Knowing the fact that Methyl cellulose is derived from highly purified forms of cellulose (over 99% α- cellulose); and is made by reacting cellulose with methyl chloride.
For years, I have presented methylcellulose to my students as a thickener. Your question raised my interest in this compound & I found that it also acts as a foaming agent.
Please see the reference testifying that in the link.