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UID:20250929T155505EDT-4263gjaKC2@132.216.98.100
DTSTAMP:20250929T195505Z
DESCRIPTION:Abstract:\n\nCellulose nanocrystals (CNCs) can be extracted fro
 m biomass\, including cotton and wood pulp. The resulting CNCs form stable
  colloidal suspensions in water and also organize into a chiral nematic li
 quid crystal when concentrated above ~4 wt% in water. This chiral nematic 
 organization is retained in dried films of CNCs\, giving films with bright
 \, iridescent colors.[1]\n\nOur group has been active in using CNCs as a t
 emplate to construct novel chiral nematic mesoporous materials with photon
 ic properties.[2] We have succeeded in preparing silica\,[3] organosilica\
 ,[4] and polymeric materials[5] through self-assembly or through hard-temp
 lating methods.\n\nIn this presentation\, I will discuss our some of our r
 ecent explorations with CNCs\, including hydrogels (Fig. 1) and aerogels\,
 [6] tactoids\,[7\,8] or elastomers with tunable optical properties.\n\n[1]
  Revol\, J.-F.\; Godbout\, L.\; Gray\, D. G. J. Pulp Pap. Sci. 1998\, 24\,
  146-149.\n[2] Giese\, M.\; Blusch\, L. K.\; Khan\, M. K.\; MacLachlan\, M
 . J. Angew. Chem. Int. Ed. 2015\, 54\, 2888-2910.\n[3] Shopsowitz\, K. E.\
 ; Qi\, H.\; Hamad\, W. Y.\; MacLachlan\, M.J. Nature 2010\, 468\, 422-425.
  \n[4] Shopsowitz\, K.E.\; Hamad\, W.Y.\; MacLachlan\, M.J. J. Am. Chem. S
 oc. 2012\, 134\, 867-870.\n[5] Khan\, M. K.\; Bsoul\, A.\; Walus\, K.\; Ha
 mad\, W. Y.\; MacLachlan\, M. J. Angew. Chem. Int. Ed. 2015\, 54\, 4304-43
 08.\n[6] Oechsle\, A. L.\; Lewis\, L.\; Hamad\, W. Y.\; Hatzikiriakos\, S.
  G.\; MacLachlan\, M. J. Chem. Mater. 2018\, 30\, 376-385. \n[7] Wang\, P.
 -X.\, Hamad\, W. Y.\; MacLachlan\, M. J. Angew. Chem. Int. Ed. 2018\, 130\
 , 3418-3423.\n[8] Wang\, P.-X.\; Hamad\, W. Y.\; MacLachlan\, M. J. Chem\,
  in revision.\n\nBio: \n\nMark MacLachlan received his B.Sc. degree in Hon
 ours Chemistry (1995) at UBC. He obtained his Ph.D. degree from the Univer
 sity of Toronto (1999)\, where he worked with Prof. Ian Manners and Prof. 
 Geoffrey Ozin in the areas of inorganic polymers and materials. After comp
 leting a 2-year NSERC Postdoctoral Fellowship in supramolecular chemistry 
 with Prof. Timothy Swager at M.I.T.\, he returned to UBC in 2001 to begin 
 his independent career. Mark’s research interests span supramolecular chem
 istry\, macrocycle chemistry\, nanomaterials\, mesoporous materials\, phot
 onic structures\, and biopolymers. He received an E. W. R. Steacie Memoria
 l Fellowship in 2012-2014 and holds the Canada Research Chair in Supramole
 cular Materials.\n
DTSTART:20190122T180000Z
DTEND:20190122T193000Z
LOCATION:Room 10\, Maass Chemistry Building\, CA\, QC\, Montreal\, H3A 0B8\
 , 801 rue Sherbrooke Ouest
SUMMARY:Chemical Society Seminar: Mark MacLachlan - New Materials from Cell
 ulose Nanocrystals
URL:/chemistry/channels/event/chemical-society-seminar
 -mark-maclachlan-new-materials-cellulose-nanocrystals-292476
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