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000829811 0247_ $$2doi$$a10.1021/acs.macromol.7b00319
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000829811 1001_ $$0P:(DE-HGF)0$$aMihajlovic, Marko$$b0
000829811 245__ $$aTough Supramolecular Hydrogel Based on Strong Hydrophobic Interactions in a Multiblock Segmented Copolymer
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000829811 520__ $$aWe report the preparation and structural and mechanical characterization of a tough supramolecular hydrogel, based exclusively on hydrophobic association. The system consists of a multiblock, segmented copolymer of hydrophilic poly(ethylene glycol) (PEG) and hydrophobic dimer fatty acid (DFA) building blocks. A series of copolymers containing 2K, 4K, and 8K PEG were prepared. Upon swelling in water, a network is formed by self-assembly of hydrophobic DFA units in micellar domains, which act as stable physical cross-link points. The resulting hydrogels are noneroding and contain 75–92 wt % of water at swelling equilibrium. Small-angle neutron scattering (SANS) measurements showed that the aggregation number of micelles ranges from 2 × 102 to 6 × 102 DFA units, increasing with PEG molecular weight. Mechanical characterization indicated that the hydrogel containing PEG 2000 is mechanically very stable and tough, possessing a tensile toughness of 4.12 MJ/m3. The high toughness, processability, and ease of preparation make these hydrogels very attractive for applications where mechanical stability and load bearing features of soft materials are required.
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000829811 7001_ $$0P:(DE-Juel1)162139$$aStaropoli, Mariapaola$$b1
000829811 7001_ $$0P:(DE-Juel1)130507$$aAppavou, Marie-Sousai$$b2
000829811 7001_ $$0P:(DE-HGF)0$$aWyss, Hans M.$$b3
000829811 7001_ $$0P:(DE-Juel1)130902$$aPyckhout-Hintzen, Wim$$b4
000829811 7001_ $$0P:(DE-HGF)0$$aSijbesma, Rint P.$$b5$$eCorresponding author
000829811 773__ $$0PERI:(DE-600)1491942-4$$a10.1021/acs.macromol.7b00319$$gVol. 50, no. 8, p. 3333 - 3346$$n8$$p3333 - 3346$$tMacromolecules$$v50$$x1520-5835$$y2017
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