Rainfastness of Poly(vinyl alcohol) Deposits on Vicia faba Leaf Surfaces: From Laboratory-Scale Washing to Simulated Rain | Zendy

Brett L. Symonds | Zendy; Niall R. Thomson | Zendy; Christopher I. Lindsay | Zendy; Vitaliy V. Khutoryanskiy | Zendy

Open Access

Rainfastness of Poly(vinyl alcohol) Deposits on Vicia faba Leaf Surfaces: From Laboratory-Scale Washing to Simulated Rain

Author(s) -

Brett L. Symonds,

Niall R. Thomson,

Christopher I. Lindsay,

Vitaliy V. Khutoryanskiy

Publication year - 2016

Publication title -

acs applied materials and interfaces

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.535

H-Index - 228

eISSN - 1944-8252

pISSN - 1944-8244

DOI - 10.1021/acsami.6b01682

Subject(s) - vinyl alcohol , crystallinity , materials science , vicia faba , dissolution , swelling , alcohol , polymer , chemical engineering , organic chemistry , chemistry , composite material , botany , engineering , biology

Rainfastness is the ability of agrochemical deposits to resist wash-off by rain and other related environmental phenomena. This work reports laboratory-scale and raintower studies of the rainfastness of fluorescently labeled poly(vinyl alcohol) (PVA) using fluorescent microscopy combined with image analysis. Samples of hydrolyzed PVA exhibit improved rainfastness over a threshold molecular weight, which correlates with PVA film dissolution, swelling, and crystalline properties. It was also established that the rainfastness of PVA scaled with the molecular weight over this threshold. These PVA samples were further characterized in order to determine the effect of the crystallinity on rainfastness. The quantification of rainfastness is of great interest to the field of agrochemical formulation development in order to improve the efficacy of pesticides and their adjuvants.

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