How can i stop split or brtille ends from forming with a straightener?

Go to a beauty supply store and purchase Roux brand-Porosity Control shampoo and conditioner. Or may I suggest using mayonnaise with a shower cap at least once a week. After shampooing, appy enough mayonnaise to cover the hair, use a shower cap and to speed up the process you can sit under a hair dryer for 15 minutes, if no hooded hair dryer is available you can just let it sit on hair for 25 minutes (the head produces the most body heat) then rinse the hair well, with luke warm water. You can also purchase a protein type treatment for the hair as well.