Surface integration of polyelectrolyte and zeolitic imidazolate framework-67 for multifunctional poly (lactic acid) non-woven fabrics
Surface integration of polyelectrolyte and zeolitic imidazolate framework-67 for multifunctional poly (lactic acid) non-woven fabrics
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聚电解质与咪唑骨架67沸石的表面集成用于多功能聚乳酸无纺布
DOI：
10.1016/j.apsusc.2021.151039
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发表时间：
2021-12
影响因子：
6.7
通讯作者：
Zhang Sheng
中科院分区：
文献类型：
--
作者：
Wang Xingguo;Liu Chang;Meng Dan;Sun Jun;Fei Bin;Li Hongfei;Gu Xiaoyu;Zhang Sheng
环保型生物基聚乳酸（PLA）非织造布（NFs）具有替代石油基纤维的巨大潜力，但目前多功能PLA非织造布的制备还缺乏关注。本文采用浸轧法对聚乳酸（PLA）非织造布进行表面处理，然后原位生长咪唑骨架分子筛（ZIF-67），以提高PLA非织造布的阻燃、抗菌和抗紫外线性能。PLA/APTris/ZIF 67织物样品的燃烧性能表征表明，极限氧指数值从18.1%增加到27.5%。APTris/ZIF 67的引入显著降低了样品的受损面积、热释放速率和峰值热释放速率，分别降低了83.0%、33.1%和26.4%。结果表明，APTris和ZIF-67协同作用促进了致密炭层的形成，通过吸附和催化作用抑制了火焰传播，降低了烟气释放量。此外，处理后的非织造布样品具有抗紫外线性能和对革兰氏阳性金黄色葡萄球菌（S。aureus）和革兰氏阴性大肠杆菌（E.大肠杆菌）。APTris和ZIF-67的结合所带来的独特表面改性为制造多功能PLA无纺布提供了新的机会。
Eco-friendly bio-based poly (lactic acid) (PLA) non-woven fabrics (NFs) presents great potential to replace petroleum-based fabrics, whereas the attention for preparing multifunctional PLA NFs is still scarce at present. Herein, PLA non-woven fabrics were surface treated by a padding process with polyelectrolyte (APTris) followed by an in-situ growth with zeolitic imidazolate framework-67 (ZIF-67) to improve the flame retardant, antibacterial and ultraviolet (UV) resistant properties. The flammability characterization of the PLA/APTris/ZIF67 fabric sample indicated that the limited oxygen index value was increased to 27.5% from 18.1%. The introduction of APTris/ZIF67 significantly decreased the damaged area, heat release rate, and peak heat release rate of the sample by 83.0%, 33.1%, and 26.4% respectively. It was suggested that APTris and ZIF-67 synergistically promoted the formation of dense char layers, which inhibited the flame spread and reduced the smoke release by adsorption and catalysis effects. Besides, the treated non-woven samples exhibited UV resistant properties and specific antibacterial actions against gram-positive Staphylococcus aureus (S. aureus) and gram-negative Escherichia coli (E. coli). This unique surface modification with the combination of APTris and ZIF-67 provides a new opportunity for manufacturing multifunctional PLA non-woven fabrics.
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