CAS Key Laboratory of Bio-Inspired Materials and Interfacial Science, CAS Center for Excellence in Nanoscience, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
Adv Mater. 2019 Oct;31(41):e1904113. doi: 10.1002/adma.201904113. Epub 2019 Aug 28.
Excessive sweat secreted from the skin often causes undesired adhesion from wetted textiles and cold sensations. Traditional hydrophilic textiles such as cotton can absorb sweat but retain it. A hydrophobic/superhydrophilic Janus polyester/nitrocellulose textile embedded with a conical micropore array with a hydrophilic inner surface that can achieve directional liquid transport (with an ultrahigh directional water transport capability of 1246%) and maintain human body temperature (2-3 °C higher than with cotton textiles) is demonstrated. When the hydrophobic polyester layer with large opening of hydrophilic conical micropores contacts the liquid, the Janus polyester/nitrocellulose textile can pump it to the superhydrophilic nitrocellulose layer through the hydrophilic conical micropores driven by capillary force. The Janus polyester/nitrocellulose textile can weaken undesired wet adhesion and heat loss due to the removal of liquid. The water wicking and air permeability of the Janus polyester/nitrocellulose textile is comparable to those of traditional cloths. This study is valuable for designing of functional textiles with directional water transport properties for personal drying and warming applications.
皮肤分泌的过多汗液常常导致湿润的纺织品产生不必要的粘连和冷感。传统的亲水性纺织品，如棉花，可以吸收汗液，但却会使其保留在内部。本文展示了一种嵌入有锥形微针孔阵列的疏油/超亲水聚酯/硝化纤维素纺织品，其具有亲水的内表面，可实现定向液体传输（具有超高的定向水传输能力，达 1246%），并维持人体体温（比棉质纺织品高 2-3°C）。当具有大开口亲水锥形微孔的疏油聚酯层接触液体时，Janus 聚酯/硝化纤维素纺织品可在毛细作用力的驱动下，通过亲水锥形微孔将其泵送至超亲水硝化纤维素层。Janus 聚酯/硝化纤维素纺织品可通过去除液体来减弱不必要的湿黏附和热损失。Janus 聚酯/硝化纤维素纺织品的导水性能和透气性与传统布料相当。这项研究对于设计具有定向输水性的功能性纺织品，用于个人干燥和保暖应用具有重要价值。
