신소재공학과

Seminar

Extra Form
Date 20181120

MSE Regular Seminar



■ Title :  Biomimetic functional hydrogels with anisotropic structures 

           

■ Speaker :  Prof. Youn Soo Kim (Department of MSE, POSTECH)  

 

■ Date and Time :  11/20 (Tue) 16:00

 

■ Venue :  Applied Engineering Building (W1) 1st Floor, Multimedia Seminar Room

 

 Host :  Prof. Hyuck-Mo Lee  

  

 Abstract :  

 

 

 

Scheme 1.  Schematic representation of the preparation of anisotropic hydrogel

containing cofacially oriented 2D materials.

 

The development of muscle-like hydrogel actuators that can convert chemical energies into large, quick, and unidirectional motions is one of the long-standing research topics in materials sciences. Various hydrogel actuators have been developed so far, however, their actuation has inherent limitation in efficiency, because of their primitive actuation mechanism simply relying on the volume changes through the swelling and deswelling of gel networks. In addition, the volume changes are usually isotropic and not suitable to produce anisotropic motion. These limitations could be overcome through the imitation of mechanisms shown in Nature’s living creatures, offering an enormous potential for the development of functional soft materials that may improve our life.  As represented by muscular tissues, some biological tissues are composed of numerous nanoscopic subunits that are assembled into anisotropically oriented structures extending over a macroscopic size regime.  Such hierarchical structures are the origin of the excellent biological functions, and their reproduction in artificial systems is a great challenge. To address this challenge, we have recently developed polymer networks with 'single-crystal-like' structural order, where 2D-shaped inorganic materials were employed as constituents. This 3D network of this hydrogel is composed of a stimuli-responsive polymer, so that the polarity and dynamics of the gel matrix are abruptly changed in response to external stimuli, which causes the switching of the intensity of the ‘embedded electrostatics’. Thereby, it produces quick and anisotropic deformation of the hydrogel. In this presentation, their unprecedented functions originating from anisotropic structures will be discussed.


(1) Y.S. Kim, M. Liu, Y. Ishida, Y. Ebina, M. Osada, T. Sasaki, T. Hikima, M. Takata, T. Aida, Nature Mat. 201514, 1002.

(2) Sano, K.; Kim, Y. S.; Ishida, Y.; Ebina, Y.; Sasaki, T.; Hikima, T.; Takata, M.; Aida, T. Nature Commun. 20167, 12559.

(3) Kim, Y. S.; Tamate, R.; Akimoto, A. M.; Yoshida, R. Mater. Horiz. 20164, 38.


List of Articles
No. Category Subject Author Date Views
Notice Regular 12/4 (Tue) Prof. Doo Seok Jeong (Hanyang Univ., Department of MSE) ADMINI 2018.11.30 119
Notice Regular 11/27 (Tue) Prof. Seong-Jun Jeong (Soongsil Univ.) ADMINI 2018.11.26 118
» Regular 11/20 (Tue) Prof. Youn Soo Kim (Department of MSE, POSTECH) ADMINI 2018.11.19 175
Notice Special 11/14 (Wed) Prof. Hui-Ming Cheng (Director and Professor, Tsinghua University, IMR CAS) ADMINI 2018.11.13 152
Notice Special 11/20 (Tue) Prof. Alfonso H. W. Ngan (Department of Mechanical Engineering, University of Hong Kong) file ADMINI 2018.11.13 166
Notice Regular 11/13 (Tue) Dr. Kang-Wook Lee (SK Hynix) ADMINI 2018.11.13 106
Notice Regular 11/6 (Tue) Prof. Dongchan Jang (KAIST NQE) ADMINI 2018.11.02 179
Notice Special 11/2 (Fri) Dr. Sungbong Park (Intel Corporation) ADMINI 2018.10.30 207
276 Regular 10/30 (Tue) Dr. Myung-Il Park (Korea Technology Finance Corporation) ADMINI 2018.10.26 135
275 Regular 10/23 (Tue) Dr. Sang-Soo Han (H&P International Patent & Law Office) ADMINI 2018.10.19 125
274 Regular 10/2 (Tue) Prof. Dohwan Kim (Hanyang Univ.) ADMINI 2018.10.01 282
273 Regular 9/18 (Tue) Prof. Seong Jun Kang (Kyung Hee Univ.) ADMINI 2018.09.17 370
272 Regular 9/11 (Tue) Dr. Byeongdu Lee (Argonne National Laboratory) ADMINI 2018.09.07 457
271 Regular 9/4 (Tue) Prof. Kibum Kang (Department of MSE, KAIST) ADMINI 2018.09.03 445
270 Regular 8/28 (Tue) Prof. Kyung-Min Kim (Department of MSE, KAIST) ADMINI 2018.08.24 524
269 Special 8/24 (Fri) Prof. Joel W. Ager III (UC Berkeley, Lawrence Berkeley National Laboratory) file ADMINI 2018.08.20 403
268 Special 8/23 (Thu) Prof. Jeehwan Kim (MIT, USA) file ADMINI 2018.08.20 345
267 Special 8/23 (Thu) Prof. YANGUANG LI (Soochow University) file ADMINI 2018.08.20 235
266 Special 7/25 (Wed) Dr. Chang Sub Kim (Department of MSE, MIT) ADMINI 2018.07.24 464
265 Special 7/13 (Fri) Prof. Dong Ryeol Whang (Johannes Kepler University Linz, Austria) file ADMINI 2018.07.09 440
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