Muyuan Chai, Wenwen Zhong, Shengtao Yan, Tan Ye, Rui Zheng, Zhilu Yang, Xuetao Shi
{"title":"Diffusion-induced phase separation 3D printed scaffolds for dynamic tissue repair","authors":"Muyuan Chai, Wenwen Zhong, Shengtao Yan, Tan Ye, Rui Zheng, Zhilu Yang, Xuetao Shi","doi":"10.1002/bmm2.12108","DOIUrl":null,"url":null,"abstract":"<p>Many hydrogen-bonded cross-linked hydrogels possess unique properties, but their limited processability hinders their potential applications. By incorporating a hydrogen bond dissociator (HBD) into these hydrogels, we developed injectable 3D printing inks termed diffusion-induced phase separation (DIPS) 3D printing inks. Upon extrusion into water and subsequent diffusion of HBD, these ink cure rapidly. The DIPS-printed scaffold retained most of the original hydrogel properties due to the regeneration of hydrogen bonds. Additionally, the reversible nature of hydrogen bonds provides DIPS 3D-printed scaffolds with exceptional recycling and reprinting capabilities, resulting in a reduction in the waste of valuable raw ink materials or additives. Postprocessing introduces new crosslinking methods that modulate the mechanical properties and degradation characteristics of DIPS scaffolds over a broad range. Based on its suitable mechanical properties and bioactivity, we successfully repaired and functionally reconstructed a complex defect in penile erectile tissue using the DIPS scaffold in a rabbit model. In summary, this approach is relevant for various hydrogen-bonded cross-linked hydrogels that offer mild printing conditions and enable the incorporation of bioactive agents. They can be used as scaffolds for dynamic tissue reconstruction, wearable devices, or soft robots.</p>","PeriodicalId":100191,"journal":{"name":"BMEMat","volume":"2 3","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/bmm2.12108","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"BMEMat","FirstCategoryId":"1085","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/bmm2.12108","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Many hydrogen-bonded cross-linked hydrogels possess unique properties, but their limited processability hinders their potential applications. By incorporating a hydrogen bond dissociator (HBD) into these hydrogels, we developed injectable 3D printing inks termed diffusion-induced phase separation (DIPS) 3D printing inks. Upon extrusion into water and subsequent diffusion of HBD, these ink cure rapidly. The DIPS-printed scaffold retained most of the original hydrogel properties due to the regeneration of hydrogen bonds. Additionally, the reversible nature of hydrogen bonds provides DIPS 3D-printed scaffolds with exceptional recycling and reprinting capabilities, resulting in a reduction in the waste of valuable raw ink materials or additives. Postprocessing introduces new crosslinking methods that modulate the mechanical properties and degradation characteristics of DIPS scaffolds over a broad range. Based on its suitable mechanical properties and bioactivity, we successfully repaired and functionally reconstructed a complex defect in penile erectile tissue using the DIPS scaffold in a rabbit model. In summary, this approach is relevant for various hydrogen-bonded cross-linked hydrogels that offer mild printing conditions and enable the incorporation of bioactive agents. They can be used as scaffolds for dynamic tissue reconstruction, wearable devices, or soft robots.