Controlled Surface Wetting - Zheng, Yongmei

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Résumé :

Preface xiii

Acknowledgments xv

1 Wetting-Controlled Systems of Biological Surfaces 1

1.1 Introduction 1

1.1.1 Duck Feather 1

1.1.2 Insect Wings 3

1.1.3 Lotus Leaf 3

1.1.4 Beetle Back 4

1.1.5 Rice Leaf 4

1.1.6 Water Strider 4

1.1.7 Butterfly Wing 4

1.1.8 Mosquito Eye 5

1.1.9 Rose Petal 5

1.1.10 Fish Scale 5

1.1.11 Cicada Wing 6

1.1.12 Spider Silk 6

1.1.13 Salvinia 6

1.1.14 Cacti 7

1.1.15 Gecko Skin 7

1.1.16 Nepenthes 7

1.2 Wetting Features of Biological Surfaces 8

1.2.1 Wet-Rebuilt Spindle-Knot with Nanofibrils on Spider Silk 8

1.2.2 Slippery in Multiorder Ridges on Peristome Surface of Nepenthes 10

1.2.3 Selectively Directional Ratchet Transport 12

1.2.4 Multilevel Structured System of Cacti 13

1.2.5 Overlapping Arrangement of Fish Scale 14

1.3 Antiwetting Features of Biological Surfaces 16

1.3.1 Multilevel Wetting-Controlling on Duck Feather 16

1.3.2 Gradient Micro- and Nanostructures for Droplet Suspending-up 18

1.3.3 Oriented Microhair with Nanogroove for Superhdyrophobic Floating 20

1.3.4 Butterfly Wing with Multilevel-oriented Structures 21

1.4 Biological Patterns on Micro- and Nanoscale Structures 23

1.4.1 Isotropic Micro- and Nanostructured Pattern 24

1.4.2 Anisotropic Pattern for Wetting Direction 25

1.4.3 Alternative Hydrophilic-Hydrophobic Patterns 26

1.5 Wetting-Controlled Effects 27

1.5.1 Spider Silk Effect: Cooperative Effect of Roughness and Curvature 28

1.5.2 Cactus Effect: Cooperative Effect of Multilevel Conical Geometries 29

1.5.3 Araucaria Leaf Effect: Steering Effect of Asymmetric Capillary Ratchet Geometries 30

1.5.4 Beetle Back Effect: Hydrophilic-Hydrophobic Heterogeneous Pattern 31

1.5.5 Self-Propelling Effect: Ultrasuperhydrophobic Micro- and Nanostructures 32

1.5.6 Janus Effect of Antifreeze Proteins: Controlling Ice Formation 34

References 36

2 Mechanism and Theory of Wetting-Controlled Surfaces 41

2.1 Concept of Wetting-Controlled Effects 41

2.1.1 Wetting and Significance 41

2.1.2 Basic Definition of Wetting 42

2.1.3 Wetting in Biological Systems 44

2.1.4 Technological Relevance of Wetting Control 47

2.2 Wetting Theory of Surfaces 48

2.2.1 Fundamental Wetting Theories 48

2.2.2 Extension and Theoretical Models 49

2.2.3 Wetting Dynamics and Kinetics 51

2.2.4 Surface Roughness and Wetting 52

2.2.5 Wetting Transitions and Behavior 53

2.3 Physics of Wetting 55

2.3.1 Molecular Interactions in Wetting and Adhesion 55

2.3.2 Wetting Properties and Adhesion 56

2.3.3 Biological Structures and Adhesion Models 58

2.3.4 Quantitative Analysis of Wetting 59

2.3.5 Wetting Under External Influences 63

2.4 Surface Chemistry and Structures 64

2.4.1 Chemical Composition and Wetting 64

2.4.2 Surface Topography and Wetting Behavior 65

2.4.3 Chemical Modifications for Wetting Control 66

2.4.4 Chemical Heterogeneity and Janus 68

2.4.5 Chemistry Gradient for Controlling Wetting 70

2.5 Bioinspired Wetting-Controlled Mechanism 73

2.5.1 Liquid-Repellent Effects 73

2.5.2 Liquid Unidirection-Transport Effects 75

2.5.3 Controlling Ice Effects 76

2.5.4 Atmospheric Water Capture Effects 78

2.6 Self-Propelling Effects of Surfaces 82

2.6.1 Natural Self-Propelling System 82

2.6.2 Self-Propelling Theory from Gradient Surfaces 84

2.6.3 Self-Propelling Controlled on Conical-Structured Surfaces 85

2.6.4 ...

Biographie:

Yongmei Zheng, PhD, is a Professor at the Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of the Ministry of Education, School of Chemistry, Beihang University, Beijing. Her research interests are focused on bioinspired surfaces with gradient micro- and nanostructures to control dynamic wettability and develop the surfaces and materials with characteristics of fog-harvesting, tiny droplet transport, and water collection. Her publications include more than 146 SCI papers with an H index of 52.