| http://www.w3.org/ns/prov#value | - -CH2 --NH)x --CH2 --CH2 --CH2 --COOH; nonionic surfactants of formula (III): R--O(CH2 --CH2 --O)x --CH2 --CH2 --OH; and polycationic surfactants of formula (IV): R--NH(CH2 --CH2 --CH2 --NH)x --CH2 --CH2 --CH2 --NH2 ; wherein R is a C8 to C18 hydrocarbon chain and x is from 1 to 10 in the surfactants containing nitrogen and from 4 to 16 in the surfactants containing oxygen; soaking the polymeric hy
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