Foam FAQs:

Q: Is foam a substance that is formed by trapping pockets of gas in a liquid or solid?

A: Yes.

Q: Are foams that they have a very high strength-to-weight ratio?

A: Yes, and making them ideal materials for many applications, including deep-sea and space applications.

Q: Is foam of interest when analyzing failures of hydraulic components?

A: Yes.

Q: Are foams into closed-cell foams and open-cell foams?

A: Yes.

Q: Is foam created is through dispersion?

A: Yes, and where a large amount of gas is mixed with a liquid.

Q: Are foams typically disordered and have a variety of bubble sizes?

A: Yes.

Q: Is foam caused by van der Waals forces between the molecules in the foam?

A: Yes, and electrical double layers created by dipolar surfactants, and the Marangoni effect, which acts as a restoring force to the lamellae.

Q: Is foam a problem because it alters the liquid flow and blocks oxygen transfer from air?

A: Yes, For this reason, anti-foaming agents, like silicone oils, are added to prevent these problems.

Q: Are foams an important class of lightweight cellular engineering materials?

A: Yes.

Q: Is foam widely used as core material in sandwich-structured composite materials?

A: Yes.

Q: Is foam determined by the mechanical properties of the gas creating the foam: oxygen?

A: Yes, and nitrogen, or combinations.

Q: Are foams examples of dispersed media?

A: Yes.

Q: Is foam a serious problem in the chemical industry?

A: Yes, and especially for biochemical processes.

Q: Are foams closely linked to the mathematical problems of minimal surfaces and three-dimensional tessellations?

A: Yes, and also called honeycombs.

Q: Is foam in many cases a multiscale system?

A: Yes.

Q: Are foams also in general denser?

A: Yes, and require more material, and as a consequence are more expensive to produce.