Biomimetics in Materials Science: Self-Healing, by Michael Nosonovsky, Pradeep K. Rohatgi

By Michael Nosonovsky, Pradeep K. Rohatgi

Biomimetics in fabrics Science presents a finished theoretical and useful assessment of biomimetic fabrics with self-healing, self-lubricating and self-cleaning houses. those 3 issues are heavily similar and represent speedily constructing components of research. the sphere of self-healing fabrics calls for a brand new conceptual realizing of this biomimetic know-how, that's not like conventional engineering techniques resembling put on and fatigue. Biomimetics in fabrics Science is the 1st monograph to be dedicated to those fabrics. a brand new theoretical framework for those approaches is gifted in accordance with the idea that of multi-scale constitution of entropy and non-equilibrium thermodynamics, including a close overview of the on hand know-how. The latter contains experimental, modeling, and simulation effects acquired on self-healing/lubricating/cleaning fabrics because their emergence some time past decade.

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Additional info for Biomimetics in Materials Science: Self-Healing, Self-Lubricating, and Self-Cleaning Materials

Example text

These include the gecko foot, which has a very high and adaptive adhesion, the moth eye that does not reflect light, the sharkskin which can flow underwater suppressing turbulence, the water strider leg that can stay dry, the darkling beetle that can collect dew using hydrophilic microspots, and the sand skink that can reduce friction using nanothresholds. The common feature found among many of these surfaces is that they have hierarchical roughnesses, with rough details ranging from nanometers to millimeters.

In the bulk of the body, chemical bonds exist between the molecules or atoms. To break these bonds, certain energy is required. The molecules or atoms that do not form the bonds have higher potential energy than those that form the bonds. Molecules or atoms at the surface do not form bonds on the side of the surface and thus they have higher energy (Fig. 3). This additional energy is called surface or interface free energy and is measured in energy per area; in the SI system, J mÀ2 or N mÀ1. , to form a vapor bubble inside boiling water), the energy should be supplied, which is equal to the area of the interface multiplied by the interface free energy (Nosonovsky and Bhushan 2008a).

1990). , inside microcapsules that rupture during wear, and release the lubricant. Surface microtexturing provides holes and dimples that can serve as reservoirs for lubricant is another method of providing self-lubrication. , human joints), and that the term “self-lubrication” is used also in geophysics where it refers to the abnormally low friction between tectonic plates that is observed during some earthquakes. 1 Frictional Dynamic Effects Another type of self-organizing behavior during friction is related to dynamic frictional effects, such as vibrations and waves induced by frictional sliding.

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