Porous Structures of C-Shaped Polypropylene Fibers and Oil-Absorbing Performance of Their Spun-Bond Non-woven Fabrics

IF 17.2 1区工程技术 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Advanced Fiber Materials Pub Date : 2024-04-17 DOI:10.1007/s42765-024-00400-0

Zheng Li, Guojun Jiang, Yawen Zhao, Hanyue Kang, Zhiling Chen, Mingyu Zhao, Zhijuan Sun, Congjie Gao, Lixin Xue

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Abstract

Spun-bond non-woven fabrics (NWFs) made of porous C-shaped polypropylene fibers were applied in rapid oil absorption and effective on-line oil spillage monitoring. It is of great interest to further optimize the absorption properties of these materials by tuning their preparation parameters as well as characterize them with theoretical models. In this paper, effects of die shape, diluent composition (mixtures of dibutyl and dioctyl phthalate), and drawing speed on their porous structure and oil-absorbing performance were systematically investigated and characterized based on two novel concepts, i.e., the equivalent capillary tube pore radius and the kinetic pore tortuosity (barrier to access) derived from the simplest capillary tube liquid-filling model. The use of higher dibutyl phthalate fractions under faster drawing speeds resulted in the formation of larger and more connected inner filament sub-micron pores. Three stages of tube filling relating to inter-filament large pores, medium pores close to bonding points, and inner filament small pores were observed in the spun-bond NWFs. Continuous oil recovery rates of 986 L·m⁻²·h⁻¹ with an oil/water selectivity of 6.4 were achieved in dynamic skimming experiments using simulated spilled oil.

Graphical Abstract

Abstract Image

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C 形聚丙烯纤维的多孔结构及其纺粘非织造布的吸油性能

由多孔 C 型聚丙烯纤维制成的纺粘无纺布 (NWF) 被应用于快速吸油和有效的溢油在线监测。通过调整这些材料的制备参数来进一步优化其吸油性能，并利用理论模型对其进行表征是非常有意义的。本文基于两个新概念，即从最简单的毛细管充液模型中得出的等效毛细管孔半径和动力学孔迂回度（进入障碍），系统地研究和表征了模具形状、稀释剂成分（邻苯二甲酸二丁酯和邻苯二甲酸二辛酯的混合物）和拉伸速度对其多孔结构和吸油性能的影响。在更快的拉丝速度下使用更高的邻苯二甲酸二丁酯馏分，可形成更大、连接更紧密的内丝亚微米孔隙。在纺粘法无纺布中观察到了管内填充的三个阶段，即丝间大孔隙、靠近结合点的中孔隙和内丝小孔隙。在使用模拟溢油进行的动态撇油实验中，实现了 986 L-m-2-h-1 的连续采油率和 6.4 的油/水选择性。

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来源期刊

Advanced Fiber Materials Multiple-

CiteScore

18.70

自引率

11.20%

发文量

109

期刊介绍： Advanced Fiber Materials is a hybrid, peer-reviewed, international and interdisciplinary research journal which aims to publish the most important papers in fibers and fiber-related devices as well as their applications.Indexed by SCIE, EI, Scopus et al. Publishing on fiber or fiber-related materials, technology, engineering and application.