Лако-красочные материалы — производство

Two polish’d marbles, . . . by immediate contact stick together Isaac Newton, Opticks1 Newton was convinced that bodies brought into close contact should adhere strongly. However, the experimental demonstration of this phenomenon was not so readily achieved. Newton reasoned that the imperfection of surfaces was the most important factor inhibiting contact, as described in […]

A large number of books and journals deal with molecular adhesion. Hirschfelder20 edited a fine work on Intermolecular forces, and Israelachvili21 considered the application of such forces to interfaces, and to colloidal and biological systems. Surface chemistry books have been written by Bikerman,19 Gregg,22 and Adamson.23 A number of excellent books on colloids exist, 0/1 […]

It is evident from this brief overview of adhesion technology, nature, and science that many different specialists have an interest in the definition of what adhesion is, in the observing and measurement of the adhesive forces, in the chemical modification of surfaces to control adhesiveness, in improving adhesion so that aircraft do not fall apart, […]

Long before people made their investigations into adhesion technologies, natural phenomena were occurring on the Earth’s surface, illustrating the processes of adhesion which we now understand to some degree. For example, volcanic ash was deposited over many regions. This could cement together when wet to produce the porous rock which encapsulates the ruins of Pompeii, […]

Although theories of adhesion have only been developed over this past century, the technological arts of adhesion processes have existed since prehis­toric times. Man’s inventiveness in finding ways of sticking objects together to fashion beautiful structures is perhaps the finest illustration of human intelli­gence. There is a wide range of products and processes, shown in […]

Because of the variable and unpredictable nature of adhesion, it has been a common practice through the centuries to adopt a safe approach and design structures with the worst possible scenario in mind. In other words, engineers have traditionally adopted a theory of zero adhesion. This was certainly true of medieval bridge and cathedral builders […]

Consider the adhesion of two bodies on the Earth’s surface, as shown in Fig. 1.5. However much we clean or polish the surfaces to make them smooth and free from contamination, we realize that the contact between the bodies cannot be made easily at the molecular level. Magnifying a small portion of the contact region, […]

This book is about a paradox, the adhesion paradox, which is just as challenging as Newton’s ideas about motion and gravity. In fact, the adhesion paradox can be visualized in a similar way. Common experience tells us that ordinary objects do not stick together easily. A cup does not stick to its saucer; your foot […]

For we must learn from the Phaenomena of Nature what Bodies attract one another and what are the Laws and Properties of the Attraction Isaac Newton, Opticks,1 p. 376 Isaac Newton was obsessed with the attractions between the objects which we see about us. His work is perhaps the finest illustration of the curious paradox […]

Molecular adhesion is one of the most fundamental concepts in science. Molecules tend to be stuck together to form crystals, liquids, composite materials, assembled structures, colloids, rocks, pastes, living cellular creatures, and so forth. Our universe may be expanding against the force of gravity, but each local bit of the universe is firmly stuck together […]