Hydrophobically and hydrophilically modified polysaccharides and methods of using the same for treatment of a subterranean formation

A method of treating a subterranean formation, the method comprising:

• placing in the subterranean formation a composition comprising
• a hydrophobically and hydrophilically modified polysaccharide (HHMP) comprising a monosaccharide repeating unit having the structure:
• wherein R1═—OH, R5═—O—(C1-C5)alkyl-OH, and R3═—(C1-C5)alkyl-O—(C1-C5)alkyl-O—R6;
• at each occurrence R6 is independently selected from —H, —PG, and —NPG;
• at each occurrence hydrophilic group PG is independently -L-(C0-C10)alkyl-A, wherein at each occurrence A is independently selected from the group consisting of —C(O)O−CI+, —S(O)(O)O−C+, and —P(O)(O)(O−CI+)(O−R+), wherein at each occurrence CI+ is independently a counterion, and wherein at each occurrence R+ is independently selected from the group consisting of H+ and CI+ wherein at each occurrence CI+ is selected from the group consisting of Na+, K+, Li+, Zn+, and NH4+;
• at each occurrence L is independently selected from the group consisting of
• (C1-C5)alkyl substituted with 0, 1, 2, or 3 —OH and interrupted or terminated by 0, 1, 2, or 3 oxygen atoms, and
• —[R9]n— wherein at each occurrence R9 is independently (C1-C5)alkyl substituted with 0, 1, 2, or 3 —OH, interrupted or terminated by 0, 1, 2, or 3 oxygen atoms, and at each occurrence n is independently about 2 to about 5;
• wherein the HHMP has about 0.000,01 to about 0.999,99 PG groups per monosaccharide unit and the HHMP has about 0.000,01 to about 0.999,99 NPG groups per monosaccharide unit.