Methods of material hydrophilization by siloxanes containing nitrilopoly (methylenephosphonic acid) or derivatives thereof

A method of imparting hydrophilicity to a surface of a material, which comprises:

• providing a base material comprising a surface;
• applying and chemically fixing a siloxane oligomer represented by Chemical Formula 1 to the surface of the base material to form a siloxane-modified surface;
• and
• applying a phosphonic acid compound represented by Chemical Formula 2 to the siloxane-modified surface and carrying out a reaction therebetween to form an organosiloxane coating:
• wherein in Chemical Formula 1,
• R1, R2, and R3 are the same or different, and are each independently hydrogen or a C1 to C3 alkyl group,
• A is a single bond or a C1 to C5 alkylene group, and
• n ranges from 2 to 30;
• GN[CH2PO3H2]2 Chemical Formula 2
• wherein in Chemical Formula 2,
• G is —CH2PO3H2, a group represented by Chemical Formula 3, or a group represented by Chemical Formula 4:
• wherein in Chemical Formula 3,
• m is an integer ranging from 2 to 8;
• and
• wherein in Chemical Formula 4,
• a and b are the same or different and are each independently integers ranging from 2 to 6.