Preparation and property of electrospining nanocopper oxide antibacterial composite nonwovens

ABSTRACT

The spread and variation of COVID-19 in the world have seriously threatened human health. Therefore the current focus of research is to develop medical and antiepidemic textiles with high filtering efficiency and bacteriostasis and low filtering resistance. Polypropylene PP melt-blown nonwovens are commonly used as raw materials for medical antiepidemic textiles. PP melt-blown nonwovens as the core filter layer of medical textiles were difficult to buy during the outbreak of the epidemic. However the traditional PP melt-blown nonwovens have low antibacterial performance and medical staff are vulnerable to virus infection and microbial damage in the process of use for their single function and certain limitations in protective ability. Therefore in the post-pandemic era PP melt-blown nonwovens should not only be able to meet the rigid demand of the market but also evolve to be high-end and functional in the face of mutating COVID-19 and the possibility of a return at any time. The research combines the PP melt-blown nonwoven with the electrospinning nanofiber membrane to prepare compound nonwoven fabrics with high antibacterial activity. In order to improve the antibacterial property of PP melt-blown nonwovens composite nanofiber membranes were synthesized on PP melt-blown nonwovens by electrospinning technology. Firstly the PP melt-blown nonwoven was used as receiving substrate of electrospinning equipment and nano copper oxide CuO-NPS was used as anti-bacterial material to prepare the PP / PAN / CuO-NPS composite nonwovens with high antibacte-rial performance. On the basis of that effects of the CuO-NPS mass fraction and electrospinning time on the surface morphology fiber diameter distribution chemical constitution filtration performance hydrophobicity and antibacterial property of composite nonwovens were studied. The results show that the bacteriostasis rates of composite nonwovens to gram-negative E. coli and gram-positive S. aureus are both greater than 99. 99% in the range of CuO-NPS mass fraction of 0. 3% - 0. 9% and the spinning time is 1 h. When the spinning time is 1 h as the mass fraction of CuO-NPS increases the fiber diameter of the composite nonwoven increases and its distribution uniformity of diameter and hydrophobic property both decrease. Under the condition of constant mass fraction of CuO-NPS the filtration efficiency of composite nonwovens improves with the extension of the spinning time but the permeability decreases. With the same spinning time the filtration efficiency of composite nonwovens increases with the increase in CuO-NPS mass fraction. In addition in-corporating CuO-NPs into PAN nanofiber membrane does not change the chemical structure of the membrane. We select polyacrylonitrile PAN with good spinning performance as the raw material and CuO-NPs as the antibacterial material to prepare CuO-NPs powder with antibacterial properties to prepare electrostatic spinning solution. The composites of PP melt-blown nonwovens and electrospun PAN / CuO-NPs nanofibrous membrane have been obtained which not only improves the filtration performance of PP melt-blown nonwovens but also endows them with efficient antibacterial property. This paper provides a reference for further studies on the production and application of PP melt-blown nonwovens. (English) [ABSTRACT FROM AUTHOR] 针对聚丙烯( PP)熔喷非织造布抗菌性能不足的问题,本文以 PP 熔喷非织造布为静电纺丝装置的接受基布、 CuO-NPs 为抗菌材料,制备具有高效抗菌性能的聚丙烯 / 聚丙烯腈 / 纳米氧化铜( PP / PAN / CuO-NPs) 复合非织造布。 研究了 CuO-NPs 质量分数 与 静 电 纺 丝 时 间 对 复 合 非 织 造 布 抗 菌 等 性 能 的 影 响。 结 果 表 明当 纺 丝 时 间 为 1 h、 CuO-NPs 质量分数在 0. 3% ~ 0. 9% 时,复合非织造布对 E. coli 和 S. aureus 的抑菌率均 > 99. 99% 。 纺丝时间为 1 h, 随着 CuO-NPs 质量分数增大,复合非织造布纤维直径增大、直径分布均匀性降低、疏水性能下降。 CuO-NPs 质量分 数不变,随着纺丝时间增加,复合非织造布的过滤效率提升,透气性却下降。 纺丝时间相同,复合非织造布的过滤效 率随着 CuO-NPs 质量分数增大而增大;CuO-NPs 质量分数增大时,复合非织造布的透气性在较短纺丝时间( 0. 5 ~ 1 h)内先下降后提升,在较长纺丝时间(1. 5 ~ 2. 5 h)内显著下降。 此外,CuO-NPs 的加入不会改变 PAN 纳米纤维膜 的化学结构。 静电纺纳米纤维膜与 PP 基布的复合可以制备高效过滤和抑菌的医用防疫纺织品。 (Chinese) [ABSTRACT FROM AUTHOR] Copyright of Journal of Silk is the property of Zhejiang Sci-Tech University Magazines and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)