卫生用品
自由面
化学工程
材料科学
纳米技术
化学
工程类
医学
机械
物理
病理
作者
Mei Liu,Ruimin Xie,Chi Ma,Jielin Xu,Run Zhao,Lili Deng,Shiyan Chen,Jianping Yang,Liming Zou,Huaping Wang,Jing Wu
标识
DOI:10.1016/j.cej.2024.153145
摘要
Conventional disposable absorbent hygiene products (DAHPs) currently represent a significant type of solid waste in landfills and are a substantial producer of fiber-based microplastics. In this work, a novel multifunctional cellulose nonwoven (CNW) is reported. The key structural design of this material was achieved by covalently grafting a naturally cycloheptatriene product namely hinokitiol and a silane covalent bridge, successfully transforming the original super hydrophilic substrate into a single-layered, multifunctional material with precisely designed liquid-discharging molecular channels and a tailored, sophisticated hydrophobic/hydrophilic distribution structure. This 3D structure perfectly mimics the conventional adhesive-bonded polyolefin/polyesters laminates comprising a top sheet and a liquid acquisition and distribution layer (ADL). The results of XPS and 1H NMR indicated the hinokitiol was successfully chemically bonded to the CNW surface. Compared with polyolefin or cotton substrates, the optimal CNW product (CNW-H-A-2) exhibits significantly improved long-term wearing comfort by minimizing the liquid strike-through time (by 26–27%), reducing wet-back amount (by 65–90%), and ensuring an outstanding air-permeability (3011 mm·s-1). Excellent antibacterial properties against Staphylococcus aureus (86.4%) and Escherichia coli (97.3%) were achieved due to the good preservation of the bioactive phenol groups of hinokitiol. Additionally, it can be completely enzymatically-degraded within 24 h. This strategy holds promise as a potential solution for mitigating fiber-based microplastics pollution of DAHPs.
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