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X-WR-CALNAME:Jian Ping Gong: Force-triggered growth of double network hydro
 gels
X-WR-TIMEZONE:Eastern Time (US & Canada)
BEGIN:VEVENT
DTSTAMP:20261016T232805Z
UID:tag:localist.com\,2008:EventInstance_49019632346206
DTSTART:20250404T150000Z
DTEND:20250404T160000Z
DESCRIPTION:Jian Ping Gong\n\n Faculty of Advanced Life Science\, WPI-ICReD
 D\, Hokkaido University\n\nWINSTON CHEN LECTURE\n\n \n\nBiological tissues
  are dynamic\, open systems in which structural transformations to adapt t
 o the surrounding environment are constantly occurring through metabolic p
 rocesses. For example\, skeletal muscles hypertrophy and strengthen due to
  repeated mechanical exercise. The exertion destroys the fibril structure\
 , whereas the nutrition (amino acids) supply and constructive chemical rea
 ctions grows new muscle. By contrast\, synthetic materials are static\, cl
 osed systems\, with no structural reconstruction and substance exchange wi
 th surroundings. Usually\, repetitive mechanical loading leads to damage a
 nd even failure of materials. \n\nRecently\, we present a strategy for cre
 ating metabolic-like hydrogels that self-grow and strengthen by repetitive
  mechanical stimuli. We show that the double-network hydrogels exhibit sus
 tained strength increase along with size increase under repetitive loading
  in monomer (nutrition) solution. This metabolic-like phenomenon of double
  network hydrogels is through a repetitive structural destruction and reco
 nstruction of the brittle network by mechanochemical transduction.  The un
 ique architecture of double network hydrogels —where a highly pre-stretc
 hed\, brittle first network is embedded within a more flexible second netw
 ork—enables the efficient transmission of macroscopic stress to individu
 al polymer chains and trigger chemical bond scission\, without causing mat
 erial failure. Leveraging this intrinsic mechanochemical responsiveness\, 
 we have developed DN-based materials capable of real-time damage sensing\,
  adaptive strengthening\, and autonomous repair through mechanoradical pol
 ymerization from the ruptured bonds. This mechanism also enables double ne
 twork materials to undergo force-activated morphogenesis and surface patte
 rning. Such force-induced structural growth contributes to the development
  of adaptive and self-growing materials\, holding the potential for applic
 ation to biomimetic "living materials".\n\n \n\nBio:\n\nJian Ping Gong is 
 a distinguished professor of Hokkaido University\, Japan. She graduated fr
 om Zhejiang University\, and received Doctor of Engineering at Tokyo Insti
 tute of Technology. She joined the faculty at Hokkaido University in 1993.
  She received many awards\, including Wiley Polymer Science Award (2001)\,
  the Award of the Society of Polymer Science\, Japan (2006)\, the DSM Mate
 rials Sciences Award (2014)\, the Chemical Society of Japan (CSJ) Award in
  2022\, and the APS 2023 Polymer Physics Prize. She works on tough double 
 network hydrogels\, self-healing hydrogels\, hydrogel friction and adhesio
 n\, hydrogel composites. Recently\, her interest is on self-growing hydrog
 els based on mechanochemistry.
GEO:42.3783;-71.117081
LOCATION:Pierce Hall\, 301
SUMMARY:Jian Ping Gong: Force-triggered growth of double network hydrogels
URL;VALUE=URI:https://events.seas.harvard.edu/event/jian-ping-gong-force-tr
 iggered-growth-of-double-network-hydrogels
CATEGORIES:Colloquia / Seminar / Lecture
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