{"title":"Tuning Room-Temperature Injectability of Gelatin-Based Hydrogels via Introduction of Competitive Hydrogen Bonds","authors":"Donglin Xie, Jiang Bian, Chao Ni, Pei Zhao, Zuo Pu, Jun Yue","doi":"10.1021/acsmacrolett.5c00018","DOIUrl":null,"url":null,"abstract":"As a natural biomaterial with a superior comprehensive performance, gelatin has been widely explored in various biomedical and bioengineering applications. However, the ease of solidification of gelatin solutions at room temperature causes great inconvenience in specific application scenarios where injection is required. Here we addressed this problem by introduction of competitive hydrogen bond (CHB)-containing substances to gelatin to interfere with the original intergelatin hydrogen bonds. Four representative CHB materials, metformin, <span>l</span>-arginine, polyarginine, and polyurea, all showed remarkable efficiency in tuning the “sol-gel” phase transition temperature of gelatin in a concentration-dependent manner. Systematic rheological measurements indicated that the addition of CHB materials significantly improved the room-temperature injectability of gelatin. Compared to gelatin alone, CHB-containing gelatin bioinks showed improved printability and shape fidelity in 3D bioprinting.","PeriodicalId":18,"journal":{"name":"ACS Macro Letters","volume":"65 1","pages":""},"PeriodicalIF":5.1000,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Macro Letters","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1021/acsmacrolett.5c00018","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
引用次数: 0
Abstract
As a natural biomaterial with a superior comprehensive performance, gelatin has been widely explored in various biomedical and bioengineering applications. However, the ease of solidification of gelatin solutions at room temperature causes great inconvenience in specific application scenarios where injection is required. Here we addressed this problem by introduction of competitive hydrogen bond (CHB)-containing substances to gelatin to interfere with the original intergelatin hydrogen bonds. Four representative CHB materials, metformin, l-arginine, polyarginine, and polyurea, all showed remarkable efficiency in tuning the “sol-gel” phase transition temperature of gelatin in a concentration-dependent manner. Systematic rheological measurements indicated that the addition of CHB materials significantly improved the room-temperature injectability of gelatin. Compared to gelatin alone, CHB-containing gelatin bioinks showed improved printability and shape fidelity in 3D bioprinting.
期刊介绍：
ACS Macro Letters publishes research in all areas of contemporary soft matter science in which macromolecules play a key role, including nanotechnology, self-assembly, supramolecular chemistry, biomaterials, energy generation and storage, and renewable/sustainable materials. Submissions to ACS Macro Letters should justify clearly the rapid disclosure of the key elements of the study. The scope of the journal includes high-impact research of broad interest in all areas of polymer science and engineering, including cross-disciplinary research that interfaces with polymer science.
With the launch of ACS Macro Letters, all Communications that were formerly published in Macromolecules and Biomacromolecules will be published as Letters in ACS Macro Letters.
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