Something I haven't seen ne1 mention is Aerogel... Karmachine had been looking into it before he got banned for life. it can be made from several different compounds with each having slighty different properties. drawbacks are : manufacturing source (FDA approved) and it is kinda brittle. But holy crap can it wick, capillary action is nearly double that of currently popular wicking materials.
Aerogel.org
I was looking into using aerogel or zirconia as a heat insulator for gen atty, but didn't find any affordable sources (that sell in small quantities). Never occurred to me that aerogel can be used as a wick.