Antibacterial textile and method for preparing the same

An antibacterial textile comprising a surface being covalently modified by a compound having formula:

• wherein R1 represents OCN-L-NHCOO—R′ or OCN-L-NHCONH—R′;
• wherein L is a diisocyanate compound excluding both isocyanate groups, the diisocyanate compound is one selected from the group consisting of:
• isophorone diisocyanate (IPDI), toluene diisocynate (TDI), diphenylmethane diisocyanate (MDI), 1,5-naphthalene diisocyanate, tetramethyl diisocyanate, hexamethylene diisocyanate (HDI), p-phenyl diisocyanate, dimethylene phenyl diisocyanate, methylcyclohexane diisocyanate, and dicyclohexyl methane diisocyanate;
• R′=—(CH2)m, and m is a positive integer between 1 and 17;
• or R′=—(CH2)nO(CH2)y, and n is a positive integer between 1 and 17;
• y is a positive integer between 1 and 17;
• or R′=—(CH2)mAr, and m is a positive integer between 1 and 17, and Ar is aryl;
• or R′=—(CH2)nO(CH2)yAr, and n is a positive integer between 1 and 17;
• y is a positive integer between 1 and 17, and Ar is aryl;
• R4 represents —(CH2)q, and q is a positive integer between 1 and 17;
• R5 is a mono-substituent or a poly-substituent on a pyridine ring, and is any one selected from —CH3, —CH2CH3, —F, —Cl, —Br, —OMe, —CN, or —NO2;
• and
• A represents —COO, or —SO3,
• wherein the modified textile is antibacterial and maintains at least 95% of its antibacterial properties after 50 washes.