聚乳酸
双层
膜
纤维
纳米纤维
静电纺丝
莲花效应
化学
材料科学
化学工程
聚合物
纳米技术
复合材料
有机化学
生物化学
工程类
原材料
作者
Yihang Zhang,Jing Guo,Jianbin Sun,Fucheng Guan,Tao Jing,Xuecui Song,Zheng Li
标识
DOI:10.1016/j.ijbiomac.2024.129449
摘要
Tea bags have been extensively used in the food industry and daily life as an efficient way to pack tea. However, the large pores of the commercial tea bags not only lead to the inner contents of tea bag susceptible to bacteria and moisture but also result in the faster water infusion which is undesired during tea brewing. In this study, the polylactic acid (PLA)-PLA/sodium alginate (SA)/bromelain (BL) bilayer fiber membrane imitating the asymmetric wetting structure of lotus leaf blades was fabricated to avoid the above disadvantages of commercial tea bag. The PLA/SA/BL skin-core nanofiber membrane which imitating the skin-core structure of lotus leaf stems was first prepared as the hydrophilic and support layer, then a hydrophobic PLA layer was deposited on top via electrospinning. The PLA-PLA/SA/BL bilayer fiber membrane had a breaking strength of 5.5 MPa and started to decompose at 260 °C. Using this bilayer membrane, tea bags were designed with a novel structure where the hydrophobic PLA layer was placed in the same direction. The novel structure endow the those tea bags a slow and directional water transfer property. Therefore, the PLA-PLA/SA/BL bilayer fiber membrane has great potential for applications as tea bags.
科研通智能强力驱动
Strongly Powered by AbleSci AI