从消耗的茶叶废物中提取的细菌纤维素的物理化学和抗菌评估
Cem Gök1,2, Arzum Işıtan3,4,5, Massimo Bersani4
1Department of Biomedical Engineering, Izmir Bakırçay University, 35665 Izmir, Türkiye.
Polymers
|September 27, 2025
概括
这项研究使用黑茶废物通过优化pH值来产生细菌纤维素 (BC),一种生物聚合物. 接近中性的pH值可以提高BC值.
科学领域:
- 生物材料科学 生物材料科学
- 可持续化学 可持续化学
- 微生物学 微生物学
背景情况:
- 细菌纤维素 (BC) 具有理想的特性,如高纯度,生物相容性和可调结构.
- 目前的大规模BC生产面临的挑战是由于基板成本高和可持续性问题.
- 利用废物作为基板为成本高效和环保的BC合成提供了一个有前途的途径.
研究的目的:
- 调查使用消耗的黑茶废弃物作为BC生产的碳来源的可行性.
- 评估不同初始pH条件对BC特性和性能的影响.
- 探索pH优化的BC膜在各种应用中的潜力.
主要方法:
- 在初始pH值在4到9之间使用消耗的黑茶废弃物培养*Komagataeibacter xylinus*ATCC 53524.
- 合成的BC膜对机械强度,吸水能力,电导率和抗菌活性进行表征.
- 使用扫描电子显微镜 (SEM) 和富里埃变换红外光谱 (FTIR) 的形态和化学分析.
主要成果:
- 在近中性pH (pH6) 制造的BC膜表现出优越的机械强度 (2.4 MPa 抗拉强度,13%延长) 和聚乙醇 (PVA) 合并 (12%).
- 在酸性pH (pH4) 时合成的BC膜显示出对大肠杆菌有显著的抗菌活性 (日志减值=3.5).
- 在pH 6下,SEM分析显示了最均的纳米纤维形态,而FTIR证实了纤维素功能组在所有条件下的完整性.
结论:
- 消耗的黑茶废弃物是可持续的细菌纤维素生产的可行,低成本的基材.
- 合成pH是影响BC膜性质的关键因素,可为特定应用量身定制性能.
- 优化的BC膜显示出在生物医学设备,灵活的电子产品和抗菌材料中使用的潜力.
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