Ming Li,Wei Peng,Chunfa Ye,Longqi Zhao,Jixiang Zhu,Chenhu Mei,Xiaoyan Li
Stretchable multifunctional electronic membranes are highly favored for wearable devices. In this study, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) was electrosprayed onto electrospun poly(styrene-ethylene/butylene-styrene) (SEBS) triblock copolymer membranes integrated with silver nanowires (AgNWs) to create SEBS/AgNW/PEDOT electronics. Through careful control of the electrospray process, capillary forces facilitated the self-assembly of AgNWs, forming a tightly coated conductive network on the SEBS fibers, which enhances interfacial bonding and mechanoelectric stability. The SEBS/AgNW/PEDOT stretchable membrane demonstrates excellent strain-sensing capabilities, a strong Joule heating effect, and high stability. The strong interfacial interaction between AgNWs and PEDOT enhances carrier mobility, resulting in an area-specific capacitance of 52.2 mF cm–2 at a current density of 0.5 mA cm–2 and good electrochemical performance even under 50% strain. The composite membranes show great potential for applications in strain sensors, flexible heaters, and supercapacitors, offering valuable insights into the development of future wearable electronic devices.
Changmin Shao,Ting Cao,Xiaochen Wang,Qihui Fan,Fangfu Ye
The lung is the respiratory organ of the human body, and the alveoli are the most basic functional units of the lung. Herein, a photo-responsive stretchable Janus membrane was proposed for the reconstruction of the alveolar–capillary barrier in vitro. This Janus membrane was fabricated by photocrosslinking methylacrylamide gelatin (Gelma) hydrogel and N-isoacrylamide (NIPAM) hydrogel mixed with graphene oxide (GO). The Gelma hydrogel containing large amounts of collagen provides a natural extracellular matrix environment for cell growth, while the temperature-sensitive NIPAM hydrogel combined with GO gives the membrane a light-controlled stretching property. Based on this Janus membrane, an open polydimethylsiloxane chip was established to coculture alveolar epithelial cells and vascular endothelial cells at the air–liquid interface. It was demonstrated that the alveolar epithelial cells cultured on the upper side of the Janus membrane could express epithelial cell marker protein E-cadherin and secrete alveolar surfactant. In addition, VE-cadherin, an endothelium-specific protein located at the junction between endothelial cells, was also detected in vascular endothelial cells cultured on the underside of Janus membrane. The constructed lung tissue model with the dynamically stretchable Janus membrane is well-suited for COVID-19 infection studies and drug testing.
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