Strain stiffening hydrogels through self-assembly and covalent fixation of semi-flexible fibers

M. Fernandez-Castano Romera, R.P.M. Lafleur, C. Guibert, I.K. Voets, K. Storm, R.P. Sijbesma

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

63 Citaten (Scopus)
198 Downloads (Pure)

Samenvatting

Biomimetic, strain-stiffening materials are reported, made through self-assembly and covalent fixation of small building blocks to form fibrous hydrogels that are able to stiffen by an order of magnitude in response to applied stress. The gels consist of semi-flexible rodlike micelles of bisurea bolaamphiphiles with oligo(ethylene oxide) (EO) outer blocks and a polydiacetylene (PDA) backbone. The micelles are fibers, composed of 9–10 ribbons. A gelation method based on Cu-catalyzed azide–alkyne cycloaddition (CuAAC), was developed and shown to lead to strain-stiffening hydrogels with unusual, yet universal, linear and nonlinear stress–strain response. Upon gelation, the X-ray scattering profile is unchanged, suggesting that crosslinks are formed at random positions along the fiber contour without fiber bundling. The work expands current knowledge about the design principles and chemistries needed to achieve fully synthetic, biomimetic soft matter with on-demand, targeted mechanical properties.
Originele taal-2Engels
Pagina's (van-tot)8771-8775
Aantal pagina's5
TijdschriftAngewandte Chemie - International Edition
Volume56
Nummer van het tijdschrift30
DOI's
StatusGepubliceerd - 17 jul. 2017

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