formula R4R5R6N???O, wherein R4 is a linear or branched C8-C40 saturated or unsaturated group and R5 and R6 are linked to form a cyclic group; (iii) a dialkylpiperazine di-N-Oxide having the formula wherein R8 is a linear or branched C8 to C40 saturated or unsaturated group; and R9 is a C1 group, linear saturated or unsaturated C2-C40 group, or branched saturated or unsaturated C3-C40 group; (iv)