The surface tension results from the very strong attraction water molecules have for each other (hydrogen bonds). The high surface tension of water allows it to support objects that are more dense than itself. This is why water drops are actually "beads" (water molecules on the surface are only attracted to water molecules within the drop; this creates a force across the surface that causes a drop of water to form a bead). Surface tension can be reduced by introducing a surfactant (a surface-acting agent)

such as detergent, which interferes with the attractive forces between the water

molecules.

Hydrogen bonds provide higher surface tension to a liquid. If you disrupt hydrogen bonds, surface tension will decrease. Thats why at high temperature, surface tension is lower due to disruption of hydrogen bonds. Hydrogen bonds can be disrupted by the addition of surfactants and surface tension can be reduced also.

See

Journal of the chemical society- pektin transaction 2

1997- page 19-24

Abraham H.M.

Chadha H.S.

Dixon J. P.

Rafols , C.

Treiner C.

Good reference:

Surface tension of hydrogen-bonded system s

Journal of colloid and interface science

1993 - vol 156 ' issue 1 page 52-55

Pspaiosnnou D

Magopoulou A.

Talilifou M