Alexander L. Yarin, Min Wook Lee, Seongpil An, Sam S. Yoon.
Cham, Switzerland :
Springer,
2019.
1 online resource
Advanced structured material ;
volume 105
Includes bibliographical references and index.
Intro; Preface; Contents; About the Authors; 1 Introduction; 1.1 Nature-Inspired Biomimetic Self-Healing for Self-sustained Mechanical Properties; 1.2 Self-Healing: Extension to Corrosion Protection; 1.3 Capsule-Based Approach to Self-Healing; 1.3.1 Microcapsules Filled with Healing Agents; 1.3.2 Nanoscale Capsules Filled with Healing Agents; 1.4 Tube and Channel Networks and Microfibers; 1.5 Sacrificial Materials and Shape-Memory Polymers; References; Materials and Fundamental Physicochemical Phenomena; 2 Healing Agents Used for Mechanical Recovery in Nanotextured Systems
2.1 Dicyclopentadiene (DCPD) and Grubbs' Catalyst2.2 Poly(Dimethyl Siloxane) (PDMS); 2.3 Other Elastomers; 2.4 Bisphenol-A-Based Epoxy and Other Types of Epoxy; 2.5 Gels; References; 3 Macroscopic Observations of Physicochemical Aspects of Self-Healing Phenomena; 3.1 Spreading of Released Drops of Healing Agents on Horizontal Surfaces; 3.1.1 Experimental Observations; 3.1.2 Wetting of Self-Healing Agents on Porous Electrospun NFs; 3.1.3 Coalescence of Droplets of Self-Healing Agents on Porous Electrospun NFs
3.1.4 The Hoffman-Voinov-Tanner Law and Droplet Footprint Spreading on Wettable Intact Surfaces and NF Mats3.1.5 Coalescence of Droplets on NF Mats; 3.2 Spreading on Tilted Surfaces; 3.3 Filling of Crack Tips; 3.3.1 Macroscopic View of Epoxy Release and Hardening; 3.3.2 Epoxy-Hardener Reaction Observed in a Macroscopic Crack-Tip-Shaped Mold; 3.4 Stitching Cracks and the Corresponding Mechanical Properties; 3.4.1 Macroscopic Model of Self-Healing Composite Materials with Embedded Microchannel System; 3.4.2 Release and Mixing of Healing Agents
3.4.3 Wettability-Driven Spreading and Polymerization of Healing Agents3.4.4 Recovery of Mechanical Strength; References; Fabrication Methods; 4 Fabrication of Vascular Nanofiber Networks with Encapsulated Self-Healing Agents for Mechanical Recovery; 4.1 Electrospinning; 4.1.1 Charge Relaxation Time in Electrolytes; 4.1.2 Formation of Electrospun Polymer NFs; 4.2 Co-electrospinning; 4.3 Emulsion Spinning; 4.4 Solution Blowing; 4.5 Coaxial Solution Blowing; 4.6 Emulsion Blowing; 4.7 Two- and Three-Dimensional Self-Healing Materials; 4.7.1 Two-Dimensional Planar Self-Healing Composites
4.7.2 Three-Dimensional Self-Healing CompositesReferences; 5 Characterization of Self-Healing Phenomena on Micro- and Nanoscale Level; 5.1 Visualization; 5.2 Spectroscopic Characterization; 5.3 Thermal Analysis; References; Mechanical Behavior of Self-Healing Nanotextured Materials; 6 Failure, Cracks, Fracture, Fatigue, Delamination, Adhesion, and Cohesion; 6.1 Failure Criteria; 6.2 Cracks in Brittle Elastic-Plastic Media; 6.3 Cracks in Viscoelastic Media; 6.4 Fatigue Cracks; 6.5 Critical Catastrophic Crack and Subcritical Crack Propagation; 6.6 Delamination Cracks
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This book gives an overview of the existing self-healing nanotextured vascular approaches. It describes the healing agents used in engineering self-healing materials as well as the fundamental physicochemical phenomena accompanying self-healing. This book also addresses the different fabrication methods used to form core?shell nanofiber mats. The fundamental theoretical aspects of fracture mechanics are outlined. A brief theoretical description of cracks in brittle elastic materials is given and the Griffith approach is introduced. The fracture toughness is described, including viscoelastic effects. Critical (catastrophic) and subcritical (fatigue) cracks and their growth are also described theoretically. The adhesion and cohesion energies are introduced as well, and the theory of the blister test for the two limiting cases of stiff and soft materials is developed. In addition, the effect of non-self-healing nanofiber mats on the toughening of ply surfaces in composites is discussed. The book also presents a brief description of the electrochemical theory of corrosion crack growth. All the above-mentioned phenomena are relevant in the context of self-healing materials.