\/wp-content\/uploads\/sites\/8\/2019\/10\/ID-picture_SJYeo.jpg\" alt=\"\"><\/td><\/tr><\/tbody><\/table>\n\n\n\n<p><strong>Research Focus #1: Polymer nanocomposite\nmaterials<\/strong><\/p>\n\n\n\n<p>Materials combining improved optical\ntransparency and mechanical strength would be highly beneficial for\napplications in electronic devices, display, and protective films. My research\nfocuses on the fabrication of strong, tough, and transparent polymer composite\nmaterials with cellulose nanocrystals (CNCs). CNCs are studied as reinforcing\nnanofillers in polymer composites due to their intriguing properties including\nbiocompatibility, biodegradability, abundance, low weight, and excellent\nmechanical strength and stiffness. Due to the presence of stiff reinforcing\nnanofillers, the modulus and hardness of the composite films can be 2-3 times\nhigher than pure polymer films. Thus, these materials have great potential in\nreplacing conventional silica-based glasses or developing anti-scratch films\nthat combine high strength, optical transparency, and enhanced damage\ntolerance.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><strong>Research\nFocus #2: 3D printing of composite materials incorporating stimuli-responsive\nmicrocapsules<\/strong><\/p>\n\n\n\n<p>Our group has\nrecently demonstrated a new class of stimulus-responsive transparency-changing\nmaterials based on biphasic composites. The composites are fabricated by simple\nemulsification of refractive index (RI) matched droplets in a silicone matrix.\nThis RI matching technique allows us to fabricate colorful, yet transparent,\nsilicone materials. The composites change their transparency when external\nstimuli, including osmotic pressure and temperature, induce a slight RI\nmismatch between the silicone matrix and the droplets. Along with an understanding\nof the optical properties of composite films, our group continues to focus on\ntheir inhomogeneous swelling behavior in DI water; this results in the\nformation of multifunctional composite films, which exhibit wrinkled surface,\nshape memory behavior, surface hardening, and strong adhesion under water. These\ncomposite materials can also be used as 3D printing inks to create more complex\nstructures with controlled architectures and composition over a large scale.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>syeo@ncsu.edu PhD, Chemical Engineering, 2017Sungkyunkwan University, Republic of Korea M.S., Chemical Engineering, 2013Sungkyunkwan University, Republic of Korea B.S., Chemical Engineering, 2011Sungkyunkwan University, Republic of Korea&#8230;<\/p>\n","protected":false},"author":197,"featured_media":0,"parent":36,"menu_order":17,"comment_status":"closed","ping_status":"closed","template":"page-left.php","meta":{"_acf_changed":false,"first_name":[],"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"class_list":["post-1672","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/cbe.ncsu.edu\/velevgroup\/wp-json\/wp\/v2\/pages\/1672","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cbe.ncsu.edu\/velevgroup\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/cbe.ncsu.edu\/velevgroup\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/cbe.ncsu.edu\/velevgroup\/wp-json\/wp\/v2\/users\/197"}],"replies":[{"embeddable":true,"href":"https:\/\/cbe.ncsu.edu\/velevgroup\/wp-json\/wp\/v2\/comments?post=1672"}],"version-history":[{"count":1,"href":"https:\/\/cbe.ncsu.edu\/velevgroup\/wp-json\/wp\/v2\/pages\/1672\/revisions"}],"predecessor-version":[{"id":1674,"href":"https:\/\/cbe.ncsu.edu\/velevgroup\/wp-json\/wp\/v2\/pages\/1672\/revisions\/1674"}],"up":[{"embeddable":true,"href":"https:\/\/cbe.ncsu.edu\/velevgroup\/wp-json\/wp\/v2\/pages\/36"}],"wp:attachment":[{"href":"https:\/\/cbe.ncsu.edu\/velevgroup\/wp-json\/wp\/v2\/media?parent=1672"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}