Enhanced Spray Retention Of Droplets By Host-Guest Interaction Based Surfactants Using Pillar[5]Arene

Modem agriculture is heavily dependent on pplication of pesticides.But release of active pesticide in to the ecosystem may damage its balance and disturb the systems and processes in the eco systems which will result negative impact on living beings including human.Sinke most of the pesticides are sprayed to the field enhancing the spray retention is considered as a promising way of controlling pesticide release to the environment.Retention of applied pesticides on the target plant part is a widely discussed but yet to be developed research area.Usage of surfactants is one of the mostly used approach to enhance pesticide droplet retention.Here in this research supramolecular chemistry was employed to derive a surfactant based on the interaction between supramolecular macrocyclic pillar[5]arene host and long C chain guest molecules.It was intended that water soluble prilar arene molecule to behave as the hydrophilic head part of the surfactant While the gust to behave like the hydrophobic tailIn the first section a water soluble pillar[5]aren was selected with positive charge at the each rim and was checked with five diferent guest molecules;decanoic acid,Oleic acid,tri ethylene glycol,poly ethylene glycol,N-heptyl-2-methylbenzamide for their complexation ability via HNMR and UV Vis Spectroscopy.It was proven that decanoic acid,oleic acid and MBA are interacting with the APSA host molecule.From the experiments conducted to test the surfactant activity of the host and guest molecules it was revealed that the decanoic acid perform well decreasing the contact angle upto 34%at the impact and 64%after 90 s from the impact comparatively to that of the sole decanoic droplets.It is capable of reducing contact angle on silicon surface up to 40 which is considered as a hydrophilic state.This also showed similar results on rice leaf surface.But none of the other guests were been able to perform as decanoic.