Q: Is foam a substance that is formed by trapping pockets of gas in a liquid or solid? ¶
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? ¶
Q: Are foams into closed-cell foams and open-cell foams? ¶
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? ¶
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? ¶
Q: Is foam widely used as core material in sandwich-structured composite materials? ¶
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? ¶
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? ¶
Q: Are foams also in general denser? ¶
A: Yes, and require more material, and as a consequence are more expensive to produce.