Chemical Forums

Specialty Chemistry Forums => Materials and Nanochemistry forum => Topic started by: Soulja on December 21, 2021, 06:36:52 PM

Title: An expanding liquid or gas
Post by: Soulja on December 21, 2021, 06:36:52 PM
Hi,

Is there a widely available liquid or gas out there that'd rapidly expand (and subside) upon an "irritation" created by a simple electric circuit? For example, a tiny spark, a voltage change, a magnetic field change etc. Preferably the gas doesn't heat up substantially.

Thanks.
Title: Re: An expanding liquid or gas
Post by: Borek on December 22, 2021, 02:58:31 AM
None that I am aware of. I do remember reading about polymers that were promising for kind of an "artificial muscle" application - but they were solid.
Title: Re: An expanding liquid or gas
Post by: Corribus on December 22, 2021, 10:32:45 AM
Depends on what you mean by "rapid" and the amount of expansion you want. This property in solids is called piezoelectricity - application of mechanical force results in charging (and vice-versa - application of charging results in mechanical force). Because liquids (and certainly gasses) do not respond the same way to mechanical/sheer force as solids, this isn't something you usually associate with liquids and gasses. I believe piezoelectricity has been observed in some liquid crystals, but that may not be what you're looking for.

If electrical discharge causes a gas or liquid to heat, this would result in expansion..