Bilayer fiber membrane electrospun from polylactic acid/alginate/ bromelain and polylactic acid for enhancing the functionality of tea bags

被引:6
|
作者
Zhang, Yihang [1 ]
Guo, Jing [1 ,2 ,3 ]
Sun, Jianbin [1 ]
Guan, Fucheng [1 ,3 ]
Tao, Jing [1 ]
Song, Xuecui [1 ]
Li, Zheng [1 ]
机构
[1] Dalian Polytech Univ, Sch Text & Mat Engn, Dalian 116034, Peoples R China
[2] Qingdao Univ, State Key Lab Biofibers & Ecotext, Qingdao 266071, Peoples R China
[3] Dalian Polytech Univ, Coll Text & Mat Engn, Dalian 116034, Peoples R China
基金
中国国家自然科学基金;
关键词
Skin -core nanofiber; Directed water transport; Bilayer fiber membrane; JANUS MEMBRANES; TRANSPORT; FILMS;
D O I
10.1016/j.ijbiomac.2024.129449
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
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.
引用
收藏
页数:10
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