Surfactant compositions and use thereof

A method of cleaning a membrane, the method comprising contacting the membrane with a cleaning composition, the cleaning composition comprising a compound having the structure of Formula 1:

• wherein
• A is an optionally substituted phenyl, naphthalene, pyridine, quinoline, or isoquinoline;
• and
• Z has a structure of moiety A or moiety B:
• wherein
• X is —O—, —N(R10)—, —OC(O)—, —C(O)O—, —N(R10)C(O)—, —C(O)N(R10)—, —OC(O)O—, —OC(O)N(R10)—, —N(R10)C(O)O—, or —N(R10)C(O)N(R10)—;
• n is an integer from 0 to 10;
• R6 and R9 are independently hydrogen, alkyl, or aryl;
• R7 is —(CH2)z-O—R11;
• R8 is independently hydrogen, alkyl, or aryl;
• R10 is hydrogen, alkyl, or Z;
• R11 is hydrogen or alkyl;
• m is independently an integer from 3 to 20;
• and
• z is an integer from 1 to 10.