Toughening hydrogels through force-triggered chemical reactions that lengthen polymer strands
<jats:title>Longer and stronger; stiff but not brittle</jats:title> <jats:p> Hydrogels are highly water-swollen, cross-linked polymers. Although they can be highly deformed, they tend to be weak, and methods to strengthen or toughen them tend to reduce stret...
| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Association for the Advancement of Science (AAAS)
2022
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| Online Access: | https://hdl.handle.net/1721.1/141093 |
| _version_ | 1826214528625410048 |
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| author | Wang, Zi Zheng, Xujun Ouchi, Tetsu Kouznetsova, Tatiana B Beech, Haley K Av-Ron, Sarah Matsuda, Takahiro Bowser, Brandon H Wang, Shu Johnson, Jeremiah A Kalow, Julia A Olsen, Bradley D Gong, Jian Ping Rubinstein, Michael Craig, Stephen L |
| author_facet | Wang, Zi Zheng, Xujun Ouchi, Tetsu Kouznetsova, Tatiana B Beech, Haley K Av-Ron, Sarah Matsuda, Takahiro Bowser, Brandon H Wang, Shu Johnson, Jeremiah A Kalow, Julia A Olsen, Bradley D Gong, Jian Ping Rubinstein, Michael Craig, Stephen L |
| author_sort | Wang, Zi |
| collection | MIT |
| description | <jats:title>Longer and stronger; stiff but not brittle</jats:title>
<jats:p>
Hydrogels are highly water-swollen, cross-linked polymers. Although they can be highly deformed, they tend to be weak, and methods to strengthen or toughen them tend to reduce stretchability. Two papers now report strategies to create tough but deformable hydrogels (see the Perspective by Bosnjak and Silberstein). Wang
<jats:italic>et al</jats:italic>
. introduced a toughening mechanism by storing releasable extra chain length in the stiff part of a double-network hydrogel. A high applied force triggered the opening of cycling strands that were only activated at high chain extension. Kim
<jats:italic>et al</jats:italic>
. synthesized acrylamide gels in which dense entanglements could be achieved by using unusually low amounts of water, cross-linker, and initiator during the synthesis. This approach improves the mechanical strength in solid form while also improving the wear resistance once swollen as a hydrogel. —MSL
</jats:p> |
| first_indexed | 2024-09-23T16:06:51Z |
| format | Article |
| id | mit-1721.1/141093 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T16:06:51Z |
| publishDate | 2022 |
| publisher | American Association for the Advancement of Science (AAAS) |
| record_format | dspace |
| spelling | mit-1721.1/1410932022-03-10T03:03:00Z Toughening hydrogels through force-triggered chemical reactions that lengthen polymer strands Wang, Zi Zheng, Xujun Ouchi, Tetsu Kouznetsova, Tatiana B Beech, Haley K Av-Ron, Sarah Matsuda, Takahiro Bowser, Brandon H Wang, Shu Johnson, Jeremiah A Kalow, Julia A Olsen, Bradley D Gong, Jian Ping Rubinstein, Michael Craig, Stephen L <jats:title>Longer and stronger; stiff but not brittle</jats:title> <jats:p> Hydrogels are highly water-swollen, cross-linked polymers. Although they can be highly deformed, they tend to be weak, and methods to strengthen or toughen them tend to reduce stretchability. Two papers now report strategies to create tough but deformable hydrogels (see the Perspective by Bosnjak and Silberstein). Wang <jats:italic>et al</jats:italic> . introduced a toughening mechanism by storing releasable extra chain length in the stiff part of a double-network hydrogel. A high applied force triggered the opening of cycling strands that were only activated at high chain extension. Kim <jats:italic>et al</jats:italic> . synthesized acrylamide gels in which dense entanglements could be achieved by using unusually low amounts of water, cross-linker, and initiator during the synthesis. This approach improves the mechanical strength in solid form while also improving the wear resistance once swollen as a hydrogel. —MSL </jats:p> 2022-03-09T17:03:42Z 2022-03-09T17:03:42Z 2021-10-08 2022-03-09T16:56:12Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/141093 Wang, Zi, Zheng, Xujun, Ouchi, Tetsu, Kouznetsova, Tatiana B, Beech, Haley K et al. 2021. "Toughening hydrogels through force-triggered chemical reactions that lengthen polymer strands." Science, 374 (6564). en 10.1126/science.abg2689 Science Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf American Association for the Advancement of Science (AAAS) chemRxiv |
| spellingShingle | Wang, Zi Zheng, Xujun Ouchi, Tetsu Kouznetsova, Tatiana B Beech, Haley K Av-Ron, Sarah Matsuda, Takahiro Bowser, Brandon H Wang, Shu Johnson, Jeremiah A Kalow, Julia A Olsen, Bradley D Gong, Jian Ping Rubinstein, Michael Craig, Stephen L Toughening hydrogels through force-triggered chemical reactions that lengthen polymer strands |
| title | Toughening hydrogels through force-triggered chemical reactions that lengthen polymer strands |
| title_full | Toughening hydrogels through force-triggered chemical reactions that lengthen polymer strands |
| title_fullStr | Toughening hydrogels through force-triggered chemical reactions that lengthen polymer strands |
| title_full_unstemmed | Toughening hydrogels through force-triggered chemical reactions that lengthen polymer strands |
| title_short | Toughening hydrogels through force-triggered chemical reactions that lengthen polymer strands |
| title_sort | toughening hydrogels through force triggered chemical reactions that lengthen polymer strands |
| url | https://hdl.handle.net/1721.1/141093 |
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