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High compression strength single network hydrogels with pillar[5]arene junction points

Xiaowen Xu (UGent) , Adriana Jerca (UGent) , Kristof Van Hecke (UGent) , Valentin-Victor Jerca (UGent) and Richard Hoogenboom (UGent)
(2020) MATERIALS HORIZONS. 7(2). p.566-573
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Abstract
The present study highlights a straightforward and versatile strategy for the synthesis of strong poly(2-isopropenyl-2-oxazoline) hydrogels with tunable properties by using a bifunctional macrocyclic pillar[5]arene host having two carboxylic acid groups as cross-linker. This new strategy provides access to materials with tailored properties from soft and flexible to rigid and strong. The mechanical properties and water uptake of the hydrogels could be effortlessly controlled during the synthesis step through variation of the cross-linker content and after cross-linking by guest-host interactions. The hydrogels displayed strongly enhanced mechanical properties (i.e., compression and tensile modulus, energy dissipation, stress at break and storage modulus) compared to their counterparts cross-linked with linear dicarboxylic acids. The remarkable properties of the pillar[5]arene cross-linked hydrogels were assigned to the transfer of the external stress to the rigid and bulky pillar[5]arene residues that contribute to the overall dimensional stability of the hydrogels and allow energy dissipation. Moreover, we demonstrate the applicability of these materials for water purification. The hydrogels showed high adsorption performance for phenols and dyes such as methylene blue and methyl red and they could be easily regenerated, by washing with an organic solvent for reuse.
Keywords
SLIDE-RING GELS, POLY(2-ISOPROPENYL-2-OXAZOLINE), BRUSHES, RELEASE

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MLA
Xu, Xiaowen, et al. “High Compression Strength Single Network Hydrogels with Pillar[5]Arene Junction Points.” MATERIALS HORIZONS, vol. 7, no. 2, 2020, pp. 566–73.
APA
Xu, X., Jerca, A., Van Hecke, K., Jerca, V.-V., & Hoogenboom, R. (2020). High compression strength single network hydrogels with pillar[5]arene junction points. MATERIALS HORIZONS, 7(2), 566–573.
Chicago author-date
Xu, Xiaowen, Adriana Jerca, Kristof Van Hecke, Valentin-Victor Jerca, and Richard Hoogenboom. 2020. “High Compression Strength Single Network Hydrogels with Pillar[5]Arene Junction Points.” MATERIALS HORIZONS 7 (2): 566–73.
Chicago author-date (all authors)
Xu, Xiaowen, Adriana Jerca, Kristof Van Hecke, Valentin-Victor Jerca, and Richard Hoogenboom. 2020. “High Compression Strength Single Network Hydrogels with Pillar[5]Arene Junction Points.” MATERIALS HORIZONS 7 (2): 566–573.
Vancouver
1.
Xu X, Jerca A, Van Hecke K, Jerca V-V, Hoogenboom R. High compression strength single network hydrogels with pillar[5]arene junction points. MATERIALS HORIZONS. 2020;7(2):566–73.
IEEE
[1]
X. Xu, A. Jerca, K. Van Hecke, V.-V. Jerca, and R. Hoogenboom, “High compression strength single network hydrogels with pillar[5]arene junction points,” MATERIALS HORIZONS, vol. 7, no. 2, pp. 566–573, 2020.
@article{8634805,
  abstract     = {The present study highlights a straightforward and versatile strategy for the synthesis of strong poly(2-isopropenyl-2-oxazoline) hydrogels with tunable properties by using a bifunctional macrocyclic pillar[5]arene host having two carboxylic acid groups as cross-linker. This new strategy provides access to materials with tailored properties from soft and flexible to rigid and strong. The mechanical properties and water uptake of the hydrogels could be effortlessly controlled during the synthesis step through variation of the cross-linker content and after cross-linking by guest-host interactions. The hydrogels displayed strongly enhanced mechanical properties (i.e., compression and tensile modulus, energy dissipation, stress at break and storage modulus) compared to their counterparts cross-linked with linear dicarboxylic acids. The remarkable properties of the pillar[5]arene cross-linked hydrogels were assigned to the transfer of the external stress to the rigid and bulky pillar[5]arene residues that contribute to the overall dimensional stability of the hydrogels and allow energy dissipation. Moreover, we demonstrate the applicability of these materials for water purification. The hydrogels showed high adsorption performance for phenols and dyes such as methylene blue and methyl red and they could be easily regenerated, by washing with an organic solvent for reuse.},
  author       = {Xu, Xiaowen and Jerca, Adriana and Van Hecke, Kristof and Jerca, Valentin-Victor and Hoogenboom, Richard},
  issn         = {2051-6347},
  journal      = {MATERIALS HORIZONS},
  keywords     = {SLIDE-RING GELS,POLY(2-ISOPROPENYL-2-OXAZOLINE),BRUSHES,RELEASE},
  language     = {eng},
  number       = {2},
  pages        = {566--573},
  title        = {High compression strength single network hydrogels with pillar[5]arene junction points},
  url          = {http://dx.doi.org/10.1039/c9mh01401b},
  volume       = {7},
  year         = {2020},
}

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