Organic compounds are widely used in both industry and daily life,and composite bilayer films with organic compound-triggered bending properties are promising for applications of transducers,soft robotics,and so on.He...Organic compounds are widely used in both industry and daily life,and composite bilayer films with organic compound-triggered bending properties are promising for applications of transducers,soft robotics,and so on.Here,a universal and straightforward strategy to generate composite bilayer films with organic compoundtriggered bending properties is demonstrated.The composite bilayer films with organic compound-triggered bending properties are designed with bilayer structures,in which one layer is a porous polymeric membrane with appropriate solubility parameter that matches the value of organic solvents in order to produce prominent affinity to the solvent molecules,and the other layer is reduced graphene oxide membrane stacked on the porous polymeric membrane as an inert layer for restraining the swelling of the polymeric membrane on one side.Guided by matching the solubility parameters between solvent and polymer,a significant bending curvature of 27.3 cm-1 is obtained in acetone vapor.The results in this study will provide valuable guidance for designing and developing functional composite materials with significant organic compound-triggered bending properties.展开更多
采用数值模拟方法研究了复式断面和矩形断面60°弯道明渠的流场结构。自由水面的捕捉采用VOF(Volume of Fluid)法,雷诺时均N-S方程采用雷诺应力模型封闭。对两种断面渠型水力特性的模拟结果进行了比较,结果表明:复式断面弯道明渠在...采用数值模拟方法研究了复式断面和矩形断面60°弯道明渠的流场结构。自由水面的捕捉采用VOF(Volume of Fluid)法,雷诺时均N-S方程采用雷诺应力模型封闭。对两种断面渠型水力特性的模拟结果进行了比较,结果表明:复式断面弯道明渠在弯道横断面上存在着多涡结构;滩地上的流速大于主槽上的流速;凹岸和凸岸上的自由液面水位差要比矩形断面的小;水流在渠底的横向运动强度要比矩形断面的大;弯道内外侧的压力差也与矩形断面有所不同。展开更多
基金Supported by the National Natural Science Foundation of China(21490582,21622604)the Program for Changjiang Scholars and Innovative Research Team in University(IRT15R48)the State Key Laboratory of Polymer Materials Engineering(sklpme2017-3-03,sklpme2014-1-01).
文摘Organic compounds are widely used in both industry and daily life,and composite bilayer films with organic compound-triggered bending properties are promising for applications of transducers,soft robotics,and so on.Here,a universal and straightforward strategy to generate composite bilayer films with organic compoundtriggered bending properties is demonstrated.The composite bilayer films with organic compound-triggered bending properties are designed with bilayer structures,in which one layer is a porous polymeric membrane with appropriate solubility parameter that matches the value of organic solvents in order to produce prominent affinity to the solvent molecules,and the other layer is reduced graphene oxide membrane stacked on the porous polymeric membrane as an inert layer for restraining the swelling of the polymeric membrane on one side.Guided by matching the solubility parameters between solvent and polymer,a significant bending curvature of 27.3 cm-1 is obtained in acetone vapor.The results in this study will provide valuable guidance for designing and developing functional composite materials with significant organic compound-triggered bending properties.
文摘采用数值模拟方法研究了复式断面和矩形断面60°弯道明渠的流场结构。自由水面的捕捉采用VOF(Volume of Fluid)法,雷诺时均N-S方程采用雷诺应力模型封闭。对两种断面渠型水力特性的模拟结果进行了比较,结果表明:复式断面弯道明渠在弯道横断面上存在着多涡结构;滩地上的流速大于主槽上的流速;凹岸和凸岸上的自由液面水位差要比矩形断面的小;水流在渠底的横向运动强度要比矩形断面的大;弯道内外侧的压力差也与矩形断面有所不同。
