A novel method for measuring dynamic contact angles of fibers with spindle‐knots
A novel method for measuring dynamic contact angles of fibers with spindle‐knots
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DOI：
10.1002/app.50673
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发表时间：
2021-03
影响因子：
3
通讯作者：
Maryam Aliabadi;W. Konrad;T. Stegmaier;V. Arnim;Çigdem Kaya;Yan Liu;Bin Zhan;Gouyong Wang
中科院分区：
文献类型：
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作者：
Maryam Aliabadi;W. Konrad;T. Stegmaier;V. Arnim;Çigdem Kaya;Yan Liu;Bin Zhan;Gouyong Wang
动态接触角的测定对于表征不同科学技术领域中的工业纤维和纺织品的润湿性具有重要意义。存在用于平坦表面和沿着纤维具有均匀横截面形状的纤维的动态接触角测量的传统方法。然而，到目前为止，还没有报道适用于结构化纤维，特别是不同截面的纺锤结结构化纤维的方法。本文介绍了一种测量聚二甲基硅氧烷（PDMS）纺锭打结结构纤维动态接触角的新方法。该方法是一个整合的结果从实验（施加力张力）和一个建议的理论模型描述这样的纤维。通过比较PDMS作为轴结和作为平面的动态接触角的测量结果，显示了结果的可靠性和一致性。该方法为更好地分析各种结构纤维的润湿性奠定了基础。它还允许测量宏观/微观结构化纤维（特别是当它们作为平坦表面不可接近时）对各种测试液体的局部后退和前进接触角。
The determination of the dynamic contact angle is of significant interest for the characterization of the wettability of technical fibers and textiles in diverse fields of science and technology. There exist traditional methods for dynamic contact angle measurements of flat surfaces and of fibers with a uniform cross‐sectional shape along the fiber. So far, however, no method has been reported which is suitable for structured fibers, particularly for spindle‐knotted structured fibers of varying cross‐sections. This article describes a new method for measuring the dynamic contact angle for polydimethylsiloxane (PDMS) spindle‐knotted structured fibers. The method is an outcome of integrating the results obtained from experiments (applying force tensiometry) and a proposed theoretical model describing such fibers. The reliability and conformity of the results are shown by comparing the measured dynamic contacts angle of PDMS as spindle‐knot and as a flat surface. This method may pave the road for better wettability analysis of various structured fibers. It also allows to measure the local receding and advancing contact angles for macroscopic/microscopic structured fibers (especially when they are not accessible as flat surfaces) against the various test liquids.