碳纤维
水溶液
材料科学
热液循环
纤维素
化学工程
冷冻干燥
羟丙基纤维素
抗菌活性
核化学
纳米技术
化学
色谱法
复合材料
有机化学
细菌
聚合物
生物
复合数
工程类
遗传学
作者
Guangqing Xu,Pan Pan,Tao Hu,Zhiyuan Chen,Hanjie Ying,Yongfeng Cheng
标识
DOI:10.1080/1536383x.2023.2263107
摘要
AbstractCarbon dots tend to aggregate into clusters during lyophilisation, and the obtained powder is highly hygroscopic and not easy to store. This study introduces a simple way to solve it. Hydroxypropyl methyl cellulose(HPMC)was selected to enhance the stability of carbon dot powder after freeze-dried. Firstly, an interesting carbon dot had been prepared from L-arginine via hydrothermal method, which showed certain antibacterial properties towards E. coli and S.aureus. Secondly, mixing carbon dots aqueous solution with HPMC according to mass ration and stirred evenly. Put the mixture into freeze drying oven until dried, and got the powder, which was tested by XPS and IR. The results demonstrated that the content of surface element in carbon dots powder has changed and owned the characteristics of HPMC. The developed carbon dot powder exhibited similar antibacterial and optical properties to those solutions and emitted significant blue fluorescence when irradiated by an ultraviolet lamp. Importantly, the solid carbon dot powder has high stability under ambient temperatures. It is stable in storage for up to one year and is no longer hygroscopic. However, the common carbon dot aqueous solution without HPMC after freeze-drying is extremely hygroscopic at room temperature and not easy to store.Keywords: L-argininesolid carbon dotshydroxypropyl methyl cellulose (HPMC)hydrothermal methodanti-microbial Disclosure statementNo potential conflict of interest was reported by the authors.Additional informationFundingThis work was supported by the State Key Laboratory of Materials-Oriented Chemical Engineering (No. SKL-MCE-22B05). The Quality Engineering Project of the Anhui Provincial Department of Education In 2022 (No. 2022cyts017) and the Department of Education of Anhui Province of China (No. KJ20190A943, KJ2020A0222, KJ2021A1227).
科研通智能强力驱动
Strongly Powered by AbleSci AI