...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied Microbiology and Biotechnology >Amine-modified magnetic iron oxide nanoparticle as a promising carrier for application in bio self-healing concrete
【24h】

Amine-modified magnetic iron oxide nanoparticle as a promising carrier for application in bio self-healing concrete

机译：胺改性磁性氧化铁纳米粒子作为一种有望的载体，用于在生物自愈混凝土中应用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Self-healing mechanisms are a promising solution to address the concrete cracking issue. Among the investigated self-healing strategies, the biotechnological approach is distinguished itself by inducing the most compatible material with concrete composition. In this method, the potent bacteria and nutrients are incorporated into the concrete matrix. Once cracking occurs, the bacteria will be activated, and the induced CaCO3 crystals will seal the concrete cracks. However, the effectiveness of a bio self-healing concrete strictly depends on the viability of bacteria. Therefore, it is required to protect the bacteria from the resulted shear forces caused by mixing and drying shrinkage of concrete. Due to the positive effects on mechanical properties and the high compatibility of metallic nanoparticles with concrete composition, for the first time, we propose 3-aminopropyltriethoxy silane-coated iron oxide nanoparticles (APTES-coated IONs) as a biocompatible carrier for Bacillus species. This study was aimed to investigate the effect of APTES-coated IONs on the bacterial viability and CaCO3 yield for future application in the concrete structures. The APTES-coated IONs were successfully synthesized and characterized by transmission electron microscopy (TEM), X-ray powder diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). The results show that the presence of 100 mu g/mL APTES-coated IONs could increase the bacterial viability. It was also found that the CaCO3-specific yield was significantly affected in the presence of APTES-coated IONs. The highest CaCO3-specific yield was achieved when the cells were decorated with 50 mu g/mL of APTES-coated IONs. This study provides new insights for the application of APTES-coated IONs in designing bio self-healing strategies.
机译：自我修复机制是解决具体开裂问题的有希望的解决方案。在调查的自我愈合策略中，通过用混凝土组成诱导最具相容的材料，生物技术方法自然。在该方法中，效力细菌和营养物掺入混凝土基质中。一旦发生破裂，将激活细菌，并且诱导的CaCO 3晶体将密封混凝土裂缝。然而，生物愈合混凝土的有效性严格依赖于细菌的可行性。因此，需要保护细菌免受由混凝土混合和干燥收缩引起的产生的剪切力。由于对机械性能的积极作用和金属纳米颗粒具有混凝土组合物的高相容性，首次将3-氨基丙基三乙氧基涂层氧化铁纳米颗粒（Aptes涂覆的离子）提出为杆菌物种的生物相容性载体。本研究旨在探讨涂层离子对细菌活力和CaCO3的效果，以便在混凝土结构中的应用。通过透射电子显微镜（TEM），X射线粉末衍射（XRD）和傅里叶变换红外光谱（FTIR）成功地合成并表征了APTES涂覆的离子并表征。结果表明，存在100μg/ ml Aptes涂覆的离子的存在可以增加细菌活力。还发现，在涂覆的离子存在下，CaCO 3特异性产率显着影响。当细胞用50μg/ ml涂覆的离子装饰时，实现了最高的Caco3特异性产量。本研究为在设计生物自我修复策略方面应用Aptes涂层离子的应用提供了新的见解。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号